Author Question: Harmonic scalpel is a common bipolar electrical energy handpiece used in the OR. What does the ... (Read 31 times)

sammy · **on:** Jul 18, 2018

Harmonic scalpel is a common bipolar electrical energy handpiece used in the OR. What does the working end accommodate?

a. Scissors only
b. Light beam
c. Blade tip or scissors
d. Laser

Question 2

Which is an advantage of using the argon beam coagulator?

a. Increased air embolism
b. Beam weight lighter than air
c. Patent return electrode not required
d. The argon beam spares surrounding tissue

k.lashomb · **Reply #1 on:** Jul 18, 2018

Answer to Question 1

ANS: C
The Harmonic scalpel is bipolar energy converted into mechanical vibrations. It does not function as an ESU. The instrument cuts and spot coagulates protein by ultrasonic vibration and minimal thermal effects. The tissue dissolves on contact. It can be used as a scissor tip or a blade tip.

Answer to Question 2

ANS: D
Argon lasers coagulate bleeding points or lesions. They destroy specific lesions and spare the surrounding tissue. Argon is heavier than air and creates less plume. Care is taken to avoid gas entering large open vessels because of the risk of gas embolism. Argon-enhanced electrosurgery is a form of monopolar ESU and requires the use of a patient return electrode.