CET Endoscopic Equipment & Instrumentation 3

Question 1

Which endoscopic accessory is used to retrieve polyps or foreign bodies from the GI tract?

Accepted Answer

Retrieval net/basket

Answer

Retrieval nets and baskets are designed to capture and remove polyps, stones, or foreign objects from the GI lumen.

Question 2

What is the primary function of an electrosurgical unit (ESU/generator) during endoscopic procedures?

Accepted Answer

Delivers electrical current for cutting and coagulation of tissue

Answer

The ESU delivers high-frequency electrical current through accessories like snares or probes to cut tissue or achieve hemostasis.

Question 3

During colonoscopy, carbon dioxide (CO2) insufflation is preferred over room air primarily because:

Accepted Answer

CO2 is absorbed more rapidly, reducing post-procedure discomfort

Answer

CO2 is absorbed across the bowel mucosa approximately 150 times faster than nitrogen in room air, significantly reducing post-procedure bloating and pain.

Question 4

What is the role of an overtube in endoscopic procedures?

Accepted Answer

Provides a conduit for the endoscope, stabilizes scope position, and prevents looping

Answer

An overtube is placed over the endoscope to straighten and stabilize it, prevent loop formation, and allow repeated scope passes.

Question 5

Which type of biopsy forceps is used to simultaneously obtain a tissue sample and coagulate the site?

Accepted Answer

Hot biopsy forceps

Answer

Hot biopsy forceps are connected to an electrosurgical unit and coagulate the tissue base while obtaining the biopsy specimen.

(CET) Certified Endoscopy Technician Practice Test

(CET) Certified Endoscopy Technician Practice Test

CET Endoscopic Equipment & Instrumentation 3