Quick answer: The four types of shock are hypovolemic (blood or fluid loss), cardiogenic (pump failure), distributive (widespread vasodilation: septic, anaphylactic and neurogenic) and obstructive (a blockage such as tension pneumothorax, cardiac tamponade or massive pulmonary embolism). All reduce tissue perfusion. Most cause tachycardia; neurogenic shock is the exception, with bradycardia and warm, dry skin. Treatment targets the cause: volume, pump support, vasoconstriction or removing the obstruction.
Every shock question describes the same failure, cells starved of oxygen, and asks you to work out why from the vital signs, skin and history. Place the client in the right category and the priority action usually follows. This guide also covers sepsis care under the 2026 Surviving Sepsis Campaign guideline.
What are the four types of shock?
Shock is inadequate tissue perfusion. Cells get too little oxygen, switch to anaerobic metabolism and produce lactic acid. Every cause fits one of four categories.
- Hypovolemic (the tank is low): hemorrhage, vomiting, diarrhea, burns, diabetes insipidus, third spacing.
- Cardiogenic (the pump fails): myocardial infarction, severe heart failure, dysrhythmias, acute valve failure such as papillary muscle rupture.
- Distributive (the pipes dilate): septic, anaphylactic and neurogenic shock. Volume may be normal, but the vascular space is too large for it.
- Obstructive (something blocks flow): tension pneumothorax, cardiac tamponade, massive pulmonary embolism.
Septic shock is the most common type in intensive care units; hemorrhagic (hypovolemic) shock is the most common type after trauma.
How do the types of shock compare on hemodynamics?
Learn this table by pattern. Systemic vascular resistance (SVR) shows whether vessels are clamped down or wide open; preload separates low volume from a failing pump.
| Type | Heart rate | Blood pressure | Cardiac output | SVR | Preload / CVP | Skin |
|---|---|---|---|---|---|---|
| Hypovolemic | Fast | Low (late sign) | Low | High | Low; flat neck veins | Cool, pale, clammy |
| Cardiogenic | Fast | Low | Low | High | High; JVD, crackles | Cool, pale, clammy |
| Obstructive | Fast | Low | Low | High | CVP high (JVD); left-heart filling low | Cool, pale, clammy |
| Septic (distributive) | Fast | Low | Normal or high early; low late | Low | Low or normal | Warm, flushed early; cool, mottled late |
| Anaphylactic (distributive) | Fast | Low | Low | Low | Low (capillary leak) | Flushed, hives, angioedema |
| Neurogenic (distributive) | Slow | Low | Low | Low | Low | Warm, dry below the injury |
A few contrasts answer most questions. Hypovolemic, cardiogenic and obstructive shock are “cold” shocks: SVR rises, so skin is cool and clammy. Distributive shocks have low SVR, which is why early septic and neurogenic shock feel warm.
The three cold shocks look alike until you check the neck veins and lungs: flat neck veins point to volume loss; JVD with crackles points to a failing pump; JVD with clear lung sounds usually points to an obstruction such as cardiac tamponade or massive pulmonary embolism (the exception is right ventricular infarction, a cardiogenic shock with the same picture that is treated with fluids, and nitrates are avoided), and JVD with reduced or absent breath sounds on one side points to tension pneumothorax. Neurogenic shock is the classic shock state that pairs hypotension with bradycardia; the others usually cause tachycardia unless a bradydysrhythmia, a beta-blocker or impending arrest slows the heart.
What are the stages of shock?
Shock moves through four stages. Hypotension is a late finding, not an early one.
- Initial: anaerobic metabolism begins and lactate rises. Signs are subtle: blood pressure normal or slightly high, mild agitation, slightly lower urine output.
- Compensatory: the sympathetic nervous system and renin-angiotensin-aldosterone system constrict vessels, speed the heart and retain fluid. Expect tachycardia, tachypnea, cool skin, falling urine output, restlessness and a narrowing pulse pressure as blood pressure starts to drop. This stage is still reversible.
- Progressive: compensation fails. Capillaries leak, metabolic acidosis develops, and the client has hypotension, weak pulses, crackles, a change in level of consciousness and urine output below 30 mL/hour.
- Refractory (irreversible): hypotension persists despite treatment, skin is mottled, urine output stops and organs fail. Recovery is unlikely.
What is the priority nursing action for each type of shock?
Start with airway, breathing and circulation: oxygen, IV access, monitoring and a call for help. Then treat the cause.
Hypovolemic shock: replace what was lost
First action: stop the loss and restore volume. Apply pressure to external bleeding, place two large-bore IVs and give isotonic crystalloid for fluid losses. For hemorrhage, give blood products early; massive transfusion uses red cells, plasma and platelets in a balanced ratio. Lay the client flat with the legs raised about 12 inches, not in Trendelenburg, which impairs breathing (see the positioning cheat sheet).
Cardiogenic shock: support the pump without flooding it
First action: improve oxygenation and cardiac output without overloading the lungs. Avoid large fluid boluses when crackles are present. Norepinephrine is the usual first vasopressor, dobutamine adds contractility, and when a myocardial infarction is the cause, emergency revascularization is the treatment linked to better survival. The NCLEX cardiac review covers ACS and heart failure.
Obstructive shock: remove the blockage
First action: prepare for the procedure that relieves the obstruction. Tension pneumothorax needs needle decompression, then a chest tube. Cardiac tamponade, flagged by Beck’s triad (hypotension, JVD, muffled heart sounds), needs pericardiocentesis. Massive pulmonary embolism needs thrombolysis or catheter-directed clot removal. Fluids only buy time; in massive pulmonary embolism they are given cautiously, because extra volume can overstretch the failing right ventricle.
Anaphylactic shock: epinephrine first
First action: stop the trigger and give IM epinephrine. The guideline dose is 0.01 mg/kg of 1 mg/mL (1:1,000) epinephrine into the mid-anterolateral thigh, maximum 0.5 mg per dose in adults and adolescents; FDA labeling caps children under 30 kg at 0.3 mg. Repeat every 5-15 minutes if symptoms persist (the label says 5-10). IV epinephrine is not used first because bolus doses can cause fatal dysrhythmias.
Position the client supine, or sitting if breathing is labored. Give high-flow oxygen and IV crystalloid for hypotension. Antihistamines, corticosteroids and albuterol are second-line; none reverses airway swelling or shock. Keep monitoring, because a biphasic reaction can return hours later.
Neurogenic shock: treat the low pressure and slow heart
First action: maintain spinal precautions while supporting blood pressure and heart rate. An injury at T6 or above cuts sympathetic outflow, so vessels dilate and the vagus nerve slows the heart unopposed: hypotension, bradycardia, warm dry skin and poikilothermia. Rule out hemorrhage first in any trauma client. Give fluid, then vasopressors, and keep atropine at the bedside; suctioning can trigger vagal bradycardia.
Exam teaching often cites a MAP goal of 85-90 mm Hg for 7 days after acute spinal cord injury. A 2024 guideline update instead suggests at least 75-80 mm Hg and no higher than 90-95 mm Hg, for 3-7 days. Follow the prescribed target; the NCLEX neuro review covers spinal cord injury.
How is septic shock managed under the 2026 Surviving Sepsis Campaign guideline?
Septic shock is sepsis with a vasopressor requirement to keep MAP at 65 mm Hg or higher plus a lactate above 2 mmol/L without hypovolemia. The Surviving Sepsis Campaign’s current adult guideline, published in 2026, replaced the 2021 edition. Nursing priorities:
- Screen early with NEWS, MEWS or SIRS rather than qSOFA alone.
- Cultures before antibiotics, without delaying them. Draw blood cultures as soon as possible, ideally before the first antimicrobial dose.
- Antibiotics immediately, ideally within 1 hour, for possible, probable or definite septic shock and for probable or definite sepsis without shock. For possible sepsis without shock, a short period of rapid investigation is allowed, with antimicrobials given within 3 hours if concern persists.
- Measure lactate, and repeat it to guide resuscitation when elevated.
- Crystalloid: at least 30 mL/kg in the first 3 hours for hypoperfusion or septic shock, with frequent reassessment for overload. Balanced crystalloids such as lactated Ringer’s are suggested over 0.9% saline; starches are not used.
- Norepinephrine first-line, adding vasopressin as doses climb. It may start through a peripheral IV rather than waiting for a central line; watch the site closely.
- MAP target of 65 mm Hg over higher targets; 60-65 mm Hg is suggested for adults 65 and older.
Test items often compress this into “cultures, antibiotics, fluids, then norepinephrine to a MAP of 65,” which still matches the guideline, though 30 mL/kg is a starting point to individualize. For more, see the NCLEX immune and infection review.
Sample NCLEX questions on types of shock
For a longer set, work through our shock NCLEX practice questions.
Sample question 1
A client arrives at 0215 after a diving accident with a suspected C5 spinal cord injury. Blood pressure is 80/46 mm Hg, heart rate 46/min, respiratory rate 16/min and temperature 97.2°F (36.2°C). The skin is warm and dry below the clavicles. The nurse recognizes these findings as most consistent with which condition?
- Hypovolemic shock from internal bleeding
- Autonomic dysreflexia from a distended bladder
- Neurogenic shock from lost sympathetic tone
- Cardiogenic shock from a myocardial contusion
Show answer & rationale
Correct answer: C. A cervical cord injury interrupts sympathetic outflow, so vessels dilate and the vagus nerve slows the heart unopposed; hypotension with bradycardia and warm, dry skin is the neurogenic pattern. A is wrong because hemorrhage causes tachycardia and cool, clammy skin. B is wrong because autonomic dysreflexia causes severe hypertension, not hypotension. D is wrong because cardiogenic shock from a contusion usually causes tachycardia and cool, clammy skin.
Sample question 2
A client with an anterior-wall myocardial infarction develops cardiogenic shock. Blood pressure is 84/56 mm Hg, heart rate 118/min and SpO2 90% on 4 L/min of oxygen, with crackles in both lung bases. Which prescription should the nurse clarify with the health care provider?
- Titrate a norepinephrine infusion to the target MAP
- Infuse 0.9% sodium chloride 2,000 mL over 1 hour
- Start a dobutamine infusion to improve contractility
- Prepare the client for emergency cardiac catheterization
Show answer & rationale
Correct answer: B. The problem is pump failure, and the crackles show the lungs are already congested; a 2-liter bolus would worsen pulmonary edema and hypoxemia. A is appropriate because norepinephrine is the preferred first vasopressor in cardiogenic shock. C is appropriate because dobutamine raises contractility and cardiac output. D is appropriate because emergency revascularization is linked to better survival when a myocardial infarction causes the shock.
Sample question 3
At 1410, a client receiving a first dose of IV cefazolin reports throat tightness. The nurse notes hives across the chest, audible wheezing and a blood pressure of 82/48 mm Hg. After stopping the infusion, which medication should the nurse administer first?
- Diphenhydramine intravenously
- Albuterol by nebulizer
- Methylprednisolone intravenously
- Epinephrine intramuscularly
Show answer & rationale
Correct answer: D. These findings indicate anaphylaxis, and IM epinephrine into the mid-anterolateral thigh (0.01 mg/kg, up to 0.5 mg in an adult) is first-line because it reverses vasodilation, airway edema and bronchospasm. A is wrong because an antihistamine eases hives but does not treat airway swelling or hypotension. B is wrong because albuterol treats bronchospasm only. C is wrong because corticosteroids take hours to act and are second-line.
Sample question 4 (Select all that apply)
The nurse is caring for a client with septic shock from a suspected abdominal source. The client weighs 70 kg, blood pressure is 78/40 mm Hg (MAP 53 mm Hg) and serum lactate is 4.8 mmol/L. Which prescriptions should the nurse anticipate? Select all that apply.
- A. Dopamine infusion as the first-line vasopressor
- B. Blood cultures before the first antibiotic
- C. Norepinephrine titrated to a MAP of 65 mm Hg
- D. Hydroxyethyl starch for volume replacement
- E. Lactated Ringer’s 2,100 mL within 3 hours
- F. An initial MAP goal of 85 mm Hg or higher
Show answer & rationale
Correct answers: B, C, E. Blood cultures are drawn ideally before antibiotics, without delaying the first dose (B). Norepinephrine is first-line, titrated to an initial MAP of 65 mm Hg (C). At least 30 mL/kg of crystalloid in 3 hours is 2,100 mL for 70 kg, and balanced crystalloids are preferred (E). A is wrong because norepinephrine is recommended over dopamine, which causes more dysrhythmias. D is wrong because starches are recommended against. F is wrong because 65 mm Hg is recommended over higher targets; 85-90 mm Hg comes from spinal cord injury teaching.
Frequently Asked Questions
What are the 4 types of shock?
Hypovolemic (loss of blood or fluid), cardiogenic (the heart fails as a pump), distributive (widespread vasodilation, including septic, anaphylactic and neurogenic shock) and obstructive (a blockage to flow, such as tension pneumothorax, cardiac tamponade or massive pulmonary embolism). All reduce oxygen delivery to tissues, but the cause decides the treatment.
Which type of shock causes bradycardia?
Neurogenic shock. A spinal cord injury at T6 or above cuts off sympathetic outflow, so the vagus nerve slows the heart unopposed. The client has hypotension, bradycardia and warm, dry skin. Other shock states usually cause tachycardia.
What is the first-line vasopressor for septic shock?
Norepinephrine. The 2026 Surviving Sepsis Campaign guideline recommends it first, with an initial mean arterial pressure target of 65 mm Hg (60-65 mm Hg suggested for adults 65 and older). Vasopressin is added when norepinephrine doses keep climbing.
What is the earliest sign of shock?
Early signs are subtle: restlessness or anxiety, rising heart and respiratory rates, a narrowing pulse pressure and a small drop in urine output, often while blood pressure is still normal. Hypotension is a late finding.
What is the difference between neurogenic shock and spinal shock?
Neurogenic shock is a circulation problem: loss of sympathetic tone causes hypotension, bradycardia and warm, dry skin. Spinal shock is a neurologic problem: temporary loss of movement, sensation and reflexes below the injury. Both can follow a spinal cord injury, but only neurogenic shock is circulatory shock.
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- Surviving Sepsis Campaign Adult Guidelines 2026 (SCCM recommendations page) — Cultures ideally before antibiotics, 1-hour antibiotics, >=30 mL/kg crystalloid, norepinephrine first, MAP 65
- The Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3), JAMA 2016 — Septic shock: vasopressors to keep MAP >=65 mm Hg plus lactate >2 mmol/L without hypovolemia
- Adrenalin (epinephrine injection) prescribing information, DailyMed — IM thigh dosing: max 0.5 mg if 30 kg or more; 0.01 mg/kg up to 0.3 mg if under 30 kg; repeat q5-10 min
- World Allergy Organization Anaphylaxis Guidance 2020 — IM epinephrine 0.01 mg/kg, max 0.5 mg, repeat q5-15 min; supine positioning; antihistamines second-line
- OpenStax Medical-Surgical Nursing, 23.1 Shock Overview — Four stages of shock (initial, compensatory, progressive, refractory) and vital-sign changes in each
- OpenStax Medical-Surgical Nursing, 23.4 Neurogenic Shock — Neurogenic shock: hypotension, bradycardia, warm skin, poikilothermia; atropine ready; MAP goal 85-90
- Kwon et al. Acute Spinal Cord Injury Guideline: Hemodynamic Management, Global Spine J 2024 — Updated SCI target: MAP at least 75-80 mm Hg, not above 90-95 mm Hg, for 3-7 days
- Uncomplicated circulatory shock: a narrative review, Einstein (Sao Paulo) 2024
- Guidelines for Essential Trauma Care, Second Edition, World Journal of Surgery 2026 — Hemorrhagic shock is the most common cause of shock in a trauma patient
Sources checked September 2026.