A nurse in the emergency department is assessing a client who has internal injuries from a car crash. The client is disoriented to time and place, diaphoretic, and his lips are cyanotic. The nurse should anticipate which of the following findings as an indication of hypovolemic shock?

Choice A rationale Widening pulse pressure is not an indication of hypovolemic shock; instead, it is often associated with increased intracranial pressure or aortic regurgitation. In hypovolemic shock, the pulse pressure typically narrows as the systolic blood pressure drops and the diastolic pressure remains relatively stable or increases due to compensatory vasoconstriction. A narrowing pulse pressure reflects a decrease in stroke volume and is an earlier sign of circulatory collapse than a drop in the absolute systolic blood pressure reading. Choice B rationale Increased deep tendon reflexes are not a typical finding in hypovolemic shock. Reflex changes are more commonly associated with electrolyte imbalances, such as hypocalcemia or hypomagnesemia, or neurological disorders. In the state of shock, the body prioritizes perfusion to the brain and heart, leading to generalized weakness and decreased responsiveness. As the condition worsens and cellular hypoxia sets in, motor responses actually decrease rather than becoming hyperactive, eventually leading to flaccidity in the late stages of circulatory failure. Choice C rationale An increased heart rate, or tachycardia, is one of the earliest compensatory mechanisms for hypovolemic shock. As circulating blood volume decreases, the baroreceptors trigger the sympathetic nervous system to increase the heart rate to maintain cardiac output and tissue perfusion. A heart rate greater than 100 beats per minute in an adult is a classic sign that the body is attempting to compensate for blood or fluid loss, often occurring before a significant drop in blood pressure. Choice D rationale A pulse oximetry reading of 96 percent is within the normal range, which is typically 95 percent to 100 percent. In a client with cyanotic lips and internal injuries, this reading might be misleadingly high if there is poor peripheral perfusion or if the client is experiencing significant anemia from hemorrhage. While pulse oximetry measures oxygen saturation of hemoglobin, it does not reflect the total oxygen-carrying capacity or the adequacy of tissue perfusion, but 96 percent does not indicate shock.