A nurse is assessing a client's cranial nerves as part of a neurological examination. Which of the following actions should the nurse take to assess cranial nerve III?

The correct answer is a. Respiratory status.

Choice A: Respiratory Status

Reason: After the evacuation of a subdural hematoma, monitoring the respiratory status is crucial. This is because changes in respiratory patterns can indicate increased intracranial pressure (ICP) or brainstem compression, which are life-threatening conditions. Ensuring that the airway is clear and that the patient is breathing adequately is the top priority. Normal respiratory rate for adults is 12-20 breaths per minute.

Choice B: Temperature

Reason: While monitoring temperature is important to detect infections or other complications, it is not the immediate priority in the acute postoperative period following a subdural hematoma evacuation. Fever can indicate infection, but it is less likely to cause immediate life-threatening complications compared to respiratory issues.

Choice C: Intracranial Pressure

Reason: Monitoring intracranial pressure (ICP) is very important in patients with brain injuries. Normal ICP ranges from 5-15 mmHg. However, changes in respiratory status can be an early indicator of increased ICP. Therefore, while ICP monitoring is critical, ensuring the patient’s respiratory status is stable takes precedence.

Choice D: Serum Electrolytes

Reason: Serum electrolytes are important to monitor for overall metabolic stability and to detect imbalances that could affect neurological function. Normal ranges for key electrolytes are: Sodium (135-145 mEq/L), Potassium (3.5-4.5 mEq/L), and Chloride (80-100 mEq/L). However, these are not the immediate priority in the acute phase following surgery compared to respiratory status.

Choice A Reason: This choice is incorrect because hypomagnesemia is not a common finding in the oliguric phase of acute kidney injury. Hypomagnesemia is a condition in which the serum magnesium level is lower than normal (less than 1.5 mEq/L). It may be caused by various factors such as malnutrition, diarrhea, diuretics, or alcohol abuse. It may cause symptoms such as muscle weakness, tremors, tetany, or cardiac arrhythmias.

Choice B Reason: This choice is correct because hyperkalemia is a common finding in the oliguric phase of acute kidney injury. Hyperkalemia is a condition in which the serum potassium level is higher than normal (more than 5 mEq/L). It may be caused by reduced renal excretion of potassium due to decreased urine output (oliguria). It may cause symptoms such as muscle weakness, paresthesia, bradycardia, or cardiac arrest.

Choice C Reason: This choice is incorrect because decreased creatinine level is not a common finding in the oliguric phase of acute kidney injury. Creatinine is a waste product of muscle metabolism that is filtered by the kidneys and excreted in urine. A normal creatinine level ranges from 0.6 to 1.2 mg/dL for men and 0.5 to 1.1 mg/dL for women. In acute kidney injury, creatinine level usually increases due to reduced renal function and impaired clearance of creatinine.

Choice D Reason: This choice is incorrect because increased glomerular filtration rate (GFR) is not a common finding in the oliguric phase of acute kidney injury. GFR is a measure of how well

the kidneys filter blood and remove waste products.

A normal GFR range is 90,to 120 mL/min/1.73 m2. In acute kidney injury, GFR usually decreases due to reduced blood flow,to,the kidneys or damage to the glomeruli, which are the tiny blood vessels that filter blood in the kidneys.