Midwife Licensure Exam Fundamentals of Care & the Health-Care Process — Basic Oxygenation, Elimination & NutritionStudy Notes

Oxygenation is a life-sustaining function that depends on three integrated components: a patent airway, effective breathing mechanics, and adequate circulation to deliver oxygen to tissues. In clinical nursing practice, your role is to maintain these pathways and recognize early signs of tissue oxygen deprivation (hypoxia). The oxygen saturation (SpO₂) measured by pulse oximetry is the primary noninvasive indicator of oxygenation. Normal SpO₂ ranges from 95–100% in healthy individuals at sea level. However, SpO₂ values below 90% signal hypoxemia—a dangerous state where arterial oxygen tension (PaO₂) is critically low—and demand immediate nursing action. Do not delay; initiate oxygen therapy and notify the physician or nurse practitioner. Recognizing hypoxia early is vital because the clinical presentation progresses from subtle early signs to severe late signs. Early signs of hypoxia include restlessness and anxiety, which are often the first manifestations—patients may appear agitated or "fighting the nurse" when actually their brain is signaling oxygen deprivation. Accompanying early signs are tachypnea (rapid, shallow breathing), tachycardia (elevated heart rate), and increased use of accessory muscles (intercostal, suprasternal, and abdominal muscles working harder to draw in air). Many nurses overlook restlessness as a sign of hypoxia and mistakenly attribute it to behavioral issues; this is a critical clinical error. Late signs of hypoxia appear after prolonged oxygen deficit and include cyanosis (a blue discoloration of lips, nailbeds, and skin, particularly visible in areas with less pigmentation in darker-skinned patients), bradycardia (slowed heart rate paradoxically occurring as the heart fails), confusion or disorientation, and severely decreased level of consciousness or unresponsiveness. Cyanosis is actually a late and unreliable sign—it may not appear in anemic patients (insufficient hemoglobin to show blue color) and is a sign of severe hypoxemia requiring emergency intervention. In the Philippine healthcare setting, where many patients in rural or remote areas may not have immediate access to advanced respiratory support, early recognition by the bedside nurse and prompt simple interventions (positioning, oxygen, encouraging cough and deep breathing) can prevent progression to severe hypoxia. Your assessment skills and clinical judgment are life-saving.

When a patient experiences dyspnea (difficulty breathing or sensation of breathlessness), one of the most effective nursing interventions is proper positioning. The body position directly affects lung expansion and the work of breathing. The high-Fowler's position (head of bed elevated 80–90 degrees, patient sitting nearly upright) maximizes lung expansion by allowing the diaphragm to move freely and increasing the anteroposterior diameter of the chest cavity. This position reduces the work of breathing and is the standard for patients experiencing dyspnea. The orthopneic position is an even more extreme positioning intervention for severe dyspnea: the patient sits upright, leans forward slightly, and may rest their arms on an overbed table or pillows placed on their lap. This tripod-like posture engages accessory muscles optimally and is often sought naturally by patients in respiratory distress. Many Filipinos are familiar with this positioning from observing elderly relatives with heart failure or chronic lung disease. Conversely, avoid supine (flat) and Trendelenburg positions in dyspneic patients, as these restrict diaphragmatic movement and worsen breathing sensation. The high-Fowler's or orthopneic position should be maintained throughout the acute phase and reassessed as the patient improves. Airway clearance is equally important. Encourage the patient to take slow, deep breaths and to cough effectively to mobilize secretions. Teach the patient the "splinting" technique for post-operative patients (holding a pillow against the incision while coughing to reduce pain and allow fuller coughing). Incentive spirometry—a device that encourages deep inspiration by providing visual feedback—is an excellent nursing tool to prevent atelectasis and mobilize secretions. Maintain adequate hydration (unless contraindicated) to keep secretions thin and easier to expectorate. In the Philippines, nursing aide staff in rural health units may not have incentive spirometers; teach patients to use a simple deep-breathing technique or even blowing through a straw into a glass of water as a substitute incentive method.

Oxygen therapy is titrated based on SpO₂, clinical assessment, and the underlying condition. The choice of delivery device depends on the required fraction of inspired oxygen (FiO₂), the patient's comfort, and the clinical scenario. Understanding the capabilities and limitations of each device is essential for the NLE. The nasal cannula is the most commonly used low-flow oxygen device in the Philippines and globally. It consists of two small prongs that fit in the nostrils and is connected to an oxygen source via tubing. Flow rates range from 1–6 L/min, delivering approximate FiO₂ concentrations of 24–44% (at 1 L/min ~24%, increasing to ~44% at 6 L/min). The nasal cannula is comfortable, allows the patient to eat, drink, and speak, and is well-tolerated for prolonged use. However, flow rates above 6 L/min do not significantly increase FiO₂ and actually dry and irritate the nasal and pharyngeal mucosa; beyond 6 L/min, a different delivery device should be used. Humidify oxygen at higher flows (above 3–4 L/min) by attaching a humidifier bottle to prevent mucosal drying. In the Philippines, where many outpatient settings may not have humidifiers, educate patients to drink warm fluids and avoid dry environments when using nasal cannula. The simple face mask covers the nose and mouth and is used at flows of 5–10 L/min, delivering FiO₂ of approximately 40–60%. The critical safety principle with a face mask is that flow must be at least 5 L/min to flush exhaled carbon dioxide (CO₂) from the mask; if flow drops below 5 L/min, CO₂ accumulates in the mask and is re-breathed, defeating the purpose of oxygen therapy. The face mask is less comfortable than a nasal cannula (many patients feel claustrophobic), makes communication difficult, and is challenging for eating; it is therefore used for shorter periods or acute situations. The partial rebreather mask has a reservoir bag that attaches below the mask. At flows of 10–15 L/min, it delivers FiO₂ of approximately 60–75%. The partial rebreather works by allowing the first third of exhaled breath (dead space air, which contains minimal CO₂) to enter the reservoir bag, mixing with incoming oxygen, while the remaining exhaled air (rich in CO₂) exits through mask ports. The reservoir bag should be about one-third to one-half full at the beginning of inspiration; if it collapses completely during inspiration, increase the flow rate. The non-rebreather mask is a high-flow device (10–15 L/min) that delivers the highest FiO₂ among masks—approximately 80–95%, approaching near 100% oxygen. It has a reservoir bag and one-way valves that prevent exhaled air from re-entering the bag; exhaled air exits only through ports in the mask. The non-rebreather is reserved for emergency situations: severe hypoxemia, carbon monoxide poisoning, or acute respiratory distress. The reservoir bag must remain at least one-third full during inspiration; if it collapses completely, increase flow or check for mask leaks. Non-rebreather masks are uncomfortable and limit communication; they are used only as long as needed. The Venturi mask is a precision oxygen delivery device that uses a jet nebulizer principle to deliver a fixed, predictable FiO₂ independent of flow rate variation. Venturi masks come with color-coded adapters that deliver specific FiO₂ levels (e.g., blue adapter ~24%, green ~28%, orange ~31%, red ~35%, yellow ~40%). This device is the gold standard for patients with COPD who are sensitive to high oxygen concentrations. The Venturi mask is preferred in COPD because it allows precise control of FiO₂, preventing the danger of excessive oxygen that can suppress the hypoxic respiratory drive in CO₂ retainers. The mask is also more comfortable than non-rebreather designs and allows eating and speaking. Oxygen safety is paramount. Oxygen supports combustion (burns burn hotter and faster in oxygen-enriched environments), so smoking and open flames are absolutely prohibited. Post "Oxygen in Use" or "No Smoking" signs visibly in the patient's room. Avoid petroleum products (petroleum jelly, oil-based cosmetics) near the patient's nose or face, as these can ignite. In the Philippine context, warn family members visiting rural facilities about smoking near patients on oxygen—this is a critical safety education point. In COPD patients who are chronic CO₂ retainers, the respiratory center is stimulated primarily by hypoxemia (not hypercapnia, as in healthy people), because their body has adapted to chronically elevated CO₂. Excessive oxygen can reduce hypoxic drive and cause hypoventilation and CO₂ retention (respiratory acidosis). Therefore, use the lowest effective oxygen flow, often administered via Venturi mask with a target SpO₂ of 88–92% (not the standard 95–100%). CRITICAL CLINICAL RULE: Do NOT withhold oxygen from a hypoxic patient in an attempt to preserve respiratory drive; instead, titrate carefully with pulse oximetry and blood gas monitoring. A hypoxic patient is in danger; the goal is to correct hypoxemia while avoiding excessive oxygen.

Suctioning is an invasive procedure that removes secretions from the airway (oral suctioning, nasopharyngeal, or endotracheal suctioning for intubated patients). While suctioning is necessary to maintain airway patency and prevent aspiration, it also temporarily removes oxygen from the airway, risking hypoxia. Therefore, suctioning must be performed with a structured, safe technique. Before suctioning, always hyperoxygenate the patient. For non-intubated patients, this means increasing oxygen delivery (e.g., increasing nasal cannula from 2 to 6 L/min or applying a face mask) for 2–3 minutes before suctioning. For intubated patients, deliver 100% oxygen via the ventilator for 3–5 minutes before the procedure. Hyperoxygenation pre-loads the blood with oxygen so that when suctioning temporarily removes air from the lungs, the patient has a reservoir to draw from. Use sterile, aseptic technique throughout suctioning to prevent introducing infection into the respiratory tract. For nasopharyngeal and endotracheal suctioning, use sterile gloves, sterile suction catheter, and sterile normal saline (not tap water, which is not sterile). Insert the suction catheter smoothly without applying suction, following the natural anatomy (for nasal suctioning, angle slightly downward along the floor of the nose; for oral suctioning, angle toward the oropharynx). Once the catheter is in position, apply intermittent suction (turning the suction on and off) or continuous suction only on the withdrawal stroke—this is critical. Applying suction during insertion causes trauma to delicate mucosa and increases discomfort. The entire suctioning procedure (including both insertion and withdrawal) should be limited to a maximum of 10–15 seconds per pass; longer suctioning causes significant oxygen removal and hypoxia. Allow the patient to rest (with restored oxygen delivery) for 1–2 minutes between suction passes. Observe the suctioned secretions: note color (clear, white, yellow, green, or blood-tinged), consistency (thin, thick, or frothy), and odor (normal or foul-smelling, which might indicate infection or aspiration). Document the findings in the patient record. After suctioning, allow the patient's oxygen saturation to return to baseline before repositioning or performing other procedures. If suctioning causes the patient to become hypoxic (SpO₂ <90%), hyperoxygenate again and notify the physician if the hypoxia persists. Mouth care is a nursing comfort measure that also supports airway health. Perform oral hygiene with a soft toothbrush (gentle to prevent trauma in patients on anticoagulants or with low platelets) or a foam swab, using mouthwash or normal saline. For patients unable to rinse and spit (intubated, unconscious, or with swallowing difficulty), perform gentle oral suctioning with a large-bore catheter to clear the mouth. Keep the oral mucosa moist and healthy to prevent bacterial colonization and aspiration pneumonia.

Normal bowel elimination varies widely among individuals—some people defecate three times daily, others three times weekly; both are normal as long as the stool is formed and painless. When assessing a patient, determine their usual pattern (frequency, consistency, and ease) and compare current function to that baseline. Do not impose arbitrary standards; a patient who normally defecates every third day and is doing so without straining is not constipated. Constipation is defined as infrequent, difficult-to-pass stool (or a deviation from the patient's normal pattern toward decreased frequency and harder consistency). Contributing factors include decreased fluid intake, low dietary fiber, sedentary lifestyle, certain medications (opioids, anticholinergics, iron supplements), ignoring the urge to defecate, and changes in routine or environment. Constipation is extremely common in hospitalized patients and post-operative patients because of reduced activity, analgesic use, and dietary changes. Nursing management of constipation begins with prevention and non-pharmacologic interventions. Increase fluid intake (unless contraindicated by heart failure or renal disease)—the colon absorbs water from stool; inadequate hydration results in hard, dry stool. Encourage dietary fiber (vegetables, fruits, whole grains, beans)—fiber adds bulk and water retention to stool. In the Philippine context, suggest local fiber sources: malunggay (moringa), leafy vegetables, kamoteng kahoy (cassava), beans, and indigenous fruits. Encourage ambulation and physical activity, which stimulates colonic motility. Establish a regular toileting routine, ideally at the same time daily (many people have a natural urge after breakfast); respond promptly to the urge to defecate and provide privacy and comfort. Many hospitalized patients are embarrassed to use a bedpan or commode; ensure privacy and dignity by closing curtains and not allowing unnecessary interruptions. Pharmacologic interventions include stool softeners (e.g., docusate), which reduce surface tension and allow water to enter the stool, making it easier to pass—these are safe for long-term use and are the first-line medication for constipation prevention in opioid patients. Bulk-forming laxatives (psyllium, methyl cellulose) absorb water and expand in the colon, increasing stool bulk and stimulating defecation—teach the patient to drink 8 oz of water with each dose to prevent the bulk former from causing obstruction. Osmotic laxatives (lactulose, polyethylene glycol) draw water into the colon by osmosis, softening stool. Stimulant laxatives (senna, bisacodyl) irritate the colonic mucosa and increase peristalsis; these are more potent but can become habit-forming if overused. Give all laxatives with plenty of water. A complication of untreated constipation is fecal impaction—a hard mass of stool lodged in the rectum. Paradoxically, a patient with severe impaction may complain of diarrhea or liquid stool leaking around the impaction; this is called "overflow diarrhea." Assessment includes abdominal distention and tenderness, absence of bowel sounds, and digital rectal examination (DRE) by the nurse or physician to palpate the hard stool mass. Manual removal of a fecal impaction requires a physician's or nurse practitioner's order; the nurse performs the procedure using sterile gloves, lubricant, and patience, removing stool gently in small pieces while monitoring the patient for vagal stimulation (which can cause bradycardia and syncope). This procedure is uncomfortable and potentially dangerous; prevention through vigilant fluid intake, fiber, activity, and regular laxatives is far preferable. Diarrhea is frequent, loose, or watery stools—a major concern because of rapid fluid and electrolyte losses, leading to dehydration. Etiologies include infectious causes (bacterial, viral, parasitic—especially important in the Philippines where waterborne infections are common), medications (antibiotics, magnesium-based laxatives), dietary indiscretion, or inflammatory bowel conditions. Assessment includes frequency and character of stools, presence of blood or mucus, associated symptoms (fever, abdominal pain, nausea), and signs of dehydration (thirst, dry mucous membranes, decreased skin turgor, weakness, tachycardia, orthostatic hypotension). Management of diarrhea prioritizes fluid and electrolyte replacement. In the Philippines, the Department of Health (DOH) promotes the use of Oral Rehydration Solution (ORS) for acute diarrhea, especially in children—ORS contains the correct ratio of water, glucose, sodium, and potassium to allow rapid intestinal absorption and replacement of losses. Teach families how to prepare ORS (WHO formula: 1 liter of water + 6 teaspoons sugar + 1/2 teaspoon salt) or provide pre-made sachets. Encourage frequent small amounts of ORS (5–10 mL every few minutes in infants, larger amounts in children and adults) rather than large volumes at once, which may trigger more vomiting. Once acute diarrhea is controlled, reintroduce age-appropriate nutrition (the "BRAT" diet—bananas, rice, applesauce, toast—is outdated; current WHO guidance recommends continuing age-appropriate nutrition as tolerated). In infants, continue breastfeeding or formula as tolerated. Zinc supplementation (10 mg daily for 10 days in children <6 months; 20 mg daily for older children; 50 mg daily for adults) is recommended by the WHO and DOH to reduce duration and severity of diarrhea and prevent recurrence. Assess the perineum and buttocks frequently for skin irritation and breakdown from frequent loose stools. Cleanse the area gently with warm water and mild soap after each bowel movement, pat dry, and apply a moisture barrier (zinc oxide paste, antifungal cream if indicated). Maintain meticulous hygiene to prevent skin breakdown and secondary infection.

An enema is the instillation of fluid into the colon via the rectum, used therapeutically to promote bowel evacuation (cleansing enema), soften impacted stool (retention enema), or deliver medication (medicated enema). Understanding the anatomy and physiology ensures safe, effective administration. The colon has distinct curves and areas: the rectum is the terminal 10–12 cm; the sigmoid colon curves to the left; the descending colon runs down the left side; the transverse colon crosses the abdomen; and the ascending colon runs up the right side. When administering an enema, positioning and fluid delivery must respect these anatomical curves to ensure the fluid reaches the intended area and stimulates evacuation in a natural, progressive manner. For a cleansing enema (the most common type), position the patient in the left lateral (Sims') position—lying on the left side with the left leg extended and the right leg flexed, exposed for access to the rectum. This position aligns the body with the natural curve of the colon (starting in the sigmoid, moving through the descending colon on the left side), allowing gravity and the colon's anatomy to direct fluid flow and maximize the stimulation of evacuation. (A prone position, sometimes mentioned in older texts, is uncomfortable and less effective; the Sims' position is standard.) Insert the lubricated enema tube (usually 22–28 French in adults) slowly and gently into the rectum. The insertion depth is approximately 7–10 cm in adults—deep enough to bypass the internal sphincter but not so deep as to perforate the colon. In children, insert only 5–7.5 cm. If the patient reports severe pain or resistance, stop and do not force; perforation of the colon is a surgical emergency. Eliminate the air from the tubing before connecting to the patient to prevent introducing air into the colon (which causes cramping and discomfort). Raise the enema solution container (bag or bucket) to approximately 30–45 cm above the patient's anus (about the level of the patient's hips when in Sims' position). The height determines the hydrostatic pressure of fluid flow—higher creates more pressure and faster flow, lower reduces pressure and flow. Adjust based on the patient's tolerance; if cramping occurs, lower the container or temporarily clamp the tubing to allow a rest period before continuing. Instill the solution slowly (over 5–10 minutes for a typical cleansing enema), allowing the colon to accommodate the fluid. The patient will feel the urge to defecate as the rectum fills; this is expected and indicates the enema is working. Encourage the patient to hold the solution as long as comfortably possible (usually a few minutes) before evacuating to allow maximal water absorption and softening of stool. If the patient feels severe pain, nausea, or dizziness, stop the enema and assess for complications (if cramping is mild, it usually resolves with rest and continuation). After administration, assist the patient to the toilet or commode, ensure privacy, and remain nearby for safety (some patients become weak or dizzy after an enema). Provide a call bell within reach. Monitor the characteristics of the stool passed and document the results (color, consistency, amount, presence of blood or abnormalities). A retention enema (oil-based, typically mineral oil or cottonseed oil) is used to soften impacted stool and is held in the colon for 30 minutes to several hours. The volume is smaller (150–200 mL) and the technique is the same, but the patient is instructed not to evacuate until the oil has had time to soften the stool. After the retention period, perform a cleansing enema to remove the softened stool. Safety considerations: avoid enemas in patients with acute abdominal pain (unless specifically ordered), recent abdominal surgery (risk of trauma to surgical sites), or inflammatory bowel disease (risk of perforation). Always check the physician's order for the specific enema type, solution, and any special instructions. Document the procedure thoroughly: solution type and temperature, volume, depth of insertion, patient tolerance, and results.

Normal adult urinary output averages 1,200–1,500 mL per 24 hours, though this varies based on fluid intake, sweating, and individual metabolism. An acceptable minimum output is approximately 30 mL per hour (or about 720 mL per 24 hours); output less than 30 mL/hour signals inadequate renal perfusion and must be reported immediately to the physician. This 30 mL/hour benchmark is critical in the NLE and in clinical practice because it indicates whether kidneys are receiving sufficient blood flow to filter urine—a fundamental marker of cardiovascular adequacy. The nursing assessment of urinary elimination includes documenting frequency, color (pale straw to deep amber depending on concentration), clarity (clear or cloudy), odor (normal or foul), and the patient's subjective symptoms. Cloudy urine or foul odor may indicate infection; hematuria (blood in urine) requires investigation; and dark, concentrated urine suggests dehydration. Common urinary elimination problems include oliguria (low output, <30 mL/hr), anuria (absent output, 0 mL in 24 hours—a medical emergency), polyuria (excessive output, >2.5 L/day—seen in diabetes insipidus or uncontrolled diabetes mellitus), dysuria (painful urination), nocturia (nighttime urination), frequency (urinating more than 8 times daily), urgency (feeling a strong, sudden need to urinate), retention (inability to empty the bladder despite feeling full), and incontinence (involuntary urine loss). Urinary catheterization is a sterile procedure that inserts a flexible catheter (usually Foley/indwelling catheter or straight catheter) into the bladder via the urethra to drain urine. Catheters are used when a patient cannot void voluntarily (urinary retention, unconsciousness, spinal cord injury), requires accurate output measurement (critical care, post-operative monitoring), or is receiving medications or fluids that necessitate monitoring (diuretics, contrast studies). However, catheterization carries significant risk of urinary tract infection (UTI)—specifically, catheter-associated urinary tract infection (CAUTI)—because the catheter bypasses normal urinary sphincter defenses and provides a pathway for bacterial ascension into the bladder. The longer a catheter remains in place, the greater the CAUTI risk; therefore, remove catheters as soon as clinically possible—this is a key nursing responsibility to prevent infection. The procedure for urinary catheterization: 1. **Verify the order and indication.** Know the type of catheter (indwelling Foley, straight catheter) and size (measured in French, typically 14–18 Fr for adults). 2. **Gather sterile equipment:** sterile gloves, sterile catheter kit (includes catheter, drapes, cleaning solution/swabs, lubricant, sterile gauge, and sterile specimen cup if needed), and a sterile drainage bag (for indwelling catheter) that will be kept below bladder level. Use the smallest appropriate catheter size—larger sizes increase urethral trauma and irritation. 3. **Position the patient:** Female patients supine or in a slight frog-leg position with knees apart, allowing visualization of the urethral meatus. Male patients supine, with the penis at a 45-degree angle or upright. 4. **Perform hand hygiene and don sterile gloves.** Many catheter kits contain sterile gloves; use them. 5. **Cleanse the meatus and surrounding area** using sterile technique. For females, use one gauze/swab per stroke, wiping from the clitoris toward the anus (front to back, away from the urethra) with each swab; use a new swab for each stroke. Do this 3 times to remove debris and bacteria. For males, cleanse the glans in a circular motion, wiping outward; retracting the foreskin if present allows thorough cleansing. 6. **Apply sterile drape** (provided in most kits) to create a sterile field around the meatus. 7. **Lubricate the catheter generously** with sterile lidocaine jelly or water-soluble lubricant (this eases insertion and reduces urethral trauma). Apply lubricant to the distal tip and first few inches of the catheter. 8. **Insert the catheter with steady, gentle pressure.** For females, insert into the urethral meatus (located between the clitoris and vagina, below the clitoris) at a slight downward angle, advancing until urine flows into the collection kit (usually 5–7.5 cm of insertion). For males, insert at the urethral opening (at the tip of the penis) with the penis held upright or at a 45-degree angle; advance slowly and steadily—the male urethra is longer (~17–20 cm)—and the patient may feel resistance as the catheter passes the external sphincter (normal sensation; continue with gentle pressure until urine flows). 9. **Advance the catheter an additional 1 inch** after urine appears to ensure the catheter tip is fully in the bladder (not resting in the urethra). 10. **For indwelling (Foley) catheter only: inflate the balloon** with sterile normal saline (usually 10 mL, though volume depends on the catheter type—follow manufacturer specifications) ONLY AFTER urine has flowed and confirmed the catheter is in the bladder. Never inflate the balloon if urine has not appeared; this indicates the catheter is still in the urethra and inflating would cause severe pain and trauma. Inflation should meet gentle resistance and secure the catheter. 11. **Gently pull back on the catheter** after balloon inflation until resistance is felt—this brings the balloon snugly against the trigone of the bladder, securing the catheter in place. 12. **Connect the catheter to the sterile drainage bag.** Ensure the drainage tubing is secure and the bag is positioned **below the level of the patient's bladder** (hanging from the bed frame, never placed on the bed or chair where it might be compressed). Maintaining the bag below bladder level prevents backflow of urine and bacterial contamination into the bladder—a critical infection-control measure. 13. **Secure the catheter** to the patient's thigh (female) or lower abdomen (male) using tape or a securement device to prevent tension and urethral traction during movement. Allow some slack to avoid pulling on the catheter during position changes. 14. **Verify catheter placement and patency:** urine should flow freely into the drainage bag, and the bag should fill as expected. 15. **Label the catheter insertion date/time** and initial size on tape applied to the catheter or on the drainage bag per facility protocol, so the team knows how long the catheter has been in place (important for tracking CAUTI risk). **Maintaining a closed catheter system** is crucial to prevent infection. A closed system means the catheter, connecting tubing, and drainage bag remain connected and sealed throughout catheterization—no breaks in the system, no opening the drainage bag unless emptying it via the spigot (sampling port). If the system becomes disconnected, use aseptic technique to reconnect or replace the affected component. **Catheter care** (daily, for as long as the catheter is in place): cleanse the meatus and catheter junction area gently with soap and warm water or normal saline (depending on facility protocol) using clean (not necessarily sterile) technique, dry thoroughly, and apply antibiotic ointment per order if indicated. This reduces bacterial colonization at the meatus. **Removing the catheter:** Check the physician's order. For indwelling catheters, deflate the balloon completely by drawing all sterile saline back through the inflation port using a sterile syringe; never cut the inflation port as this may leave balloon material in the bladder. Gently withdraw the catheter; if resistance is felt, stop and notify the physician—do not force. Document the removal time and void within a few hours (per facility protocol), monitor the patient's ability to spontaneously void, and assess post-void residual (PVR) by bladder scan if ordered. A patient should void 200 mL or more within 6–8 hours after catheter removal; if unable to void or PVR >100–150 mL (varies by facility), report to the physician—may indicate urinary retention requiring re-catheterization. **Signs of urinary tract infection (CAUTI):** dysuria (painful urination after catheter removal), frequency, urgency, foul-smelling or cloudy urine, suprapubic pain, fever. Obtain urinalysis and urine culture per protocol and report findings. In the Philippine healthcare context, many patients are hospitalized with limited access to toilet facilities; urinary catheterization must be used judiciously and removed early to prevent CAUTI, which is a major cause of hospital-acquired infection and complications in Philippine tertiary hospitals.

Enteral nutrition (tube feeding) delivers nutritionally complete formula directly into the gastrointestinal tract when a patient cannot eat by mouth but has a functioning digestive system. Common indications include unconsciousness, dysphagia (difficulty swallowing), severe malnutrition requiring supplementation, esophageal obstruction, or conditions requiring bowel rest. Routes include nasogastric (NG) feeding tube, gastrostomy (PEG—percutaneous endoscopic gastrostomy), or jejunostomy. Enteral feeding is preferred over parenteral (intravenous) nutrition because it maintains gut integrity, is less expensive, and has fewer complications; in the Philippine healthcare context, where resources are limited, enteral feeding is the standard approach. The **most critical safety concern with tube feeding is aspiration**—accidental entry of formula or gastric contents into the lungs. Aspiration can occur if the feeding tube is malpositioned (in the esophagus or respiratory tract instead of the stomach or jejunum), if the head of the bed is not elevated, or if gastric distention causes reflux. Aspiration pneumonia is a serious complication with high morbidity and mortality; prevention is essential. **Tube placement verification is the highest-yield safety topic for the NLE.** Before administering any feeding, medication, or water through a tube, you must verify the tube is in the correct location (stomach or jejunum, not respiratory tract or esophagus). The most reliable bedside method combines multiple assessments: 1. **Check gastric aspirate pH.** Using a sterile syringe, withdraw 5–10 mL of fluid from the tube (gastric aspirate). Test the pH using pH paper or meter. Gastric fluid normally has a pH of **≤5 (acidic)** due to hydrochloric acid in the stomach. Respiratory secretions (from lungs) and duodenal secretions have higher pH values (≥6). A pH ≤5 indicates the tube tip is in the stomach. This is the most reliable bedside test but is not foolproof; some medications or feeding formulas can elevate pH, and some respiratory conditions can lower pH. Therefore, use this as one of multiple verification methods, not the only one. 2. **Measure external tube length against the insertion point.** When the NG tube was first inserted, mark the tube at the insertion point (at the nostril, usually with a permanent marker or tape). Measure from this mark to the distal end of the tube; the length should remain constant. If the measured length is now longer (e.g., was 45 cm, now 50 cm), the tube may have been withdrawn slightly or migrated. If shorter, the tube may have been advanced further. Some movement occurs with patient activity, but significant shortening is concerning. 3. **Observe for signs of respiratory distress or coughing** during tube placement and feeding. If the patient coughs, chokes, develops difficulty breathing, or becomes cyanotic, the tube may be in the airway—stop feeding immediately, withdraw the tube, and alert the physician. 4. **X-ray confirmation is the gold standard** for initial NG tube placement, especially after blind insertion. If X-ray is available, obtain a chest and upper abdominal film to visualize the tube position; this definitively confirms gastric or small-bowel placement. X-ray is often done in tertiary hospitals in the Philippines but may not be available in primary health centers. However, for any doubt, it is worth the time and cost to obtain an X-ray rather than risk aspiration. **CRITICAL: Do NOT rely on the old "air insufflation" test** (pushing air down the tube and listening with a stethoscope for a "whoosh" sound over the stomach). This test is no longer recommended because a properly positioned tube in the respiratory tract can also produce a sound, leading to false reassurance. Do not use this test as your sole verification method. **Before every feeding or medication administration, verify tube placement using the combination of pH testing, external tube length measurement, and visual inspection for distress.** This must become a habit—non-negotiable practice. **Positioning to prevent aspiration:** Elevate the **head of bed 30–45 degrees (high-Fowler's or semi-Fowler's position) during feeding and for 30–60 minutes AFTER feeding ends.** This angle uses gravity to assist food moving from the stomach into the small intestine and prevents reflux back into the esophagus and respiratory tract. Even in resource-limited settings without mechanical beds, use pillows to achieve this elevation. Many aspiration pneumonia cases in hospitalized patients occur because the patient was fed while supine or semi-recumbent—a preventable error. **Checking residual volume:** Before each feeding (or per facility protocol, usually every 4 hours for continuous feeding), aspirate gastric contents using a sterile syringe. This volume is called the residual or gastric residual volume (GRV). Measure and record the volume. High residuals (>200 mL in adults, varies by protocol) suggest delayed gastric emptying and increased aspiration risk; hold the feeding and reassess in 30–60 minutes, then recheck. If residuals remain high, notify the physician—may indicate need for gastric motility agents (metoclopramide) or change in feeding plan. If the gastric aspirate appears bile-stained (green/yellow), this may indicate small-bowel reflux and also warrants assessment. For continuous feedings, some facilities check residuals every 4–8 hours; for bolus feedings, check before each bolus. **Feeding administration:** - Administer formula at **room temperature** (cold formula can cause cramping and diarrhea). If refrigerated, allow to warm to room temperature before administration. - Use a **feeding pump** for continuous feedings to ensure steady, controlled rate (e.g., 50 mL/hour). For intermittent bolus feedings, gravity drip is acceptable but slower. - Start feeding at a reduced rate and concentration, gradually increasing over 24–48 hours (e.g., start with ¼ strength at 25 mL/hour, advance to ½ strength at 50 mL/hour, etc.) to allow the gut to adapt and prevent diarrhea and cramping. - Flush the tube with sterile water **before and after each feeding** (20–30 mL for NG tubes, 5–10 mL for small-bore feeding tubes) to maintain patency and prevent clogging. A clogged tube is non-functional and requires replacement, adding cost and discomfort. - If administering medications through the feeding tube, **use liquid formulations when possible**; solid medications must be crushed into powder and mixed with sterile water. **Never crush enteric-coated tablets or sustained-release medications** as this destroys the drug's intended mechanism and can cause adverse effects. If the medication is only available in tablet form and must be given via tube, check with the pharmacist or physician for an alternative liquid formulation or alternative route. - **Flush with water between each medication** to prevent drug interactions and clogging from residual medication. **Monitoring for complications:** - **Diarrhea** is common with tube feeding due to formula osmolality, lactose intolerance, or contaminated formula. Assess stool frequency and consistency, modify feeding rate/concentration, switch formula type if indicated (low-lactose, fiber-containing), and ensure the formula is not contaminated by date-checking and proper storage. - **Dehydration** can occur if fluid intake is inadequate or losses are high (diarrhea, fever, high ambient temperature). Monitor intake and output, provide extra water flushes through the tube, and assess hydration status (mucous membrane moisture, skin turgor, weight trends). - **Hyperglycemia** from the formula's carbohydrate content, especially in diabetic patients. Monitor blood glucose per protocol and report elevated values; may require insulin adjustment. - **Refeeding syndrome** in severely malnourished patients: reintroduction of nutrition after prolonged starvation causes rapid shift of electrolytes (especially phosphate, potassium, magnesium) intracellularly, causing severe hypokalemia and hypophosphatemia with cardiac arrhythmias and muscle weakness. In malnourished patients, increase feeding very gradually, monitor electrolytes closely, and supplement as ordered to prevent this serious complication. **Documentation:** Record the date and time of tube placement, tube size (Fr), location (gastric, small-bowel), method of verification (pH, external length, X-ray), amount of residual (if any), rate and volume of feeding, water flushes, and patient tolerance (any nausea, vomiting, diarrhea, abdominal discomfort, or distention). In the Philippine context, many patients are tube-fed in community-based settings with limited nursing supervision. Teach the patient and family proper technique, when to call for help (fever, vomiting, abdominal pain, difficulty breathing), and how to maintain the tube (daily cleansing around the tube site, checking for blockage, proper storage of formula). Empower patients and families as partners in safe tube feeding.

Nutrition is the intake and utilization of food and nutrients to support bodily functions, growth, and repair. As a nurse, you must understand basic nutritional concepts to assess nutritional status, support healing, and educate patients on therapeutic diets. **Macronutrients** are large nutrient molecules required in substantial quantities: 1. **Carbohydrates** provide rapid energy, yielding 4 kilocalories (kcal) per gram. Carbohydrate sources include grains (rice, bread, pasta), fruits, vegetables, and legumes. In the Philippine context, rice is the primary carbohydrate staple. Complex carbohydrates (whole grains, vegetables) are preferred over simple sugars because they provide sustained energy and fiber. 2. **Proteins** are essential for building and repairing tissues (muscle, skin, immune cells, enzymes), yielding 4 kcal/gram. Protein sources include meat, fish, eggs, beans, legumes, nuts, and dairy products. In the Philippines, legumes (beans, lentils, tofu) and fish are major protein sources, especially in economically disadvantaged populations. A healthy adult requires approximately 0.8 g of protein per kg of ideal body weight daily; this increases with illness, trauma, or wound healing. 3. **Fats** provide concentrated energy at 9 kcal/gram and are essential for absorption of fat-soluble vitamins (A, D, E, K). Sources include oils, butter, nuts, seeds, and fatty fish. While fats are necessary, excessive saturated fat intake is associated with cardiovascular disease; the Philippine Department of Health promotes a balanced fat intake. **Micronutrients** are required in smaller quantities but are vital: 1. **Vitamins** are organic compounds essential for metabolism, immunity, and tissue health. Fat-soluble vitamins (A, D, E, K) require dietary fat for absorption and are stored in body fat; water-soluble vitamins (B-complex, C) are not stored and must be consumed regularly. Vitamin C is essential for collagen synthesis (wound healing); vitamin B12 and folate are needed for DNA synthesis and cell division; vitamin D regulates calcium absorption. 2. **Minerals** are inorganic elements crucial for bone health (calcium, phosphorus), oxygen transport (iron), thyroid function (iodine), and countless enzymatic reactions. In the Philippines, iron deficiency and iodine deficiency are public health concerns, particularly in rural areas; the DOH promotes iodized salt and iron-fortified foods. **Nutritional assessment** begins with a history: - **Weight and height:** calculate BMI (weight in kg ÷ height in meters²). Normal BMI is 18.5–24.9; <18.5 is underweight, 25–29.9 is overweight, ≥30 is obese. - **Recent weight change:** unintentional weight loss (>5% in 1 month or >10% in 6 months) indicates malnutrition. - **Usual dietary intake:** 24-hour diet recall, favorite/disliked foods, cultural food preferences. - **Appetite and swallowing:** ability to chew and swallow, nausea, early satiety, difficulty eating. - **Gastrointestinal function:** diarrhea, constipation, malabsorption. - **Medical conditions affecting nutrition:** diabetes, kidney disease, liver disease, cancer, HIV/AIDS. - **Medications** that affect appetite or absorption. **Laboratory indicators of nutritional status:** - **Serum albumin** (normal >3.5 g/dL): reflects visceral protein status; albumin has a 20-day half-life, so it reflects nutritional status over weeks. Low albumin may indicate malnutrition or liver disease. - **Prealbumin** (transthyretin) (normal 20–40 mg/dL): a more sensitive marker of short-term protein status because it has a 2–3 day half-life; drops quickly with malnutrition and rises quickly with refeeding. - **Total lymphocyte count:** low counts reflect impaired immune function from malnutrition. - **Hemoglobin and hematocrit:** assess for anemia (may be from iron, B12, or folate deficiency). **Nursing support for nutrition:** 1. **Assess nutritional risk** at admission and regularly during hospitalization. Patients at high risk include the elderly, those with chronic diseases, those with recent weight loss, and those on restricted diets. 2. **Assist with eating** if the patient is weak, visually impaired, or has limited mobility. Set up the environment: remove unpleasant odors, ensure good lighting, position the patient upright (high-Fowler's) to ease swallowing, and remove distracting noise if possible. Encourage the patient to eat at their own pace; never rush. Offer small, frequent meals if the patient has poor appetite rather than three large meals. 3. **Respect cultural food preferences** whenever possible. In the Philippines, teach patients and families to prepare traditional Filipino meals that meet therapeutic diet requirements (e.g., prepare a low-sodium version of their favorite dish, use more vegetables and fish, less salt and MSG). Culturally sensitive nutrition advice is more likely to be followed. 4. **Promote wound healing** through protein, vitamin C, and zinc intake. Protein is essential for collagen synthesis (the major structural protein in wounds). Vitamin C (found in citrus fruits, tomatoes, leafy greens) is a cofactor in collagen cross-linking and is essential for strong, durable scar tissue. Zinc (found in meat, seafood, legumes, seeds) is needed for cell proliferation and immune function at the wound site. Post-operative and trauma patients require increased protein (up to 1.2–1.5 g/kg/day) and vitamin C (200–500 mg daily); ensure these are incorporated into the diet or supplemented. 5. **Teach therapeutic diets** as ordered: - **Low-sodium diet** (<2 g/day): for hypertension, heart failure, kidney disease. Teach patients to avoid processed foods (high in added salt), canned goods (unless low-sodium), fast food, and to use herbs and spices instead of salt for flavoring. - **Diabetic/carbohydrate-controlled diet:** emphasize whole grains, lean proteins, healthy fats, and limited simple sugars. In the Philippine context, teach substitution of white rice with brown rice or portions control, choosing fish over processed meats, and limiting sweet beverages and desserts. Support the use of Filipino food-portion guides. - **Renal diet** (for kidney disease): often low in potassium, phosphorus, and sodium to reduce kidney workload. Limit bananas, beans, dark leafy greens (high potassium); limit dairy and processed meats (high phosphorus); limit salt. - **High-fiber diet:** for constipation, to promote regular bowel movements. Increase vegetables, fruits, whole grains, beans over time (fiber increase too rapidly can cause bloating and cramping). 6. **Use the Pinggang Pinoy model** (Filipino food plate) in the Philippines as a visual guide: one-half the plate is vegetables and fruits (fiber, vitamins, minerals), one-quarter is lean proteins (meat, fish, beans, eggs), one-quarter is carbohydrates (rice, whole grains), with a small amount of healthy fats and limited salt/sugar. This model is familiar to Filipino patients and aligns with DOH guidelines. 7. **Monitor intake and output,** appetite, and weight trends. Report significant changes to the physician. 8. **Advocate for patients** with special dietary needs. If a patient is not eating (due to poor appetite, food dislike, or limited mobility), communicate with the nutrition service to explore alternatives, supplements, or changes to the meal plan.

Nasogastric (NG) tube insertion is a common nursing procedure used to deliver nutrition, medications, or to decompress the stomach (remove air/gastric contents). Understanding the anatomical landmarks and proper technique ensures safe, successful insertion and prevents serious complications. **Measuring the tube (NEX method):** Before insertion, measure the tube to estimate the depth of insertion. Use the **NEX method**: measure from the tip of the **N**ose (tip of nares) to the **E**arlobe (top of the earlobe) to the **X**iphoid process (bottom of the sternum). Mark this point on the tube with a permanent marker or tape—this is the predicted depth to the stomach in an average adult (usually 50–60 cm). Some sources use **NEMU method** (**N**ose-**E**arlobe-**M**id-**U**mbilicus), which may be slightly longer; follow your facility's standard. **Patient preparation:** 1. Explain the procedure in simple terms ("We're going to pass a small tube through your nose into your stomach to deliver nutrition") and why it's needed. Allow the patient to ask questions and express concerns. 2. Position the patient in **high-Fowler's position** (upright) with a pillow behind the back for comfort and safety. Upright position reduces the risk of aspiration if the tube inadvertently enters the airway and allows gravity to assist insertion. 3. Have the patient sit quietly for a few minutes to calm any anxiety. **Insertion technique:** 1. **Don gloves** (clean technique is acceptable for NG insertion, though some facilities use sterile gloves) and gather all equipment: NG tube (typically #16–18 French for adults), water-soluble lubricant, paper tape, stethoscope, cup of water, tissues (patient will drool and may have tears), and a sterile cup or syringe for specimen collection. 2. **Assess both nares** for patency. Ask the patient to close their mouth and breathe through each nostril. Choose the more patent nostril for insertion. Avoid insertion if there is a nasal obstruction, deviated septum, or recent nasal trauma. 3. **Lubricate the tube generously** with water-soluble lubricant (e.g., K-Y jelly) for ~6 inches from the tip. This reduces friction and patient discomfort. Do not use petroleum jelly, which is not water-soluble and can cause lipoid pneumonia if aspirated. 4. **Instruct the patient to flex the head forward** so that the chin moves toward the chest. This position elevates the larynx and closes off the airway, directing the tube toward the esophagus. Some sources say "tip your chin to your chest." 5. **Insert the tube gently through the chosen nostril**, following the natural anatomy of the nose (angled slightly downward and backward, parallel to the palate, not perpendicular). The tube will pass through the nose, nasopharynx, and into the oropharynx. 6. **As the tube reaches the pharynx**, the patient will typically feel the urge to gag (this is normal and expected). Encourage the patient to relax and breathe through the mouth. Some patients find it helpful to focus on a specific point or to hum (vibration can ease passage). Offer small sips of water if allowed; swallowing helps propel the tube down the esophagus. 7. **Continue advancing the tube slowly and gently** until you've reached the marked NEX measurement (the insertion point marked on the tube). This usually means advancing about 50–60 cm in an adult. Most of the tube will now be inside the patient. 8. **If the patient coughs, chokes, gasps, or develops difficulty breathing or cyanosis**, the tube may have entered the airway (trachea) instead of the esophagus. **STOP immediately, withdraw the tube completely, and allow the patient to recover.** Do not force the tube deeper. After the patient has rested and recovered (usually 1–2 minutes), reassess and attempt insertion again if appropriate. This is a critical safety step. 9. **After advancing to the marked depth, verify placement** (see tube placement verification section above) before administering any feeding or medication. **Securing the tube:** Once placement is verified, secure the tube to prevent displacement and pressure on the nares: - **Anchor to the nose:** Use paper tape, foam tape, or a commercial tube securement device to secure the tube to the side of the nose (not across the bridge, which can cause necrosis of the nasal septum). Ensure the tube does not pull tightly; allow slight slack. - **Mark the insertion point:** Use a permanent marker to mark the point where the tube exits the nose (on the tube itself). This creates a visual reference to detect migration. If the mark moves, the tube has shifted and requires re-verification before use. - **Label:** Document the date and time of insertion, tube size (Fr), and expected length (e.g., "NG #16 Fr, NEX 55 cm, inserted 0900 by RN Jane Doe") on the tube tape or on the patient record. **Ongoing management:** - **Daily assessment:** inspect the nares for redness, pressure ulcers, or drainage. Provide nasal care by gently cleaning the nares with a damp cloth and applying antibiotic ointment per facility protocol. - **Tube patency:** flush with sterile water before and after feedings and medications to prevent clogging. A clogged tube requires reinsertion, adding cost and discomfort. - **Head of bed elevation:** maintain ≥30 degrees during feeding and for 30–60 minutes after to prevent aspiration. - **Monitor for complications** (see below). **Complications of NG tube insertion:** 1. **Airway placement** (tube in trachea instead of esophagus): the most dangerous complication, with risk of aspiration and pneumonia. Signs include coughing, choking, dyspnea, cyanosis. Withdraw immediately and reposition. 2. **Sinusitis:** prolonged NG tube use can obstruct sinus drainage and lead to bacterial infection. Signs include facial pressure, headache, fever, thick nasal discharge. Drainage may become apparent as tube is removed. 3. **Nasal erosion/necrosis:** pressure from the tube, especially if too tight, can erode the nasal septum or nares. Prevention: secure loosely, assess nares daily, rotate nares if long-term tube use (>4–6 weeks). 4. **Esophageal perforation:** rare, usually from forced or multiple traumatic insertions. Signs include chest pain, subcutaneous emphysema, fever, sepsis. This is a surgical emergency. 5. **Gastric ulceration/bleeding:** prolonged tube contact can irritate the gastric mucosa. Monitor for hemoccult-positive gastric aspirate. 6. **Tube migration:** tube can migrate upward (out of the stomach into the esophagus) or downward (into the duodenum or beyond). Requires verification before each use. **In the Philippine healthcare context:** NG tube insertion is a basic procedure performed by nurses in rural health centers, provincial hospitals, and tertiary institutions. Emphasize meticulous technique, especially airway safety, because once a tube is malpositioned and feeding is started, aspiration pneumonia can develop rapidly. In settings without X-ray capability for verification, rely on clinical assessment (no distress, correct depth, pH testing of aspirate) and always ask the patient: "Can you breathe normally? Any choking feeling?" If any doubt about placement, transfer the patient to a facility with X-ray capability before starting feeding.

Fluid balance—the equality of fluid intake and output—is essential for maintaining electrolyte balance, cardiovascular stability, renal perfusion, and cellular function. The body's thirst mechanism and kidneys normally regulate fluid balance automatically; however, illness, medications, or injuries can disrupt this balance, requiring nursing monitoring and intervention. **Normal fluid balance:** In a healthy adult, total body water is about 50–60% of body weight. Daily fluid intake (from beverages, food, and metabolic sources) should roughly equal daily output (urine, feces, insensible losses via respiration and perspiration). A typical healthy adult's balance is approximately 2,000–2,500 mL intake and 2,000–2,500 mL output per 24 hours. **Recording intake:** - **Oral intake:** all fluids taken by mouth (water, juice, tea, broth, milk, ice cream—ice melts to ~half its volume of fluid, so 100 mL of ice ≈ 50 mL of fluid), and foods with high water content (soup, gelatin, popsicles). - **Tube feeding:** all formula administered via NG, PEG, or jejunostomy tube. - **Intravenous fluids:** all IV solutions, including maintenance fluids, boluses, and medications in fluid. - **Irrigants:** fluid used to irrigate tubes (urinary catheter, nasogastric tube) that is NOT withdrawn is recorded as intake; however, fluid that is withdrawn (e.g., aspirated from the stomach) is not intake—it is an internal movement of fluid. **Recording output:** - **Urine:** measure and record all urine volumes. Encourage the patient to use a bedpan or commode for measurement; if the patient uses the toilet and cannot measure, document as "urinated, amount not measured" or "qs" (quantum sufficit = sufficient quantity). - **Emesis (vomiting):** record volume and character (clear, green/bilious, blood-tinged, fecal—which may indicate bowel obstruction). - **Diarrhea:** if copious, attempt to measure; if only a few loose stools, document descriptively ("3 loose stools"). - **Drainage from tubes or wounds:** Jackson-Pratt drain, Penrose drain, chest tubes, abdominal drains—measure and record the volume and character of drainage. - **Significant blood loss:** from wounds, surgery, or hemorrhage. - **Insensible losses:** these are losses not directly measured (respiration, perspiration, diaphoresis). They are estimated (typically 500–800 mL/day in an afebrile patient at rest; increase with fever, hyperventilation, heat, or physical activity). **Calculating fluid balance:** Fluid balance = Total Intake – Total Output Example: A patient has: - Intake: 1,500 mL oral fluids + 500 mL IV fluids + 250 mL NG tube feeding + 100 mL in foods = 2,350 mL - Output: 1,200 mL urine + 150 mL vomiting + 200 mL diarrhea = 1,550 mL - Balance: 2,350 – 1,550 = +800 mL (positive balance, fluid retained—patient is overloaded) A positive balance (intake > output) indicates fluid retention (overload), and a negative balance (output > intake) indicates fluid loss (deficit). **Fluid volume deficit (dehydration):** Characteristics include: - Subjective: thirst, weakness, dizziness - Objective: dry mucous membranes, decreased skin turgor (skin returns slowly to normal after pinching), sunken fontanel in infants, weight loss (1 kg ≈ 1 L fluid), concentrated urine (dark color, high osmolality), tachycardia, **hypotension** (late sign), decreased mental acuity - Lab findings: elevated BUN, elevated creatinine, elevated electrolytes (hypernatremia), elevated hemoglobin/hematocrit (hemoconcentration) Nursing interventions: increase fluid intake (oral, IV, or tube feeding), monitor intake/output closely, assess hydration status regularly, provide frequent mouth care, and monitor vital signs. Use ORS (oral rehydration solution) in patients with diarrhea, as it provides water and electrolytes. **Fluid volume overload:** Characteristics include: - Subjective: difficulty breathing, shortness of breath - Objective: **crackles** (rales) in lungs on auscultation (sign of pulmonary edema), **distended neck veins** (JVD), **edema** (puffiness in dependent areas: legs in ambulatory patient, sacral area in bed-bound patient), weight gain (1 kg ≈ 1 L), elevated blood pressure - Lab findings: diluted electrolytes (hyponatremia), decreased hemoglobin/hematocrit (hemodilution) Nursing interventions: restrict fluid intake and sodium (per physician order and condition—heart failure, renal disease, cirrhosis all require fluid/sodium restriction), administer diuretics as ordered, monitor intake/output carefully, assess lung sounds and peripheral edema regularly, and monitor weight trends. Position upright (high-Fowler's) if dyspneic to ease breathing. **Daily weight as the most accurate fluid indicator:** **Daily weight is the most sensitive, accurate indicator of fluid balance.** One kilogram (1 kg ≈ 2.2 lbs) of weight change ≈ approximately 1 liter (1 L) of fluid gain or loss. To ensure accuracy: - Weigh the patient at the **same time each day** (preferably early morning before breakfast and after voiding). - Use the **same scale** (different scales may vary in calibration). - Have the patient wear **similar clothing** each time (remove excess layers). - Document weight and compare to previous day and baseline. Example: Patient admitted weighing 70 kg. Next morning's weight is 71.5 kg—a 1.5 kg gain overnight suggests fluid retention (overload), approximately 1.5 L of fluid gained. If the patient is on a diuretic for heart failure, you'd expect weight to decrease; if it's increasing, inform the physician—diuretic may need adjustment, or additional fluid restriction may be needed. **Assessment frequency:** I&O monitoring is ordered by the physician and frequency depends on the patient's condition. In critical care, continuous monitoring. In acute medical/surgical units, typically every 8–12 hours or per shift. In stable patients, daily. Patients with conditions affecting fluid balance (heart failure, kidney disease, diarrhea) require more frequent assessment. **Documentation:** Record intake and output on the I&O record (bedside flowchart) and on the patient's chart. Include the time, type of fluid, and volume. Total intake and output at the end of each shift or 24-hour period. Calculate and record the balance. **In the Philippine healthcare context:** Many rural facilities do not have precise measuring devices (graduated pitchers, bedpans with measurement markings). Teach patients and families to use household measures: a typical glass of water ≈ 250 mL, a cup ≈ 200 mL, a bowl of soup ≈ 300 mL. Estimation is better than no measurement at all, and it empowers patients and families to participate in monitoring.

A wound is a disruption in the continuity of skin or underlying tissues. Wound healing is a complex biologic process that restores tissue integrity and involves hemostasis, inflammation, proliferation, and remodeling. Understanding wound healing phases and nursing interventions is essential for supporting recovery and preventing complications. **Classification of wound healing:** 1. **Primary intention (primary closure):** Surgical incisions or clean wounds with minimal tissue loss and edges brought together (approximated) heal primarily. The wound closure is tight, blood loss is minimal, and healing is rapid (typically 2–3 weeks for skin closure, longer for deeper structures). Sutures or staples hold the edges in place. 2. **Secondary intention (healing by granulation):** Open wounds (no closure of edges) or wounds with tissue loss (burn, ulcer, infection) heal by filling in from the base upward. The body produces granulation tissue (rich in blood vessels and collagen) to fill the defect; epithelialization occurs over weeks to months. These wounds have greater scarring and take longer to heal than primary-closure wounds. 3. **Tertiary intention (delayed closure):** A contaminated or heavily infected wound is initially left open, treated to reduce infection, and then closed surgically once it is clean. This combines elements of secondary healing (open healing initially) followed by primary closure. **Phases of wound healing** (occur overlapping, not strictly sequential): 1. **Hemostasis (0–15 minutes):** Blood clotting stops bleeding. Platelets aggregate, coagulation cascade activates, and a fibrin clot forms. 2. **Inflammatory phase (0–3 days, continues up to 5 days):** Vasoconstriction followed by vasodilation increases blood flow (causing redness/erythema). White blood cells (particularly neutrophils, then macrophages) migrate to the wound to remove debris and bacteria. Histamine and cytokines are released, causing swelling (edema). Fluid exudate is normal in this phase. 3. **Proliferative phase (3–21 days):** Fibroblasts (specialized cells) synthesize collagen, the primary structural protein. Angiogenesis (new blood vessel formation) restores blood supply. Epithelial cells migrate from wound edges inward. Granulation tissue (appears beefy red, moist, bumpy) fills the wound. This is the phase where the wound gains strength. 4. **Maturation/remodeling phase (weeks to months to years):** Collagen is reorganized and strengthened through cross-linking (a process requiring vitamin C). Wound strength increases; eventually, a healed wound reaches ~70–80% of original tissue strength even after complete healing. Scar tissue is remodeled; initially pink/purple and raised, scars fade and flatten over time. **Assessment of wounds:** Regularly assess wounds for size, depth, color of wound bed, exudate, odor, and condition of surrounding skin: 1. **Size and depth:** Measure length and width in centimeters (use a ruler or measuring tape on the wound bed, not on surrounding skin). Depth indicates how far the wound extends—superficial (partial-thickness, dermis only) vs. deep (full-thickness, into subcutaneous tissue or deeper). Trace the perimeter on transparent dressing or paper to visually track changes over time. 2. **Wound bed color:** - **Red/pink:** healthy granulation tissue; appears moist, bumpy; indicates healing is progressing; continue current care. - **Yellow/tan:** slough (dead tissue); may be adherent or loose; removal (debridement) may be needed to promote healing. - **Black:** eschar (necrotic, dead tissue); hard and dry; indicates severe tissue death; removal is essential (surgical or enzymatic debridement). - **Green or purple:** indicates infection (green Pseudomonas, purple suggests fungal); culture the wound and initiate antibiotic therapy. 3. **Exudate (drainage):** - **Serous:** clear, pale yellow—normal, especially in early inflammatory phase. - **Sanguineous:** blood-tinged or red—normal in early healing; persistent heavy bleeding warrants assessment. - **Serosanguineous:** clear with red tint—normal and common. - **Purulent:** thick, yellow, green, or brown—indicates infection; culture and antibiotics needed. - **Assess volume:** small amount (0–5 mL)?, moderate (5–30 mL)?, large/copious (>30 mL)? Excessive exudate can macerate skin and promote bacteria. 4. **Odor:** A foul, malodorous wound suggests infection; offensive odor may also indicate necrotic tissue. Culture and assess for infection. (Note: odor can also be from anaerobic bacteria or fungal infection.) 5. **Surrounding skin:** Erythema (redness) immediately around the wound edge (0–5 mm) is normal inflammation; erythema extending >5 mm suggests cellulitis (spreading infection). Edema (swelling) around the wound is normal in early healing; excessive edema requires assessment. Skin breakdown around the wound (maceration) indicates too much moisture; reduce exudate or change dressing more frequently. Skin irritation or allergic reactions to dressing materials require dressing change and assessment for contact dermatitis. **Nursing management to promote wound healing:** 1. **Maintain moist wound environment:** Contrary to old "let it air dry" advice, research shows moist wounds heal faster than dry wounds. Use appropriate dressings (gauze moistened with saline, foam dressings, alginate, hydrogel) to keep the wound bed moist but not overly wet. Excessive moisture promotes bacterial growth; balance is key. 2. **Cleanse the wound appropriately:** - Use **normal saline** (0.9% sodium chloride) or sterile water as the cleansing solution. Saline is isotonic and non-cytotoxic to healing tissues. - Avoid harsh agents like povidone-iodine (Betadine), hydrogen peroxide, or acetic acid (vinegar) on clean, healing wounds—these are cytotoxic and damage healthy granulation tissue. Use them only for infected or heavily contaminated wounds, then switch to saline once cleaned. - When cleansing, work from the **least contaminated to the most contaminated area** (clean to dirty), or from the **center of the wound outward** (or from the incision outward in surgical wounds) to avoid introducing bacteria into clean areas. Use a new gauze or swab for each stroke. - Gently irrigate (do not scrub vigorously, which traumatizes the wound). 3. **Manage infection:** - Assess for signs of infection: increasing redness, warmth, swelling, purulent drainage, foul odor, fever, elevated WBC. - Obtain a wound culture (swab or fluid) if infection is suspected; send for bacterial and sensitivity testing to guide antibiotic selection. - Administer antibiotics as ordered. - Perform frequent dressing changes (may be 2–4 times daily for infected wounds) to promote drainage and aeration. 4. **Support systemic healing:** - **Protein:** Essential for collagen synthesis; ensure adequate intake (1.2–1.5 g/kg/day in post-operative or trauma patients). Include lean meats, fish, eggs, beans, dairy in the diet. - **Vitamin C (ascorbic acid):** Critical cofactor in collagen cross-linking; ensure 200–500 mg daily (citrus fruits, tomatoes, leafy greens, peppers). Post-operative patients may benefit from vitamin C supplementation if intake is low. - **Zinc:** Essential for cell proliferation and immune function; ensure adequate intake (15 mg daily—meat, seafood, legumes, nuts, seeds). Zinc deficiency impairs wound healing; supplementation may be ordered in malnourished patients. - **Other nutrients:** Adequate carbohydrates for energy, iron for oxygen transport, and B vitamins for metabolism. 5. **Promote adequate perfusion:** Ensure cardiovascular stability, oxygen delivery, and blood flow to the wound. Pressure ulcers develop where blood supply is compromised; maintain frequent position changes, use pressure-relieving devices (cushions, mattresses), and ensure good nutrition and hydration. 6. **Dressing changes and sterile technique:** - Change dressings per physician order or facility protocol (typically every 48 hours for clean wounds, more frequently for infected or highly exudative wounds). - Use **sterile aseptic technique** for surgical wounds and infected wounds; **clean technique** is acceptable for chronic wounds in stable patients at home. - Remove old dressing gently (may soak in saline if adherent to avoid trauma). - Cleanse the wound per protocol. - Apply new sterile dressing, securing with tape that does not irritate the skin (hypoallergenic tape preferred). - Document: date/time of dressing change, wound appearance (size, color, exudate, odor, surrounding skin), pain level, and patient tolerance. 7. **Pain management:** Wound care (cleansing, dressing changes) can be painful. Administer analgesics 15–30 minutes before dressing changes if ordered, use gentle technique, and provide emotional support. **Wound complications:** 1. **Infection:** Cellulitis (bacterial infection of surrounding tissue), abscess (localized collection of pus), or sepsis (systemic infection). Prevent with asepsis, maintain wound cleanliness, remove dead tissue. Treat with antibiotics and possible drainage. 2. **Dehiscence:** Separation of wound edges after surgery. Appears as gap between previously closed edges or "opening up" of the incision. Seen in post-operative days 5–10, often from tension on the suture line, infection, or malnutrition. Patient may report feeling something "pop" or notice drainage. Assess if edges are separated completely (full dehiscence) or partially. Notify the physician; the wound may require re-closure or healing by secondary intention. Keep the patient on bed rest and restrict activity to prevent further separation. 3. **Evisceration:** **Protrusion of internal organs (intestines, organs) through the separated incision.** This is a **SURGICAL EMERGENCY** and requires immediate action: - **Stop all activity; keep the patient still in a low-Fowler's position with knees bent** (relaxes abdominal muscles and reduces tension on the incision). - **DO NOT attempt to reinsert the organs.** This causes further contamination and injury. - **Cover the protruding organs with a sterile saline-moistened dressing or sterile saline-soaked gauze.** Keep the dressing moist to prevent tissue drying. - **Keep the patient NPO** (nothing by mouth). - **Notify the surgeon immediately.** Evisceration requires emergency surgery to return organs to the abdomen and repair the incision. - **Document the time, appearance of organs, interventions taken, and physician notification.** This complication is rare but catastrophic if mismanaged; it is a high-yield NLE topic. 4. **Excessive scarring:** Hypertrophic scars (thick, raised, within wound boundaries) or keloid scars (extend beyond original wound boundaries; more common in darker-skinned individuals and in certain body areas). Can be cosmetically unappealing or functionally limiting if over joints. Prevent with appropriate wound management; treat with pressure garments, silicone sheets, or surgical revision if needed. **Drain management:** Surgical drains (Jackson-Pratt, Penrose) remove fluid from the surgical site, preventing fluid accumulation. Assess drains: - **Character and volume** of drainage (serous, sanguineous, purulent). - **Patency:** ensure the drain is not kinked or occluded. - **Surrounding skin:** assess for redness or irritation. Empty the drain using sterile technique, record the volume and character, and document. The drain is typically removed when drainage is minimal (<25 mL per 24 hours) per physician order. **In the Philippine healthcare context:** Many rural patients have limited access to specialized wound care (negative pressure therapy, advanced biologics, etc.). Focus on basic principles: keeping wounds clean and moist, preventing infection through asepsis and hygiene, ensuring adequate nutrition, and recognizing complications early. Community health workers and family caregivers can be trained in basic wound care, making sophisticated healing achievable even in resource-limited settings.