Certified Gastroenterology RN Endoscopic Procedures and Equipment Questions and Answers

Question 1

During the reprocessing of a flexible colonoscope, which of the following steps is MOST critical to perform immediately after pre-cleaning and before manual submersion cleaning?

Accepted Answer

Performing a pressure leak test.

Answer

Performing a pressure leak test is a critical safety step that must be done after pre-cleaning but before the endoscope is submerged for manual cleaning. [13] This test pressurizes the internal channels to detect any breaks or holes in the scope's sheath. [13] If a leak is present, submerging the scope would allow fluid to invade the internal components, leading to catastrophic and expensive damage. [13]

Question 2

A patient is undergoing an Endoscopic Retrograde Cholangiopancreatography (ERCP). The gastroenterology nurse knows that the MOST common complication associated with this procedure is:

Accepted Answer

Pancreatitis

Answer

Post-ERCP pancreatitis (PEP) is the most common complication of this procedure. [10, 15] It is believed to be caused by factors such as mechanical irritation of the pancreatic duct, pressure from contrast injection, or thermal injury during sphincterotomy. While cholangitis, hemorrhage, and perforation are also potential risks, pancreatitis occurs most frequently. [2, 14]

Question 3

During a colonoscopy with polypectomy using a monopolar snare, the nurse correctly places the dispersive electrode (grounding pad) on the patient. Which site represents the MOST appropriate placement?

Accepted Answer

On the patient's thigh, ensuring a large, well-vascularized muscle mass.

Answer

The dispersive electrode, or grounding pad, should be placed on a large, clean, dry, well-vascularized muscle mass close to the operative site, such as the thigh. [26, 32] This provides a safe, low-resistance path for the electrical current to exit the body. Placement over bony prominences, scar tissue, or near implanted electronic devices should be avoided as it can increase impedance and the risk of patient burns. [26, 32, 34]

Question 4

Argon Plasma Coagulation (APC) is a non-contact thermal modality used for hemostasis in the GI tract. What is the primary mechanism of action for APC?

Accepted Answer

It delivers a high-frequency electrical current to tissue via ionized argon gas.

Answer

APC works by directing a jet of argon gas toward the target tissue. A high-frequency electrical current then ionizes the gas, creating a plasma that conducts the current to the tissue without direct contact. [16, 25] This results in superficial coagulation and is effective for controlling bleeding from various lesions. [22, 25]

Question 5

A 50-year-old patient presents with chronic, occult iron deficiency anemia. An EGD and a full colonoscopy were both performed and revealed no source of bleeding. Which procedure should the nurse anticipate as the MOST appropriate next diagnostic step?

Accepted Answer

Video Capsule Endoscopy (VCE)

Answer

When upper and lower endoscopies are negative in a patient with suspected GI bleeding, the most likely source is the small bowel. Video Capsule Endoscopy (VCE) is the primary non-invasive procedure indicated to visualize the entire small bowel to identify the source of obscure GI bleeding. [1, 11, 12]

Certified Gastroenterology RN Practice Test

Certified Gastroenterology RN Practice Test

Certified Gastroenterology RN Endoscopic Procedures and Equipment Questions and Answers