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1. Question
A client in ventricular fibrillation is about to be defibrillated. A nurse knows that to convert this rhythm effectively, the machine should be set at which of the following energy levels (in joules, J) for the first delivery?
Correct
Answer & Rationale:
Option 3 is Correct
Rationale: The client may be defibrillated up to three times in succession. The energy levels used are 200, 300, and 360 J for the first, second, and third attempts, respectively.
Test-Taking Strategy: Focus on the strategic words first delivery. As a general rule, though, remember that lower levels of energy are used for cardioversion. Higher levels are used in defibrillation. Review this procedure if you had difficulty with this question.
Incorrect
Answer & Rationale:
Option 3 is Correct
Rationale: The client may be defibrillated up to three times in succession. The energy levels used are 200, 300, and 360 J for the first, second, and third attempts, respectively.
Test-Taking Strategy: Focus on the strategic words first delivery. As a general rule, though, remember that lower levels of energy are used for cardioversion. Higher levels are used in defibrillation. Review this procedure if you had difficulty with this question.
Ventricular fibrillation
Description
Impulses from many irritable foci in the ventricles fire in a totally disorganized manner.
VF is a chaotic rapid rhythm in which the ventricles quiver and there is no cardiac output.
VF is fatal if not successfully terminated within 3 to 5 minutes.
Client lacks a pulse, BP, respirations, and heart sounds.
Interventions
Defibrillate the client immediately, up to 3 times consecutively at 200, 300, and 360 joules (J).