Here is the description of Nige's surgery:
http://www.top5plus5.com/Procedures_files/Surgical%20Therapy.html
The Puestow Procedure
The longitudinal pancreaticojejunostomy or Puestow's procedure is the prototypic drainage procedure for patients with marked dilation of the main pancreatic duct (greater than 7–8 mm). An 8–10-cm segment of the pancreatic duct is unroofed and intraductal concretions removed (Figure 22A). The jejunum is divided (Figure 22B) and the opened pancreatic duct is anastomosed to the jejunum (Figure 22C). This allows adequate drainage to enter the jejunum. A jejunojejunostomy reconnects the jejunum to restore continuity of the gastrointestinal tract (Figure 22D). This procedure is successful in relieving pain in 70–80% of patients in the short term. Pancreatic function remains good because there has not been resection of the gland. It is a safe and effective surgery with low morbidity and mortality.

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