A postoperative TURP client returns from the recovery room to the general surgery unit and is in stable condition. One hour later the nurse assesses him and finds him to be confused and disoriented. She recognizes that this is most likely caused by:

Early signs of hypovolemic shock include hypotension, tachycardia, tachypnea, pallor, and diaphoresis. Early signs of potassium depletion include muscular weakness or paralysis, tetany, postural hypotension, weak pulse, shallow respirations, apathy, weak voice, and electrocardiographic changes. Early signs of an elevated sodium level include dry oral mucous membranes, marked thirst, hypertension, tachycardia, oliguria or anuria, anxiety, and agitation. This answer is correct. Important early clinical findings of a decreased sodium concentration include confusion and disorientation. Hyponatremia can occur after a TURP because absorption during surgery through the prostate veins can increase circulating blood volume and decrease sodium concentration.