A nurse is caring for a patient with a head injury who has developed diabetes insipidus and is receiving desmopressin. The nurse understands the therapeutic outcome is a decrease in:

Specific gravity.

Level of consciousness.

Urine output.

Blood pressure.

Answer and Explanation

The Correct Answer is C

Choice A reason:

A decrease in specific gravity is not the primary therapeutic outcome of desmopressin in the treatment of diabetes insipidus. Desmopressin works by increasing water reabsorption in the kidneys, which leads to a decrease in urine output and an increase in urine concentration, reflected by an increase, not a decrease, in specific gravity.

Choice B reason:

A decrease in the level of consciousness is not an intended therapeutic outcome and would be concerning if observed. Desmopressin aims to control symptoms of diabetes insipidus, not alter the patient’s mental status.

Choice C reason:

A decrease in urine output is the primary therapeutic outcome of desmopressin in a patient with diabetes insipidus. Desmopressin mimics the action of antidiuretic hormone (ADH), leading to increased water reabsorption in the kidneys and reduced urine volume.

Choice D reason:

Desmopressin does not primarily aim to decrease blood pressure. Its main effect is on water reabsorption in the kidneys, thereby reducing urine output. While it can have some impact on blood pressure, this is not its primary therapeutic outcome.

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Correct Answer is C

Explanation

Choice A reason:

Lower levels of arterial carbon dioxide do not directly facilitate brain oxygenation. While maintaining appropriate CO2 levels is important for overall respiratory function, the primary reason for targeting a specific PaCO2 range in traumatic brain injury is related to intracranial pressure control.

Choice B reason:

Although carbon dioxide is indeed a waste product that must be eliminated from the body, this statement does not explain why specific PaCO2 levels are targeted in the context of traumatic brain injury. The primary concern is the impact of CO2 on intracranial pressure.

Choice C reason:

Carbon dioxide is a potent vasodilator, and elevated levels can lead to increased intracranial pressure (ICP). By maintaining PaCO2 within a range of 35-38 mmHg, the healthcare provider aims to prevent hypercapnia and the resulting vasodilation, which can exacerbate intracranial hypertension in patients with traumatic brain injury.

Choice D reason:

Lower levels of arterial carbon dioxide are not specifically essential for gas exchange. The primary concern with PaCO2 management in traumatic brain injury is controlling intracranial pressure, rather than optimizing gas exchange alone.

A. Patient with a Glasgow Coma Scale score that was 9 and is now 12. B. Patient who is requesting pain medication for a new onset headache. C. Patient with a Glasgow Coma Scale score that was 10 and is now 8. D. Patient with a moderate brain injury who is amnesic for the event.

Correct Answer is C

Explanation

Choice A reason:

A Glasgow Coma Scale (GCS) score that improves from 9 to 12 indicates a positive trend in the patient's neurological status. While monitoring is still required, this patient is not the highest priority.

Choice B reason:

A patient requesting pain medication for a new onset headache needs attention, but this is not as urgent as a significant decline in the Glasgow Coma Scale score, which can indicate a deterioration in neurological function.

Choice C reason:

A Glasgow Coma Scale score that drops from 10 to 8 signifies a significant decline in the patient's neurological status, indicating potential worsening of the condition. This patient requires immediate assessment and intervention to identify and address the cause of the deterioration.

Choice D reason:

A patient with a moderate brain injury who is amnesic for the event needs ongoing monitoring, but this is not as urgent as addressing a significant drop in the Glasgow Coma Scale score.

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A nurse is caring for a patient with a head injury who has developed diabetes insipidus and is receiving desmopressin. The nurse understands the therapeutic outcome is a decrease in:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Why does the healthcare provider prescribe a ventilator setting to maintain partial pressure of arterial carbon dioxide (PaCO2) between 35 and 38 mmHg for a patient with traumatic brain injury?

Correct Answer is C

Explanation

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Correct Answer is C

Explanation

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