A nurse is assessing a client. Which of the following findings indicates a fluid volume deficit?

A. Deviation of the tongue from midline: Deviation of the tongue is associated with impairment of cranial nerve XII, the hypoglossal nerve. Damage to this nerve affects tongue movement rather than hearing or balance, so it is unrelated to vestibulocochlear nerve dysfunction.

B. Disequilibrium with movement: The vestibulocochlear nerve (cranial nerve VIII) is responsible for transmitting information related to hearing and balance. Impairment can lead to vertigo, unsteadiness, or difficulty maintaining equilibrium during movement. These symptoms reflect disruption in the vestibular portion of the nerve.

C. Inability to smell: Loss of smell is associated with cranial nerve I, the olfactory nerve. This nerve governs sensory input from the nasal mucosa and is unrelated to the auditory or balance functions of cranial nerve VIII.

D. Loss of peripheral vision: Loss of peripheral vision is linked to cranial nerve II, the optic nerve. Damage to this nerve affects visual fields, not balance or hearing, and therefore does not indicate vestibulocochlear nerve impairment.

A. Respiratory alkalosis: The client’s arterial pH is 7.30, indicating acidemia rather than alkalemia. Respiratory alkalosis is not expected in hyperglycemic crises; instead, metabolic acidosis may develop due to ketone accumulation and dehydration.

B. Hypotension: The client’s blood pressure is 96/65 mm Hg, which is lower than normal, likely related to dehydration from osmotic diuresis caused by severe hyperglycemia. Ongoing fluid loss increases the risk of hypotension, making it an important complication to monitor and manage promptly.

C. Septic shock: While the client has a recent history of bronchitis and pneumonia, there is no current evidence of infection such as fever, tachypnea, or elevated WBCs. Although infection could precipitate hyperglycemia, septic shock is not an immediate complication indicated by the current findings.

D. Cardiac arrhythmias: The client has a potassium level of 5.5 mEq/L, which is elevated. Hyperkalemia increases the risk of cardiac arrhythmias, especially in combination with dehydration and acidosis, making close cardiac monitoring necessary.

E. Renal failure: Elevated BUN (21 mg/dL) and creatinine (1.7 mg/dL) suggest impaired renal perfusion or acute kidney injury secondary to dehydration from osmotic diuresis. The client is at risk of progression to renal failure if fluid and electrolyte imbalances are not corrected.

F. Cerebral edema: Cerebral edema is often caused by an overly rapid drop in effective serum osmolarity during treatment, primarily when blood glucose is lowered too quickly. The rapid shift in fluid from the bloodstream to the brain cells can cause swelling.