The nurse is teaching a group of staff nurses about cardiac rhythms. The nurse would indicate that a U wave may indicate which of the following?

Hypokalemia

Hypercalcemia

Hyponatremia

Hyperkalemia

Answer and Explanation

The Correct Answer is A

A. Hypokalemia: U waves are often seen on an electrocardiogram in clients with hypokalemia. They represent delayed repolarization of the Purkinje fibers due to low potassium levels.

B. Hypercalcemia: Hypercalcemia affects the QT interval, typically shortening it, but it does not cause U waves.

C. Hyponatremia: Electrocardiographic changes are not commonly associated with hyponatremia.

D. Hyperkalemia: Hyperkalemia causes peaked T waves, prolonged PR intervals, and wide QRS complexes, not U waves.

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Correct Answer is ["D","E","F","G"]

Explanation

A. Morphine is typically used for pain relief, but it is not used to reduce cerebral edema.

B. Lactated Ringers is a balanced electrolyte solution, but it does not address the need for reducing cerebral edema.

D. Dexamethasone is a corticosteroid used to reduce inflammation and cerebral edema in cases of brain injury.

E. Mannitol is an osmotic diuretic used to reduce cerebral edema by drawing fluid out of the brain and into the bloodstream.

F. Hypertonic saline is used to increase serum osmolality, helping to pull water out of the brain and reduce edema.

G. Furosemide is a loop diuretic that can also help reduce cerebral edema by promoting diuresis.

A. BP 170/64 pulse 58 B. BP 180/90, pulse 96 C. BP 110/70, pulse 100 D. BP 100/60, pulse 54

Correct Answer is A

Explanation

A. BP 170/64, pulse 58: Cushing's triad includes increased systolic blood pressure with widened pulse pressure, bradycardia, and irregular respirations, indicating increased intracranial pressure.

B. BP 180/90, pulse 96: Hypertension is present, but the elevated pulse does not align with bradycardia seen in Cushing's triad.

C. BP 110/70, pulse 100: These values do not reflect the classic signs of Cushing's triad.

D. BP 100/60, pulse 54: While bradycardia is present, hypotension does not align with Cushing’s triad.

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The nurse is teaching a group of staff nurses about cardiac rhythms. The nurse would indicate that a U wave may indicate which of the following?

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Naxlex Comprehensive Predictor Exams

The nurse is caring for a client who was admitted 24 hours ago with a traumatic brain injury. Which medications would the nurse anticipate being prescribed to reduce cerebral edema and prevent a secondary brain injury? Select All That Apply

Correct Answer is ["D","E","F","G"]

Explanation

A client has been admitted with a head injury from a motor vehicle accident. Vital signs on admission were BP 120/80 mm Hg and pulse 88. Which vital signs would indicate that Cushing's triad was occurring?

Correct Answer is A

Explanation

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