SGNA Equipment and Technology 2

Question 1

Which device is used during colonoscopy to mechanically close a biopsy site or control small bleeding vessels?

Accepted Answer

Hemostatic clip (endoclip)

Answer

Hemostatic clips are metal clips deployed through the endoscope working channel to mechanically approximate tissue edges, close vessels, or mark biopsy sites.

Question 2

What is the advantage of narrow band imaging (NBI) during endoscopy?

Accepted Answer

Enhances visualization of mucosal vascular patterns and surface texture without dyes

Answer

NBI uses specific wavelengths of blue and green light that are highly absorbed by hemoglobin, highlighting mucosal vasculature and pit patterns for lesion characterization.

Question 3

Argon plasma coagulation (APC) achieves hemostasis by which mechanism?

Accepted Answer

Conducting ionized argon gas to deliver non-contact electrocoagulation to tissue

Answer

APC ionizes argon gas to create an electrical plasma that conducts current to tissue without direct contact, providing controlled coagulation for bleeding or ablation.

Question 4

Before using electrosurgical equipment during endoscopy, the nurse should verify:

Accepted Answer

Proper grounding pad placement and confirmed absence of implanted cardiac devices

Answer

Electrosurgical units require proper grounding pad placement to prevent burns, and implanted devices like pacemakers may require precautions or cardiology consultation.

Question 5

What is the function of the endoscope's deflection controls (up/down and left/right)?

Accepted Answer

Angulate the distal tip to navigate GI tract curves and improve visualization

Answer

The deflection dials angulate the endoscope's articulating distal tip in four directions, allowing the endoscopist to navigate curves, retroflex, and visualize all mucosal surfaces.

SGNA - Society of Gastroenterology Nurses and Associates Practice Test

SGNA - Society of Gastroenterology Nurses and Associates Practice Test

SGNA Equipment and Technology 2