AORN Electrosurgical Safety 1

Question 1

What is the primary mechanism by which a monopolar electrosurgical unit (ESU) cuts tissue?

Accepted Answer

Rapid cellular heating causes vaporization of intracellular fluid

Answer

In monopolar electrosurgery, high-frequency electrical current generates intense heat at the active electrode tip, rapidly vaporizing intracellular fluid and causing tissue cutting.

Question 2

Which electrosurgical waveform mode delivers a continuous, unmodulated current primarily used for cutting tissue?

Accepted Answer

Cut mode

Answer

Cut mode delivers a continuous, uninterrupted sinusoidal waveform that rapidly heats tissue cells to cause vaporization and cutting.

Question 3

What is the primary purpose of the dispersive (return) electrode in monopolar electrosurgery?

Accepted Answer

To provide a large surface area for safe return of current to the ESU

Answer

The dispersive electrode provides a large contact surface so that the return current is spread over a wide area, preventing dangerous heat concentration and burn injury.

Question 4

According to AORN guidelines, where is the most appropriate site for placing the dispersive electrode?

Accepted Answer

On a well-vascularized, large muscle mass closest to the operative site

Answer

AORN recommends placing the dispersive electrode on a large, well-vascularized muscle mass as close to the operative site as possible to optimize current return and minimize resistance.

Question 5

When a flammable alcohol-based antiseptic skin prep solution is used, what must the perioperative nurse ensure before electrosurgery is activated?

Accepted Answer

The solution has completely dried and pooling has been removed

Answer

Alcohol-based prep solutions are highly flammable, so AORN requires that the solution be allowed to fully dry and any pooling be eliminated before electrosurgery is used to prevent surgical fires.

(AORN) Association of PeriOperative Registered Nurses Practice Test

(AORN) Association of PeriOperative Registered Nurses Practice Test

AORN Electrosurgical Safety 1