Nursing the patient in shock: early signs, monitoring, fluid challenge and fluid overload, positioning, by type of shock
- Safe practice
In shock the nurse spots poor perfusion early, measures the response to each fluid challenge, watches for overload and adapts care to the type of shock.
What it is
Shock is a failure of the circulation to perfuse the tissues. Early on, the body compensates and the blood pressure may still be normal, so the nurse looks for the first signs: a rising heart rate, fast breathing, cold or mottled skin, slow capillary refill, new confusion, falling urine output and a rising lactate. In the ICU, care means close monitoring, oxygen and lines, helping with fluid challenges and measuring what each one changed, watching for fluid overload, and following the care that each type of shock needs. The diseases themselves are explained on the linked condition pages; recognising deterioration on the ward and sepsis have their own pages.
What it requires
- Continuous ECG, oxygen saturation and frequent blood pressure; an arterial line in established shock.
- Reliable venous access, and strict intake and output with hourly urine output when a catheter is in place.
- Goals written by the team (MAP, urine output, lactate) and a clear plan for fluids and vasoactive drugs.
- Early calls: shock is treated as an emergency, and the team is told as soon as it is suspected.
Components
- Hypovolaemic: loss of blood or fluid.
- Distributive: septic, anaphylactic and neurogenic shock, with vessels that dilate or leak.
- Cardiogenic: the heart cannot pump enough; congestion is a risk.
- Obstructive: a mechanical block to the circulation.
How it is applied (and why)
- Assess airway, breathing and circulation, give oxygen as ordered and call for help — shock is an emergency.
- Record heart rate, blood pressure, breathing, saturation, capillary refill, skin, mental status and urine output — they set the baseline for every change.
- Before a fluid challenge, record the same signs; give it over the time ordered — the challenge only means something if you compare before and after.
- Reassess after each challenge: pressure, heart rate, refill time, mottling, urine output and lactate — no improvement means stop and report.
- Listen to the lungs, check saturation, neck veins, oedema and weight — fluid that does not help can still harm.
- For passive leg raising, start semi-recumbent and tilt the whole bed; measure output, not only pressure — lifting legs by hand or causing pain spoils the test.
- Hypovolaemic (obvious blood or fluid loss): report and measure the losses you see — the team must find and stop the source.
- Cardiogenic: give fluid only as ordered, watch for crackles and breathlessness, prepare for arterial and central lines — the failing heart congests easily.
- Neurogenic: keep spinal precautions, expect low pressure with a slow pulse, report bradycardia — loss of sympathetic tone causes both.
- Anaphylaxis: stop the trigger, call, have epinephrine given first, lay the patient flat or sitting if breathless — then watch for a second reaction.
In nursing practice
- A shock index of 1 or more is a warning sign, but it can be falsely reassuring in older adults and in people on heart-rate-lowering medicines.
- Report rising lactate, falling urine output, new confusion or spreading mottling even when the blood pressure looks acceptable.
- After anaphylaxis, keep observing: about half of the second-phase (biphasic) reactions appear within 6 to 12 hours.
- In cardiogenic shock the team usually needs arterial and central lines and may use more advanced monitoring.
Common mistakes
- Waiting for low blood pressure before calling.
- Giving repeated fluid challenges without assessing the response to each one.
- Missing the first crackles or the fall in saturation during fluid resuscitation.
- Doing a passive leg raise by lifting the legs by hand while the patient is in pain or coughing.
- Treating a slow pulse with low pressure after spinal injury as if it were the usual hypovolaemic picture.
Test yourself
Think of the answer, then tap the question to see it.
Why can a patient in early shock have a normal blood pressure?
Compensation (faster heart rate and vasoconstriction) keeps the pressure up at first, so heart rate, skin, refill, mental status, urine and lactate change first.
What does the nurse do before and after a fluid challenge?
Records pressure, heart rate, capillary refill, mottling, urine output and lactate before, compares after, and checks lungs and saturation for overload.
How is a passive leg raise done correctly?
From a semi-recumbent position, by tilting the whole bed, measuring cardiac output rather than pressure alone, and avoiding pain or coughing during the test.
What pattern of vital signs suggests neurogenic shock?
Low blood pressure with a slow heart rate after a spinal cord injury, from loss of sympathetic tone.
What is the first drug in anaphylaxis, and why keep watching afterwards?
Epinephrine, given first; observation continues because a second (biphasic) reaction can appear hours later, often within 6 to 12 hours.
Elsewhere in DurgiPedia
Connections
Educational content for students; it does not replace your institution's protocols, supervised clinical training or a prescriber's order. Dose-calculation examples use made-up numbers: they are educational, not a clinical order.
Sources: Fluid administration for acute circulatory dysfunction using basic monitoring (Messina A, Collino F, Cecconi M, Ann Transl Med 2020;8(12):788) (Annals of Translational Medicine, open access in PubMed Central, 2020); Passive leg raising: five rules, not a drop of fluid! (Monnet X, Teboul JL, Crit Care 2015;19:18) (Critical Care, open access in PubMed Central, 2015); Nursing Fundamentals, 15.6 Applying the Nursing Process (fluids and electrolytes) (Open RN (Chippewa Valley Technical College), LibreTexts, 2021); World Allergy Organization anaphylaxis guidance 2020 (Cardona V et al., World Allergy Organ J 2020;13(10):100472) (World Allergy Organization Journal, open access in PubMed Central, 2020).
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Representative model, for educational purposes only.