Question
| A. | End viewing |
| B. |
Side viewing |
| C. |
Rigid |
| D. |
Front viewing |
|
Correct Answer � B Explanation |
 |
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Endoscopic Retrograde Cholangiopancreatography (ERCP) is a specialized procedure used to:
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Diagnose and treat biliary and pancreatic ductal diseases.
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Visualize and intervene in cases of choledocholithiasis, strictures, pancreatitis, and biliary leaks.
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Why a Side-viewing Endoscope is Used:
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Side-viewing duodenoscopes provide optimal visualization of the ampulla of Vater (major duodenal papilla) in the second part of the duodenum.
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The side-facing lens aligns the instrument channel and accessories (e.g., cannulas, sphincterotomes) directly toward the biliary and pancreatic ducts.
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This allows precise cannulation, sphincterotomy, stent placement, and stone extraction.
Why Other Options Are Incorrect:
A. End-viewing / Front-viewing (D)
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Standard gastroscopes are typically front-viewing.
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These do not allow effective alignment with the ampulla, making cannulation difficult or impossible.
C. Rigid
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Rigid endoscopes are used in ENT, urology, and some laparoscopic procedures, not in ERCP.
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ERCP requires a flexible side-viewing endoscope to navigate the upper GI tract and duodenum.