Purpose: These nine emergencies share one theme — early recognition saves lives, and the nurse is usually the first to notice. The NCLEX loves them because they force you to apply the frameworks (ABCs, prioritization, "assess then act") under time pressure. In every one of these, the deterioration is often subtle before it becomes obvious. The nurse who catches the early warning signs — a rising respiratory rate, a slightly altered mental status, a widening pulse pressure — is the one who changes the outcome.

Each emergency below follows this structure: Definition → Brief Pathophysiology → Early Warning Signs → Priority Assessment → Immediate Nursing Actions → NCLEX Clinical Judgment Points → Common Traps → Key Pearl. The three items you asked for — early warning signs, priority assessment, immediate actions — are called out explicitly for every condition.

The universal opening move: In almost every emergency, the correct first action is to assess/support the ABCs and stay with the client while calling for help — not to leave to find the provider, and not to chart. Support airway, breathing, circulation; give oxygen; get the client positioned and monitored; then notify and intervene per protocol.

Sepsis

Definition. A life-threatening organ dysfunction caused by a dysregulated body response to infection. Septic shock is sepsis plus persistent hypotension requiring vasopressors and elevated lactate despite fluids.

Pathophysiology. Infection triggers a massive inflammatory cascade → widespread vasodilation and capillary leak → relative hypovolemia, maldistributed blood flow, and tissue hypoperfusion → cells shift to anaerobic metabolism → lactate rises and organs begin to fail.

Early warning signs.Subtle and easy to miss: fever OR hypothermia, tachycardia, tachypnea (often the earliest sign), and new confusion/altered mentation. Warm, flushed skin with a bounding pulse in early ("warm") sepsis; a rising lactate is a red flag even before blood pressure drops.

Priority assessment. Vital signs and trends, mental status, temperature, urine output, and lactate. Look for the source of infection. Watch for the shift from warm/compensated to cold/decompensated shock (cool, mottled skin, falling BP, dropping urine output).

Immediate nursing actions (Surviving Sepsis "Hour-1 Bundle"). Within one hour: (1) measure lactate (remeasure if > 2 mmol/L); (2) obtain blood cultures BEFORE antibiotics; (3) administer broad-spectrum antibiotics; (4) give 30 mL/kg crystalloid for hypotension or lactate ≥ 4 mmol/L; (5) start vasopressors if hypotensive during/after fluids to keep MAP ≥ 65 mmHg (Surviving Sepsis Campaign; Evans et al., 2021). Also: high-flow oxygen, cardiac/O2 monitoring, hourly urine output.

NCLEX clinical judgment points. Cultures come before antibiotics — but antibiotics must not be significantly delayed. Tachypnea and new confusion are early cues; don't wait for hypotension. Rising lactate = worsening perfusion.

Common traps. Giving antibiotics before drawing cultures. Waiting for a fever (elderly and immunocompromised clients may be hypothermic or afebrile). Missing early sepsis because the client is warm and "looks okay."

Key pearl.Cultures first, then antibiotics, then fluids — all within the hour. Tachypnea and confusion are your early alarm.

Shock (all types)

Definition. A state of inadequate tissue perfusion and oxygen delivery. Main types: hypovolemic (blood/fluid loss), cardiogenic (pump failure), distributive (septic, anaphylactic, neurogenic — massive vasodilation), and obstructive (e.g., tamponade, tension pneumothorax, PE).

Pathophysiology. Whatever the cause, the end result is the same: cells don't get enough oxygen → anaerobic metabolism → lactic acidosis → cell death and organ failure if uncorrected.

Early warning signs (compensated stage — the golden window).Tachycardia and tachypnea first, restlessness/anxiety, cool and clammy skin (except early distributive shock, which is warm), and a narrowing pulse pressure. Blood pressure is often maintained early by compensation — a normal BP does NOT rule out shock.

Priority assessment. ABCs, level of consciousness, vital-sign trends (especially HR and pulse pressure before a BP drop), skin (temperature, color, capillary refill), and urine output (< 30 mL/hr signals poor renal perfusion). Identify the type/cause.

Immediate nursing actions. Ensure airway and give high-flow oxygen; establish two large-bore IVs; position the client flat/supine (modified Trendelenburg is no longer routinely recommended); give IV fluids for hypovolemic/distributive shock; control bleeding if present; anticipate vasopressors. Cardiogenic shock is the exception — these clients are fluid-overloaded, so aggressive fluids can worsen them; support the pump instead.

NCLEX clinical judgment points. Catch shock in the compensated stage (tachycardia, restlessness, narrowing pulse pressure) — waiting for hypotension means the client is already decompensating. Match treatment to type: fluids for hypovolemic/distributive, not large fluid boluses for cardiogenic.

Common traps. Being reassured by a "normal" blood pressure. Giving aggressive fluids in cardiogenic shock. Treating restlessness as anxiety instead of hypoxia/hypoperfusion.

Key pearl.Restlessness + tachycardia + narrowing pulse pressure = shock until proven otherwise, even with a normal BP.

Respiratory Failure

Definition. The lungs can't adequately oxygenate the blood (type I, hypoxemic) and/or can't remove CO2 (type II, hypercapnic).

Pathophysiology. Failure of gas exchange or ventilation → falling PaO2 and/or rising PaCO2 → tissue hypoxia and respiratory acidosis. Causes range from pneumonia and ARDS to COPD exacerbation, opioid overdose, and neuromuscular disease.

Early warning signs.Restlessness, anxiety, and confusion are early hypoxia signs (the brain is exquisitely oxygen-sensitive). Increasing respiratory rate and effort, accessory muscle use, nasal flaring, and dyspnea. Cyanosis is a LATE sign. A rising CO2 causes drowsiness and headache.

Priority assessment. Airway patency, respiratory rate/depth/effort, O2 saturation, breath sounds, mental status, and ABGs (the definitive measure). Watch for a silent chest or a falling RR/effort after prolonged distress — that's exhaustion, an ominous sign.

Immediate nursing actions. Position upright (High Fowler's), apply oxygen titrated to target (be cautious with high-flow O2 in chronic CO2 retainers, but never withhold oxygen from a hypoxic client), encourage/assist breathing, suction if needed, and prepare for possible non-invasive ventilation or intubation. Stay with the client and call for help/rapid response.

NCLEX clinical judgment points. Early hypoxia = restlessness and confusion, not cyanosis. A client who was working hard to breathe and suddenly becomes calm/sleepy with a slowing rate may be tiring out and heading toward arrest — escalate immediately.

Common traps. Waiting for cyanosis or a very low sat to act. Withholding oxygen entirely from a COPD client (titrate, don't withhold). Mistaking the quiet, tiring client for an improving one.

Key pearl.Confusion and restlessness are early hypoxia; cyanosis is late. A suddenly calm, sleepy patient in respiratory distress is failing, not improving.

Myocardial Infarction (MI)

Definition. Death of heart muscle from prolonged interruption of coronary blood flow, usually a ruptured plaque with clot.

Pathophysiology. Coronary occlusion → myocardium distal to the blockage becomes ischemic then infarcts → risk of lethal arrhythmias, heart failure, and cardiogenic shock. "Time is muscle."

Early warning signs. Classic: substernal crushing chest pain/pressure, possibly radiating to the left arm, jaw, or back; diaphoresis; nausea; dyspnea; sense of impending doom. Atypical presentations (women, elderly, diabetics): fatigue, indigestion, shortness of breath, or jaw/back pain without classic chest pain — a high-yield NCLEX point.

Priority assessment. Pain (onset, quality, radiation), vital signs, 12-lead ECG within 10 minutes, cardiac troponins, and continuous cardiac monitoring for arrhythmias. Assess oxygenation and mental status.

Immediate nursing actions — remember MONA (given as indicated, not a rigid order).Morphine (for pain unrelieved by nitro), Oxygen (only if sat < 90% or in distress), Nitroglycerin (check BP first — hold if hypotensive), Aspirin (chewable, unless contraindicated). Plus: put the client on a monitor, obtain the ECG, establish IV access, keep the client at rest, and prepare for reperfusion (PCI is preferred; fibrinolytics if PCI unavailable in time).

NCLEX clinical judgment points.Aspirin (chewed) and an ECG are top early priorities. Check blood pressure before nitroglycerin. Recognize atypical MI in women/elderly/diabetics. New chest pain + diaphoresis is a "see-first / act-now" situation.

Common traps. Giving nitroglycerin without checking BP (can cause severe hypotension). Applying oxygen to everyone (only if hypoxic per current guidelines). Dismissing atypical symptoms in high-risk groups.

Key pearl.Chew aspirin, get the 12-lead in 10 minutes, and check BP before nitro. Atypical MI (fatigue, jaw pain, SOB) is real — especially in women, elders, and diabetics.

Stroke (Cerebrovascular Accident)

Definition. Sudden loss of brain function from interrupted blood flow — ischemic (clot, ~87%) or hemorrhagic (bleed). Treatment differs completely, so distinguishing them is critical.

Pathophysiology. Ischemic: an artery is blocked, and brain tissue downstream dies without oxygen. Hemorrhagic: a vessel ruptures, causing bleeding, pressure, and damage. "Time is brain."

Early warning signs — BE-FAST.Balance loss, Eye/vision changes, Face drooping, Arm weakness (usually one-sided), Speech difficulty (slurred/aphasia), Time to call 911. Also sudden severe headache ("worst of my life" suggests hemorrhagic), confusion, and one-sided numbness.

Priority assessment. Airway and swallowing (aspiration risk), neuro checks (NIH Stroke Scale, LOC, pupils), exact time of symptom onset / last known well (determines thrombolytic eligibility), blood glucose (rule out hypoglycemia mimicking stroke), and blood pressure. A non-contrast CT is the priority diagnostic — it must rule out hemorrhage before any clot-buster.

Immediate nursing actions. Protect the airway, keep the client NPO until swallow screen, position with head of bed per protocol (often flat or 0–30° for ischemic to support perfusion, elevated for hemorrhagic/increased ICP — follow orders), establish the onset time, get the client to CT emergently, and for eligible ischemic strokes prepare for IV thrombolysis within 4.5 hours (alteplase 0.9 mg/kg or tenecteplase 0.25 mg/kg) and/or mechanical thrombectomy (Powers et al. / 2026 AHA/ASA guideline).

NCLEX clinical judgment points.Establish onset time immediately — it gates thrombolytic eligibility (up to 4.5 hours for IV lytics). Never give a thrombolytic before CT rules out hemorrhage. Check glucose early — hypoglycemia mimics stroke. Keep NPO until swallowing is cleared.

Common traps. Giving a clot-buster without a CT (fatal in hemorrhagic stroke). Not documenting the last-known-well time. Feeding or medicating orally before a swallow screen. Aggressively lowering BP in ischemic stroke (some permissive hypertension is allowed).

Key pearl.BE-FAST, nail down the onset time, CT before any thrombolytic, and keep them NPO. Hemorrhagic vs. ischemic changes everything.

Acute Kidney Injury (AKI)

Definition. A rapid decline in kidney function over hours to days, causing retention of waste (rising BUN/creatinine) and fluid/electrolyte imbalance. Categories: prerenal (poor perfusion), intrarenal (kidney damage, e.g., ATN, nephrotoxins), postrenal (obstruction).

Pathophysiology. Kidneys fail to filter → nitrogenous waste, potassium, and fluid accumulate → hyperkalemia (arrhythmia risk), metabolic acidosis, and fluid overload.

Early warning signs.Decreasing urine output (oliguria, < 0.5 mL/kg/hr or < 30 mL/hr) is often the earliest sign, plus a rising creatinine/BUN. Later: edema, weight gain, hypertension, fatigue, and signs of hyperkalemia.

Priority assessment.Urine output (hourly if unstable), daily weights (best fluid-status indicator), and potassium. Assess fluid status (edema, lung sounds, JVD), BP, and cardiac rhythm. Review nephrotoxic meds (NSAIDs, aminoglycosides, contrast dye).

Immediate nursing actions. Monitor and strictly record I&O and daily weight, watch potassium and the ECG (peaked T waves = hyperkalemia emergency), hold/adjust nephrotoxic drugs, manage fluids per orders, and prepare for possible dialysis in severe hyperkalemia, fluid overload, or acidosis. Treat hyperkalemia (calcium gluconate to protect the heart, insulin+glucose, kayexalate/patiromer, etc., per orders).

NCLEX clinical judgment points.Hyperkalemia is the most immediately life-threatening complication — it causes fatal arrhythmias. Falling urine output is the early cue. Daily weight is the most reliable fluid indicator (1 kg ≈ 1 L).

Common traps. Focusing on creatinine while missing a dangerous potassium. Giving potassium-containing fluids or K-sparing drugs to an AKI client. Missing early oliguria. Overlooking recent contrast dye or NSAID use as a cause.

Key pearl.Watch the potassium and the urine output. In AKI, hyperkalemia is what kills first — peaked T waves mean act now.

Diabetic Emergencies (DKA, HHS, Hypoglycemia)

Definition. Three distinct emergencies: Hypoglycemia (blood glucose < 70), Diabetic Ketoacidosis (DKA) — typically Type 1, high glucose + ketones + acidosis, and Hyperosmolar Hyperglycemic State (HHS) — typically Type 2, extremely high glucose (often > 600) without significant ketosis.

Pathophysiology.Hypoglycemia: too little glucose for the brain → rapid neuro symptoms. DKA: absolute insulin lack → the body burns fat → ketones and metabolic acidosis + osmotic diuresis. HHS: enough insulin to prevent ketosis but not hyperglycemia → profound dehydration and very high osmolality.

Early warning signs.Hypoglycemia (fast onset): shakiness, sweating, tachycardia, hunger, confusion, irritability → seizures/coma. DKA: polyuria, polydipsia, nausea/vomiting, abdominal pain, fruity breath, Kussmaul (deep rapid) respirations, dehydration. HHS: extreme thirst, marked dehydration, altered mental status, no fruity breath/Kussmaul.

Priority assessment.Blood glucose first (fastest, guides everything), then LOC/neuro status, ABCs, hydration status, and — for DKA/HHS — potassium, ABGs, and ketones. Cardiac monitoring for potassium shifts.

Immediate nursing actions.Hypoglycemia — treat immediately: if conscious and able to swallow, 15 g fast carbohydrate (juice, glucose tabs), recheck in 15 min, repeat if needed ("rule of 15"), then a complex snack; if unconscious/unable to swallow, IV dextrose (D50) or IM/SubQ glucagon. DKA/HHS:IV fluids first (isotonic saline) for dehydration, then IV insulin infusion, and replace potassium — insulin drives K into cells and can cause dangerous hypokalemia; monitor K closely and don't start insulin if K is critically low until corrected.

NCLEX clinical judgment points.Hypoglycemia is treated FIRST and fastest — "when in doubt, give glucose" because the brain deteriorates in minutes. In DKA, fluids before insulin, and watch potassium as insulin shifts it into cells. Never give insulin to a hypokalemic DKA client until K is replaced.

Common traps. Confusing hypoglycemia with hyperglycemia (treating the wrong direction). Giving insulin in DKA without addressing potassium. Giving oral glucose to an unconscious client (aspiration — use IV/IM instead). Stopping treatment as soon as glucose normalizes without the follow-up snack.

Key pearl.Check the sugar first. Hypoglycemia = give glucose now (rule of 15). DKA = fluids first, then insulin, and guard the potassium.

Anaphylaxis

Definition. A severe, rapid, systemic allergic reaction that is immediately life-threatening due to airway swelling and circulatory collapse (a form of distributive shock).

Pathophysiology. Allergen exposure → massive IgE-mediated release of histamine → widespread vasodilation, capillary leak, bronchoconstriction, and laryngeal edema → airway obstruction and shock within minutes.

Early warning signs. Rapid onset (minutes) after exposure: itching, hives/urticaria, flushing, swelling of lips/tongue/throat, a sense of throat tightness or "lump," stridor/wheezing, hoarseness, anxiety, and a feeling of impending doom → progressing to hypotension and collapse.

Priority assessment.Airway first (stridor, swelling, voice change), breathing (wheeze, effort, sat), and circulation (BP, pulse). Identify and stop the trigger. This is the purest "ABC" emergency — the airway can close in minutes.

Immediate nursing actions.Epinephrine IM is the first-line, life-saving drug — give it immediately (adult 0.3–0.5 mg of 1:1000 IM, usually mid-outer thigh), repeat every 5–15 min as needed. Also: stop the allergen, call for help/rapid response, maintain the airway and give high-flow oxygen, lay the client flat with legs raised if hypotensive (unless breathing is worse lying down), establish IV access and give fluids for hypotension. Adjuncts (antihistamines, corticosteroids, bronchodilators) are secondary and never delay epinephrine.

NCLEX clinical judgment points.Epinephrine is FIRST — before antihistamines, before steroids. There is no absolute contraindication in true anaphylaxis. Airway is the immediate threat. Watch for biphasic reactions (symptoms can recur hours later).

Common traps. Giving diphenhydramine (Benadryl) or steroids first instead of epinephrine — a classic, dangerous NCLEX distractor. Delaying epinephrine to "assess further." Sending the client home without observation (biphasic risk).

Key pearl.Epinephrine first, every time. Antihistamines and steroids are add-ons — the airway won't wait for them.

Increased Intracranial Pressure (ICP)

Definition. Elevated pressure within the rigid skull from swelling, bleeding, tumor, or excess CSF. Normal ICP is ~5–15 mmHg; sustained elevation compresses and herniates the brain.

Pathophysiology. The skull is a fixed box holding brain, blood, and CSF (Monro-Kellie doctrine). If one component increases, the others must compensate; once compensation fails, ICP rises steeply → cerebral perfusion falls → ischemia and herniation.

Early warning signs.A change in level of consciousness is the earliest and most sensitive sign — restlessness, confusion, lethargy. Also: severe headache, nausea/projectile vomiting, pupillary changes (sluggish, unequal), and visual changes. Late/ominous:Cushing's triad — hypertension with widening pulse pressure, bradycardia, and irregular respirations — signals impending herniation and is a very late sign.

Priority assessment.Level of consciousness and neuro checks (GCS), pupil size/reactivity, and vital-sign trends watching for Cushing's triad. Assess motor function and for CSF leak (clear drainage from nose/ears).

Immediate nursing actions.Elevate the head of bed ~30° and keep the head/neck midline/neutral to promote venous drainage; prevent activities that spike ICP (avoid clustering care, coughing, straining/Valsalva, hip flexion, and suctioning longer than ~10 sec); keep the environment calm and quiet; maintain a patent airway and oxygenation (hypoxia and hypercapnia worsen ICP); and anticipate osmotic diuretics (mannitol, hypertonic saline) and provider notification. Avoid overhydration.

NCLEX clinical judgment points.A declining LOC is the earliest red flag — act on it before Cushing's triad appears. Cushing's triad is LATE. HOB 30°, midline neck, minimize stimulation. Hypercapnia (high CO2) dilates cerebral vessels and raises ICP, so maintain effective ventilation.

Common traps. Waiting for Cushing's triad (too late). Positioning the client flat or with the neck flexed/turned. Suctioning aggressively or clustering care (both spike ICP). Over-suctioning or hyperflexing the hips.

Key pearl.The first sign of rising ICP is a subtle LOC change — not Cushing's triad, which is a late warning. Keep the head up, midline, and the client calm.

Summary Table: Major Points

Emergency	Earliest Warning Sign	Priority Assessment	First / Key Action
Sepsis	Tachypnea + new confusion	Lactate, VS trends, mental status	Cultures → antibiotics → 30 mL/kg fluids (Hour-1 bundle)
Shock	Tachycardia, restlessness, narrowing pulse pressure	ABCs, HR, pulse pressure, urine output	O2, 2 large-bore IVs, fluids (not for cardiogenic)
Respiratory Failure	Restlessness/confusion (early hypoxia)	RR/effort, SpO2, ABGs, mental status	Upright position, titrated oxygen, prepare to ventilate
MI	Chest pressure ± atypical (jaw, SOB, fatigue)	12-lead ECG in 10 min, troponin, pain	Chew aspirin, ECG, monitor; nitro after checking BP
Stroke	BE-FAST deficits, sudden severe headache	Onset time, neuro exam, glucose, CT	NPO, CT before lytics, thrombolytic within 4.5 hr if eligible
AKI	Falling urine output (oliguria)	Urine output, daily weight, potassium/ECG	Monitor K & ECG, strict I&O, hold nephrotoxins
Diabetic emergencies	Hypoglycemia: shaky/confused; DKA: fruity breath, Kussmaul	Blood glucose FIRST, LOC, K (DKA/HHS)	Hypoglycemia: glucose now; DKA: fluids → insulin, guard K
Anaphylaxis	Throat tightness, stridor, hives, swelling	Airway first, breathing, BP	Epinephrine IM immediately
Increased ICP	Declining LOC (earliest)	LOC/GCS, pupils, Cushing's triad (late)	HOB 30°, midline neck, minimize stimulation

Five NCLEX Clinical Pearls

The earliest signs are almost always neuro or respiratory, not blood pressure. Restlessness, confusion, and a rising respiratory rate precede hypotension in sepsis, shock, respiratory failure, and rising ICP. A normal or "compensated" blood pressure is falsely reassuring.
Certain drugs/tests are sequence-locked: cultures before antibiotics (sepsis), CT before thrombolytics (stroke), BP check before nitroglycerin (MI), fluids before insulin (DKA), epinephrine before antihistamines (anaphylaxis).
Cushing's triad and cyanosis are LATE signs. If a question offers an earlier cue (LOC change for ICP, restlessness for hypoxia), that is the answer — you intervene before the late signs appear.
Potassium is the silent killer in AKI and DKA. Insulin shifts K into cells (hypokalemia risk in DKA); failing kidneys retain it (hyperkalemia in AKI). Both cause fatal arrhythmias — monitor the ECG.
"Time is tissue." MI (time is muscle) and stroke (time is brain) both hinge on rapid reperfusion — establish symptom-onset time and move fast; delays cost irreversible tissue.

Five Common Mistakes Nursing Students Make

Waiting for hypotension or cyanosis before recognizing shock or respiratory failure — the compensated/early stage is the window to act.
Reversing critical sequences: antibiotics before cultures, thrombolytics before CT, insulin before fluids/potassium, or antihistamines before epinephrine.
Leaving the client to find help or chart instead of staying, supporting ABCs, and calling for assistance/rapid response.
Missing atypical presentations — silent/atypical MI in women, elders, and diabetics; afebrile or hypothermic sepsis in the elderly and immunocompromised.
Mismanaging potassium and fluids — giving fluids in cardiogenic shock, potassium in AKI, or insulin in a hypokalemic DKA client.

Five Application Scenarios

Scenario 1 (Sepsis): A postoperative client has a temperature of 100.9°F, HR 112, RR 26, and is newly confused; BP is still 110/70. What is the nurse's priority?

— Recognize early sepsis (tachypnea + new confusion) and initiate the sepsis protocol: draw a lactate and blood cultures, then give antibiotics and begin fluids — do not wait for the blood pressure to fall.

Scenario 2 (Anaphylaxis): Minutes after an IV antibiotic starts, a client develops throat tightness, hives, and wheezing. Which action is first: stop the infusion, give diphenhydramine, administer IM epinephrine, or notify the provider?

— Administer IM epinephrine (while stopping the allergen and calling for help). Epinephrine comes before antihistamines and provider notification.

Scenario 3 (Stroke): A client arrives with sudden right-sided weakness and slurred speech; family reports symptoms began "about 2 hours ago." What must happen before any thrombolytic?

— A non-contrast CT to rule out hemorrhage, plus confirming the exact onset time and checking glucose. Thrombolytics are only for ischemic stroke within the 4.5-hour window.

Scenario 4 (Increased ICP): A head-injured client becomes increasingly difficult to arouse and confused; vital signs are still stable. What does this indicate and what should the nurse do?

— A declining LOC is the earliest sign of rising ICP. Elevate HOB ~30°, keep the neck midline, minimize stimulation, ensure oxygenation, and notify the provider — do not wait for Cushing's triad.

Scenario 5 (Diabetic emergency): A client on insulin is found diaphoretic, shaky, and confused with a fingerstick glucose of 48 mg/dL, but is awake and able to swallow. What is the priority action?

— Follow the rule of 15: give 15 g of fast-acting carbohydrate, recheck in 15 minutes, repeat if still low, then provide a complex snack. Because the client is conscious and can swallow, oral glucose is appropriate (IV dextrose/glucagon is for the unconscious client).

Key Takeaways

In nearly every emergency, the correct first move is to support the ABCs, give oxygen, stay with the client, and call for help — then intervene per protocol.
Recognize the early, subtle cues (tachypnea, restlessness, confusion, falling urine output, declining LOC) rather than waiting for the dramatic late signs (hypotension, cyanosis, Cushing's triad).
Honor the sequence-locked interventions: cultures→antibiotics (sepsis), CT→thrombolytic (stroke), BP check→nitro (MI), fluids→insulin (DKA), epinephrine-first (anaphylaxis).
Guard the potassium and the airway — hyperkalemia (AKI) and hypokalemia (DKA insulin therapy) both kill via arrhythmia, and anaphylaxis/respiratory failure kill via the airway.
Time-critical conditions (MI, stroke, sepsis) reward speed — establish onset time and act within the treatment window, because tissue lost is not recovered.

References

American Diabetes Association. (2025). Standards of care in diabetes—2025. Diabetes Care, 48(Suppl. 1). https://diabetesjournals.org/care/issue/48/Supplement_1

American Heart Association. (2020). Advanced cardiovascular life support (ACLS) provider manual. American Heart Association.

Evans, L., Rhodes, A., Alhazzani, W., Antonelli, M., Coopersmith, C. M., French, C., … Levy, M. M. (2021). Surviving Sepsis Campaign: International guidelines for management of sepsis and septic shock 2021. Critical Care Medicine, 49(11), e1063–e1143. https://doi.org/10.1097/CCM.0000000000005337

Powers, W. J., Rabinstein, A. A., Ackerson, T., Adeoye, O. M., Bambakidis, N. C., Becker, K., … Tirschwell, D. L. (2019). Guidelines for the early management of patients with acute ischemic stroke: 2019 update. Stroke, 50(12), e344–e418. https://doi.org/10.1161/STR.0000000000000211

American Heart Association/American Stroke Association. (2026). 2026 guideline for the early management of patients with acute ischemic stroke. Stroke. https://www.ahajournals.org/doi/10.1161/STR.0000000000000513

National Institute of Neurological Disorders and Stroke. (n.d.). Stroke information. https://www.ninds.nih.gov/health-information/disorders/stroke

Centers for Disease Control and Prevention. (n.d.). Sepsis. https://www.cdc.gov/sepsis/

Surviving Sepsis Campaign. (2018). Hour-1 bundle. Society of Critical Care Medicine. https://www.sccm.org/SurvivingSepsisCampaign/Guidelines/Adult-Patients

Note on evidence: Emergency management reflects current national guidelines — Surviving Sepsis Campaign (2021) and its Hour-1 bundle; 2019/2026 AHA/ASA stroke guidelines (IV thrombolysis window up to 4.5 hours, alteplase or tenecteplase); AHA ACLS for MI; and ADA standards for diabetic emergencies. Specific drug doses, positioning, and protocols vary by institution — always follow current facility policy and provider orders. Where practice is evolving (e.g., oxygen use in MI, HOB position in stroke), the most widely accepted current recommendation is given.

Must-Know Nursing Emergencies

You must be logged in to access this course

Welcome & Getting Started

Launch RN Simulator

Wellness Center

Nursing Foundations

Fundamentals & Safety

Pharmacology

Dosage Calculations

Leadership, Management & Delegation

Medical-Surgical Body Systems

Neurological System

Sensory System

Endocrine System

Respiratory System

Cardiovascular System

Hematologic/Immune/Lymphatic System

Gastrointestinal (GI) System

Renal & Genitourinary

Reproductive System

Musculoskeletal System

Integumentary System

Specialty Areas

Maternity

Infectious Diseases

Pediatrics

Mental Health

NCLEX Success Center

Clinical Judgment Practice

Prioritization Practice

Delegation Practice

Lab Values

Final Review