The core problem is decreased circulating blood or fluid volume causing low cardiac output.
Before you read
Test yourself first: 5 questions
Question 1 of 5
A nurse is assessing a client with suspected hypovolemic shock. Which set of findings is most consistent with this diagnosis?
Answer: A. Hypovolemic shock produces hypotension, tachycardia, cool and clammy skin, decreased urine output, and a narrowed pulse pressure as the body compensates with vasoconstriction. Warm flushed skin with bounding pulses is characteristic of early distributive (septic) shock, not hypovolemic shock.
Question 2 of 5
Which finding distinguishes neurogenic shock from hypovolemic shock?
Answer: A. Neurogenic shock causes bradycardia because loss of sympathetic tone leaves unopposed vagal (parasympathetic) input to the heart. In hypovolemic shock the intact sympathetic response produces tachycardia. The presence of bradycardia with hypotension is the key distinguishing feature of neurogenic shock.
Question 3 of 5
A nurse is caring for a client who had a postpartum hemorrhage and now has an estimated blood loss of 1,500 mL. Which assessment finding is an early sign of hypovolemic shock the nurse should recognize?
Answer: A. Early hypovolemic shock is marked by tachycardia and a narrowing pulse pressure with cool, pale, clammy skin as compensatory mechanisms maintain perfusion. A falling blood pressure is a later sign because compensation initially preserves it. Bradycardia and bounding pulses are not features of shock; flushed warm skin reflects the opposite of compensation.
Question 4 of 5
Which set of findings best characterizes the skin assessment of a client in hypovolemic shock?
Answer: B. Hypovolemic shock triggers peripheral vasoconstriction that shunts blood to vital organs, producing cool, pale, clammy (diaphoretic) skin with delayed capillary refill. Warm, dry, flushed skin is more typical of the early warm phase of distributive (septic) shock.
Question 5 of 5
A client with severe burns is being resuscitated using a weight-based formula. The nurse understands that the primary goal of fluid resuscitation in the first 24 hours is to prevent which complication?
Answer: A. Major burns cause massive fluid shifts and plasma loss leading to hypovolemic (burn) shock. The primary goal of early fluid resuscitation is to maintain perfusion and prevent hypovolemic shock and acute kidney injury, monitored by urine output. Overhydration is avoided, but the central early risk is hypovolemia.
Keep the streak going with more questions like these, each with a full rationale.
What is hypovolemic shock?
Causes include hemorrhage, severe dehydration, burns, and major vomiting or diarrhea. The body first compensates with tachycardia and vasoconstriction, but if volume is not restored, blood pressure falls and the patient deteriorates rapidly.
Key points to remember
- The core problem is decreased circulating blood or fluid volume causing low cardiac output.
- Early compensated signs include tachycardia, restlessness, and cool pale skin with a normal or slightly low blood pressure.
- Late signs include hypotension, weak thready pulse, rapid shallow breathing, oliguria, and altered mental status.
- Causes include hemorrhage, trauma, burns, severe dehydration, and excessive vomiting or diarrhea.
- Hypotension is a late sign because compensatory mechanisms maintain pressure until volume loss is significant.
Common causes
- Hemorrhage, burns, dehydration
Signs & symptoms
- ↓ BP, ↑ HR, ↑ RR
- Cool pale clammy, weak pulse
- ↓ urine, thirst, ↓ LOC
Nursing priorities
- Ensure airway and breathing, then establish two large-bore IV lines for rapid fluid resuscitation.
- Administer isotonic crystalloids such as normal saline or lactated Ringer's and blood products as ordered.
- Control the source of bleeding or fluid loss by applying direct pressure or preparing for surgery.
- Position the patient flat with legs elevated if appropriate and keep the patient warm.
- Monitor vital signs, urine output hourly, level of consciousness, and response to fluids.
Labs & values
Patient teaching
- Drink adequate fluids during illness with vomiting or diarrhea and seek care for persistent fluid losses.
- Seek emergency care immediately for significant bleeding, trauma, or signs of dizziness and fainting.
Red flags: report now
- Falling blood pressure, declining urine output below 30 mL/hr, and worsening mental status signal decompensation requiring immediate action.
- Ongoing visible or suspected internal hemorrhage must be controlled and escalated immediately.
- Never delay fluid and blood resuscitation while waiting to identify the exact cause in active shock.
References
Clinical references for this topic
