A nurse is providing care for a client who has delirium in the intensive care unit. Which of the following interventions should the nurse implement first to prevent client injury?

A. Myocardial infarction: Enteral nutrition initiation within 24 to 48 hours is not directly associated with preventing myocardial infarction. While proper nutrition is important for overall cardiovascular health, the timing of enteral nutrition initiation primarily focuses on preventing complications related to increased intracranial pressure (ICP).

B. Bacterial translocation: Initiating enteral nutrition within 24 to 48 hours in clients with increased intracranial pressure helps prevent complications such as bacterial translocation. Bacterial translocation refers to the passage of bacteria from the gastrointestinal tract into the bloodstream and systemic circulation. Delayed initiation of enteral nutrition can lead to intestinal mucosal breakdown and increased intestinal permeability, facilitating bacterial translocation. Early enteral nutrition helps maintain intestinal mucosal integrity, reduces gut bacterial overgrowth, and decreases the risk of bacterial translocation, thereby lowering the risk of infectious complications.

C. Pulmonary embolus: Initiating enteral nutrition within 24 to 48 hours is not directly associated with preventing pulmonary embolus. Pulmonary embolism is a complication characterized by the obstruction of pulmonary arteries by blood clots, typically originating from deep vein thrombosis. Prevention of pulmonary embolus involves measures such as early mobilization, pharmacological prophylaxis, and mechanical compression devices to prevent venous stasis and thrombus formation.

D. Deep vein thrombosis: Initiating enteral nutrition within 24 to 48 hours is not directly associated with preventing deep vein thrombosis. Deep vein thrombosis is a complication characterized by the formation of blood clots within deep veins, commonly in the lower extremities. Prevention of deep vein thrombosis involves measures such as early mobilization, pharmacological prophylaxis, and mechanical compression devices to prevent venous stasis and thrombus formation.

A. The client develops bradycardia and bradypnea: Bradycardia (slow heart rate) and bradypnea (slow breathing rate) may indicate a slowing down of bodily functions but are not typical manifestations of postoperative shock. In postoperative shock, the body's compensatory mechanisms often lead to tachycardia (rapid heart rate) and tachypnea (rapid breathing rate) as the body tries to maintain perfusion.

B. The client has metabolic alkalosis and warm extremities: Metabolic alkalosis and warm extremities are not typically associated with postoperative shock. In shock, metabolic acidosis is more common due to tissue hypoperfusion, and extremities may become cool due to peripheral vasoconstriction as the body attempts to shunt blood to vital organs.

C. The client has hypertension and anuria: Hypertension (high blood pressure) and anuria (lack of urine output) are not indicative of postoperative shock. In shock, blood pressure typically decreases (hypotension), and oliguria or anuria may occur due to decreased renal perfusion.

D. The client has hypotension and is confused: This is the correct answer. Hypotension (low blood pressure) is a hallmark sign of shock, indicating inadequate tissue perfusion. Confusion may occur due to cerebral hypoperfusion and inadequate oxygen delivery to the brain. Confusion is a late sign of shock and indicates severe compromise of organ perfusion.