A nurse is planning to monitor a client for dehydration following several episodes of vomiting and an increase in the client's temperature. Which of the following findings should the nurse identify as an indication that the client is dehydrated?

Choice A rationale Hypertension is typically not a primary indicator of dehydration; rather, a decrease in blood pressure or orthostatic hypotension is expected. In dehydration, the intravascular volume decreases, which usually leads to a lower blood pressure as there is less fluid to exert force against arterial walls. A reading of 146/94 mm Hg suggests hypertension, which might be related to pain, stress, or a chronic condition, but it does not support a diagnosis of fluid volume deficit. Choice B rationale A bounding pulse is a clinical manifestation associated with fluid volume excess or fluid overload, not dehydration. When the body is dehydrated, the heart rate typically increases to compensate for low blood volume, but the pulse quality becomes weak, thready, or easily obliterated due to the lack of circulating fluid. A bounding pulse indicates that the circulatory system is filled to capacity or beyond, which contradicts the physiological state of a client who is losing fluids. Choice C rationale Distended neck veins are a classic sign of hypervolemia or right-sided heart failure. This physical finding occurs when the venous pressure is high, causing the jugular veins to bulge. In a dehydrated state, the neck veins are more likely to appear flat or collapsed, even when the client is in a supine position. Because dehydration involves a significant loss of total body water and vascular volume, the pressure required to distend these veins is absent. Choice D rationale Urine specific gravity measures the concentration of particles in the urine. The normal range is generally 1.005 to 1.030. A value of 1.034 indicates highly concentrated urine, which occurs when the kidneys attempt to conserve water in response to a systemic fluid deficit. As the body loses water through vomiting and increased metabolic demands from fever, the posterior pituitary releases antidiuretic hormone, prompting the kidneys to reabsorb water and excrete a smaller, more concentrated volume of urine.