GI Endoscopy & Procedural Care 1 — Questions and Answers
Question 1: What is the primary purpose of a colonoscopy?
- To examine the esophagus and stomach
- To visualize the entire large intestine from rectum to cecum (Correct answer)
- To assess the small intestine for bleeding
- To evaluate bile duct obstruction
Correct answer: To visualize the entire large intestine from rectum to cecum
A colonoscopy uses a flexible scope to visualize the entire large intestine (colon) from the rectum to the cecum, allowing detection of polyps, cancer, and inflammatory conditions.
Question 2: Which patient position is typically used for the insertion phase of a colonoscopy?
- Supine with legs elevated
- Prone with head turned to the side
- Left lateral decubitus (Sims' position) (Correct answer)
- Fowler's position at 45 degrees
Correct answer: Left lateral decubitus (Sims' position)
The left lateral decubitus (Sims') position is standard for colonoscopy as it facilitates scope insertion through the rectum and navigation of the sigmoid colon.
Question 3: Which medication class is most commonly used for conscious sedation during upper endoscopy?
- Anticholinergics such as atropine
- Benzodiazepines such as midazolam (Correct answer)
- Beta-blockers such as metoprolol
- Antihistamines such as diphenhydramine
Correct answer: Benzodiazepines such as midazolam
Benzodiazepines such as midazolam are commonly used for conscious sedation during endoscopy to provide anxiolysis, amnesia, and mild sedation.
Question 4: Which complication is most specifically associated with ERCP compared to other endoscopic procedures?
- Aspiration pneumonia
- Post-procedural pancreatitis (Correct answer)
- Colonic perforation
- Esophageal stricture formation
Correct answer: Post-procedural pancreatitis
Post-ERCP pancreatitis is the most common and specific complication of ERCP, occurring due to manipulation and cannulation of the pancreatic duct.
Question 5: Per current fasting guidelines, how long should a patient be NPO before an elective upper endoscopy (EGD)?
- 2 hours for all food and liquids
- At least 6 hours for solids and 2 hours for clear liquids (Correct answer)
- 12 hours for all food and liquids
- No fasting required if only taking oral medications
Correct answer: At least 6 hours for solids and 2 hours for clear liquids
Per ASA guidelines, patients should fast at least 6 hours for solid food and 2 hours for clear liquids before elective upper endoscopy to reduce aspiration risk.
Question 6: Which parameters must be continuously monitored in a patient receiving conscious sedation during endoscopy?
- Blood glucose and urine output only
- Oxygen saturation, heart rate, blood pressure, and respiratory rate (Correct answer)
- Temperature and blood pressure only
- Oxygen saturation and pupillary response only
Correct answer: Oxygen saturation, heart rate, blood pressure, and respiratory rate
Complete cardiorespiratory monitoring including SpO2, heart rate, blood pressure, and respiratory rate is mandatory during conscious sedation to detect adverse events early.
Question 7: Which finding during colonoscopy requires immediate physician notification and potential emergency response?
- Multiple colonic diverticula without bleeding
- Signs of perforation with active hemorrhage (Correct answer)
- Diminutive polyps under 5mm in size
- Mild patchy mucosal erythema
Correct answer: Signs of perforation with active hemorrhage
Signs of perforation with active hemorrhage represent a life-threatening emergency requiring immediate physician notification and possible emergent surgical intervention.
GI Endoscopy & Procedural Care 1
What is the primary purpose of a colonoscopy?