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Laser Versus Mechanical Lithotripsy of Bile Duct Stones

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01759979
Recruitment Status : Completed
First Posted : January 3, 2013
Last Update Posted : March 31, 2017
Information provided by (Responsible Party):
James Buxbaum, University of Southern California

Brief Summary:

Very large bile duct stones are difficult to remove. The prefered method involves an endoscopic procedure known as endoscopic retrograde cholangiopancreatography (ERCP)performed using a special side viewing endoscope. In the past small baskets passed through the scope into the bile duct have been used to remove most stones using mechanical force.

Recently very small scopes known as cholangioscope have been introduced through the side viewing endoscope directly into the bile duct. These cholangioscopes may be used to guide laser therapy of bile duct stones. The investigators suspect that stone destruction using cholangioscopy guided laser stone destruction may enable bile duct stones to be removed more quickly and safely when added to the mechanical techniques.

Condition or disease Intervention/treatment Phase
Choledocholithiasis Procedure: Laser and mechanical lithotripsy Procedure: Mechanical Lithotripsy Not Applicable

  Show Detailed Description

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 60 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: Randomized Trial of Combination of Cholangioscopic Guided Laser Lithotripsy and Conventional Mechanical Versus Conventional Mechanical Methods for the Endoscopic Removal of Large Bile Duct Stones
Study Start Date : January 2013
Actual Primary Completion Date : March 2016
Actual Study Completion Date : March 2016

Arm Intervention/treatment
Experimental: Laser and mechanical lithotripsy
Bile duct stones with be treated with cholangioscopy guided laser therapy in addition to mechanical basket and balloon techniques.
Procedure: Laser and mechanical lithotripsy
Patients will undergo cholangioscopy guided laser treatment in addition to treatment with mechanical lithotripsy using basket and balloon techniques.
Other Names:
  • Spyglass cholangioscopy
  • Holmium laser lithotripsy

Active Comparator: Mechanical lithotripsy
Patients in the mechanical lithotripsy arm will undergo treatment only with basket and balloon for removal of large stones.
Procedure: Mechanical Lithotripsy
Patients in the mechanical lithotripsy arm will undergo treatment only with basket and balloons to facilitate stone removal but not laser lithotripsy.

Primary Outcome Measures :
  1. Bile Duct Stone Clearance [ Time Frame: 12 months ]
    Confirmation that no further stones remain in the bile duct of the patient by cholangiography. Additionally, serum laboratory abnormalities in AST, ALT, Alkaline Phophatase, or bilirubin, or epigastric abdominal pain attributable to bile duct stones.

Secondary Outcome Measures :
  1. Number of ERCP [ Time Frame: 12 months ]
    The number of ERCP procedures required from enrollment in study to complete clearance of bile duct stones.

  2. Total Procedure Time [ Time Frame: 12 months ]
    The total time in minutes for all the ERCP procedures required for stone rumoval.

  3. Estimated Procedure Cost [ Time Frame: 12 months ]
    The cost of patient management for bile duct stones based on the cost of the procedure, hospitalization, and associated costs of complications of cholangitis, pancreatitis, perforation, and bleeding.

  4. Cholangitis [ Time Frame: 12 months ]
    Cholangitis after or between ERCP procedures will be defined as a presentation with epigastric abdominal pain, temperature greater than 38.5 Celsius accompanied by either laboratory abnormalities of the AST, ALT, Alkaline Phosphatase, or Bilirubin or abnormal imaging of the biliary tree on ultrasound,computed tomography scan, or magnetic resonance cholangiopancreatography.

  5. Pancreatitis [ Time Frame: 12 months ]
    Pancreatitis following or between ERCP procedures will be defined as the onset of epigastric abdominal pain and either amylase or lipase greater than 3 times the upper limit of normal or findings on ultrasound, computed tomography scan, or magnetic resonance cholangiopancreatography suggestive of pancreatic inflammation.

  6. Bleeding [ Time Frame: 12 months ]
    Bleeding attributable to stone therapy will be defined as a drop in hemoglobin by more than 1 gm/dl following or between ERCP procedures with no other cause identified on standard clinical evaluation.

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Bile duct stone >1cm demonstrated on ultrasound, computed tomography, or magnetic resonance imaging
  • Bile duct dilatation >1cm

Exclusion Criteria:

  • Biliary, gallbladder or pancreatic malignancy
  • Pregnant
  • Prior biliary diversion surgery
  • Under age 18
  • Unable to give informed consent

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01759979

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United States, California
Los Angeles County Hospital
Los Angeles, California, United States, 90033
Sponsors and Collaborators
University of Southern California
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Principal Investigator: James L Buxbaum, MD University of Southern California

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Responsible Party: James Buxbaum, Director of Endoscopy, Los Angeles County Hospital, University of Southern California Identifier: NCT01759979     History of Changes
Other Study ID Numbers: HS-11-00718
First Posted: January 3, 2013    Key Record Dates
Last Update Posted: March 31, 2017
Last Verified: March 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Keywords provided by James Buxbaum, University of Southern California:
Cholelithiasis, Common Bile Duct
Additional relevant MeSH terms:
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Common Bile Duct Diseases
Bile Duct Diseases
Biliary Tract Diseases
Digestive System Diseases