Current situation of endoscopic biliary cannulation and salvage techniques for difficult cases: Current strategies in Japan

Development of a Scoring System for Predicting the Difficulty of Bile Duct Cannulation and Selecting the Appropriate Cannulation Method

BACKGROUND

Selective biliary cannulation in endoscopic retrograde cholangiopancreatography can be challenging due to factors like papillary morphology. Various patterns indicate cannulation difficulty, but the combinations causing difficulty and the optimal cannulation method for each scenario are unclear.

AIMS

This study aimed to identify cannulation difficulty patterns and develop a predictive scoring system for selecting the appropriate cannulation method.

METHODS

We retrospectively compared 776 patients with naïve papilla, dividing them into conventional contrast cannulation (N = 510) and salvage technique (N = 266) groups. The salvage group included patients using pancreatic duct guidewire placement and/or wire-guided cannulation due to difficulties with the contrast method. Papillary morphology (Haraldsson's classification), periampullary diverticulum (PAD), and scope operability were analyzed using multiple regression to identify risk factors for cannulation difficulties. Factors were scored based on hazard ratios to access combinations causing difficulties.

RESULTS

The salvage group had more older patients and higher frequencies of type 2 (small), type 3 (protruding or pendulous), type 4 (creased or ridged) papillae, PAD, and poor scope operability. Significant risk factors in the multivariate analysis included type 2 [odds ratio (OR) 6.88], type 3 (OR 7.74), type 4 (OR 4.06) papillae, PAD (OR 2.26), and poor scope operability (OR 4.03). Pattern recognition scores were significantly higher in the salvage group (1.31 vs. 3.43, P < 0.0001).

CONCLUSIONS

Type 2-4 papillae, PAD, and poor scope operability are significant risk factors for cannulation difficulty. Pattern recognition scores based on these factors can predict cannulation difficulty and aid in selecting between conventional and salvage methods.

Endoscopic Hemostatic Treatment with a Novel Self-Assembling Peptide Gel for Precut Fistulotomy-Related Bleeding

Introduction

Precut fistulotomy is of interest as one of the salvage techniques for selective bile duct cannulation using endoscopic retrograde cholangiopancreatography. Of the various endoscopic treatments reported to date for bleeding associated with papillotomy incision, endoscopic hemostasis treatment with a novel self-assembling peptide (SAP) matrix-forming gel (TDM-621) (3-D Matrix Ltd., Tokyo, Japan) remains only insufficiently reported in the literature.

Case Presentation

We herein report 6 cases of precut fistulotomy-related bleeding successfully treated with endoscopic hemostasis treatment with TDM-621, i.e., 5 and 1 cases during and after precut fistulotomy, respectively, in 2 males and 4 females aged 68-96 years (mean age, 85 years), 3 of whom had been on antithrombotic drugs. Types of bleeding treated included oozing bleeding (n = 5) and oozing bleeding from a visible vessel (n = 1). In all cases, complete hemostasis was achieved with TDM-621 without causing rebleeding.

Conclusion

Endoscopic hemostasis with TDM-621 may prove effective for precut fistulotomy-related bleeding and represent a potential modality of first choice in hemostasis. In addition, endoscopic hemostasis with combined modality therapy using TDM-621 and endoscopic hemoclips may prove effective for bleeding from visible vessels.

Frequent guidewire passage into the pancreatic duct is an independent risk factor for postendoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP) among high-risk individuals: A post-hoc analysis of a randomized controlled trial data

OBJECTIVES

To systematically evaluate the patient and procedural risk factors for post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP) among patients receiving rectal indomethacin.

METHODS

Data from a randomized controlled trial (RCT) of high-risk patients undergoing ERCP who received rectal indomethacin with or without topical epinephrine was evaluated. PEP was defined based on the consensus criteria. Pancreatic stenting was excluded to avoid confounding results with the role of epinephrine spray. Multivariable logistic regression analysis was used to identify patient and procedural risk factors for PEP.

RESULTS

Among 960 patients enrolled in the RCT, the PEP incidence was 6.4%. An increased risk of PEP was seen with age <50 years and female gender (odds ratio [OR] 2.40, 95% confidence interval [CI] 1.35-4.26), malignant biliary stricture(s) (OR 3.51, 95% CI 1.52-8.10), >2 guidewire passes into the pancreatic duct (PD) (OR 2.84, 95% CI 1.43-5.64), and pancreatic brush cytology (OR 6.37, 95% CI 1.10-36.90), whereas a decreased risk of PEP was seen with contrast- over guidewire-assisted cannulation (OR 0.14, 95% CI 0.02-0.99) and the use of lactated Ringer's (LR) over other fluid types (OR 0.52, 95% CI 0.27-0.98). There was a significant trend between the number of guidewire passes into the PD and PEP risk (P = 0.002).

CONCLUSIONS

More than two guidewire passes into the PD and pancreatic brush cytology increased while the use of LR decreased the risk of PEP among high-risk patients receiving rectal indomethacin. Pancreatic stent placement and/or LR should be considered in patients with >2 guidewire passes into the PD.

Prevention and Management of Complications of Biliary Endoscopy

Endoscopic retrograde cholangiopancreatography (ERCP) is an essential procedure for the management of pancreaticobiliary disorders. ERCP is, however, associated with the risk of complications including pancreatitis, bleeding, perforation, infection, and instrument failure, which can often be fatal. It is, therefore, necessary to recognize the risk of ERCP-associated complications and understand the methods to prevent and treat such complications.

Scissor-type knife precut in balloon enteroscopy-assisted ERCP for patients with difficult biliary cannulation and surgically altered anatomy (with video)

BACKGROUND AND AIMS

Balloon enteroscopy-assisted ERCP (BE-ERCP) is useful for treating pancreatobiliary disease in patients with surgically altered anatomy (SAA); however, biliary cannulation, including the precut technique, is often challenging. This study aimed to examine the feasibility of scissor-type knife precutting (SKP) during BE-ERCP in patients with SAA.

METHODS

This retrospective study investigated consecutive patients who underwent BE-ERCP and SKP for difficult biliary cannulation between 2016 and 2021. The study outcomes included the technical success and adverse event rates associated with SKP during BE-ERCP.

RESULTS

During the study period, 125 patients with native duodenal papillae underwent BE-ERCP, and the papilla was reached in 116 patients. The success rate of biliary cannulation with the standard cannulation approach alone was 67.2% (78/116), which increased to 77.6% (90/116) with the inclusion of advanced cannulation techniques besides precutting and further improved to 87.9% (102/116) with the addition of needlife precutting. SKP was attempted in 12 patients in whom all other cannulation approaches were difficult or resulted in failure. The technical success rate of SKP was 66.7% (8/12); thus, SKP increased the final success rate of biliary cannulation to 94.8% (110/116). The rate of adverse events associated with SKP was 8.3% (1/12).

CONCLUSIONS

This is the first study to report the use of the SKP technique for difficult biliary cannulation in patients with SAA, which may serve as a useful option for salvage cannulation during BE-ERCP.

A National Survey on the Environment and Basic Techniques of Endoscopic Retrograde Cholangiopancreatography in Korea

BACKGROUND/AIMS

The work environment in which endoscopic retrograde cholangiopancreatography (ERCP) is conducted has influence on its efficacy and safety. We aimed to assess the current status of ERCP work environments and to investigate the trends associated with the basic techniques of ERCP in Korea.

METHODS

The work environment and information on the basic techniques of ERCP were acquired by the Korean Pancreatobiliary Association (KPBA) through a national survey in 2019. The survey was performed at the KPBA conference in 2019. The contents of survey comprised of the current environment of ERCP, preparation before ERCP, and the preferred basic techniques used in ERCP.

RESULTS

Completed questionnaires were returned from 84 KPBA members. The mean ERCP volume per year was approximately 500. About 60% (50/84) reported that they worked with a dedicated ERCP team with experienced nurses. Two-thirds (57/84, 68%) answered that they had a fluoroscopy room used solely for ERCP procedures. All respondents intravenously hydrated the patient to prevent post-ERCP pancreatitis (84/84, 100%). The preferred procedural sedations were balanced propofol sedation (50%) and midazolam-only sedation (47%). Wire-guided cannulation was most commonly used for selective cannulation (81%). Endoscopic retrograde biliary drainage was preferred over endoscopic nasobiliary drainage (60% vs 22%). The initial method of ampullary intervention was endoscopic sphincterotomy in 60%.

CONCLUSIONS

Data from the survey involving a large number of Korean ERCP doctors revealed considerable variabilities with regard to the work environment and basic techniques of ERCP in Korea. The study provides information regarding the current trends of ERCP that can be used to establish ERCP standards in Korea.

Management of biliary diseases after the failure of initial needle knife precut sphincterotomy for biliary cannulation

Endoscopic retrograde cholangiopancreatography is not always successful even with needle knife precut sphincterotomy (NKPS). How to manage these patients with initial NKPS failure has not been well studied. We report the outcomes of patients who received endoscopic and non-endoscopic rescue treatment after the initial NKPS failure. During the 15 years from 2004 to 2018, 87 patients with initial NKPS failure received interval endoscopic treatment (IET group, n = 43), percutaneous transhepatic biliary drainage (PTBD group, n = 25), or bile duct surgery (BDS group, n = 19) were retrospectively studied. Compared with the PTBD group, the prevalence of choledocholithiasis was higher (69.8% vs. 16.0%, p < 0.001), and malignant bile duct stricture were lower (20.9% vs. 76.0%, p < 0.001) in the IET group. Furthermore, the IET group had a significantly longer time interval between the first and second treatment procedures (4 days vs. 2 days, p = 0.001), a lower technique success rate (79.1% vs. 100%, p = 0.021), and a shorter length of hospital stay (7 days vs. 18 days, p < 0.001). Compared to the BDS group, the only significant finding was that the patients in the IET group were older. Although not statistically significant, the complication rate was lowest in the IET group (7.0%) while highest in the BDS group (15.8%). Complications in the IET group were also mild, as compared with the other two groups. In conclusion, IET should be considered after initial failed NKPS for deep biliary cannulation before contemplating more invasive treatment such as BDS. PTBD may be the alternative therapy for patients with malignant biliary obstruction.

Biliary Cannulation in Patients with Roux-en-Y Gastrectomy: An Analysis of the Factors Associated with Successful Cannulation

Objective We investigated the results of biliary cannulation using a short-type single-balloon enteroscope in patients with a native papilla who had previously undergone Roux-en-Y gastrectomy and analyzed the factors associated with successful cannulation. Methods The study subjects consisted of patients with a native papilla who had previously undergone Roux-en-Y gastrectomy and endoscopic retrograde cholangiopancreatography using a short-type single-balloon enteroscope at our institution between September 2011 and July 2019. We carried out a retrospective investigation of the outcomes, including assessing the success rate of biliary cannulation, and analyzed the factors associated with successful cannulation. Results In total, 78 patients underwent biliary cannulation of a native papilla. The success rate of biliary cannulation was 80.8% (88.5% when including success on repeated attempts). The success rate of the standard cannulation technique was 60.3%, with the use of advanced cannulation techniques to secure the pancreatic duct providing the same additional effect as a normal anatomy. Adverse events occurred in 9.0% of cases. A multivariate analysis of the Roux-en-Y gastrectomy patients found that cannulation was more likely to be successful in patients in whom the scope could be placed in the retroflex position (odds ratio: 7.88, 95% confidence interval: 2.19-37.77, p<0.001). Conclusion Selective biliary cannulation using a short-type single-balloon enteroscope in patients with a native papilla who had undergone Roux-en-Y gastrectomy was effective and safe. The retroflex position provided a good papilla field of view and improved the success rate of biliary cannulation.

ERCP in Portugal: A Wide Survey on the Prevention of Post-ERCP Pancreatitis and Papillary Cannulation Techniques

Background/Aims

Recently the European Society of Gastrointestinal Endoscopy delivered guidelines on the prevention of post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP) and on the papillary cannulation and sphincterotomy techniques at endoscopic retrograde cholangiopancreatography (ERCP). There are no data concerning current practices in Portugal. The aim of this study was to capture practice patterns of Portuguese pancreaticobiliary endoscopists with special interest in the prevention of PEP and cannulation techniques.

Methods

A written survey was distributed to all pancreaticobiliary endoscopists attending the first Portuguese meeting dedicated to ERCP in November 2016. The main outcome measures were: technique used for standard biliary cannulation, use of nonsteroidal anti-inflammatory drugs (NSAIDs) in PEP, attempting prophylactic pancreatic stenting after using pancreatic guidewire (PGW)-assisted biliary cannulation in patients where biliary cannulation was difficult, and use of precut as the first rescue technique when biliary cannulation was difficult.

Results

Completed surveys were collected from 28 of the 32 pancreatobiliary endoscopists attending the meeting (answer rate 87.5%). Biliary cannulation was performed using a guidewire access technique by the majority (77%), usually with a sphincterotome. When cannulation was unsuccessful, precut was the first choice for 70%. NSAIDs were administered routinely for PEP by only 54%; PGW-assisted biliary cannulation was the first choice after failed standard cannulation for a minority of them, and only 27% reported to routinely attempt insertion of a pancreatic stent. High-volume endoscopists (> 150/year) tended to use NSAIDs and to insert a stent in PGW-assisted cannulation less often than low-volume-endoscopists (50 vs. 83.3%, p < 0.01, and 40 vs. 100%, p < 0.01, respectively). Precut was started without prior formal training by more than half of the endoscopists.

Conclusions

There is a pronounced discrepancy between evidence-based guidelines and current clinical practice. This discrepancy is more pronounced in PEP prophylaxis, especially among high-volume endoscopists. Some advanced techniques in ERCP are initiated unsupervised, without any previous formal training.

Key Message

There is a significant gap between guidelines and routine clinical practice.

Risk of pancreatitis after pancreatic duct guidewire placement during endoscopic retrograde cholangiopancreatography

BACKGROUND & AIMS

Advanced techniques have been developed to overcome difficult cannulation cases in endoscopic retrograde cholangiopancreatography (ERCP). Pancreatic duct guidewire placement method (PGW) is performed in difficult cannulation cases; it is possible that it places patients at risk of post-ERCP pancreatitis (PEP). The mechanism of PEP is still unclear, but pancreatic duct pressure and injury of pancreatic duct are known causes of PEP. Therefore, we hypothesized a relationship between pancreatic duct diameter and PEP and predicted that PGW would increase the risk of PEP in patients with non-dilated pancreatic ducts. This study aimed to investigate whether PGW increased the risk of PEP in patients with pancreatic duct diameter ≤ 3 mm.

METHODS

We analyzed 332 patients with pancreatic duct ≤ 3 mm who performed first time ERCP session. The primary endpoint was the rate of adverse event of PEP. We evaluated the risk of PEP in patients who had undergone PGW compared to those who had not, using the inverse probability of treatment weighting (IPTW) analysis.

RESULTS

PGW was found to be an independent risk factor for PEP by univariate analysis (odds ratio [OR], 2.45; 95% confidence interval [CI], 1.12-5.38; p = 0.03) after IPTW in patients with pancreatic duct diameter ≤ 3 mm. Adjusted for all covariates, PGW remained an independent risk factor for PEP (OR, 3.12; 95% CI, 1.33-7.33; p = 0.01).

CONCLUSION

Our results indicate that PGW in patients with pancreatic duct diameter ≤ 3 mm increases the risk of PEP.

Advances in management of difficult biliary access

Since the first report of endoscopic retrograde cholangio-pancreatography (ERCP) in 1986 for the diagnosis of biliary-pancreatic disease, ERCP has become an important means for the diagnosis and treatment of biliary-pancreatic disease. At present, although the success rate of endoscopic selective biliary cannulation is more than 90%, there are still 5%-10% of cases with failed cannulation, for which assistive technology is needed as a supplementary to achieve successful cannulation. Repeated attempts correlate with a higher success rate of cannulation, but also extend the operating time and increase the incidence of complications. In recent years, the concept of difficult biliary cannulation has been put forward and gradually accepted by endoscopic physicians. In the cases of difficult biliary cannulation, endoscopic physicians can adjust the cannulation strategy in time to improve the success rate and reduce the complication rate. This paper summarizes the literature published recently to make a systematic review of the advances in the management of difficult biliary cannulation.

Biliary Obstruction: Endoscopic Approaches

Painless jaundice is a harbinger of malignant biliary obstruction, with the majority of cases due to pancreatic adenocarcinoma. Despite advances in treatment, including improved surgical techniques and neoadjuvant (preoperative) chemotherapy, long-term survival from pancreatic cancer is rare. This lack of significant improvement in outcomes is believed to be due to multiple reasons, including the advanced stage at diagnosis and lack of an adequate biomarker for screening and early detection, prior to the onset of jaundice or epigastric pain. Close attention is required to select appropriate patients for preoperative biliary decompression, and to prevent morbid complications from biliary drainage procedures, such as pancreatitis and cholangitis. Use of small caliber plastic biliary stents during endoscopic retrograde cholangiopancreatography should be minimized, as metal stents have increased area for improved bile flow and a reduced risk of adverse events during neoadjuvant therapy. Efforts are underway by translational scientists, radiologists, oncologists, surgeons, and gastroenterologists to augment lifespan for our patients and to more readily treat this deadly disease. In this review, the authors discuss the rationale and techniques of endoscopic biliary intervention, mainly focusing on malignant biliary obstruction by pancreatic cancer.

Techniques for endoscopic retrograde cholangiopancreatography in altered gastrointestinal anatomy

PURPOSE OF REVIEW

This review highlights the current status of endoscopic retrograde cholangiopancreatography (ERCP) techniques in patients with altered anatomy. Endoscopic treatment of biliopancreatic disorders is particularly challenging in patients with altered anatomy.

RECENT FINDINGS

There are two main approaches to perform ERCP in patients with altered anatomy: the transluminal access and the transmural access. The transluminal access uses device-assisted enteroscopy (DAE) to reach and cannulate the biliopancreatic system. The transmural access is created using therapeutic endoscopic ultrasound (EUS) or surgery to reach the biliopancreatic system. Both techniques are under continuous development and optimization.

SUMMARY

Based on the currently available data in the literature, the transluminal access is the preferred first-line approach because of an acceptable success rate and an excellent safety profile, whereas the transmural approach may be more efficacious but with a higher complication rate, even in experienced hands. Due to the complexity of both techniques and the relative low number of procedures, patients with altered anatomy are best referred to high-volume centres where both techniques are available for optimal treatment.

Clip and endoloop lifting technique to assist cannulation of a hardly reachable papilla because of anatomical changes due to surgery

Bile duct cannulation by ERCP can be difficult because of different reasons. We present a patient with a hardly reachable papilla because of anatomical changes due to surgery. A clip, an endoloop and a guide wire were used to lift the papilla and pull it, achieving a successful cannulation.

The endoscopist's role in the diagnosis and management of pancreatic cancer

Pancreatic cancer remains one of the most lethal malignancies with little improvement in survival over the past several decades in spite of advances in imaging, risk factor identification, surgical technique and chemotherapy. This disappointing outcome is mainly due to failures to make an early diagnosis. In fact, the majority of the patients present with inoperable advanced stages of the disease. Though some of the new tumor markers are promising, we are still in search of the one that has a high sensitivity and accuracy, yet is inexpensive and easy to obtain. The paradigm of management has shifted from up-front surgery followed by adjuvant chemotherapy to neoadjuvant chemoradiation followed by surgery, especially for borderline resectable cancers and even for some resectable cancers. In this article, we will critically assess the limitations of tumor markers and review the advancements in endoscopic techniques in the management of pancreatic cancer.