A nurse is providing postoperative care for a client following a transurethral resection of the prostate to treat benign prostatic hypertrophy. Which of the following actions should the nurse take?

A) Evaluate the client's understanding of diabetes management: While it is important to assess the client’s understanding of diabetes management to prevent future hyperglycemic episodes, this is not the immediate priority. The client's current hyperglycemic-hyperosmolar state needs urgent intervention to stabilize their condition before educational measures can be effective.

B) Administer potassium supplements: Potassium supplementation may be necessary, especially if the client is hypokalemic, but it is not the first action. Electrolyte levels should be monitored and corrected as part of the treatment, but the initial priority is to address the severe dehydration and hyperglycemia.

C) Initiate a continuous infusion of 0.9% sodium chloride: This is the most critical first step. Clients in a hyperglycemic-hyperosmolar state are typically severely dehydrated due to osmotic diuresis. Initiating a continuous infusion of isotonic saline helps to restore intravascular volume, improve perfusion, and stabilize hemodynamics, which is essential before addressing other issues.

D) Check for improvements in the client's level of consciousness: Monitoring the client's level of consciousness is important as it provides information about their neurological status and response to treatment. However, this is a subsequent action after initiating fluid resuscitation, which directly addresses the immediate life-threatening aspects of the hyperglycemic-hyperosmolar state.

A) Lymphocytes 30%:
Lymphocyte levels are typically elevated during the acute phase of mononucleosis as the body fights the Epstein-Barr virus. A level of 30% indicates that the lymphocyte count is returning to a more normal range, which suggests the client is recovering from the infection.

B) RBC 4.4:
The red blood cell count is not directly indicative of recovery from mononucleosis. While it provides information about the client's overall hematologic status, it does not specifically reflect the status of the viral infection.

C) Hgb 14 g/dL:
Hemoglobin levels can provide information about the client's oxygen-carrying capacity but do not specifically indicate recovery from mononucleosis. Normal hemoglobin levels are reassuring but not directly related to the viral infection's resolution.

D) Hct 42%:
Hematocrit levels, like hemoglobin, offer information about the client's blood composition but do not directly indicate recovery from mononucleosis. While normal hematocrit levels are desirable, they are not specific to the recovery status of the viral illness.