The charge nurse is teaching a group of telemetry nurses about cardioversion. Which statement by the telemetry nurse would indicate that they understand the instruction about the electrical discharge?

It occurs immediately when buttons depressed.

It requires a higher amount of joules than is used in defibrillation.

It discharges during ventricular depolarization of the heart.

It is programmed to occur in non-sync mode.

Answer and Explanation

The Correct Answer is C

A. It occurs immediately when buttons depressed: The device synchronizes with the R wave and does not deliver the shock immediately.

B. It requires a higher amount of joules than is used in defibrillation: Cardioversion typically requires fewer joules compared to defibrillation.

C. It discharges during ventricular depolarization of the heart: Synchronized cardioversion times the electrical shock with the R wave (ventricular depolarization) to avoid delivering energy during the T wave, which could induce ventricular fibrillation.

D. It is programmed to occur in non-sync mode: Cardioversion must be synchronized; non-sync mode is used in defibrillation.

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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. Hypokalemia B. Hypercalcemia C. Hyponatremia D. Hyperkalemia

Correct Answer is A

Explanation

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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The charge nurse is teaching a group of telemetry nurses about cardioversion. Which statement by the telemetry nurse would indicate that they understand the instruction about the electrical discharge?

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