NLE Emergency & Critical Care Nursing — Basic & Advanced Life Support (CPR/ACLS)Study Notes

Survival from cardiac arrest is not a single action but a sequence of linked interventions, each strengthening the chance of recovery. Think of the chain of survival as a series of critical links: if any one breaks, the chance of the patient leaving the hospital declines sharply. The five links are: (1) early recognition and activation of emergency response, (2) early high-quality CPR, (3) rapid defibrillation, (4) effective advanced care, and (5) integrated post-arrest care including targeted temperature management and treatment of the underlying cause. As a nurse, the first two links—immediate recognition that something is wrong and immediate, high-quality compressions—are the ones most directly under your control. Many studies show that patients who receive bystander CPR within the first few minutes of collapse have survival rates 2 to 3 times higher than those who wait for advanced life support. In the Philippine healthcare context, where pre-hospital systems may be stretched and response times variable, the nurse's role in rapid recognition and immediate action is even more critical. Every second of delay to the start of compressions costs the patient roughly 5-10% of their chances of neurologically intact survival. The message is unambiguous: recognize, activate, and compress—in that order, without hesitation.

Basic life support in adults follows the modern C-A-B sequence: **Compressions, then Airway, then Breathing.** This is a fundamental shift from the older ABC (airway-breathing-compressions) approach. The reason is physiologic: at the moment of cardiac arrest, the blood already in the patient's lungs and systemic circulation is still oxygenated. The immediate priority is to circulate that reservoir of oxygen-rich blood to the brain and heart. Chest compressions do this. Opening the airway and delivering breaths are important, but only after you have pumped oxygenated blood toward the vital organs. **Step-by-Step BLS Protocol for Adults:** 1. **Ensure Scene Safety:** Before approaching, confirm the environment is safe. Is there broken glass, fire, traffic, or chemical hazard? If unsafe, wait for rescue personnel or move the patient if possible without risk to yourself. 2. **Check Responsiveness:** Tap the patient's shoulders firmly and shout, "Are you okay?" Look for any response—words, movement, eye opening. Agonal gasping (occasional deep breaths or gasps) may occur in the first minute of arrest; this is **not** normal breathing and should **not** delay CPR. 3. **Assess Breathing and Pulse Simultaneously (10 seconds maximum):** Look at the chest for rise and fall. Check for a carotid pulse by placing two fingers (index and middle) in the groove between the trachea and the sternocleidomastoid muscle on the side nearest you. Do not spend more than 10 seconds on this; if you are unsure, assume no pulse and proceed with CPR. Lay rescuers (untrained bystanders) should not attempt a pulse check; for them, unresponsiveness plus no normal breathing is sufficient to start compressions. 4. **Activate Emergency Response:** Call the emergency number (in the Philippines, this varies by location but may be through the hospital operator, local fire station, or ambulance service). If you are alone, use your phone on speaker so you can continue compressions and still hear dispatch instructions. In a hospital, activate the code button or verbally call a code. 5. **Begin Chest Compressions Immediately (no more than 30 seconds delay):** Do not wait for advanced equipment or a physician. Position yourself at the patient's side. Place the heel of one hand on the lower half of the sternum (the breastbone), between the nipples. Place your other hand on top of the first, interlocking the fingers. Keep your arms straight and your shoulders directly above your hands. Press hard and fast into the chest, depressing the sternum at least 5 cm (2 inches) but not more than 6 cm (2.4 inches) at a rate of **100 to 120 compressions per minute.** **Critical Compression Parameters (High-Yield for NLE):** - **Rate: 100 to 120 compressions per minute.** Use a metronome, a song with this beat (such as "Stayin' Alive"), or internal counting. Slower than 100 and you do not generate enough blood flow; faster than 120 and your compressions become shallow and the chest does not recoil fully between compressions, which reduces refilling of the heart. - **Depth (adult): at least 5 cm (2 inches), not more than 6 cm (2.4 inches).** Shallow compressions do not generate adequate coronary and cerebral perfusion pressure. Excessive depth increases the risk of rib fractures, sternal fractures, and internal injuries, but this risk is far outweighed by the certainty of death if compressions are too shallow. Do not be timid. - **Full Chest Recoil Between Compressions:** This is non-negotiable. Do not lean on the patient's chest between compressions. Allow the sternum to return completely to its resting position. This allows the heart to refill with blood between compressions. If you lean, intrathoracic pressure stays elevated and venous return plummets. - **Minimize Interruptions:** The goal is a compression fraction of at least 60%, meaning compressions are being delivered at least 60% of the total arrest time. Even brief pauses for rhythm checks, intubation, or other procedures must be as short as possible. Plan ahead: prepare equipment, drugs, and roles before the pause; keep pulse checks and rhythm analyses to 5 seconds or less. - **Rotate Compressors Every 2 Minutes:** Even well-trained, strong rescuers fatigue within 2 minutes. Fatigue degrades depth and rate, and the rescuer often does not feel it happening. A fresh person should take over seamlessly: the new compressor positions themselves at the count of "20" in the final cycle, and at "30," the new person takes over without missing a beat. If only one rescuer is available, do your best for as long as you can; in a hospital, other staff should already be rotating in. **After the First Cycle of Compressions (30 compressions):** After 30 compressions, open the airway. Use the **head-tilt/chin-lift maneuver** (unless trauma is suspected, in which case use the jaw-thrust without head extension). Tilt the head back slightly and lift the chin upward to open the mouth. If trauma is possible, support the neck and jaw without tilting the head. Deliver **two rescue breaths**, each over about 1 second, with just enough air to produce visible chest rise. If the chest does not rise, reposition the head and try again. Excessive ventilation (too many breaths, too much volume) is a frequent error that raises intrathoracic pressure, reduces venous return, and actually worsens perfusion. More is not better; visible chest rise is the target. If you are unable or unwilling to give rescue breaths (fear of infection, lack of training, or anxiety), **hands-only CPR** (continuous compressions without breaths) is effective, especially for adults, and is the approach recommended for untrained bystanders. The 30:2 ratio remains the standard for trained rescuers. **Special Considerations: Pediatric and Infant CPR** For a **child** (roughly 1 year to puberty), the compression depth is approximately **one-third of the anteroposterior chest diameter**, which is roughly 5 cm. Use one or two hands depending on the child's size; if using two hands, the technique is the same as for adults. The compression-to-ventilation ratio for a single rescuer remains **30:2**. For **two rescuers** managing a child or infant, the ratio is **15:2** (15 compressions followed by 2 breaths). For an **infant** (under 1 year), compress at a depth of roughly 4 cm (about one-third of the chest AP diameter). For a **single rescuer**, use the **two-finger technique**: place the tips of your index and middle finger on the sternum just below the nipple line and compress. For **two rescuers**, use the **two-thumb encircling technique**: place your thumbs side by side on the sternum with your fingers encircling the back of the chest and compress. The two-thumb technique generates more force and is preferred when two people are present. The ratio is **15:2** for two rescuers.

Defibrillation is the only definitive treatment for ventricular fibrillation (VF) and pulseless ventricular tachycardia (pVT)—the two most common rhythms in witnessed sudden cardiac arrest, especially in younger adults with acute coronary syndromes. Every minute without defibrillation lowers the chance of survival by approximately 7 to 10 percent. An AED is a portable, automated device that analyzes the patient's heart rhythm and advises whether a shock is needed. Modern AEDs have high sensitivity and specificity; they will not shock a non-shockable rhythm, and they will reliably identify and treat shockable rhythms when pads are correctly applied. **AED Use Protocol (Step-by-Step):** 1. **Power On and Follow Voice Prompts:** As soon as the AED arrives (whether brought by a team member or a bystander), power it on. Modern AEDs are extremely user-friendly; voice prompts guide you through every step. Do not be intimidated; follow the voice. 2. **Prepare and Apply Pads:** Expose the patient's bare chest. If the chest is wet (from sweat, rain, or water immersion), wipe it dry quickly with a cloth or towel. Trim excessive chest hair only if it prevents pad adherence; do not waste time shaving. Apply one adhesive pad on the bare skin below the right clavicle (high on the chest, lateral to the midline), and the second pad on the left lateral chest wall at the level of the fifth intercostal space (roughly at the anterior axillary line, level with the nipple). Ensure the pads are at least 2.5 cm (1 inch) away from an implanted pacemaker or implantable cardioverter-defibrillator (ICD). Press firmly to ensure good contact. 3. **Special Situations for Pad Placement:** - **Transdermal patches:** Remove any medication patches (such as nitroglycerin, scopolamine, or estrogen) from the site where the pad will be placed. If the patch cannot be removed quickly, place the pad 2.5 cm away. - **Pacemaker or ICD:** If a hard bulge is palpable under the left upper chest (or the patient states they have a device), place the pad 2.5 cm away from the device, typically moving it more laterally or inferiorly. - **Wet patient:** Dry the chest quickly and apply pads. Defibrillation is safe in water; pad contact is what matters. - **Very hairy chest:** If hair prevents pad adhesence (rare), clip (do not shave) enough to allow pads to stick. This should take no more than 10-15 seconds; if it will take longer, just apply the pads as-is and accept slightly less contact. - **Pediatric patients:** If pediatric pads or an attenuator (a device that reduces the energy output to child-safe levels, typically 50-80 J instead of 200 J) are available, use them. If not, adult pads can be used; ensure they do not touch each other (use anterior-posterior placement if space is tight: one pad on the anterior chest, one on the posterior left scapular region). - **Very obese patients or pregnant patients:** Apply pads as standard if space allows. If the standard anterolateral placement is difficult due to breast tissue or abdominal contour, use anterior-posterior placement (anterior right chest and posterior left scapula). 4. **Stop Compressions and Ensure No One Is Touching the Patient:** Once pads are applied, the AED will announce that it is analyzing the rhythm. At this point, **everyone must stop touching the patient.** You do not check a pulse during analysis; just get clear. This usually takes only 5-10 seconds. 5. **Deliver Shock If Advised:** The AED will announce whether a shock is advised. If shock is advised: - Announce clearly: "Shock advised. Everyone clear. Shocking now." - Visually and verbally confirm that no one is touching the patient, the bed, or anything the patient is in contact with. - Press the shock button on the AED (or if fully automatic, the AED will deliver the shock on its own after a brief delay). - The patient's muscles will contract visibly when shocked; do not be alarmed. 6. **Immediately Resume Compressions:** As soon as the shock is delivered, resume chest compressions at 100-120/min without pausing to check a pulse or recheck the rhythm. Continue compressions for the full 2 minutes until the AED is ready to analyze again. Even if the rhythm converts to a perfusing rhythm, compressions support perfusion while the heart "wakes up." Do not interrupt compressions to assess whether the patient is responding; that comes after 2 minutes of CPR when the AED re-analyzes. **Key AED Principles:** - **Analyze without interrupting compressions** (if feasible): Some newer AEDs can analyze the rhythm even while compressions are ongoing, reducing the pause needed. If this is an option, use it. - **Minimize the pause for analysis:** The period from the end of one compression cycle to the start of the next analysis should be as brief as possible. Aim for a pause of no more than 10 seconds. - **Do not pause after shock to check pulse or assess responsiveness.** Resume compressions immediately. This is a common error that delays perfusion. - **Repeat defibrillation every 2 minutes if the rhythm remains shockable:** After 2 minutes of CPR following the first shock, the AED will analyze again. If VF or pVT persists, deliver another shock and resume compressions for another 2 minutes. - **AEDs are safe in all environments:** They work in rain, in a swimming pool, in an ambulance, on a moving vehicle. Pad contact and electrical safety for rescuers are the considerations, not the environment. **Post-Shock Management:** After successful defibrillation and ROSC (return of spontaneous circulation—a perfusing rhythm with signs of life such as movement, spontaneous breathing, or a palpable pulse), the focus shifts to: - Maintaining airway patency and adequate oxygenation (target oxygen saturation around 94-98%, not hyperoxia above 100%). - Supporting blood pressure and perfusion (if available, apply continuous cardiac monitoring, establish IV/IO access, and prepare vasopressors if MAP is low). - Identifying and treating the cause of arrest (e.g., acute MI, severe hypoxia). - Considering targeted temperature management (controlled hypothermia or normothermia depending on patient factors) to protect the brain from post-arrest injury. - Arranging transfer to a cardiac catheterization lab if acute MI is suspected.

Advanced cardiovascular life support (ACLS) is the next level beyond BLS, adding rhythm interpretation, medications, advanced airway management, and systematic search for reversible causes. The core decision point in ACLS is whether the arrest rhythm is **shockable** (VF and pulseless VT) or **non-shockable** (asystole and pulseless electrical activity). This distinction determines drug timing, shock delivery, and the aggressiveness of the search for reversible causes. **Shockable Rhythms: Ventricular Fibrillation (VF) and Pulseless Ventricular Tachycardia (pVT)** Ventricular fibrillation is a chaotic, disorganized rhythm in which the ventricles quiver ineffectually and produce no cardiac output. Pulseless ventricular tachycardia is a rapid, organized ventricular rhythm (usually >150 beats/min) that, despite appearing organized on the monitor, produces no perfusing pulse. Both are best treated by **immediate defibrillation** followed by high-quality CPR and medications. **ACLS Protocol for Shockable Rhythms:** 1. **Shock 1 (as soon as possible):** Defibrillate at 200 J (biphasic) or equivalent. 2. **Resume CPR immediately:** 2 minutes of high-quality compressions without pausing to check a pulse. 3. **At 2 minutes:** Analyze rhythm again. - If shockable rhythm persists: **Shock 2 → Resume CPR for 2 minutes → Give epinephrine 1 mg IV/IO** (see below). - If non-shockable or ROSC: Transition to that protocol. 4. **Every 3 to 5 minutes thereafter:** Give **epinephrine 1 mg IV/IO** if not already given after the second shock. The timing is: first dose after shock 2, then repeat every 3 to 5 minutes throughout the arrest. 5. **Second antiarrhythmic (after refractory VF/pVT):** After two shocks with persisting VF/pVT, administer **amiodarone 300 mg IV/IO.** If VF/pVT persists after the next shock, give **amiodarone 150 mg IV/IO.** Lidocaine (1 to 1.5 mg/kg IV, then 0.5 to 0.75 mg/kg every 5 to 10 min, max 3 mg/kg in first hour) is an acceptable alternative if amiodarone is unavailable. **Non-Shockable Rhythms: Asystole and Pulseless Electrical Activity (PEA)** Asystole is a flat-line rhythm—no electrical activity at all on the monitor. Pulseless electrical activity (PEA) is an organized electrical rhythm on the monitor (could look like normal sinus rhythm, a narrow complex rhythm, or a bradycardia) but no detectable pulse, no breath sounds, and no signs of perfusion. Neither asystole nor PEA is treated with defibrillation. Instead, the management is **high-quality CPR plus medications and aggressive search for reversible causes.** **ACLS Protocol for Non-Shockable Rhythms:** 1. **No shock.** Do not defibrillate asystole or PEA. 2. **Start CPR immediately** (if not already ongoing) and **give epinephrine 1 mg IV/IO as soon as possible.** In asystole, early epinephrine is critical; in PEA, it is given but outcomes are generally worse than in shockable rhythms, so the search for reversible causes is paramount. 3. **Every 3 to 5 minutes:** Repeat epinephrine 1 mg IV/IO. 4. **Rhythm check every 2 minutes:** Continue compressions without interruption; just pause briefly to analyze the rhythm. If organized electrical activity appears (narrow or wide complex), confirm it is associated with a pulse; if not, continue CPR. 5. **Confirm asystole:** Asystole can be mimicked by fine VF or a lead that has become disconnected. To avoid mistaking fine VF for asystole and missing an opportunity to defibrillate, confirm asystole in **more than one lead** (typically lead II and lead aVF, or a right-sided lead if available). If there is any doubt, treat as VF and attempt defibrillation. **Special Circumstances in Non-Shockable Rhythms: When to Terminate CPR** Asystole carries a very poor prognosis (estimated 5-10% survival to hospital discharge even with optimal care, and typically <1% if the arrest is unwitnessed or if no response to resuscitation is seen in the first 20-30 minutes). Current guidelines suggest considering termination of resuscitation if: - Asystole persists throughout the resuscitation. - There are no reversible causes identified (see Hs and Ts below). - The patient does not respond to interventions. - The arrest interval is prolonged (>20-30 minutes without any signs of improvement). However, in the hospital setting or if a reversible cause is suspected (such as hyperkalemia, toxin, or severe hypothermia), resuscitation may continue longer. The decision to terminate is a clinical judgment made by the team leader and, where applicable, a physician. **The Hs and Ts: Systematic Search for Reversible Causes** Every cardiac arrest, especially non-shockable rhythms, must trigger a systematic search for reversible, treatable causes. Failing to identify and treat a reversible cause means the patient will arrest again even if ROSC is achieved. The mnemonic is the **Hs and Ts:** **The Hs (Metabolic and Respiratory):** 1. **Hypovolemia:** Severe blood loss, dehydration, or fluid shifts (burn, pancreatitis, sepsis). Look for signs: pale skin, collapsed neck veins, and history of hemorrhage. Treatment: rapid fluid resuscitation, blood products, control of bleeding. 2. **Hypoxia:** Insufficient oxygen delivery (airway obstruction, severe pneumonia, ARDS, near-drowning). Look for: low oxygen saturation before arrest, cyanosis, unilateral breath sounds. Treatment: secure airway, high-flow oxygen, positive pressure ventilation, identify and treat underlying lung disease. 3. **Hydrogen ion (Acidosis):** Severe metabolic acidosis (from sepsis, renal failure, lactic acidosis) depresses cardiac contractility. Look for: Kussmaul respirations (if pre-arrest), known renal disease, sepsis. Treatment: treat the underlying cause; sodium bicarbonate may be considered in severe acidosis or if specific toxin ingestion (such as tricyclic antidepressant or salicylate). 4. **Hypo-/Hyperkalemia:** Abnormal potassium levels cause dysrhythmias and cardiac arrest. Look for: peaked T-waves (hyperkalemia) or flattened T-waves (hypokalemia) on the pre-arrest ECG, renal failure, dialysis patient, heavy diuretic use, or potassium supplement overdose. Treatment: hyperkalemia requires insulin plus glucose, calcium gluconate (to stabilize the myocardium), and potassium-binding agents; hypokalemia requires potassium replacement. 5. **Hypothermia:** Core body temperature <30°C (86°F) causes severe bradycardia and a "can be resuscitated until warm" phenomenon. Look for: cold exposure history, coma, apparent pulselessness (pulse may be undetectable in severe hypothermia despite living patient). Treatment: very slow rewarming (passive external rewarming for mild hypothermia, active external and internal rewarming—ECMO or extracorporeal rewarming—for severe hypothermia), limit CPR interruptions, give IV drugs but space them further apart until patient is rewarmed above 30°C, and patience (some severely hypothermic patients have neurologically intact survival even after hours of CPR and rewarming). **The Ts (Mechanical and Toxicologic):** 1. **Tension Pneumothorax:** Air in the pleural space under pressure collapses the lung and shifts the mediastinum, stopping venous return. Look for: trauma or mechanical ventilation history, unilateral absent breath sounds, tracheal deviation, hypotension, distended neck veins, cyanosis. Treatment: immediate needle decompression (large-bore needle into the 2nd intercostal space, midclavicular line) followed by chest tube. 2. **Tamponade (Cardiac Tamponade):** Fluid around the heart under pressure restricts filling. Look for: trauma, recent cardiac procedure, pericarditis, or cancer involving the pericardium. Physical signs (Beck's triad) are hypotension, muffled heart sounds, and distended neck veins. Treatment: pericardiocentesis (needle aspiration of pericardial fluid). 3. **Toxins:** Drug overdose (opioid, benzodiazepine, local anesthetic, stimulants, anticholinergics, anticholinesterase, cyanide, carbon monoxide, corrosive chemicals). Look for: history of substance use, empty medication bottles, environmental exposure. Treatment: specific antidotes if available (naloxone for opioid, flumazenil for benzodiazepine, hydroxocobalamin for cyanide, methylene blue for methemoglobinemia), supportive care, and decontamination if chemical. 4. **Thrombosis (Pulmonary Embolism or Acute Coronary Syndrome):** Massive PE or acute MI causes sudden cardiac arrest. Look for: risk factors (surgery, immobility, malignancy for PE; chest pain or risk factors for MI), unilateral leg swelling and pain (PE), ECG changes (STEMI). Treatment: for PE, consider thrombolysis (alteplase, tenecteplase) or emergent embolectomy; for MI, treat as acute coronary syndrome (aspirin, antiplatelet agents, anticoagulation, urgent angiography). **Epinephrine in Cardiac Arrest: Dose and Concentration (Critical for NLE)** This is a high-yield NLE point that must be committed to memory: - **Cardiac arrest epinephrine: 1 mg IV/IO every 3 to 5 minutes, 1:10,000 concentration** (1 mg in 10 mL of normal saline). Do **NOT** confuse this with: - **Anaphylaxis epinephrine: 0.3 to 0.5 mg IM, 1:1,000 concentration** (used for acute allergic reaction). - **Subcutaneous epinephrine in asthma: 0.3 to 0.5 mg SC, 1:1,000** (rarely used now; inhaled beta-agonists preferred). If you give 1:1,000 concentration in cardiac arrest, you would overdose the patient by 10-fold, risking severe hypertension, tachycardia, myocardial ischemia, and other complications. The correct concentration for arrest is **1:10,000**, meaning 1 mL of 1:1,000 diluted in 9 mL of saline to make 10 mL total. **Post-ROSC (Return of Spontaneous Circulation) Management** Once ROSC is achieved (a perfusing rhythm with pulse, blood pressure, and signs of life), the priorities shift: 1. **Airway and Breathing:** Secure the airway if not already done. Maintain oxygen saturation at 94-98%; avoid hyperoxia (>100%), which worsens outcomes in some conditions. If intubated, set a target ETCO2 (end-tidal carbon dioxide) of 35-40 mmHg; hyperventilation lowers ETCO2 and reduces cerebral perfusion. 2. **Perfusion Support:** If systolic blood pressure is <90 mmHg or MAP <65 mmHg, initiate vasopressor support (dopamine, norepinephrine) to maintain organ perfusion. 3. **Targeted Temperature Management:** For comatose patients after cardiac arrest, induce mild hypothermia (32-34°C) or at least prevent fever (maintain normothermia 36-37°C) for 24 hours to reduce post-arrest brain injury. 4. **Identify and Treat Cause:** ECG, troponin, lactate, imaging as needed. If STEMI, arrange emergent cardiac catheterization. If PE is suspected, perform imaging (CT angiography) and arrange embolectomy or thrombolysis if indicated. 5. **Seizure Prophylaxis and Neuroprotection:** Seizures are common post-arrest; manage with benzodiazepines and phenytoin or levetiracetam as needed. Maintain normocapnia, normoxia, and controlled blood sugar to protect the brain. 6. **Family Communication:** Inform the family of the arrest, the response, and the current status. Resuscitation is emotionally traumatic; compassionate, clear communication helps families understand the interventions and the prognosis.

Choking is foreign-body airway obstruction (FB-AO) and is classified by severity: **mild (partial) obstruction** versus **severe (complete) obstruction.** The distinction is critical because it determines whether you intervene manually or allow the patient to self-clear. **Mild (Partial) Airway Obstruction:** In mild obstruction, air can still move past the obstruction. The patient can: - Cough forcefully. - Speak in a hoarse voice or with difficulty. - Produce stridor (high-pitched breathing sound) or wheeze. - Have some degree of air exchange. **Management of Mild Obstruction:** **Encourage continued coughing and do not intervene manually.** A forceful cough is the most effective way to expel a foreign body; manual intervention can push the object deeper. Position the patient upright, reassure them, and allow them to cough. Monitor closely for worsening; if the obstruction progresses to severe, then begin manual maneuvers. If the cough becomes ineffective or the patient loses the ability to speak, the obstruction has become severe—transition to severe obstruction management immediately. **Severe (Complete) Airway Obstruction:** In severe obstruction, little or no air moves. The patient: - Cannot cough effectively (weak or silent cough). - Cannot speak or can only whisper. - May clutch the throat (the **universal choking sign**). - May wheeze weakly or not at all. - Will rapidly become cyanotic (blue discoloration) if not relieved. - Will lose consciousness if the airway is not cleared within minutes. **Management by Age Group:** **Responsive Adult or Child (Age >1 year): Abdominal Thrusts (Heimlich Maneuver)** 1. **Recognize the emergency:** Look for inability to speak, weak or absent cough, cyanosis, or the universal choking sign (hand clutching the throat). 2. **Stand behind the patient** (or position yourself to the side if the patient is very large or pregnant). 3. **Place your fist just above the navel and below the xiphoid process** (about 2-3 cm above the navel line). Your thumb should face inward toward the patient's abdomen. 4. **Grasp your fist with your other hand** and deliver **quick, forceful inward and upward thrusts** toward the patient's epigastrium. The goal is to compress the abdomen and force air up the trachea, expelling the object. 5. **Repeat until the object is expelled or the patient becomes unresponsive.** If the patient coughs out the object or begins breathing/speaking, stop and monitor for completeness of clearing and any remaining fragments or injury. **Special Populations:** - **Pregnant or Obese Patient:** Use **chest thrusts** instead of abdominal thrusts. Position your fist on the lower half of the sternum (same position as for chest compressions during CPR) and deliver quick, firm inward thrusts. This avoids abdominal compression, which could injure the gravid uterus or compress solid organs. **Responsive Infant (Age <1 year): Back Slaps and Chest Thrusts** Infants have a shorter neck, a larger head, and softer abdominal organs; abdominal thrusts are contraindicated because they risk liver, spleen, or internal injury. Instead: 1. **Support the infant on your forearm**, with the infant's face downward, jaw and chest resting on your hand and forearm, your hand supporting the jaw and cheeks (not the soft neck). 2. **Deliver 5 back slaps** between the shoulder blades using the heel of your other hand, forceful enough to dislodge the object. 3. **After 5 back slaps, turn the infant over** (keeping support of the head/neck) **to a supine position.** 4. **Deliver 5 chest thrusts** using the same position and technique as infant CPR compressions (two fingers on the sternum, just below the nipple line), but each thrust is a single, quick, forceful compression rather than a series of compressions. 5. **Repeat the cycle:** 5 back slaps + 5 chest thrusts, until the object is expelled or the infant becomes unresponsive. **If the Choking Victim Becomes Unresponsive:** 1. **Lower the patient to the ground carefully** (do not risk your own safety). 2. **Activate emergency response** (call 911 or equivalent). 3. **Begin CPR starting with compressions** (C-A-B sequence). The compressions themselves may help dislodge the object, and they will circulate oxygenated blood if the object cannot be cleared. 4. **Each time you open the airway for rescue breaths** (i.e., when you perform the head-tilt/chin-lift or jaw-thrust to position the airway before delivering breaths), **look directly into the mouth.** If you see a foreign object, **remove it with a finger sweep** (using a hooking motion to dislodge it from the posterior pharynx). However, **never perform a blind finger sweep** (poking into the mouth without seeing the object), as this risks pushing the object deeper into the airway. 5. **Attempt to ventilate.** If the chest does not rise, reposition the head and try again. If the chest still does not rise, assume obstruction and continue compressions; the compressions may eventually dislodge or compress the object enough to allow ventilation. 6. **Do not interrupt CPR to search for the object;** the priority is circulation and oxygenation. **Coughing an Object Into the Lungs (Incomplete Clearing):** Occasionally, a patient will cough or be thrust-cleared of a choking object, but the object ends up in the right mainstem bronchus (the most common site due to its more vertical angle). The patient may then present with: - Unilateral decreased breath sounds on the right. - Hypoxia that is resistant to oxygen therapy. - Recurrent pneumonia on the right side. - A history of choking followed by recovery. This situation requires **rigid or flexible bronchoscopy** to retrieve the object and is beyond the scope of immediate resuscitation, but it is important to recognize post-choking complications. **Distinguishing Choking from Other Causes of Acute Airway Distress:** - **Anaphylaxis:** Rapid onset of throat tightness, urticaria, wheezing, or edema; treat with epinephrine IM, not thrusts. - **Asthma or Acute Bronchospasm:** Wheezing, no recent choking history, use of inhalers; treat with beta-agonists and corticosteroids. - **Foreign Body Aspiration (Food or Vomitus):** May have a history of choking or aspiration; if unresponsive, manage with CPR and clear visible objects from the mouth. - **Epiglottitis or Croup:** Fever, viral prodrome, inspiratory stridor; not choking; do not attempt thrusts; maintain airway patency and prepare for intubation if needed.

Resuscitation is not a solo act—it is a high-stress, time-pressured team endeavor. The quality of outcomes depends not only on the technical skills of individual team members but on how well the team communicates, organizes, and coordinates. As a BSN graduate and licensed nurse in the Philippine healthcare system, you may be the first responder at the bedside, a key team member during a code, or the team leader. Understanding team dynamics, role assignment, communication strategies, and post-event debriefing prepares you to lead effectively and to follow safely and supportively. **Team Structure and Role Assignment** Clear role assignment prevents duplication, confusion, and critical gaps. In a hospital code, typical roles include: 1. **Team Leader (Code Leader):** Usually a physician, senior nurse, or advanced practice provider. Responsibilities include: - Directing the overall resuscitation effort. - Making decisions about the plan (e.g., when to intubate, when to push medications, when to pause for reassessment). - Verbalizing the plan clearly so all team members understand the current status and the next steps. - Calling out time intervals ("2 minutes compressions, we're at second shock"). - Monitoring team performance and morale. 2. **Compression Team (Compressions Lead and Compressor):** At least one dedicated person performing compressions; ideally, a backup ready to swap every 2 minutes. - Focus is solely on high-quality compressions: rate 100-120/min, depth 5-6 cm, full recoil. - Call out the compression count ("...28, 29, 30") to coordinate with the ventilator. 3. **Airway Manager:** Responsible for opening the airway, delivering rescue breaths or managing an advanced airway (endotracheal intubation, King airway, etc.). - Initially delivers two rescue breaths after every 30 compressions (30:2 ratio). - Once an advanced airway is placed, switches to delivering one breath every 6 seconds (about 10 breaths/min) without pausing compressions. - Monitors tube placement, breath sounds, and ventilation parameters (ETCO2 if available). 4. **IV/IO Lead (Medication Administrator):** Establishes vascular access and administers medications. - In cardiac arrest, IV or intra-osseous (IO) access is necessary for epinephrine, antiarrhythmics, and other drugs. - Timing of drugs is critical and is coordinated by the team leader (e.g., "Epinephrine now" after the second shock in a shockable rhythm). - All medications must be labeled with name, dose, time, and route to prevent errors. 5. **AED/Defibrillator Lead:** Operates the AED or manual defibrillator. - Ensures pads are applied correctly, analyzes rhythm, clears the patient, and delivers shocks as advised. - Coordinates rhythm analysis with the team leader ("Analyzing... stand clear... shock advised...") to prevent confusion and minimize interruptions. 6. **Runner/Scribe:** Documents events in real-time or fetches additional equipment/supplies. - In a hospital, this may be a nurse or clerk who records the time of each shock, the time each medication is given, CPR quality feedback, and any changes in rhythm or vital signs. - This documentation is essential for later review and for communication with incoming advanced life support or the receiving hospital. **Communication: Closed-Loop and Clear Messaging** In a chaotic resuscitation, miscommunication is a frequent cause of near-misses and errors. **Closed-loop communication** prevents this: 1. **The Team Leader Gives a Clear, Specific Order:** - "I need someone to push 1 mg epinephrine IV right now." - "Stop compressions for a rhythm check; I need everyone clear of the patient." - "Compress harder; I want a depth of 5 to 6 cm." 2. **The Person Receiving the Order Repeats It Back (Acknowledge):** - "Copy, pushing 1 mg epi IV now." - "Everyone clear, analyzing rhythm." - "Increasing compression depth to 5 to 6 cm." 3. **The Person Reports When the Task Is Complete:** - "Epinephrine 1 mg IV pushed at 4 minutes into arrest." - "Rhythm analyzed: still VF." - "Compressions resumed at 110 per minute, depth 5.5 cm." This three-step process eliminates the assumption that an order was heard, understood, and executed; in a loud, stressful environment, assumptions kill patients. Everyone speaks up; the team leader listens and repeats understanding; confirmation completes the loop. **Continuous Quality Feedback and Error Flagging** A strong resuscitation team has a culture where **anyone can flag a safety concern without fear of retribution.** - A junior nurse notices compressions are becoming shallow: "I'm noticing compression depth is decreasing; do we need a fresh compressor?" - A respiratory therapist hears breath sounds are unilateral after intubation: "Left breath sounds only; tube may be in the right mainstem; should we check tube placement?" - A pharmacist notices a dose about to be given is double what was just pushed: "Wait—I see epi was just given; let's confirm this next dose is at the right timing." The team leader acknowledges the concern, verifies it, and corrects course if needed. This is not about hierarchy; it is about patient safety. A culture where speaking up is welcomed saves lives. **Using Quantitative Feedback Devices and Monitoring Tools** Where available, **compression feedback devices** and **end-tidal carbon dioxide (ETCO2) monitoring** provide objective, real-time data: - **Compression Feedback Devices:** A sensor on the patient's chest or on the compressor's hands measures the depth and rate of compressions and provides audible or visual feedback. This helps the compressor maintain quality and is far more accurate than a rescuer's subjective feeling. - **ETCO2 Monitoring:** A capnograph measures the carbon dioxide concentration in exhaled breath. In a healthy person, ETCO2 is 35-45 mmHg. In cardiac arrest, ETCO2 is very low (often <10 mmHg) because cardiac output is near zero. A sudden rise in ETCO2 (often above 20-30 mmHg) is an **early sign of ROSC** before blood pressure returns, before a pulse is palpable. If ETCO2 suddenly rises during CPR, pause briefly to check for a pulse and signs of ROSC. ETCO2 also helps avoid excessive ventilation: if ETCO2 is above 50 mmHg, reduce the ventilation rate. **Two-Minute Checkpoint: Rhythm Analysis and Team Debrief** Every 2 minutes, the team pauses compressions briefly to analyze the rhythm and reassess the situation: 1. **Pause Compressions (≤10 seconds total):** The compressor stops, the team leader or designated person analyzes the rhythm on the monitor. 2. **Call out the Rhythm:** "Still VF," "PEA," "Organized rhythm, check pulse." (If an organized rhythm is present, quickly verify a pulse. If pulse is present, transition to post-ROSC care; if no pulse, resume compressions for "PEA.") 3. **Confirm Plan:** "Continuing CPR, next epi at 4 minutes." "Shock is advised, everyone clear." "Still no reversible cause identified; let's reassess the Hs and Ts." 4. **Mini-Debrief:** "Compressions quality looked good; depth 5.5 cm, rate 110. Breath sounds bilateral. How's access?" Briefly assess what's working and what needs adjustment. 5. **Resume:** A fresh compressor takes over at the 30-compression mark of the next cycle. **Managing Fatigue and Maintaining Team Morale** Resuscitations are physically and emotionally demanding. A code that lasts longer than 20-30 minutes can demoralize even experienced team members, especially if there are no signs of response. The team leader must: - **Rotate roles:** The compressor switches every 2 minutes; other roles can be rotated every 5-10 minutes as needed. - **Provide reassurance:** "The rhythm hasn't changed, but compressions are high-quality. Let's continue." "I know this is hard; we're doing everything right." - **Acknowledge uncertainty:** "This patient has no clear reversible cause. If there's no response in the next cycle, we'll reassess whether to continue." - **Recognize contributions:** After the event, thank the team, acknowledge what went well, and address what could be improved without blame. **Documentation: The Code Record** Accurate, real-time documentation is essential for multiple reasons: 1. **Patient Safety:** The record shows which drugs were given, at what times, in what doses. If the patient survives and is transferred to another facility, this information is critical. 2. **Quality Improvement:** After the code, the team reviews the record to identify what went well and what could be improved. 3. **Legal and Ethical:** In case of a poor outcome, the record documents that evidence-based care was provided. 4. **Family Communication:** The record provides factual information about the resuscitation effort when speaking with family members. The scribe or designated recorder documents: - **Time of arrest:** When the patient was found unresponsive. - **Time of first CPR:** When compressions began. - **Time of first shock:** When and which rhythm was present. - **Medications:** Drug name, dose, route (IV/IO), and exact time. - **Rhythm checks:** The rhythm at each 2-minute analysis (e.g., "4 min: still VF," "6 min: organized narrow complex, check pulse, pulse present = ROSC"). - **Reversible cause search:** What was assessed ("No signs of trauma, breath sounds bilateral, no distended neck veins, no evidence of tension pneumothorax"). - **Key events:** ("Advanced airway placed at 8 minutes," "ROSC achieved at 12 minutes"). - **Outcome:** ("ROSC achieved with return of spontaneous circulation and palpable pulse at 12 minutes. Patient transferred to ICU on dopamine infusion.") or ("Resuscitation discontinued after 30 minutes with no change in rhythm; pronounced dead at 23:15."). **Post-Resuscitation Debriefing** After the resuscitation (whether the outcome was survival, cardiac arrest with no ROSC, or any outcome), conduct a brief team debriefing: 1. **Gather the Team:** All staff involved meet for 5-10 minutes, ideally in a quiet place away from the patient area. 2. **Acknowledge Emotions:** "This was a difficult situation. Everyone worked hard. Let's talk about what happened." 3. **Recognize Strengths:** "Compressions were high-quality throughout. Medications were timed perfectly. Great closed-loop communication." 4. **Identify Opportunities for Improvement:** "I noticed the rhythm was analyzed twice before we got the defibrillator ready; we could streamline the AED setup. Next time, we'll have pads ready in the first minute." 5. **Avoid Blame:** Focus on the system, not the person. "The medication was the right one but was given at the wrong time; let's clarify the medication timing protocol." 6. **Support Staff:** If this was a colleague or a patient known to the team, acknowledge grief and offer support. "Dr. Santos was a friend to many of us. That makes this harder. Please use the employee assistance program if you need to talk." Research shows that debriefing improves team performance on future codes, reduces psychological burden, and promotes a culture of learning rather than blame.