Midwife Licensure Exam Fundamentals of Care & the Health-Care Process — Vital Signs & Basic Physiologic MonitoringStudy Notes

Vital signs are objective measurements of the body's fundamental physiologic parameters that indicate the patient's general health status and the functioning of major organ systems. They are called 'vital' because abnormalities often signal serious illness or deterioration requiring immediate intervention. In the Philippine healthcare context, vital signs monitoring is a core competency at all NCM levels—from basic patient care (NCM I) through community health assessment (NCM III)—and forms the foundation for clinical decision-making in hospital, clinic, and community settings. The nurse's responsibility, as defined in RA 9173, includes not only accurate measurement but also critical interpretation and timely reporting to the physician or health team. The five vital signs are: (1) temperature (reflecting metabolic and regulatory function), (2) pulse rate and character (reflecting cardiac output and perfusion), (3) respiration rate, depth, and pattern (reflecting oxygenation and CO₂ elimination), (4) blood pressure (reflecting vascular resistance and cardiac function), and (5) pain (reflecting tissue damage, inflammation, or dysfunction). Assessment of vital signs occurs on admission, at routine intervals per facility protocol, before and after procedures, and whenever a patient's condition changes. Trending vital signs over time—watching for patterns of increase or decrease—is often more clinically significant than a single reading.

Temperature reflects the balance between heat produced (through metabolism and muscle activity) and heat lost (through radiation, conduction, convection, and evaporation), regulated by the hypothalamus. The hypothalamus acts as the body's 'thermostat,' setting a normal set point around 37°C. When infection, inflammation, or other causes raise the set point, the body initiates heat production (shivering, vasoconstriction) until core temperature reaches the new (elevated) set point—this is fever or pyrexia. Accurate temperature measurement is essential because fever indicates infection or inflammation and triggers nursing interventions and medication administration. Temperature can be measured via multiple routes, each with specific advantages and limitations: (1) **Oral** (most common, non-invasive, ~36.5–37.5°C average 37.0°C)—contraindicated in patients unable to keep mouth closed, those with oral surgery/trauma, mouth breathers, or those receiving hot/cold liquids within 15 minutes. (2) **Rectal** (most accurate core temperature, ~0.5°C higher than oral, ~36.5–37.5°C becoming 37.0–38.0°C)—used when oral is contraindicated but avoided in immunocompromised patients, recent rectal surgery, diarrhea, or if patient refuses; requires lubrication and gentle insertion ~1.5 inches. (3) **Axillary** (safest, least invasive, ~0.5°C lower than oral, ~36.0–37.0°C)—preferred in infants and young children but less accurate; requires placement of thermometer in the axilla for 3–5 minutes with arm held against the chest. (4) **Tympanic (temporal artery)** (quick, non-invasive, approximates core temperature)—affected by cerumen impaction or otitis media; temporal readings require sweeping across the forehead in a specific pattern. The **fever phases** describe the febrile response and guide nursing care: In the **chill (onset) phase**, the hypothalamic set point rises; the patient feels cold despite elevated core temperature. The body conserves heat through vasoconstriction, shivering ('goosebumps'), and behavioral responses (pulling blankets). Nursing action: provide warmth, blankets, and reassurance; avoid tepid sponging (causes shivering and vasoconstriction, counterproductive). In the **plateau (course) phase**, the core temperature has reached the new set point; the patient feels warm and flushed, skin is warm and dry, the patient may report thirst, malaise, or headache. Nursing action: remove excess covers, provide a cool (not cold) environment, ensure adequate fluid intake, and monitor comfort. In the **flush (defervescence/crisis) phase**, the set point returns toward normal; the core temperature now exceeds the set point, triggering heat loss. The patient experiences profuse sweating (diaphoresis), the skin becomes warm and flushed, and the patient may report feeling hot. Nursing action: provide dry clothing and bedding, continue fluids to replace those lost in sweat, and monitor for dehydration or orthostatic hypotension. **Hyperthermia** (high fever) presents risks: **hyperpyrexia** (fever >41°C) can cause febrile seizures (especially in children <5 years old), delirium, dehydration, and potential thermoregulatory failure. **Hypothermia** (core temperature <35°C) impairs metabolism, cardiac function, and consciousness; severe hypothermia risks fatal dysrhythmias. **Antipyretic therapy** uses paracetamol (acetaminophen) or NSAIDs (ibuprofen, aspirin) to lower the set point, allowing the body to dissipate excess heat. **Paracetamol** is first-line: typical dose is 500 mg–1 g every 4–6 hours, with a maximum of 4 g/day in adults (lower maximum of 2–3 g/day is recommended in hepatic impairment or in elderly/low-weight patients). Physical cooling (tepid sponging, cool packs) is **adjunctive**, not primary, and should never replace pharmacologic management or precede it without medical order. Always avoid cold water or alcohol-based sponging because these cause peripheral vasoconstriction and shivering, actually raising core temperature. **Nursing management summary**: Assess temperature and document route; monitor fever trends; provide comfort measures during each phase; ensure adequate hydration; administer antipyretics as prescribed; monitor for complications (seizures, dehydration, delirium); and provide patient/family education about fever management.

The pulse reflects the heart's contractions as they send a pressure wave through the arteries. Pulse assessment provides information about heart rate, rhythm, force (amplitude/volume), and vessel elasticity. The most commonly assessed site is the **radial pulse** (thumb side of the inner wrist, over the radial artery), which is convenient and accessible. The **apical pulse** (located at the 5th intercostal space along the left midclavicular line, where the left ventricle's apical beat is felt) is the most accurate and is essential for assessing infants, patients with irregular rhythms, and before administering cardiac medications (especially **digoxin**). Other pulse sites used for assessment include the temporal (temple), carotid (neck—never palpate both simultaneously due to risk of decreased cerebral blood flow), brachial (inner elbow, used for BP cuff placement and in infants), femoral (groin), popliteal (behind the knee), posterior tibial (inner ankle), and dorsalis pedis (top of the foot). **Normal adult pulse rate** is 60–100 beats per minute (bpm). Rates vary with age: newborns have 120–160 bpm, and rates decrease toward adult values as children grow. **Tachycardia** is a heart rate >100 bpm (adult); causes include fever (approximately 10 bpm increase per 1°C), anxiety, pain, exercise, hyperthyroidism, anemia, shock, or medications like epinephrine. **Bradycardia** is a heart rate <60 bpm; causes include athletic training (athletes may have resting rates of 40–60 bpm), hypothyroidism, beta-blocker medications, increased intracranial pressure, or sick sinus syndrome. **Pulse rhythm** should be regular; an irregular rhythm is called **arrhythmia** or **dysrhythmia** and requires further investigation (ECG). **Pulse volume/amplitude** is graded on a scale: 0 (absent), 1+ (weak or thready), 2+ (normal), 3+ (bounding/full). A **pulse deficit** occurs when the apical pulse rate exceeds the radial pulse rate, indicating that some cardiac contractions are not strong enough to create a palpable peripheral pulse—this requires concurrent assessment by two nurses counting apical and radial pulses simultaneously for one full minute. **Critical digoxin rule**: **HOLD digoxin and notify the physician if the apical pulse is <60 bpm in an adult** (or <90–100 bpm in an infant, per facility policy). Digoxin is a cardiac glycoside that increases the force of cardiac contraction (positive inotrope) but slows the heart rate (negative chronotrope). An excessively slow pulse indicates digoxin toxicity risk. **Always count the apical pulse for one full minute before administering digoxin**—do not rely on a 15- or 30-second count, as the irregularity characteristic of some patients taking digoxin requires a full-minute assessment. To assess the radial pulse: position the patient with arm relaxed, place your index and middle fingers on the radial artery (thumb side of the inner wrist, avoiding the thumb itself which has its own pulse), apply gentle pressure until you feel the pulse, and count for 30 seconds then multiply by 2 if the rhythm is regular, or count for a full minute if irregular. To assess the apical pulse: position the patient supine or sitting upright, locate the 5th intercostal space (at the level of the nipple) and move medially to the midclavicular line, place your stethoscope's diaphragm here, and listen for the 'lub-dub' sound, counting each 'lub-dub' as one beat for a full minute. **Factors influencing pulse rate** include age (decreases with age), sex (slightly faster in females), exercise (elevates acutely), stress and emotion (elevates), fever (increases ~10 bpm per 1°C), medications (beta-blockers lower it; epinephrine, stimulants, and some antiarrhythmics raise it), hemorrhage (elevates as the body tries to maintain perfusion), position changes (may elevate when moving from lying to standing), and underlying respiratory or cardiac disease. In the emergency setting, when assessing for a pulse in a potentially pulseless patient during cardiac arrest, the nurse palpates the **carotid pulse** in adults and the **brachial pulse** in infants; if no pulse is felt within 10 seconds, chest compressions begin immediately.

Respiration is the exchange of oxygen and carbon dioxide at the alveolar level and includes both the mechanics of breathing (ventilation) and the diffusion of gases. The respiratory rate (RR) counts the number of breaths per minute; one breath = one inspiration + one expiration. Assessing respiration requires observing the **rate, depth, and pattern/rhythm**. **Normal adult respiration** is 12–20 breaths per minute; newborns breathe 30–60 times per minute, and rates slow gradually toward adult values. The nurse should count respirations **discreetly and without the patient's awareness** because conscious patients often unconsciously alter their breathing pattern if they know it is being assessed. Best practice: count respirations immediately after assessing the radial pulse—keep your fingers on the radial artery or your hand on the patient's wrist to make it appear you are still counting the pulse, then shift your attention to observing the rise and fall of the chest. Count for 30 seconds and multiply by 2 if the rhythm is regular; count for a full minute if the rhythm is irregular or if the rate appears abnormal. **Depth of breathing** refers to the volume of air moved with each breath (tidal volume). It is assessed qualitatively as **shallow** (minimal chest wall movement, often <500 mL tidal volume), **normal** (adequate visible chest wall rise), or **deep** (pronounced chest wall movement, often >500 mL tidal volume, seen in exercise or metabolic acidosis). **Tachypnea** (rapid breathing, >20 bpm in adults) may indicate fever, pain, anxiety, hypoxemia, metabolic acidosis, pulmonary embolism, pneumonia, or decompensated heart failure. **Bradypnea** (slow breathing, <12 bpm in adults) may indicate opioid-induced respiratory depression, central nervous system depression, hypothyroidism, or increased intracranial pressure. **Apnea** is the temporary cessation of breathing; brief apneic periods (<10 seconds) may be normal, but prolonged apnea requires immediate intervention. **Dyspnea** is subjective difficult or labored breathing; the patient reports feeling short of breath or breathless. **Orthopnea** is dyspnea that occurs when lying flat—patients with orthopnea often prefer sleeping on multiple pillows or in an elevated position (seen in heart failure, ascites, or conditions causing increased abdominal pressure). **Cheyne-Stokes respiration** consists of alternating periods of apnea and hyperpnea (deep, rapid breathing) in a cyclic pattern—this ominous pattern is seen in serious illness, end-of-life states, or neurologic injury and suggests poor prognosis. **Kussmaul respiration** is deep, rapid, often audible breathing (sometimes described as 'air hunger') seen in **metabolic acidosis**, especially **diabetic ketoacidosis (DKA)**—the body is attempting to 'blow off' carbon dioxide to correct the acidosis. **Oxygen saturation (SpO₂)** measured via pulse oximetry indicates the percentage of hemoglobin saturated with oxygen. **Normal SpO₂ is 95–100%**. Values **<90% indicate hypoxemia** and require immediate intervention: assess for causes (airway obstruction, decreased cardiac output, severe anemia, hypoxic lung disease), position upright, apply supplemental oxygen, and notify the physician. In patients with **chronic obstructive pulmonary disease (COPD)** or other chronic CO₂ retention syndromes, the hypoxic drive (low PaO₂ normally triggers breathing) is suppressed, and the patient relies on hypercapnia (elevated CO₂) to breathe. In these patients, applying high-flow oxygen can paradoxically suppress respiratory drive, leading to respiratory failure. Therefore, **for known COPD patients, target SpO₂ is typically 88–92%** (not the usual 95–100%), and supplemental oxygen must be carefully titrated per physician order to maintain this target. The nurse should assess baseline SpO₂ values and trends just as carefully as heart rate and blood pressure. **Assessment of breathing pattern** includes noting whether the rhythm is regular or irregular, whether there are audible sounds (wheeze, stridor, crackles), and whether accessory muscles (intercostal, scalene, sternocleidomastoid) are being used (indicates increased work of breathing). **Factors influencing respiration** include age (rates are higher in children), exercise and activity, emotional state and stress, fever (increases ~4 breaths per 1°C), medications (opioids decrease; stimulants increase), pain, anxiety, hypoxemia, hypercarbia, acidosis, alkalosis, and underlying pulmonary or cardiac disease.

Blood pressure (BP) is the force of blood exerted against the arterial walls, determined by the formula: **BP = Cardiac Output (CO) × Peripheral Vascular Resistance (PVR)**. Cardiac output is the volume of blood pumped by the heart per minute (affected by heart rate and stroke volume), and peripheral vascular resistance is the resistance to blood flow in the arterioles and smaller vessels (affected by vessel diameter, blood viscosity, and autonomic tone). **Systolic pressure** (the upper number) represents the pressure during left ventricular contraction (systole), when blood is forcefully ejected. **Diastolic pressure** (the lower number) represents the pressure during ventricular relaxation (diastole), when the aortic valve closes and the arteries recoil elastically. **Pulse pressure** = systolic − diastolic (normal ~30–40 mmHg); a widened pulse pressure may indicate atherosclerosis or aortic regurgitation, while a narrowed pulse pressure may indicate shock or tamponade. **Current BP classification for adults** (per updated guidelines, though classic NLE references may cite older criteria—follow your exam's reference): **Normal: SBP <120 mmHg AND DBP <80 mmHg**; **Elevated: SBP 120–129 AND DBP <80**; **Stage 1 Hypertension: SBP 130–139 OR DBP 80–89**; **Stage 2 Hypertension: SBP ≥140 OR DBP ≥90**; **Hypertensive Crisis: SBP >180 AND/OR DBP >120** (requires immediate intervention). **Hypotension** is defined as SBP <90 mmHg or clinically significant symptoms (dizziness, weakness, confusion); **orthostatic (postural) hypotension** is a drop of **≥20 mmHg systolic OR ≥10 mmHg diastolic** when moving from lying to standing (common in dehydration, prolonged bed rest, medications like antihypertensives or diuretics, and in older adults). **Accurate BP measurement** is essential because a single mismeasurement can lead to inappropriate treatment. **Proper technique**: Patient should be seated with back supported, feet flat on the floor (not dangling), and the arm at heart level (midaxillary line); the patient should rest for at least 5 minutes without talking; avoid caffeine, nicotine, and exercise for 30 minutes prior; ensure bladder is empty. **Cuff selection** is critical: The bladder of the cuff should encircle 80% of the arm's circumference; **a cuff too small = falsely elevated (high) reading**; **a cuff too large = falsely lowered (low) reading**. Do not measure BP on an arm with an IV catheter, dialysis fistula/graft, or on the side of mastectomy (to avoid lymphedema). **Measurement technique**: Inflate the cuff 20–30 mmHg above the point where the radial pulse disappears (to avoid missing the systolic pressure), then deflate slowly at 2–3 mmHg per second; **first Korotkoff sound = systolic pressure**; **disappearance of sound = diastolic pressure** (muffling of sound may occur but should not be recorded as diastolic—use disappearance). An **auscultatory gap** is a temporary disappearance and reappearance of Korotkoff sounds during deflation; to avoid missing the systolic pressure in a patient with an auscultatory gap, always **palpate the systolic pressure first**, then inflate the cuff 30 mmHg above that value before auscultating. **Common measurement errors** include: cuff too loose (falsely high reading), arm above heart level (falsely low reading), arm below heart level (falsely high reading), rapid deflation (misses diastolic), slow deflation (overestimates diastolic), talking during measurement, inadequate rest period, full bladder, and failure to use the correct cuff size. **Blood pressure regulation** occurs via multiple mechanisms: **baroreceptor reflex** (responds to pressure changes within seconds), **renin-angiotensin-aldosterone system (RAAS)** (responds over hours to days via sodium/fluid retention), and **sympathetic nervous system** (via epinephrine and norepinephrine). **Factors affecting BP** include age (increases with age), sex (slightly higher in males until menopause), circadian rhythm (lowest in early morning, highest in late afternoon/evening), exercise, stress and emotion, environmental temperature, hormones (estrogen, thyroid, catecholamines), medications (antihypertensives lower it; stimulants, NSAIDs, decongestants raise it), pain, anxiety, renal function, and cardiovascular disease. In clinical practice, **trending BP readings is more important than a single measurement**; a patient's baseline may be different from population norms, so always compare to the individual's usual BP. A progressive fall in BP with rising heart rate and respiratory rate suggests shock; a rising BP with headache and vision changes suggests hypertensive crisis.

Pain is defined as **'whatever the patient says it is, existing whenever the patient says it does'** (Margo McCaffery, foundational pain management theorist). This definition emphasizes that pain is **subjective and personal**—the patient is the expert on their own pain. Pain is rightfully called the 'fifth vital sign' because it reflects tissue damage, inflammation, or dysfunction and requires assessment, belief, documentation, and intervention just as vital as temperature, pulse, respiration, and blood pressure. Unrelieved pain triggers sympathetic activation (elevated heart rate, BP, respiratory rate, sweating), impairs healing and mobility, prolongs hospitalization, and diminishes quality of life. In the Philippine healthcare context and aligned with RA 9173, nurses have both the ethical duty and the professional responsibility to assess pain promptly, advocate for adequate pain management, and document findings. **Pain assessment** uses the framework **PQRST** (or **OLDCARTS**): **(P) Provoking/Palliating factors**: What causes or worsens the pain? What relieves it? **(Q) Quality**: How does the patient describe the pain? Sharp, dull, burning, throbbing, aching, crushing, stabbing? **(R) Region/Radiation**: Where is the pain? Does it radiate elsewhere? **(S) Severity**: On a 0–10 numeric rating scale (NRS), where 0 is no pain and 10 is the worst pain imaginable. **(T) Timing/Onset**: When did it start? Is it constant or intermittent? How long does it last? Additional assessment includes impact on function (does it limit movement, sleep, eating?) and associated symptoms (nausea, sweating, pallor). **Pain severity scales** appropriate for different populations: **(0–10 Numeric Rating Scale)**: Most reliable for verbal, cognitively intact adults; ask 'Rate your pain from 0 to 10.' **(Wong-Baker FACES scale)**: Validated for children ages 3–18; uses six faces ranging from smiling (no pain) to crying (worst pain), and the child points to the face matching their pain. **(FLACC scale—Faces, Legs, Activity, Cry, Consolability)**: Observational scale (0–10) for non-verbal infants and young children, scoring observable behaviors. **(Behavioral Pain Scales)**: For non-verbal, critically ill, or cognitively impaired patients, assessing facial expression, body movement, muscle tension, and vocalizations. **Pain classification**: **(1) Acute pain** is short-term, protective in nature (warns of tissue damage), usually has an identifiable cause, and resolves with healing or treatment. Examples include post-operative pain, fracture pain, labor pain. **(2) Chronic pain** is long-term (typically >3–6 months), persists beyond the normal healing period, often no identifiable treatable cause, and profoundly affects quality of life. Examples include chronic back pain, neuropathic pain, cancer pain. **(3) Nociceptive pain** results from activation of pain receptors (nociceptors) in response to tissue damage, is usually localized, and responds well to standard analgesics. Types include **somatic** (musculoskeletal) and **visceral** (organ) pain. **(4) Neuropathic pain** results from nerve injury or dysfunction (diabetic neuropathy, post-herpetic neuralgia, spinal cord injury) and presents as burning, tingling, shooting, or 'electric' sensations; often requires adjuvant medications beyond standard analgesics. **Pain management follows the WHO analgesic ladder** (a three-step approach): **Step 1** (mild pain, 0–3/10): Non-opioid analgesics—**paracetamol (acetaminophen)** 500 mg–1 g every 4–6 hours (max 4 g/day adult; lower maximum in liver disease or elderly), or **NSAIDs** like ibuprofen 400–600 mg every 6–8 hours (max 2400 mg/day) or aspirin 325–650 mg every 4–6 hours. NSAIDs carry risks of GI upset/ulceration, renal impairment, and cardiovascular effects, especially with long-term use. **Step 2** (moderate pain, 4–6/10): Weak opioids combined with non-opioids—codeine 30–60 mg every 4–6 hours, or tramadol 50–100 mg every 4–6 hours (caution with seizure risk and serotonin syndrome). **Step 3** (severe pain, 7–10/10): Strong opioids—morphine (gold standard), fentanyl, hydromorphone, oxycodone. Dosing is individualized; titrate to effect. Always add non-opioid and adjuvant therapies. **Adjuvant medications** enhance analgesia or treat pain-related conditions: antidepressants (amitriptyline for neuropathic pain), anticonvulsants (gabapentin, pregabalin), muscle relaxants, corticosteroids, and topical agents. **Non-pharmacologic pain management** techniques are essential, evidence-based, and reduce opioid requirements: **(1) Cutaneous stimulation**: massage, heat/cold application (heat for muscle tension, cold for inflammation), TENS (transcutaneous electrical nerve stimulation), and counterstimulation. **(2) Distraction**: music, conversation, activities, games—diverts attention away from pain. **(3) Relaxation and imagery**: deep breathing, progressive muscle relaxation (systematically tensing then relaxing muscle groups), guided imagery (patient visualizes a peaceful scene), meditation. **(4) Cognitive-behavioral**: reframing thoughts (replacing catastrophic thoughts with coping thoughts), mindfulness, acceptance-based strategies. **(5) Spiritual and emotional support**: prayer, presence, validation, therapeutic touch, listening. These techniques are especially valuable pre-operatively (reduces perioperative anxiety and pain) and for chronic pain where opioids are limited. **Opioid safety**: Opioids carry risks of **respiratory depression** (dose-dependent; can be life-threatening), constipation (almost universal; prophylactic bowel regimen is standard), nausea, drowsiness, and physical dependence. **Naloxone (Narcan)** is the specific opioid antagonist used for opioid overdose—it reverses respiratory depression and euphoria but can precipitate acute withdrawal. Standard dose is 0.4–2 mg IV, IM, or IN, repeated every 2–3 minutes up to 10 mg if needed. **Never withhold opioids from patients with severe or cancer pain out of fear of addiction**—addiction is psychological dependence, distinct from tolerance (need for higher doses) and physical dependence (withdrawal on sudden cessation). **Pain reassessment** occurs 30–60 minutes after analgesic administration (verbal medications) or within 5–15 minutes (IV doses); document the pain level before and after intervention and note the effect of the medication. **Special populations**: Older adults often underreport pain due to stoicism or belief that pain is normal; assess carefully and assume pain is present if behavioral changes occur. Patients with dementia may not verbalize pain but may show behavioral changes (agitation, withdrawal, combativeness); use observational scales and non-verbal cues. **Documentation** includes location, character, severity (0–10 scale), onset, duration, alleviating/aggravating factors, effect of interventions, and the patient's response. As emphasized in RA 9173, nurses are responsible for comprehensive pain assessment and advocacy for pain relief.

Vital signs vary significantly across the lifespan, and assessment techniques must be adapted to the individual's developmental stage and ability to cooperate. Understanding age-specific normal ranges and measurement techniques is essential for accurate interpretation and prevention of unnecessary interventions. **Infants (birth to 12 months)**: Temperature regulation is immature; infants cannot shiver and are highly susceptible to hypothermia, requiring careful thermal management. **Normal vital signs**: T ~36.5–37.5°C (similar to adults but prone to fluctuation), **P 120–160 bpm** (rapid due to higher metabolic rate and less efficient cardiac output), **R 30–60 breaths/min** (rapid, often irregular and diaphragmatic), **BP** systolic 50–70, diastolic 25–45 mmHg (significantly lower than adults). **Assessment techniques**: For temperature, axillary or tympanic routes are preferred (rectal avoided due to risk in this population; oral impossible). For pulse, the **apical pulse is mandatory**—it is more accurate than radial in infants and must be counted for a full minute because of irregularity and to distinguish normal sinus arrhythmia from pathologic arrhythmia. Apical location is at the 4th intercostal space (slightly higher than adults) at the left midclavicular line. For respiration, count for a full minute without the infant's awareness; infants are diaphragmatic breathers, so observe abdominal movement. For BP, use an appropriately sized cuff (bladder encircles 80% of arm); automated devices are acceptable but manual auscultation is the gold standard. Assessment order in infants is critical: **assess respirations and apical pulse first, BEFORE disturbing the infant** (cry and activity elevate all parameters), then assess temperature and BP. **Toddlers and preschoolers (1–5 years)**: Normal vital signs begin approaching adult values. **Normal vital signs**: T ~37.2°C (slightly higher than adults in this age group), **P 90–140 bpm** (decreasing with age), **R 20–30 breaths/min**, **BP** systolic 95–110, diastolic 56–70 mmHg. **Assessment techniques**: Axillary or tympanic temperature is appropriate (oral possible if the child can hold the thermometer safely). Radial pulse can be assessed if the child cooperates; apical is still more reliable. Respiration should be counted discreetly. For BP, use age-appropriate cuff and normal auscultation technique. Pain assessment uses the Wong-Baker FACES scale (child points to the face matching their pain). Children in this age are often anxious about procedures; distraction (toys, TV, stories) is effective. **School-age children (6–12 years)**: Vital signs approach adult ranges. **Normal vital signs**: T ~37°C, **P 70–110 bpm**, **R 18–26 breaths/min**, **BP** systolic 102–122, diastolic 62–78 mmHg (increases with age toward adult values). **Assessment techniques**: All adult techniques apply; radial pulse and oral temperature are now appropriate. Pain assessment uses 0–10 numeric scale or Wong-Baker FACES (transition toward adult scales). Children this age may participate in their own care and respond to education. **Adolescents (13–18 years)**: Vital signs are essentially adult-range. **Normal vital signs**: T ~37°C, **P 60–100 bpm**, **R 12–20 breaths/min**, **BP** systolic 110–136, diastolic 65–86 mmHg (adult ranges). **Assessment techniques**: All adult techniques apply. Pain assessment uses 0–10 NRS. Respect privacy and involve the adolescent in care decisions. **Older adults (65+ years)**: Aging affects vital sign regulation and interpretation. **(1) Temperature**: Older adults have blunted febrile response to infection—a 'normal' temperature (37°C) does NOT rule out infection. They may present with hypothermia or only low-grade fever despite serious infection (e.g., pneumonia, UTI, sepsis). **Always assess for infection signs (confusion, weakness, functional decline) regardless of temperature.** They are also at risk for hypothermia due to reduced metabolic rate and impaired thermoregulation. **(2) Pulse**: Heart rate is often slower (effects of beta-blockers, loss of sinoatrial node cells); however, older adults have less cardiac reserve and may not mount as high a heart rate in response to stress. Irregular rhythms (atrial fibrillation) are common and increase stroke risk. **(3) Respiration**: Baseline respiratory rate may be normal; however, older adults have reduced lung compliance and are at higher risk for respiratory infections and impaired gas exchange. **(4) Blood Pressure**: Peripheral arteries stiffen with age (reduced elasticity), leading to increased systolic BP and widened pulse pressure. Older adults are at high risk for **orthostatic hypotension** (≥20 mmHg drop in SBP on standing), which causes dizziness, falls, and syncope—especially with medications like antihypertensives, diuretics, and nitrates. **Always assess BP in lying, sitting, and standing positions**; allow 1–3 minutes between position changes. **(5) Pain**: Older adults often underreport pain due to stoicism, belief that pain is normal aging, fear of addiction, or cognitive decline. Use observational behavioral cues (facial expression, body tension, guarding) in addition to verbal reports. **(6) Special considerations**: Compare all readings to the **patient's own baseline**—an older adult's 'normal' BP may be 160/90 (chronic hypertension), so a reading of 140/82 may actually represent significant hypotension for that individual. Polypharmacy (multiple medications) affects vital signs—beta-blockers lower HR and BP, NSAIDs elevate BP, anticholinergics elevate HR. Chronic conditions (COPD, CHF, diabetes) alter vital sign patterns. Cognitive impairment may prevent accurate symptom reporting. Fall risk increases with orthostatic hypotension, so address it proactively (review medications, increase fluid, use compression stockings, chair/bed alarms).

Vital signs do not exist in isolation; they are influenced by numerous physiologic, environmental, and behavioral factors. A competent nurse recognizes these influences and interprets vital signs within the complete clinical context rather than reacting to isolated abnormal values. **Age** is a fundamental determinant: vital signs decrease toward adult norms as children grow (heart rate and respiratory rate slow with age), while older adults may have elevated BP due to arterial stiffness. **Circadian rhythm** (diurnal variation) affects all vital signs: temperature is lowest in early morning (often 0.5–1°C lower than afternoon values) and peaks in late afternoon/early evening; heart rate, respiratory rate, and BP follow similar patterns with lower values in early morning and higher values in afternoon. This is why BP and heart rate measured at 6 AM may appear abnormally low compared to values measured at 3 PM—the time of measurement must be considered when interpreting trends. **Exercise and activity** acutely elevate heart rate, respiratory rate, BP, and temperature; measurements should be taken after 5 minutes of rest for accuracy. A patient who just walked to the bathroom will have elevated vital signs; remeasure after 5–10 minutes of rest. **Fever and elevated temperature** independently raise heart rate (approximately 10 bpm per 1°C elevation), respiratory rate (approximately 4 breaths per 1°C), and may elevate BP slightly. **Stress, anxiety, and emotion** activate the sympathetic nervous system, raising heart rate, respiratory rate, and BP. **Pain** similarly causes sympathetic activation with elevated heart rate, BP, and respirations; pain relief should lower these parameters. **Environment**: Cold exposure causes vasoconstriction, elevates BP and heart rate; heat exposure causes vasodilation, lowers BP, and may elevate heart rate. **Hormones** affect vital signs: **estrogen** (higher in reproductive-age females, lower post-menopausal) tends to keep heart rate slightly higher and BP lower; **thyroid hormone** (hyperthyroidism elevates HR and BP, hypothyroidism lowers them); **catecholamines** (epinephrine, norepinephrine) elevate HR and BP. **Medications** profoundly affect vital signs: **Beta-blockers** (atenolol, metoprolol) lower heart rate and BP; **ACE inhibitors and ARBs** lower BP; **diuretics** can lower BP and cause electrolyte imbalances affecting cardiac rhythm; **stimulants** (caffeine, amphetamines, decongestants containing pseudoephedrine) elevate HR and BP; **opioids** lower heart rate and respiratory rate and can suppress breathing; **vasopressors** (epinephrine, norepinephrine, dopamine) elevate HR and BP; **NSAIDs** can elevate BP and affect renal function. **Hemorrhage and hypovolemia** trigger compensatory tachycardia and tachypnea as the body tries to maintain perfusion; BP may be maintained initially (due to sympathetic activation) but falls as blood loss becomes critical. **Hypoxemia** and **hypercarbia** trigger tachycardia and tachypnea. **Metabolic acidosis** causes tachypnea (respiratory compensation—Kussmaul breathing). **Pulmonary and cardiac disease** alter vital signs: pneumonia causes tachypnea and tachycardia; heart failure may cause tachycardia, tachypnea, and elevated BP initially. **Hypothyroidism and CNS depression** may cause bradycardia and bradypnea. **Intracranial pressure elevation** (head trauma, stroke, mass) may cause the **Cushing triad**: hypertension, bradycardia, and bradypnea—an ominous finding. **Renal disease** elevates BP due to sodium/fluid retention and activates the RAAS. **Anemia** causes compensatory tachycardia and tachypnea. **Clinical interpretation in context**: A single elevated heart rate, for example, requires investigation: Is the patient febrile (fever raises HR ~10 bpm per degree)? In pain? Anxious? Hypoxic? Hypovolemic? On stimulating medications? Have they recently ambulated? Depending on the cause, different interventions are warranted. Similarly, a patient with baseline HR of 55 bpm (athlete or on beta-blocker) is not bradycardic; understanding the patient's baseline and context is essential. **Red flag patterns** indicate serious deterioration: **Rising heart rate + rising respiratory rate + falling BP + falling SpO₂** = shock (septic, hypovolemic, cardiogenic, or anaphylactic)—requires urgent intervention. **Rising heart rate + rising BP + rising temperature** = infection or sepsis—requires assessment and antibiotics. **Falling heart rate + falling respiratory rate + altered mental status** = severe CNS depression or catastrophic neurologic event—requires immediate escalation. **Wide pulse pressure (systolic high, diastolic low)** with bounding pulse and flushed skin = hyperthermia, sepsis, or thyroid storm. **Narrow pulse pressure (systolic and diastolic both low, small difference)** = shock or tamponade. These patterns, recognized through trending vital signs, allow early detection of deterioration and timely intervention—a core competency in clinical nursing practice.

Accurate, timely documentation and reporting of vital signs are essential for continuity of care, communication with the healthcare team, early detection of deterioration, and legal protection. The nurse's documentation becomes part of the medical-legal record and may be scrutinized in quality reviews or malpractice litigation. **Documentation requirements for vital signs**: **(1) Route/site of measurement** must be specified because different routes give different values: 'T 38.2°C axillary' (not just 'T 38.2°C'), 'P 96 apical' or 'P 92 radial', 'BP 130/84 right arm, sitting', 'SpO₂ 96% on room air' (or specify oxygen source and liters if supplemental O₂ is used). **(2) Date and time** of measurement is essential for trending. **(3) Context** should be noted when relevant: 'T 38.6°C oral, 2 hours post-paracetamol 1 g IV', 'HR 104 upon ambulation; decreased to 88 after 10 minutes rest', 'BP 150/90 in clinic; patient reports white coat anxiety; home readings 128–136/76–82 mmHg'. **(4) Completeness**: Document all five vital signs (temperature, pulse, respiration, blood pressure, and pain) at routine intervals; omitting a vital sign is poor practice and may indicate inadequate assessment. **(5) Abnormal findings and nursing actions**: If a vital sign is abnormal or shows a concerning trend, document the finding, your assessment and interpretation, interventions taken, and the response. Examples: 'Tachycardia noted (HR 118); patient reports severe pain 9/10 in surgical wound. Analgesic ordered and administered. HR decreased to 94 in 30 minutes; pain now 6/10.' or 'BP 88/52 (drop from baseline 130/80); patient reports dizziness. Positioned supine, O₂ applied, IV bolus initiated per protocol. Physician notified. Repeat BP 102/68 after 10 minutes.' **Vital signs recording** on the graphic flow sheet (or electronic health record) is standard in all facilities. Plot values on the graph so **trends are visible at a glance**—a rising trend in HR and RR with falling BP and SpO₂ immediately alerts anyone reviewing the chart to potential deterioration. **Reporting abnormal or concerning findings** to the physician or charge nurse must be done **promptly** and follows the **SBAR** format for clarity: **(S) Situation**: 'I am calling about Mr. [Name] in Room [X]; he is post-op day 2 from hip replacement.' **(B) Background**: 'His vital signs this morning were normal, but over the past 4 hours I have noted...' **(A) Assessment**: 'I am concerned he may be developing early shock/infection/bleeding...' **(R) Recommendation**: 'I recommend the physician assess him now' or 'May I order...?' This structured communication ensures the physician understands the urgency and context. **Never normalize abnormal findings**—if vital signs are abnormal or trending worryingly, escalate. In Philippine healthcare settings aligned with RA 9173, nurses have both the authority and the duty to report abnormalities and advocate for patient safety. **Trending and escalation**: Many facilities use **early warning scoring systems** (EWS) or **Rapid Response Team (RRT)** criteria to standardize escalation of deteriorating patients. For example, a patient with HR >110, RR >20, BP <90 systolic, or SpO₂ <90% may trigger an EWS score requiring closer monitoring or physician notification. Plotting vital signs graphically makes these trends visible and facilitates early intervention. **Example documentation**: 'Vital Signs (0800 hrs): T 37.2°C axillary, P 92 regular and strong radial, R 18 regular and unlabored, BP 128/76 right arm sitting, SpO₂ 98% RA, Pain 0/10. Patient alert and oriented, resting comfortably.' 'Vital Signs (1200 hrs): T 38.6°C oral, P 104 apical, R 22, BP 132/78 right arm sitting, SpO₂ 94% RA. Patient reports chills and malaise. Skin warm and flushed. Physician notified of fever; paracetamol 1 g PO ordered and given at 1215 hrs.' 'Reassessment (1315 hrs): T 37.8°C oral (post-paracetamol), P 96 apical, R 18, BP 130/80. Patient reports fever has broken, chills resolved, feeling more comfortable. Encouraged fluid intake and rest.' This documentation tells a complete story of the patient's status, the nurse's assessment, the intervention, and the response—allowing anyone reading the chart to understand the clinical picture and continuity of care.

In the Philippine healthcare system, the assessment and management of vital signs occurs across all Nursing Care Management (NCM) levels and in various healthcare delivery settings, all guided by RA 9173 (Philippine Nursing Practice Act). Understanding these contexts ensures that nurses provide safe, evidence-based, culturally appropriate care aligned with professional standards. **RA 9173 (The Philippine Nursing Practice Act, 2002)** defines nursing as 'the protection, promotion, and optimization of health and abilities, prevention of illness and injury, alleviation of suffering through the diagnosis and treatment of human response, and advocacy in the care of individuals, families, communities, and populations.' It establishes that nurses, in all roles, assess patients comprehensively, including vital signs, and must interpret findings and communicate abnormalities to ensure patient safety. The act grants nurses autonomy in nursing diagnosis and care planning within the scope of nursing practice. **NCM Levels** define nurses' roles and responsibilities across the healthcare continuum: **(NCM I—Community/Primary/Secondary Health Care)**: Community health nurses working in barangay health centers, municipal health offices, and outpatient clinics assess vital signs on admission and at routine visits; interpret findings within the community context (recognizing that accessible healthcare may be limited); educate patients and families on health promotion and disease prevention; and recognize when referral to higher-level facilities is needed. For example, a barangay health worker assessing a pregnant mother's vital signs (to monitor for pre-eclampsia: elevated BP, proteinuria) or an elderly patient with chronic hypertension ensures regular monitoring, medication compliance, and early detection of complications. **(NCM II—Secondary/Tertiary Health Care - Hospital)**: Hospital nurses assess vital signs frequently (on admission, pre/post-operatively, regularly per unit protocol, and with any change in condition) in acute-care settings where patients have more complex illnesses. Interpreting vital signs is critical for detecting intraoperative complications (e.g., malignant hyperthermia presents as sudden fever, tachycardia, muscle rigidity), post-operative complications (infection, bleeding, deep vein thrombosis), and deterioration in medical patients (heart failure exacerbation, sepsis). Trending vital signs allows early recognition of deterioration and escalation. **(NCM III—Community Health Assessment/Population Health)**: Public health nurses assess vital signs in population screenings, mobile clinics, school health programs, and disaster response. They interpret findings at the population level (e.g., hypertension prevalence in a community) and individual level (recognizing and referring hypertensive individuals for treatment). **Vital signs assessment in common Philippine healthcare settings**: **(1) Barangay Health Centers**: The BHW (barangay health worker) or village health worker, often the only healthcare provider available, assesses vital signs during home visits, maternal health checks, immunization clinics, and management of minor illnesses. Given limited laboratory and imaging resources, vital signs and clinical observation are paramount. A febrile child with cough and tachypnea in a remote barangay may not have access to chest X-ray; the BHW must recognize signs of pneumonia (fever, tachypnea, crackles if heard) and refer for treatment. **(2) Hospital Emergency Departments**: ED nurses assess vital signs on arrival and continuously during triage and treatment. Rapid vital sign assessment identifies critically ill patients (SIRS criteria: fever, tachycardia, tachypnea, elevated WBC suggest systemic inflammation; hypotension indicates shock). A patient arriving with BP 76/48, HR 130, RR 28 is in shock and requires immediate intervention regardless of chief complaint. **(3) Hospital Wards**: Medical and surgical nurses assess vital signs per facility protocol (often every 4 hours, every 1–2 hours for post-op patients). Trending alerts the team to deterioration. **(4) ICUs**: ICU nurses assess vital signs continuously via monitors and frequently (every 1–2 hours) via manual assessment. Vital signs are essential indicators of organ function and response to critical illness and interventions. **(5) Maternal-Fetal Health Settings**: Obstetric nurses assess vital signs during pregnancy (recognizing that pre-eclampsia presents with hypertension, headache, visual changes), labor (monitoring for maternal and fetal distress), and postpartum (watching for infection, hemorrhage, thromboembolism). A postpartum mother with fever >38.5°C, tachycardia, and uterine tenderness suggests endometritis and requires antibiotics. **(6) Pediatric Settings**: Pediatric nurses assess vital signs using age-appropriate techniques and normal ranges; they educate parents on fever management and when to seek care. A 6-month-old with fever, lethargy, and altered cry requires urgent evaluation. **(7) Community/Home Health**: Home care nurses assess vital signs during home visits, identify trends over time, and communicate findings to the primary care physician. An elderly patient with diabetes and hypertension may have serial BP readings at home; the nurse analyzes trends and reports to the physician for medication adjustment. **Cultural and socioeconomic considerations in Philippine practice**: Nurses in the Philippines work in diverse, resource-limited settings. Some patients may lack access to all medications or routine monitoring. Understanding the patient's ability to comply with antihypertensives or monitor at home is essential. Health literacy varies; clear, simple explanations of vital sign abnormalities (avoiding jargon) and involving family members in care improve outcomes. **Alignment with RA 9173 and professional responsibility**: Under RA 9173, nurses in all settings are mandated to: assess vital signs accurately, interpret findings in clinical context, document findings completely, report abnormalities promptly to the physician or appropriate supervisor, and advocate for the patient's safety. Failure to assess or report abnormal vital signs constitutes negligence and breach of professional duty. The nurse's assessment of vital signs, combined with the patient's symptoms, physical examination, and laboratory findings, forms the foundation of the nursing diagnosis and care plan. For example, a patient with a nursing diagnosis of **'Hyperthermia related to infectious process (pneumonia) as evidenced by temperature 39.4°C, tachycardia, and tachypnea'** requires nursing interventions including continued assessment, fever management (tepid sponging, fluids, antipyretics), monitoring for complications (dehydration, febrile seizures), and evaluation of response. **Maslow's Hierarchy and vital sign priorities**: Using Maslow's framework, vital signs reflecting **physiologic needs** (breathing, temperature regulation, circulation) take priority. A patient with SpO₂ 85% (breathing/oxygenation compromised) is a higher priority than a patient with pain 4/10 or social isolation—address the hypoxemia first. **Examples of vital signs assessment across NCM levels in Philippine context**: (1) **NCM I (Community)**: A BHW in a remote barangay assesses a 60-year-old farmer's BP at 162/96 mmHg during a home visit. The BHW educates on diet/exercise, refers to the municipal health office for medication, and schedules follow-up. (2) **NCM II (Hospital)**: An RN in a tertiary hospital's surgical ward notes a post-op patient's HR rising from 88 to 110 bpm, BP falling from 138/84 to 118/72, RR increasing from 16 to 22, and SpO₂ dropping to 91% over 2 hours. The nurse immediately notifies the surgeon; assessment reveals internal bleeding, and the patient returns to the OR. (3) **NCM III (Public Health)**: A nurse at a community screening program detects elevated BP (160/100) in an asymptomatic 45-year-old. The nurse provides brief intervention (education, referral for follow-up), documents the finding in the community database, and contributes to epidemiologic understanding of hypertension prevalence in the community.