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Related Concept Videos

Endoscopic Procedures V: ERCP01:26

Endoscopic Procedures V: ERCP

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Endoscopic Retrograde Cholangiopancreatography (ERCP) is a diagnostic procedure that combines endoscopy and fluoroscopy to diagnose and treat conditions related to the bile ducts, pancreatic ducts, and gallbladder. This procedure is beneficial for identifying and addressing blockages, gallstones, strictures, and tumors within the biliary or pancreatic systems. ERCP is both diagnostic and therapeutic, offering the ability to visualize and treat identified problems in one session.
Patient...
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Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy

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Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
Sigmoidoscopy
Sigmoidoscopy is a diagnostic procedure that uses a flexible sigmoidoscope equipped with a light source and camera to examine the rectum and sigmoid colon. The procedure involves inserting the tube through the anus...
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Endoscopic Procedures III: Video Capsule Endoscopy01:28

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Capsule endoscopy, or wireless or video capsule endoscopy, is a diagnostic procedure for examining the entire gastrointestinal tract. Patients swallow a capsule about the size of a vitamin tablet. The capsule is equipped with a transmitter, a battery, an LED light source, and a color video camera to capture images throughout the gastrointestinal tract. This procedure is particularly useful for diagnosing conditions such as Crohn's disease, ulcerative colitis, tumors, polyps, ulcers,...
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Endoscopic Studies I: Bronchoscopy and Thoracoscopy01:30

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Endoscopy is a non-surgical medical technique used to examine a person's internal organs and vessels. This lesson will focus on two types of endoscopic studies: bronchoscopy and thoracoscopy.
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Bronchoscopy is a procedure that involves direct visualization of the larynx, trachea, and bronchi for diagnostic and therapeutic purposes. A flexible fiber optic or rigid bronchoscope is used to carry out the procedure. The fiber-optic bronchoscope is more frequently used due...
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Endoscopic Procedures I: Esophagogastroduodenoscopy01:29

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An Esophagogastroduodenoscopy (EGD) is a diagnostic procedure in which an endoscopist uses a flexible, lighted endoscope to visualize the upper gastrointestinal (GI) tract. The procedure includes visualizing the oropharynx, esophagus, stomach, and the first part of the small intestine, the duodenum.
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Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

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The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:
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Related Experiment Video

Updated: Feb 27, 2026

Laparoscopic Cholecystectomy with Indocyanine Green Fluorescence: Choledochoscopic Stone Extraction and Primary Duct Suture
04:02

Laparoscopic Cholecystectomy with Indocyanine Green Fluorescence: Choledochoscopic Stone Extraction and Primary Duct Suture

Published on: November 25, 2025

464

Rigid or flexible choledochoscopy?

E Eleftheriadis, A Zissiadis, K Kotzampassi

    Endoscopy
    |November 1, 1985
    PubMed
    Summary

    For common bile duct exploration, the flexible Olympus choledochoscope offers better handling for beginners than the rigid Wolf scope. Both instruments yield good results in experienced hands.

    Area of Science:

    • Gastroenterology
    • Surgical Endoscopy

    Background:

    • Choledochoscopes are crucial for diagnosing and treating common bile duct diseases.
    • Selecting the appropriate choledochoscope impacts procedural efficiency and patient outcomes.

    Purpose of the Study:

    • To compare the handling and efficacy of the Wolf rigid choledochoscope and the Olympus flexible choledochoscope.
    • To evaluate the suitability of each scope for clinicians with varying experience levels.

    Main Methods:

    • A comparative analysis of 120 consecutive cases of common bile duct disease over a 4-year period.
    • Utilized the Wolf rigid scope in 30 cases and the Olympus flexible scope (CHF B3) in 88 cases; both were used in 2 cases.

    Main Results:

    • The Wolf rigid scope demonstrated poor ease of handling for inexperienced users.

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  • The Olympus flexible scope, while more expensive and delicate, offered significantly better maneuverability.
  • Both choledochoscopes achieved comparable outcomes when used by experienced endoscopists.

    • Conclusions:

    • The Olympus flexible choledochoscope is recommended for clinicians new to bile duct exploration due to its superior handling.
    • The Wolf rigid scope's low cost and durability do not outweigh its handling challenges for novice users.
    • Experienced practitioners can achieve successful outcomes with either choledochoscope type.