WallFlex Pancreatic Metal Stent for Pancreatic Duct Strictures

Inclusion Criteria: * Age 18 or older * Willing and able to comply with study procedures and follow-up schedule and provide written informed consent to participate in study * Chronic pancreatitis induced stricture of Cremer Type IV, namely distal dominant stricture with upstream ductal dilation. * For patients with one prior plastic pancreatic stent: VAS Pain Score and Frequency of Pain sectors of the Izbicki pain scale at the time of placement of the plastic stent. * Availability of narcotic dosage for at least one month prior to baseline visit for patients who do not have a prior plastic stent or availability for one month prior to placement of prior plastic stent, where applicable. * VAS Pain Score of ≥ 20 before study stent placement for patients without a prior plastic pancreatic stent. VAS Pain Score of ≥ 20 before initial plastic pancreatic stent placement for patients with a prior plastic pancreatic stent indwelling for 90 days or less before study stent placement. VAS Pain Score is captured via Izbicki pain scale. * Pain occurring weekly or more frequently (assessed by Frequency of Pain sector of the Izbicki pain scale) as reported before study stent placement for patients without a prior plastic pancreatic stent, or before placement of initial plastic pancreatic stent for patients with a prior plastic pancreatic stent indwelling for 90 days or less before study stent placement. * Minimum 5 mm diameter of dilated duct immediately upstream of pancreatic duct strictur…