Shock is a high-stakes, fast-moving topic, and the NCLEX loves it, especially the neurogenic-shock reversal and the sepsis and anaphylaxis priorities. Work through these 10 practice questions on the four categories of shock, the stages, the sepsis bundle, and anaphylaxis management, each with a full rationale.
Shock: Types, Stages, Sepsis & Anaphylaxis
Shock is a life-threatening state of inadequate tissue perfusion. On the NCLEX, know the four categories (hypovolemic, cardiogenic, distributive, and obstructive) and their hallmarks. Hypovolemic (blood/fluid loss) presents with tachycardia, hypotension, cool clammy pale skin, flat neck veins, and oliguria; treat with rapid isotonic crystalloid, blood, and source control. Cardiogenic (pump failure, often a massive MI) shows hypotension WITH pulmonary congestion (crackles, dyspnea, JVD); support contractility with inotropes and give fluids cautiously because aggressive fluids worsen pulmonary edema. Distributive shock includes septic (warm/flushed and bounding early, cold late, fever, rising lactate), anaphylactic (airway swelling, wheezing, urticaria, hypotension), and neurogenic. The neurogenic distinguisher is BRADYcardia with hypotension and WARM, DRY skin from lost sympathetic tone, the opposite of the tachycardia and cool, clammy skin of the cold shocks (hypovolemic and cardiogenic). Obstructive shock comes from a mechanical block to cardiac filling or outflow, such as cardiac tamponade, tension pneumothorax, or massive pulmonary embolism; look for hypotension with JVD (tamponade or tension pneumothorax), and the priority is to relieve the obstruction (pericardiocentesis, needle decompression, or thrombolysis/embolectomy).
Recognize shock EARLY. The stages are initial, compensatory, progressive, and refractory. In the compensatory stage the body fights back with tachycardia, tachypnea, cool skin, a narrowing pulse pressure, and restlessness/anxiety and altered mental status as an early sign; this is the best time to intervene. Progressive brings frank hypotension, lactic acidosis, organ hypoperfusion, and falling urine output. Refractory is unresponsive to therapy with multi-organ failure. Red flags to memorize: altered mental status/restlessness, tachycardia, narrowing pulse pressure, and urine output under 30 mL/hr.
Management priorities are ABCs, high-flow oxygen, two large-bore IVs, isotonic fluid resuscitation, and treating the underlying cause. Monitor MAP (goal at least 65 mmHg), urine output (at least 0.5 mL/kg/hr, roughly 30 mL/hr), and lactate; full Trendelenburg is no longer recommended. For sepsis: draw lactate and blood cultures BEFORE antibiotics, give broad-spectrum antibiotics within 1 hour, infuse 30 mL/kg crystalloid for hypotension or lactate 4 or higher, and start norepinephrine first-line for MAP under 65 after fluids. For anaphylaxis: intramuscular epinephrine in the vastus lateralis is the first and most important action.
Before you start, review the hemodynamic comparison table and stages in our types of shock guide.
Shock NCLEX Practice Questions
Question 1 · Neurogenic shock
A client is admitted with a C5 spinal cord injury after a diving accident. Which set of assessment findings would the nurse expect if this client is developing neurogenic shock?
- A Tachycardia, hypotension, and cool, clammy, pale skin
- B Bradycardia, hypotension, and warm, dry skin
- C Hypertension, bradycardia, and profuse diaphoresis
- D Tachycardia, hypertension, and flushed, mottled skin
Show answer & rationale
Correct answer: B
Neurogenic shock results from loss of sympathetic tone below the level of a high spinal cord injury, causing unopposed parasympathetic activity. The hallmark triad is bradycardia, hypotension, and warm, dry skin. Because sympathetic vasoconstriction is lost, blood pools in dilated vessels (hypotension), the heart is not driven to speed up (bradycardia), and the skin stays warm and dry rather than cool and clammy. Tachycardia with cool, clammy, pale skin describes the compensatory picture of hypovolemic, cardiogenic, and early responses in most other shocks, where an intact sympathetic system raises heart rate and clamps down peripheral vessels; that is the opposite of what happens in neurogenic shock. Hypertension with bradycardia and diaphoresis suggests autonomic dysreflexia, a different SCI emergency that occurs later (typically injuries at or above T6) from a noxious stimulus such as a distended bladder, not the flaccid vasodilation of acute neurogenic shock. Tachycardia with hypertension and flushed, mottled skin fits no recognized shock pattern and is a distractor. Clinical pearl: the memory hook is warm, dry, and slow. When a spinal-injured client is hypotensive but the pulse is slow and the skin is warm instead of the usual fast pulse and cold clammy skin, think neurogenic shock. Treatment focuses on cautious fluids, vasopressors to restore tone, and atropine for symptomatic bradycardia.
Question 2 · Anaphylactic shock
A client receiving a first dose of IV cefazolin suddenly develops lip swelling, audible wheezing, hives, and a blood pressure of 78/44 mm Hg. After stopping the infusion, which action should the nurse take FIRST?
- A Administer IM epinephrine into the vastus lateralis
- B Administer IV diphenhydramine to block histamine receptors
- C Administer IV methylprednisolone to reduce inflammation
- D Place the client in the Trendelenburg position
Show answer & rationale
Correct answer: A
This client is in anaphylactic shock, a distributive shock from an IgE-mediated reaction causing massive vasodilation, increased capillary permeability, bronchospasm, and airway edema. The first and most important intervention is intramuscular epinephrine into the vastus lateralis (the anterolateral thigh). Epinephrine is the only drug that reverses the underlying pathophysiology: its alpha effects cause vasoconstriction to raise blood pressure and reduce airway swelling, and its beta effects produce bronchodilation and support cardiac output. The IM thigh route provides rapid, reliable absorption and is preferred over subcutaneous or deltoid routes. Diphenhydramine, an antihistamine, only blocks further histamine binding and cannot reverse effects already under way, so it does nothing for airway edema or hypotension; it is an adjunct given after epinephrine. Methylprednisolone, a corticosteroid, has a delayed onset of hours and does nothing for the acute crisis, so it is only an adjunct (current guidelines no longer support steroids as reliable prevention of biphasic reactions). Placing the client in Trendelenburg is outdated; full Trendelenburg is no longer recommended because it worsens breathing and does not improve perfusion, and it delays the life-saving drug. Clinical pearl: for anaphylaxis, epinephrine comes FIRST, every time. Remember the order epinephrine, airway/oxygen, IV fluids, then antihistamines and steroids as adjuncts. After giving epinephrine, the nurse secures the airway, applies high-flow oxygen, gives IV fluid boluses for hypotension, and prepares for a possible repeat epinephrine dose in 5 to 15 minutes.
Question 3 · Early recognition / compensatory stage
A nurse is monitoring a postoperative client for early (compensatory-stage) shock. Which findings should the nurse recognize as consistent with this stage? Select all that apply.
- A Urine output of 80 mL/hr
- B Heart rate of 118 beats/min
- C New restlessness and anxiety
- D Bradycardia with warm, dry skin
- E Cool, clammy skin
- F Narrowing pulse pressure
Show answer & rationale
Correct answer: B, C, E, F
In the compensatory stage of shock, the body activates the sympathetic nervous system and the renin-angiotensin-aldosterone system to preserve perfusion to the brain and heart. New restlessness and anxiety reflect early cerebral hypoperfusion and are one of the EARLIEST and most sensitive signs, making this the best time to intervene. A heart rate of 118 (tachycardia) is the body's attempt to maintain cardiac output. Cool, clammy skin results from peripheral vasoconstriction shunting blood centrally. A narrowing pulse pressure occurs because catecholamine-driven vasoconstriction raises the diastolic pressure while the systolic pressure begins to fall; a narrowing pulse pressure often precedes an obvious drop in systolic blood pressure. A urine output of 80 mL/hr is normal-to-high and is NOT a shock finding; in shock, aldosterone and reduced renal perfusion cut urine output, and less than 30 mL/hr is a warning sign, so this option is incorrect. Bradycardia with warm, dry skin is the signature of neurogenic shock, not the general compensatory response, which is tachycardia with cool skin, so it is also incorrect. Clinical pearl: watch the mental status. Restlessness and subtle confusion, along with a rising heart rate and narrowing pulse pressure, appear before the blood pressure crashes. Catching shock in the compensatory stage, rather than waiting for hypotension, is what saves the client, because once frank hypotension appears the client has already progressed.
Question 4 · Sepsis bundle sequencing
A client with suspected septic shock has these orders: obtain a serum lactate, obtain blood cultures, start broad-spectrum antibiotics, and infuse 30 mL/kg of normal saline. Which action should the nurse ensure is completed FIRST?
- A Administer the broad-spectrum antibiotics
- B Infuse the 30 mL/kg normal saline bolus
- C Start a norepinephrine infusion
- D Obtain the ordered blood cultures
Show answer & rationale
Correct answer: D
In the Surviving Sepsis hour-1 bundle, blood cultures must be drawn BEFORE antibiotics are started. Once antibiotics reach the bloodstream, they can sterilize the sample and produce falsely negative cultures, robbing the team of the data needed to identify the organism and later narrow therapy. Obtaining cultures takes only minutes and should not delay antibiotics beyond the 1-hour target, so it is done first, immediately followed by the antibiotic. Administering the broad-spectrum antibiotics is critical and must occur within 1 hour, but giving it before the cultures are drawn compromises diagnosis, so it is not the very first step. Infusing the 30 mL/kg crystalloid bolus is a core bundle element for hypotension or a lactate of 4 or higher and runs concurrently, but it is not the action that must precede the others in this list; cultures still come before antibiotics regardless of fluids. Starting norepinephrine is reserved for a MAP that remains below 65 mm Hg AFTER adequate fluid resuscitation, so it is a later step, not first-line before fluids. Clinical pearl: remember cultures before drugs. A quick sequence for the bundle is measure lactate, draw blood cultures, give antibiotics within 1 hour, bolus 30 mL/kg crystalloid, then start norepinephrine if the MAP stays under 65. Drawing cultures first is a small step that protects the entire treatment plan.
Question 5 · Cardiogenic shock
A client with a large anterior wall myocardial infarction has a blood pressure of 82/56 mm Hg, bibasilar crackles, jugular venous distention, and an oxygen saturation of 88%. Which intervention should the nurse anticipate?
- A Infuse 2 L of normal saline as rapidly as possible
- B Place the client in full Trendelenburg position
- C Administer dobutamine and give fluids cautiously
- D Administer intramuscular epinephrine into the thigh
Show answer & rationale
Correct answer: C
This client is in cardiogenic shock: the failing heart cannot pump effectively after a large MI, so blood backs up into the lungs. The crackles, jugular venous distention, and hypoxia signal pulmonary congestion and fluid overload behind a weak pump, not fluid depletion. The correct approach is to support contractility with a positive inotrope such as dobutamine, which improves the heart's pumping strength and cardiac output, while giving fluids cautiously and monitoring closely. Infusing 2 L of saline rapidly would be dangerous here; the problem is a pump that cannot move the blood it already has, so aggressive fluids worsen pulmonary edema and hypoxia. That contrasts sharply with hypovolemic shock, where rapid crystalloid is exactly right. Placing the client in full Trendelenburg is no longer recommended in any shock and would further flood the congested lungs, impair diaphragm excursion, and worsen breathing. Intramuscular epinephrine is the treatment for anaphylaxis, not cardiogenic shock; its intense effects can increase myocardial oxygen demand and worsen ischemia in an infarcting heart. Clinical pearl: distinguish the pump problem from the tank problem. When hypotension comes WITH crackles and JVD, think cardiogenic shock and go easy on fluids while supporting the pump. The goals are to improve contractility, reduce myocardial workload, maintain a MAP of at least 65 mm Hg, and provide oxygen, all while avoiding fluid overload.
Question 6 · Sepsis bundle interventions
A client is diagnosed with septic shock. Which interventions are part of the evidence-based sepsis bundle the nurse should anticipate? Select all that apply.
- A Withhold IV fluids to prevent pulmonary edema
- B Measure the serum lactate level
- C Obtain blood cultures before administering antibiotics
- D Administer broad-spectrum antibiotics within 1 hour
- E Infuse 30 mL/kg isotonic crystalloid for hypotension or a lactate of 4 or higher
- F Begin norepinephrine for a MAP below 65 mm Hg after fluid resuscitation
Show answer & rationale
Correct answer: B, C, D, E, F
The Surviving Sepsis bundle drives early, aggressive management of septic shock. Measuring serum lactate quantifies tissue hypoperfusion and guides resuscitation; a level of 4 or higher indicates significant anaerobic metabolism. Obtaining blood cultures before antibiotics preserves the ability to identify the organism and later narrow therapy. Administering broad-spectrum antibiotics within 1 hour is a time-critical, survival-linked step. Infusing 30 mL/kg of isotonic crystalloid for hypotension or a lactate of 4 or higher restores intravascular volume in this vasodilated, third-spacing state. Beginning norepinephrine for a MAP that stays below 65 mm Hg after fluids is correct because norepinephrine is the first-line vasopressor in septic shock, restoring vascular tone once the tank is filled. Withholding IV fluids to prevent pulmonary edema is incorrect and dangerous: septic shock is a distributive, fluid-responsive state, and aggressive early crystalloid is central to the bundle. That fluid caution belongs to cardiogenic shock, not sepsis. Clinical pearl: a simple bundle mnemonic is lactate, cultures, antibiotics, fluids, pressors, in that order, with cultures always before antibiotics and fluids before pressors. Reassess lactate and perfusion after the bolus. Targets include a MAP of at least 65 mm Hg, urine output of at least 0.5 mL/kg/hr, and a falling lactate, which together signal improving perfusion.
Question 7 · Hypovolemic shock
A client with an upper gastrointestinal bleed has a blood pressure of 84/60 mm Hg, heart rate of 122 beats/min, flat neck veins, cool clammy skin, and urine output of 15 mL/hr. Which intervention is the highest priority?
- A Administer an oral beta-blocker to slow the heart rate
- B Rapidly infuse isotonic crystalloid via two large-bore IVs
- C Restrict IV fluids and continue close hemodynamic monitoring
- D Start a dobutamine infusion to improve contractility
Show answer & rationale
Correct answer: B
This client is in hypovolemic shock from acute blood loss. The tachycardia, hypotension, flat neck veins (low central venous pressure), cool clammy skin, and oliguria all point to an empty intravascular tank. The priority is aggressive volume replacement: establish two large-bore IVs and rapidly infuse isotonic crystalloid such as normal saline or lactated Ringer's, with blood products to follow while the source of bleeding is controlled. Restoring circulating volume improves perfusion, blood pressure, and urine output. Administering a beta-blocker would be harmful; the tachycardia is a compensatory response keeping the client alive, and blunting it removes that compensation and can precipitate cardiovascular collapse. Restricting IV fluids is exactly backward for hypovolemic shock; fluid restriction is a consideration in cardiogenic shock with pulmonary congestion, not in a bleeding, volume-depleted client with flat neck veins. Dobutamine is an inotrope used for cardiogenic shock to support a failing pump; giving it here does not address the core problem of lost volume and could worsen hypotension through its vasodilating effect. Clinical pearl: flat neck veins plus cool, clammy skin and tachycardia scream volume loss, fill the tank. Two large-bore IVs (18 gauge or larger) allow rapid infusion. Monitor MAP (goal at least 65 mm Hg) and urine output (at least 30 mL/hr) as markers of restored perfusion, and always work to control the source of the loss.
Question 8 · Stages of shock
A nurse is caring for a client several hours after major surgery. Which finding is the EARLIEST indicator that the client may be developing shock and requires immediate further assessment?
- A New onset of restlessness and anxiety
- B Blood pressure of 78/50 mm Hg with a MAP of 59 mm Hg
- C Mottled skin and absent urine output
- D No response to a 30 mL/kg fluid bolus
Show answer & rationale
Correct answer: A
New onset of restlessness and anxiety is the earliest and most sensitive sign of shock because the brain is exquisitely sensitive to reduced perfusion. In the compensatory stage, catecholamine-driven vasoconstriction and tachycardia initially preserve blood pressure, so altered mental status, restlessness, and anxiety appear BEFORE the pressure falls, giving the nurse the best window to intervene and prevent progression. A blood pressure of 78/50 with a MAP of 59 mm Hg [MAP = (SBP + 2*DBP)/3 = (78 + 100)/3 = 178/3 = 59 mm Hg] represents the progressive stage: it is below the 65 mm Hg perfusion threshold, meaning compensatory mechanisms have already failed and frank hypotension has developed. That is a late finding, not the earliest. Mottled skin with absent urine output signals severe, prolonged hypoperfusion and organ dysfunction, consistent with the progressive-to-refractory stage, far past the first sign. No response to a 30 mL/kg crystalloid bolus reflects fluid-refractory shock, the point at which vasopressors are typically started; it is a late, ominous finding but is not automatically the terminal irreversible stage. Clinical pearl: trust the mental status change. A postoperative client who becomes restless, anxious, or subtly confused, even with a near-normal blood pressure, may be showing the first sign of shock. Do not wait for hypotension; the compensatory stage is the golden window. Pair the mental status change with early trends such as rising heart rate, narrowing pulse pressure, and declining urine output, and escalate care promptly.
Question 9 · Type differentiation
A client with a T4 spinal cord injury becomes hypotensive. Which findings would help the nurse distinguish neurogenic shock from other types of shock? Select all that apply.
- A Hypotension
- B Bradycardia
- C Warm, dry skin
- D Tachycardia
- E Cool, clammy, pale skin
- F Inability to regulate body temperature (poikilothermia)
Show answer & rationale
Correct answer: B, C, F
The stem asks which findings DISTINGUISH neurogenic shock from other shock types, so only discriminators count. Neurogenic shock is distributive shock from loss of sympathetic tone after a high spinal cord injury. Bradycardia is a key distinguisher: without sympathetic drive, unopposed vagal (parasympathetic) tone slows the heart, the reverse of the tachycardia seen in hypovolemic, cardiogenic, and early septic shock. Warm, dry skin is also distinguishing: widespread vasodilation plus loss of sympathetic sweat-gland control produce warm, dry skin instead of the cool, clammy, pale skin of other shock states. Inability to regulate body temperature (poikilothermia) reflects disrupted autonomic thermoregulation below the injury, so temperature drifts toward the environment, a finding specific to neurogenic/spinal cord injury. Hypotension is present in essentially ALL shock types and is already given in the stem, so it has no discriminating value and should not be selected. Tachycardia and cool, clammy, pale skin are compensatory findings of OTHER shock states driven by an intact sympathetic response; they are absent in neurogenic shock and therefore do not help identify it. Clinical pearl: the neurogenic distinguishers are warm, dry, and slow. When a spinal-injured client is hypotensive but the pulse is slow and the skin is warm and dry rather than fast and clammy, suspect neurogenic shock. Management centers on cautious IV fluids, vasopressors (for example norepinephrine or phenylephrine) to restore vascular tone, and atropine for symptomatic bradycardia, while maintaining spinal precautions.
Question 10 · Vasopressors and MAP goal
A client in septic shock remains hypotensive with a MAP of 58 mm Hg after receiving a 30 mL/kg crystalloid bolus. Which vasopressor should the nurse anticipate administering as first-line therapy to reach the target MAP?
- A Dopamine
- B Dobutamine
- C Norepinephrine
- D Phenylephrine
Show answer & rationale
Correct answer: C
When a client in septic shock stays hypotensive despite adequate fluid resuscitation, norepinephrine is the first-line vasopressor recommended by current Surviving Sepsis guidelines. Norepinephrine is a potent alpha-adrenergic agonist with modest beta activity, so it restores vascular tone and raises the MAP effectively while largely maintaining cardiac output, and it has a favorable safety profile compared with alternatives. The goal is a MAP of at least 65 mm Hg to sustain organ perfusion. Dopamine is no longer preferred; at the doses needed for blood pressure support it causes more tachyarrhythmias and offers no survival benefit over norepinephrine, so it is reserved for select cases. Dobutamine is an inotrope, not a first-line pressor; it supports contractility and is used when myocardial dysfunction or persistent hypoperfusion complicates sepsis, but on its own it can lower blood pressure through vasodilation. Phenylephrine is a pure alpha agonist that raises blood pressure but reflexively slows the heart and can reduce cardiac output; it is a backup agent, not first-line in septic shock. Clinical pearl: for septic shock, the sequence is fluids first, then norepinephrine to hit a MAP of at least 65. Remember norepi is the first line, dobutamine is for the pump. Vasopressors are titrated to the MAP goal while monitoring urine output of at least 0.5 mL/kg/hr and a downtrending lactate as signs that perfusion is improving.
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Shock FAQ
What are the types of shock and how do I tell them apart?
Shock has four categories: hypovolemic, cardiogenic, distributive, and obstructive. Hypovolemic comes from blood or fluid loss (tachycardia, cool clammy skin, flat neck veins). Cardiogenic is pump failure with pulmonary congestion (crackles, JVD). Distributive is massive vasodilation with three subtypes: septic (warm and flushed early, fever, rising lactate), anaphylactic (airway swelling, wheezing, hives after an allergen), and neurogenic (the odd one out: bradycardia with warm, dry skin). Obstructive comes from a mechanical block to the heart, such as cardiac tamponade, tension pneumothorax, or massive pulmonary embolism, and is treated by relieving the obstruction. A quick differentiator: neurogenic is warm, dry, and slow, while the cold shocks (hypovolemic and cardiogenic) are cool, clammy, and fast.
Which type of shock causes bradycardia instead of tachycardia?
Neurogenic shock. It results from loss of sympathetic tone after a high spinal cord injury, leaving unopposed parasympathetic (vagal) activity. Without sympathetic drive the heart is not stimulated to speed up, so the client is bradycardic and hypotensive with warm, dry skin. This is the opposite of the cold shocks (hypovolemic and cardiogenic), where an intact sympathetic system produces tachycardia and cool, clammy skin. On the NCLEX, a spinal-injured client who is hypotensive with a slow pulse and warm, dry skin is your neurogenic shock answer.
What is the first action in anaphylactic shock?
Give intramuscular epinephrine into the vastus lateralis (anterolateral thigh) first, every time. Epinephrine is the only drug that reverses the underlying problem: it vasoconstricts to raise blood pressure and reduce airway swelling and bronchodilates to open the airway. After epinephrine, secure the airway, apply high-flow oxygen, and give IV fluids for hypotension. Antihistamines like diphenhydramine and corticosteroids are adjuncts only; they are slow and do nothing for the acute airway or blood pressure crisis, so they never come before epinephrine.
What is the order of the sepsis bundle interventions?
Measure the serum lactate, draw blood cultures BEFORE antibiotics, give broad-spectrum antibiotics within 1 hour, infuse 30 mL/kg isotonic crystalloid for hypotension or a lactate of 4 or higher, and start norepinephrine as the first-line vasopressor if the MAP stays below 65 mm Hg after fluids. Two key rules: cultures always come before antibiotics so you do not sterilize the sample, and fluids come before vasopressors. Reassess perfusion and repeat the lactate, targeting a MAP of at least 65 mm Hg and urine output of at least 0.5 mL/kg/hr.