title: Extracorporeal shock wave lithotripsy of pancreatic duct stones using the Healthtronics LithoTron lithotriptor and the Dornier HM3 lithotripsy machine.
abstract: OBJECTIVE
  Pancreatic duct stones, which are most often a result of alcohol induced chronic pancreatitis, can lead to chronic abdominal pain, pseudocysts, and exocrine and endocrine failure of the pancreas. Others have reported success using extracorporeal shock wave lithotripsy (ESWL) (Dornier Medical Systems, Inc., Marietta, Georgia) for pancreatic stones. We report our experience with pancreatic ESWL using the LithoTron (Healthtronics, Marietta, Georgia) and HM3 (Dornier) lithotripsy machines.
  
  
  METHODS
  We performed pancreatic ESWL in 23 patients in 4 years, including in 12 with the LithoTron and in 11 with the HM3. After ESWL endoscopic retrograde cholangio-pancreatography (ERCP) was performed in all cases. Stone-free status was defined as no stone fragments visualized or the elimination of all post-ESWL stones by ERCP.
  
  
  RESULTS
  Stone-free status was documented in 83% and 82% of patients treated with the LithoTron and HM3, respectively, and 2 per group later required open surgical intervention. There were no changes in pancreatic enzymes and no cases of sepsis or fever after ERCP.
  
  
  CONCLUSIONS
  In association with post-procedure ERCP pancreatic ESWL is an effective and safe procedure that enables patients with obstructing pancreatic duct stones recalcitrant to primary endoscopic extraction to avoid a potentially morbid open procedure. The HM3 and LithoTron have comparable efficacy and safety. This modality is particularly effective for a stone aggregate of less than 20 mm., while a larger stone burden of greater than 20 mm. in aggregate and multiple stones are clear risk factors for treatment failure.
authors.affiliation: Department of Urology, Northwestern University Medical School, Chicago, Illinois 60611-3008, USA.
authors.forename: Jonathan N
authors.initials: JN
authors.lastname: Rubenstein
authors.forename: Willis G
authors.initials: WG
authors.lastname: Parsons
authors.forename: Samuel C
authors.initials: SC
authors.lastname: Kim
authors.forename: Adam C
authors.initials: AC
authors.lastname: Weiser
authors.forename: Michele M
authors.initials: MM
authors.lastname: Loor
authors.forename: David S
authors.initials: DS
authors.lastname: Kube
authors.forename: Robert B
authors.initials: RB
authors.lastname: Nadler
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008096:Lithotripsy / Q000295:instrumentation; D008297:Male; D008875:Middle Aged; D010182:Pancreatic Diseases / Q000628:therapy*; D010183:Pancreatic Ducts; D016896:Treatment Outcome