The occlusion rate of pancreatic stents☆,☆☆,★,★★
Section snippets
MATERIALS AND METHODS
One hundred forty-six pancreatic ductal stents were removed from 115 patients and evaluated from July 1989 to June 1992 at the Indiana University Hospital. Indications for the use of these stents included chronic pancreatitis (n = 27), pancreas divisum (minor papilla) (n = 65), sphincter of Oddi dysfunction (n = 26), pancreatic sphincterotomy (n = 16), and protection of the pancreatic duct during precutting (n = 12). All stents were Amsterdam type, made of polyethylene, and manufactured by
RESULTS
When stents of all diameters were grouped together, the overall occlusion rate was 46% for an average intraductal time of 34 days. The data for 5F to 7F stents and for all stents combined are shown in Fig. 2.
. Percentage of occluded pancreatic stents of various sizes after various lengths of time. A, 5F to 7F stents. B, All stents combined.
DISCUSSION
Previous reports have found the rate of occlusion for pancreatic stents to range from 0% to 39% for an average intraductal time of 4 to 37 months (Table 1).1, 2, 3, 4, 5, 6 We have found that when a standardized method is used to detect patency, occlusion occurs much more rapidly than previously reported: 50% at 6 weeks and 100% at more than 9 weeks. A nearly linear progression in the occlusion rate occurred chronologically. Occlusion rates were similar for 5F and 7F stents. Not enough 10F or
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From the Indiana University Medical Center, Division of Gastroenterology/Hepatology, Indianapolis, Indiana.
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Reprint requests: Glen A. Lehman, MD, Indiana University Medical Center, 550 North University Boulevard, Suite 2300, Indianapolis, IN 46202.
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GASTROINTESTINAL ENDOSCOPY
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