A nurse is caring for a client in an induced coma for increased intracranial pressure (ICP). What should the nurse assess next to determine this client's cerebral function?
Glasgow Coma Scale
Pupillary size and reaction
Blood pressure and heart rate
Gag Reflex
The Correct Answer is B
A. The Glasgow Coma Scale is useful for assessing consciousness levels but may not be as sensitive for changes in brainstem function in a patient already in an induced coma.
B. Assessing pupillary size and reaction provides critical information on brainstem function and can indicate changes in ICP. Changes in pupil size and reaction can signify worsening cerebral function or brain herniation.
C. Blood pressure and heart rate are vital signs that can suggest increased ICP, but they are not as direct an indicator of cerebral function as pupil assessment.
D. The gag reflex is important but does not provide as direct information about cerebral function related to ICP as pupillary assessment does.
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Correct Answer is A
Explanation
A. The primary purpose of administering an osmotic diuretic, such as mannitol, is to lower ICP by promoting diuresis, which results in increased urinary output and decreases fluid volume in the brain.
B. Osmotic diuretics do not specifically reduce cerebral blood flow; rather, they work by reducing fluid volume and thus intracranial pressure.
C. While osmotic diuretics can help manage edema, their primary role is not solely to prevent the formation of cerebral edema but to actively reduce existing pressure.
D. Osmotic diuretics do not directly decrease brain oxygen consumption; their main function is to create an osmotic gradient that pulls fluid from the brain to reduce ICP.
Correct Answer is A
Explanation
A. Elevated PTH levels lead to increased calcium reabsorption from bones and enhanced calcium absorption in the kidneys, which can result in hypercalcemia and increase the risk of renal calculi (kidney stones).
B. Irritability and anxiety are not directly associated with high PTH levels. They are more often linked to thyroid hormone imbalances.
C. Frequent diarrhea is not a common symptom of elevated PTH levels; instead, hypercalcemia can lead to constipation.
D. Tetany and muscle pain are more commonly associated with low calcium levels, such as in hypoparathyroidism, not elevated PTH.