In hypovolemic shock, which combination of signs is most likely?

Prepare effectively for the Physician Assistant Clinical Knowledge Rating and Assessment Tool (PACKRAT) 1 Exam with comprehensive resources, flashcards, and detailed explanations. Ace your test with ease!

Multiple Choice

In hypovolemic shock, which combination of signs is most likely?

Explanation:
Hypovolemic shock occurs when there’s a significant loss of circulating blood volume, so venous return to the heart drops and preload falls. Central venous pressure reflects preload, so it decreases. With less volume returning, cardiac output falls and blood pressure drops. In response, the body activates the sympathetic system, raising heart rate to try to maintain perfusion, so the pulse rate increases. Therefore, the most likely signs are low central venous pressure, low blood pressure, and tachycardia. Increased CVP would indicate higher preload (not typical of hypovolemia), and increasing blood pressure with a slowed pulse would point away from hypovolemic shock and toward other conditions.

Hypovolemic shock occurs when there’s a significant loss of circulating blood volume, so venous return to the heart drops and preload falls. Central venous pressure reflects preload, so it decreases. With less volume returning, cardiac output falls and blood pressure drops. In response, the body activates the sympathetic system, raising heart rate to try to maintain perfusion, so the pulse rate increases.

Therefore, the most likely signs are low central venous pressure, low blood pressure, and tachycardia. Increased CVP would indicate higher preload (not typical of hypovolemia), and increasing blood pressure with a slowed pulse would point away from hypovolemic shock and toward other conditions.

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