A pancreas stent is a small tube placed inside the pancreatic duct to keep it open, drain fluid, or bypass a blockage. The procedure is performed during an endoscopy and serves a surprisingly wide range of purposes, from preventing inflammation after a related procedure to relieving pain caused by chronic disease or cancer. Most patients go home the same day or the next morning, and the stent itself is usually temporary, removed or exchanged weeks to months later depending on why it was placed. While the concept is straightforward, the details vary considerably based on whether the stent is prophylactic or therapeutic and what condition it is treating.
Why Pancreas Stents Are Placed
The pancreatic duct is a narrow channel that carries digestive enzymes from the pancreas to the small intestine. When that duct becomes blocked, narrowed, or damaged, enzymes can back up and cause severe pain, inflammation, or tissue destruction. A stent restores flow by holding the duct open, bridging a damaged section, or providing a route for fluid to drain out.
The list of conditions where pancreatic stents play a role is broad. They are used in chronic pancreatitis, pseudocysts, pancreas divisum, duct injuries and fistulas, complications from acute pancreatitis, recurrent idiopathic pancreatitis, and for preventing pancreatitis triggered by another endoscopic procedure called ERCP.1PubMed Central. Endoscopic pancreatic duct stent placement for inflammatory pancreatic diseases That is a lot of territory for one small tube, which is why the specifics of the stent, how long it stays in, and what the recovery looks like depend heavily on the reason it was placed.
Preventing Post-ERCP Pancreatitis
One of the most common reasons for pancreatic stenting has nothing to do with treating an existing pancreatic disease. ERCP (endoscopic retrograde cholangiopancreatography) is a procedure used to diagnose and treat problems in the bile ducts and pancreatic duct. A well-known risk of ERCP is that it can trigger acute pancreatitis afterward, a complication called post-ERCP pancreatitis, or PEP. In high-risk patients, a small, thin stent is placed temporarily in the pancreatic duct during the ERCP to keep the duct open and let secretions drain freely, reducing the chance of inflammation.
The evidence behind this is robust. A meta-analysis pooling data from multiple randomized trials found that prophylactic stent placement cut the risk of PEP by about 60%, and the benefit held for both mild-to-moderate and severe cases.2PubMed. Prophylactic pancreatic stent placement and post-ERCP pancreatitis: an updated meta-analysis A separate meta-analysis found that roughly 4% of stented patients developed PEP compared with about 10% of those without a stent.3PubMed Central. Updated meta-analysis of pancreatic stent placement in preventing post-endoscopic retrograde cholangiopancreatography pancreatitis A multicenter randomized trial reported that for patients whose pancreatic duct was inadvertently accessed during their first ERCP, placing a prophylactic stent meant you would need to treat about eight patients to prevent one case of PEP.4PubMed Central. Pancreatic stenting to prevent post-ERCP pancreatitis: a randomized multicenter trial
Prophylactic stents are intentionally small and short, typically thin enough to allow easy passage and designed to fall out on their own within days to weeks. They are not meant to stay in long-term.5Frontiers in Gastroenterology. Stent placement in pancreatic disease, when, which and why? – a current perspective Interestingly, a secondary analysis of a large trial dataset found that variations in stent length, diameter, and guidewire size did not significantly change whether the stent prevented pancreatitis, suggesting that the act of keeping the duct open matters more than the exact stent specifications.6PubMed Central. Technical factors associated with the benefit of prophylactic pancreatic stent placement during high-risk ERCP: a secondary analysis of the SVI trial dataset
Treating Chronic Pancreatitis Pain
Chronic pancreatitis causes scarring and narrowing of the pancreatic duct over time. This leads to a buildup of pressure, stone formation, and persistent pain that can be debilitating. Stenting aims to decompress the duct by bypassing strictures and restoring drainage. The therapeutic stents used here are larger and stay in longer than prophylactic ones, often requiring scheduled exchanges every few months.
Pain relief is the primary goal, and the results are encouraging but not universal. In a five-year follow-up study of patients who received stents for chronic pancreatitis, all initially reported at least partial pain relief. Over half maintained that improvement through the full five years, and most of those patients were completely pain-free at the end of follow-up.7PubMed Central. Endoscopic stent therapy in patients with chronic pancreatitis: a 5-year follow-up study A study using a standardized stenting protocol found that about three-quarters of patients could stop pain medications when the stent was in place, and about half remained medication-free a year later. Those results tracked closely with whether the stricture resolved and the duct diameter shrank.8PubMed. Endoscopic stenting for pain relief in chronic pancreatitis: results of a standardized protocol Another study reported that patients rated their pain at roughly half the level it had been before stenting, and the vast majority considered their treatment successful.9PubMed. Role of pancreatic duct stenting in the treatment of chronic pancreatitis
Quality-of-life research reinforces these findings. A prospective study found that patients who received pancreatic stents showed significant improvement in global health scores and role functioning over the course of follow-up, with a meaningful reduction in abdominal pain compared with baseline.10PubMed Central. Assessing the Impact of Medication and Stenting on the Quality of Life of Patients With Chronic Pancreatitis: A Prospective Study A multicentre study found that patients who had undergone pancreatic duct stenting reported slightly better quality of life than a reference population of chronic pancreatitis patients who had not, though pain levels were comparable between the groups and opioid use was higher in the stented group.11PubMed Central. Quality of life after endoscopic procedures for chronic pancreatitis: A multicentre study The higher opioid use likely reflects the fact that patients selected for stenting tend to have more severe disease in the first place.
Stenting for Pancreatic Cancer Pain
Pancreatic tumors can compress or obstruct the pancreatic duct, causing a distinctive pattern of pain that worsens with eating and radiates to the back. When this “obstructive-type” pain is identified, a stent placed across the tumor’s stricture can bypass the blockage and relieve pressure. The stent does not treat the cancer itself, but it can substantially improve comfort.
A systematic review and meta-analysis of pancreatic duct stenting for pain in cancer patients found that about 93% experienced partial or complete pain improvement, with an average duration of relief lasting roughly three months.12Gastroenterology Report. Endoscopic pancreatic duct stenting for pain palliation in selected pancreatic cancer patients: a systematic review and meta-analysis An earlier series reported that three-quarters of patients had reduced pain after stenting, and half no longer needed pain medication at all.13The American Journal of Gastroenterology. Pancreatic duct stents for “obstructive type” pain in pancreatic malignancy The literature consistently suggests that about 60% of patients with malignant duct obstruction get complete pain relief and roughly a quarter get partial relief.14PubMed. Pancreatic stenting for malignant ductal obstruction
There is an important caveat. Stenting works for obstructive pain but does not seem to help patients whose cancer pain is chronic and unremitting, caused by nerve invasion rather than duct blockage.13The American Journal of Gastroenterology. Pancreatic duct stents for “obstructive type” pain in pancreatic malignancy The distinction matters because not all pancreatic cancer pain is the same, and a stent will not help everyone. Careful patient selection, looking for the hallmarks of obstructive pain like a dilated duct upstream from the tumor, is key to predicting who will benefit.
Sealing Duct Leaks and Fistulas
The pancreatic duct can be disrupted by trauma, surgery, or severe pancreatitis. When it leaks, digestive enzymes escape into the surrounding tissue, causing fluid collections, fistulas, or ongoing inflammation. Stenting across the site of disruption diverts flow back into the intestine and allows the leak to heal.
Success hinges on whether the stent can fully bridge the disruption site. A multicenter retrospective study found that overall clinical success of endoscopic drainage for pancreatic leaks and fistulas was about 79%, but when the stent bridged the leak completely, the success rate jumped to about 94% compared with roughly 71% when it did not. Bridging the leak was an independent predictor of success.15PubMed Central. Outcomes and predictors of success of endoscopic retrograde pancreatic drainage for pancreatic leaks and fistulas: a multicenter retrospective study Earlier studies reached the same conclusion: successful resolution of a duct disruption depends on the type of disruption and whether the stent can cross it.16PubMed. Predictors of outcome in pancreatic duct disruption managed by endoscopic transpapillary stent placement17PubMed. Pancreatic stent placement for duct disruption When bridging is not possible, placing the stent as close to the leak as practical still helps, though outcomes are less favorable.
Stent Types and Materials
Most pancreatic stents are made of plastic. They are inexpensive, widely available, and easy to remove or exchange. For prophylactic use, they are intentionally narrow. For therapeutic use in chronic pancreatitis or cancer, they are larger in diameter. Plastic stents do clog over time because bacteria in the gut form biofilms on their surfaces. One study found bacterial DNA on nearly all retrieved plastic stents, with common gut organisms like Pseudomonas and Staphylococcus species predominating.18PubMed. Quantification of major constituents of biofilms in occluded pancreatic stents This biofilm buildup is why plastic stents need periodic exchange.
Metal stents, particularly fully covered self-expanding metal stents, are used in some situations, especially for draining pseudocysts and walled-off necrosis. A comparative study found that metal stents achieved complete resolution of pseudocysts in about 98% of cases versus 89% for plastic stents at one year, with fewer procedural complications.19PubMed. Metal versus plastic for pancreatic pseudocyst drainage: clinical outcomes and success Metal stents cost more, however, which raises questions about value.
For draining walled-off pancreatic necrosis, cost-effectiveness analyses have produced conflicting results. One analysis found that specialized lumen-apposing metal stents were more effective but came at a significantly higher per-patient cost, about $20,000 versus $16,000 for plastic.20PubMed. Cost-effectiveness analysis comparing lumen-apposing metal stents with plastic stents in the management of pancreatic walled-off necrosis Another analysis of pseudocyst drainage found the opposite: plastic stents were cheaper and slightly more effective, making them the dominant strategy.21PubMed Central. Plastic stents are more cost-effective than lumen-apposing metal stents in management of pancreatic pseudocysts The discrepancy likely reflects differences in the types of fluid collections being drained, since pseudocysts and walled-off necrosis are distinct problems with different complexity levels.
A newer option is biodegradable stents, which dissolve on their own and eliminate the need for a removal procedure. A multicenter retrospective study found that biodegradable stents had a 98% technical success rate for prophylactic use, with a lower cost per patient by several hundred dollars compared with conventional plastic stents that require a follow-up visit for retrieval. Endoscopists rated them as easy to use as standard plastic stents.22PubMed Central. Cost‐Effectiveness and Efficacy of Biodegradable Pancreatic Stents for Preventing Post‐ERCP Pancreatitis: A Retrospective Multi‐Center Study If these stents prove out in larger trials, they could simplify the experience for patients who currently need a second procedure just to have a prophylactic stent pulled.
Complications and What to Watch For
Pancreatic stenting is generally safe, but it carries its own set of risks. The most discussed are stent migration, occlusion, and fracture.
Migration means the stent shifts from its intended position. It can migrate outward (falling into the intestine, which is usually harmless) or inward (deeper into the pancreatic duct, which is the real concern). One study examining over 600 stent placements found a proximal migration rate of about 12%, with higher rates in patients who had sphincterotomy or stents placed through the minor papilla. Of the migrated stents, about 83% were successfully retrieved endoscopically, though roughly 43% had also fractured during migration, complicating removal.23Surgical Laparoscopy, Endoscopy & Percutaneous Techniques. Incidence, Risk Factors, and Treatment of Proximally Migrated Pancreatic Stents Roughly 10% of proximally migrated stents ultimately require surgical retrieval because endoscopic methods fail.24PubMed Central. Endoscopic removal of proximally migrated pancreatic duct stents: a case series and literature review
A separate study found lower overall rates of stent migration (about 1.5%), dislocation (under 1%), and fracture (about 1%), with all migrated stents successfully retrieved.25PubMed Central. Risk factors for migration, fracture, and dislocation of pancreatic stents The wide range in reported migration rates across studies reflects differences in patient populations, indications, stent sizes, and how aggressively migration is looked for. Patients treated for chronic pancreatitis, who often have scarred and irregular ducts, tend to have higher migration rates than those receiving small prophylactic stents.
Occlusion from biofilm, as mentioned earlier, is essentially inevitable with plastic stents given enough time. This is managed by exchanging the stent on a scheduled basis. Infection (cholangitis) can occur but is uncommon when exchanges are kept on track. The most serious complications associated with stent retrieval itself include a small risk of triggering pancreatitis during the removal procedure and, rarely, perforation.23Surgical Laparoscopy, Endoscopy & Percutaneous Techniques. Incidence, Risk Factors, and Treatment of Proximally Migrated Pancreatic Stents
How the Procedure Works and What Recovery Looks Like
Pancreatic stents are placed during ERCP, which is done under sedation. A flexible endoscope is passed through the mouth, down the esophagus, through the stomach, and into the duodenum where the pancreatic duct empties. A thin wire is threaded into the duct under X-ray guidance, and the stent is slid over the wire into position. The whole procedure typically takes 30 to 90 minutes, though it can be shorter for straightforward prophylactic placements.
Recovery is usually quick. Most patients go home the same day. You might have a sore throat from the endoscope, some bloating from the air used during the procedure, and mild abdominal discomfort for a day or two. Eating is typically resumed within hours. More significant post-procedure pancreatitis is the main risk to watch for: worsening abdominal pain, nausea, or fever in the hours or days after the procedure warrants a call to your doctor.
Stent removal is usually a simpler procedure than placement. It can often be done with a standard endoscope rather than the side-viewing scope used for ERCP. The endoscopist grasps the stent with forceps or a snare and pulls it out.26PubMed Central. Acute Pancreatitis after Biliary and Pancreatic Stent Removal with a Forward-Viewing Endoscope Rarely, a stent that has migrated or fractured requires creative retrieval techniques, including balloon catheters, baskets, or even specialized drill-tip devices designed to grip a broken stent from the inside.27VideoGIE. Pancreatic stent removal with a novel drill dilator
When Surgery Might Be Better
Endoscopic stenting is less invasive than surgery, but that does not always make it the better choice, especially for chronic pancreatitis with duct obstruction. Two landmark randomized trials have compared endoscopic treatment with surgical drainage, and both favored surgery for long-term pain control.
The first trial found that surgical drainage produced significantly lower pain scores than endoscopic treatment over two years. Complete or partial pain relief was achieved in 75% of surgical patients versus 32% of those treated endoscopically, and the endoscopy group needed far more procedures, a median of eight compared with three for surgery.28PubMed. Endoscopic versus surgical drainage of the pancreatic duct in chronic pancreatitis A more recent trial (the ESCAPE trial) with long-term follow-up confirmed these findings: early surgery led to lower pain scores, higher rates of complete pain relief (45% versus 20%), and much greater patient satisfaction (71% “very satisfied” versus 33%) compared with starting with endoscopy.29PubMed. Long-Term Outcomes of Early Surgery vs Endoscopy First in Chronic Pancreatitis: Follow-Up Analysis of the ESCAPE Randomized Clinical Trial
These results do not mean endoscopic stenting is useless for chronic pancreatitis. Many patients respond well to stenting and avoid surgery entirely. The data suggest, however, that when duct obstruction is the primary problem and surgery is a reasonable option, earlier surgical referral leads to better outcomes for more patients. Endoscopic stenting still plays a clear role as a first step, a bridge, or the preferred option for patients who are poor surgical candidates.
Pancreatic Stenting in Children
Pancreatic stenting is not just an adult procedure. Children with chronic or recurrent acute pancreatitis, particularly those with hereditary forms of the disease or anatomic anomalies of the pancreatic duct, can benefit from duct stenting. A study of 72 children who underwent a total of 223 stenting procedures found a dramatic reduction in pancreatitis episodes, from about 1.75 per year before treatment to 0.23 per year afterward. The median child needed three stent replacements. Stenting was performed most often in children with hereditary pancreatitis and those with structural duct anomalies.30PubMed. Efficiency of pancreatic duct stenting therapy in children with chronic pancreatitis
A smaller pediatric study reported complete pain relief in all nine patients who received stents for refractory abdominal pain from recurrent or chronic pancreatitis. Complications were mild and occurred in about 16% of procedures.31PubMed. Effectiveness of pancreatic stent placement in pediatric patients with acute recurrent and chronic pancreatitis These are small numbers, but they illustrate that the technique can be adapted for younger patients with significant disease, and that the general principles of stenting carry over from adult practice.
The Repeat-Procedure Reality
One thing that surprises some patients is how often pancreatic stents need to be exchanged or adjusted. Unlike a stent in a coronary artery that is placed once and left permanently, plastic pancreatic stents are inherently temporary. They clog, they can shift, and the underlying disease may progress or change. For chronic pancreatitis patients, scheduled exchanges every few months are the norm, sometimes over a period of one to two years before the stent can be removed for good. A systematic review noted that pancreatic duct decompression through stenting and stone removal improves quality of life in the short term, but the long-term picture depends on the underlying disease trajectory and whether the duct changes remain favorable after the stent comes out.32PubMed Central. Effect of pancreatic endotherapy on quality of life in chronic pancreatitis patients: A systematic review
For prophylactic stents, the picture is much simpler. Those tiny stents typically pass on their own or are removed at a brief follow-up visit. The biodegradable stents discussed earlier could eventually eliminate even that step. But for anyone receiving a therapeutic stent for an ongoing condition, understanding that this is not a one-and-done procedure is important for setting realistic expectations. The endoscopist is managing a chronic problem with a tool that requires maintenance, and the number of procedures can add up.