Risk factors for ERCP-related complications: a prospective multicenter study

Pyogenic Liver Abscess and Delayed Massive Gastrointestinal Bleeding Following Endoscopic Retrograde Cholangiopancreatography (ERCP): Association of Two Rare Complications

A liver abscess (LA) is the most common type of visceral abscess. While biliary tract disorders are its most common etiology, clinicians should also consider less frequent causes such as iatrogenic complications due to certain interventions. One of these unusual causes is related to endoscopic retrograde cholangiopancreatography (ERCP) with endoscopic sphincterotomy (ES), a usually safe procedure that carries some risk of complications. We present the case of a 71-year-old female with a history of choledocholithiasis who underwent ERCP with ES without any immediate complications; she was discharged after 24 hours and readmitted three days later to the emergency room with fever and abdominal pain. An abdominal CT showed a liver abscess. Blood cultures were positive for Escherichia coli, Streptococcus anginosus, and Enterococcus faecalis, and the patient was started on directed antibiotic therapy with ampicillin, benzylpenicillin, and metronidazole. On day 17, due to hematochezia with hemodynamic instability, an urgent upper gastrointestinal endoscopy was performed, which revealed late post-ES bleeding, refractory to conventional endoscopic therapy. An ERCP was performed to control the bleeding by using a biliary fully covered self-expandable metal stent (FCSEMS), which was removed four weeks later. The follow-up CT showed a significant reduction of LA and the patient was discharged. This case highlights the association of two uncommon complications of ERCP: a LA and a major late post-ES bleeding. Clinicians should maintain a high index of suspicion for these complications in daily practice.

The Safety and Efficacy of an Unflanged 4F Pancreatic Stent in Transpancreatic Precut Sphincterotomy for Patients with Difficult Biliary Cannulation: A Prospective Cohort Study

Prophylactic pancreatic stenting effectively reduces the rate and severity of post-ERCP pancreatitis (PEP) in the precut technique; however, studies on the optimal type and duration of the stent are still lacking. This prospective study evaluated the incidence and severity of PEP and the rate of spontaneous stent dislodgement in patients undergoing transpancreatic precut sphincterotomy (TPS) accompanied by prophylactic pancreatic stenting with an unflanged plastic stent (4F × 5 cm) for difficult biliary cannulation. A total of 247 patients with naïve papilla were enrolled in this study, and data were collected prospectively. In the final analysis, 170 and 61 patients were included in the standard cannulation technique and TPS groups, respectively. The incidence of PEP in the standard cannulation technique and TPS groups was 3.5% and 1.6% (p = 0.679), respectively. The technical success rate of selective biliary cannulation in the TPS group was 91.8%. The spontaneous dislodgement rate of the prophylactic plastic stent was 98.4%. In conclusion, an unflanged pancreatic stent (4F × 5 cm) placement in TPS for patients with failed standard cannulation technique is a safe and effective measure due to low adverse events and few additional endoscopic procedures for removing the pancreatic duct (PD) stent.

Post-ERCP pancreatitis: Frequency and risk stratification from four tertiary care referral hospitals in South East Asia

Post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP) is a dreaded complication. But the frequency of this complication varies widely (1%-40%) among the literature and across geographical regions. With uncertainty in the estimation of occurrence and having no accepted, safe, effective method to prevent it, identification of its frequency and predictable risk factors is very crucial in a local or regional setting. The aim of this study was to identify the frequency of PEP and its risk factors from 4 tertiary care referral centers from a country in the South East Asia Region. This cross-sectional study was done on 1042 consecutive ERCP in adult patients (age >18 years) with baseline serum amylase levels less than 3 times the upper level of standard value. On the basis of clinical features and the amylase level at 24 hours (the next morning), the procedure was evaluated to confirm PEP. The frequency of PEP was calculated and procedure, patient, or operator-related independent risk factors for occurring PEP were analyzed using univariate and multivariate analyses. The study found 204 (19.6%) cases of PEP. In multivariate regression analysis, young age, suspected Sphincter of Oddi Dysfunction, recurrent pancreatitis, needle papillotomy, and pancreatic sphincterotomy were significant risk factors. The univariate analysis also found difficult cannulation and pancreatic duct injection with contrast as significant risk factors. Both patient-related and procedure-related risk factors acted independently for the development of PEP, which occurred in 19.6% of cases. This multicenter assessment of the frequency and risk factors for PEP in our patients would be extremely beneficial for future prevention of this complication.

The preventive effect of tacrolimus on patients with post-endoscopic retrograde cholangiopancreatography pancreatitis

Background/Aims

In patients undergoing endoscopic retrograde cholangiopancreatography (ERCP), calcineurin activates zymogen, which results in pancreatitis. In this study, we aimed to determine the efficacy of tacrolimus, a calcineurin inhibitor, in preventing post-ERCP pancreatitis (PEP).

Methods

This was a prospective pilot study in which patients who underwent ERCP received tacrolimus (4 mg in two divided doses); this was the Tac group. A contemporaneous cohort of patients was included as a control group. All patients were followed-up for PEP. PEP was characterized by worsening abdominal pain with an acute onset, elevated pancreatic enzymes, and a duration of hospital stay of more than 48 hours. Serum tacrolimus levels were measured immediately before the procedure in the Tac group.

Results

There were no differences in the baseline characteristics between the Tac group (n=48) and the control group (n=51). Only four out of 48 patients (8.3%) had PEP in the Tac group compared to eight out of 51 patients (15.7%) who had PEP in the control group. The mean trough tacrolimus level in patients who developed PEP was significantly lower (p<0.05).

Conclusions

Oral tacrolimus at a cumulative dose of 4 mg safely prevents PEP. Further randomized controlled studies are warranted to establish the role of tacrolimus in this context.

Basic and Advanced Biliary Cannulation: How Do I Do It?

Successful biliary cannulation of a native papilla is usually the rate-limiting step toward a successful ERCP. Standard cannulation techniques usually succeed, particularly when utilizing the wire-guided technique. There are, however, a myriad of confirmations of the major papilla as well as anatomic variants and certain pathologies which can make cannulation exceedingly difficult. For these cases, advanced cannulation techniques and techniques termed "access sphincterotomy" have been developed which should allow successful cannulation in >90% of cases. This article should help all those performing ERCP to improve their cannulation rate.

Difficult biliary cannulation in patients with distal malignant biliary obstruction: An underestimated problem?

BACKGROUND

Failed biliary cannulation still poses a major challenge in patients undergoing Endoscopic Retrograde Cholangiopancreatography (ERCP). To date, there is a lack of data on rates of Difficult Biliary Cannulation (DBC) in patients with distal malignant biliary obstruction (DMBO).

MATERIALS

This was a retrospective study (09/2015 to 02/2019) of consecutive patients with DMBO that underwent ERCP in four Italian centers. The primary outcome was to evaluate the rate of DBC. Secondary outcomes were: cannulation failure, rate of adverse events (AEs), the predictive factors for DBC as well as for AEs.

RESULTS

A total of 622 patients with DMBO, were included in the study, with 351(56,4%) matching the definition of DBC. One-hundred and two ERCP-related AEs occurred in 97 of 622 patients (15,6%). Subjects with DBC showed a higher risk for AEs (p = 0.02). The lack of pancreatitis prophylaxis (p = 0.03), diagnosis of cholangiocarcinoma (p = 0.02), the use of papillotomy (OR=1.98; 95%CI = 1.14-3.45) and the combination of two or more techniques for cannulation (OR = 2.88; 95%CI = 1.04-7.97) were associated with the occurrence of AEs.

CONCLUSIONS

According to the results of this study, patients with DMBO carries a higher rate of DBC thus requiring alternative techniques for biliary drainage. Furthermore, DBC carries a high risk for AEs. Further prospective multicentric studies are needed to confirm these data in this specific subgroup of patients.

Guidewire-assisted cannulation of the common bile duct for the prevention of post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis

BACKGROUND

Cannulation techniques have been recognized as being important in causing post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP). However, considerable controversy exists about the usefulness of the guidewire-assisted cannulation technique for the prevention of PEP.

OBJECTIVES

To assess the effectiveness and safety of the guidewire-assisted cannulation technique compared to the conventional contrast-assisted cannulation technique for the prevention of PEP in people undergoing diagnostic or therapeutic ERCP for biliary or pancreatic diseases.

SEARCH METHODS

For the previous version of this review, we searched CENTRAL (the Cochrane Library), MEDLINE, Embase, CINAHL and major conference proceedings, up to February 2012, with no language restrictions. An updated search was performed on 26 February 2021 for the current version of this review. Two clinical trial registries, clinicaltrials.gov and WHO ICTRP, were also searched in this update.

SELECTION CRITERIA

Randomized controlled trials (RCTs) comparing the guidewire-assisted cannulation technique versus the contrast-assisted cannulation technique in people undergoing ERCP.

DATA COLLECTION AND ANALYSIS

Two review authors conducted study selection, data extraction, and methodological quality assessment independently. Using intention-to-treat analysis with random-effects models, we combined dichotomous data to obtain risk ratios (RR) with 95% confidence intervals (CI). We assessed heterogeneity using the Chi² test (P < 0.10) and I² statistic (> 50%). To explore sources of heterogeneity, we conducted a priori subgroup analyses according to trial design, publication type, risk of bias, use of precut sphincterotomy, inadvertent guidewire insertion or contrast injection of the pancreatic duct (PD), use of a PD stent, cannulation device, and trainee involvement in cannulation. To assess the robustness of our results, we carried out sensitivity analyses using different summary statistics (RR versus odds ratio (OR)) and meta-analytic models (fixed-effect versus random-effects) and per-protocol analysis.

MAIN RESULTS

15 RCTs comprising 4426 participants were included. There was moderate heterogeneity among trials for the outcome of PEP (P = 0.08, I² = 36%). Meta-analyses suggest that the guidewire-assisted cannulation technique probably reduces the risk of PEP compared to the contrast-assisted cannulation technique (RR 0.51, 95% CI 0.36 to 0.72, 15 studies, moderate-certainty evidence). In addition, the guidewire-assisted cannulation technique may result in an increase in primary cannulation success (RR 1.06, 95% CI 1.01 to 1.12, 13 studies, low-certainty evidence), and probably reduces the need for precut sphincterotomy (RR 0.79, 95% CI 0.64 to 0.96, 10 studies, moderate-certainty evidence). Compared to the contrast-assisted cannulation technique, the guidewire-assisted cannulation technique may result in little to no difference in the risk of post-sphincterotomy bleeding (RR 0.87, 95% CI 0.49 to 1.54, 7 studies, low-certainty evidence) and perforation (RR 0.93, 95% CI 0.11 to 8.23, 8 studies, very low-certainty evidence). Procedure-related mortality was reported by eight studies, and there were no cases of deaths in both arms (moderate-certainty evidence). Subgroup analyses suggest that the heterogeneity for the outcome of PEP could be explained by differences in trial design. The results were robust in sensitivity analyses.

AUTHORS' CONCLUSIONS

There is moderate-certainty evidence that the guidewire-assisted cannulation technique probably reduces the risk of PEP compared to the contrast-assisted cannulation technique. There is low-certainty evidence that the guidewire-assisted cannulation technique may result in an increase in primary cannulation success. There is low- and very low-certainty evidence that the guidewire-assisted cannulation technique may result in little to no difference in the risk of bleeding and perforation. No procedure-related deaths were reported. Therefore, the guidewire-assisted cannulation technique appears to be superior to the contrast-assisted cannulation technique considering the certainty of evidence and the balance of benefits and harms. However, the routine use of guidewires in biliary cannulation will be dependent on local expertise, availability, and cost. Future research should assess the effectiveness and safety of the guidewire-assisted cannulation technique in the context of other pharmacologic or non-pharmacologic interventions for the prevention of PEP.

Increased post-endoscopic retrograde cholangiopancreatography pancreatitis for choledocholithiasis without acute cholangitis

BACKGROUND AND AIM

Choledocholithiasis is the most common indication for endoscopic retrograde cholangiopancreatography (ERCP). Identifying risk factors for post-ERCP pancreatitis (PEP) is important for reducing the risk of developing PEP after common bile duct (CBD) stone removal. However, studies examining the risk factors for PEP for CBD stones are scarce. The aim of this study was to examine whether the presence or absence of acute cholangitis is a clinical risk factor for PEP in patients with CBD stones.

METHODS

In this multicenter retrospective study, 1539 patients with naïve papillae were divided into patients without and with acute cholangitis. We compared the incidence of PEP between the two groups using one-to-one propensity score matching to adjust for the potential confounding factors of PEP.

RESULTS

In the entire cohort, the rates of PEP in patients without and with acute cholangitis were 9.6% (52/542) and 1.8% (18/997), respectively (P < 0.001, odds ratio = 5.8). In the propensity-matched cohort, the rates of PEP in patients without and with acute cholangitis were 8.3% (27/326) and 2.5% (8/326), respectively (P = 0.002, odds ratio = 3.6). The rate of PEP was significantly higher in patients without acute cholangitis than in those with acute cholangitis after adjusting for the confounding factors of PEP.

CONCLUSIONS

The absence of acute cholangitis may be an important clinical risk factor for PEP due to CBD stone removal. In patients without acute cholangitis, endoscopists should explain the specific risk of PEP carefully and actively implement prophylaxis against PEP.

Disease-Based Risk Stratification of Postendoscopic Retrograde Cholangiopancreatography Pancreatitis for Common Bile Duct Stones

BACKGROUND

Risk stratification of postendoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP) for common bile duct (CBD) stones is needed for clinicians to adequately explain to patients regarding the risk of PEP in advance of ERCP and to proactively take preventive measures in high-risk patients.

AIMS

To stratify the risk of PEP for CBD stones based on CBD-related diseases.

METHODS

A total of 1551 patients with naïve papilla who underwent ERCP for CBD stones were divided into three groups: Group A: asymptomatic CBD stones, Group B: obstructive jaundice and elevated liver test values without cholangitis, and Group C: mild, moderate, and severe cholangitis. We stratified the risk of PEP by comparing its incidence among the three groups using the Holm's method. Furthermore, we performed one-to-one propensity score matching between Group A and the other groups to examine the risk of PEP in Group A.

RESULTS

The incidence rates in Groups A, B, and C were 13.7%, 7.3%, and 1.8%, respectively. The Holm-adjusted p values between Groups A and B, Groups A and C, and Groups B and C were 0.023, < 0.001, and < 0.001, respectively. Propensity score matching revealed that the incidence of PEP was significantly more in Group A than in the other groups (13.3% vs. 1.5%; p < 0.001).

CONCLUSIONS

The risk of PEP for CBD stones was stratified into low risk (Group C), intermediate risk (Group B), and high risk (Group A). This simple disease-based risk stratification may be useful to predict the risk of PEP in advance of ERCP.

Emergency Endoscopic Retrograde Cholangiopancreatography Did Not Increase the Incidence of Postprocedural Pancreatitis Compared With Elective Cases: A Prospective Multicenter Observational Study

OBJECTIVE

The aim of this study was to identify the incidence of and risk factors for post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP) after emergency endoscopic retrograde cholangiopancreatography (ERCP).

METHODS

We performed a prospective multicenter observational study of 3914 patients who underwent ERCP. We compared the incidence of PEP after emergency and elective ERCP.

RESULTS

A total of 3410 patients were enrolled in this study. Post-ERCP pancreatitis occurred in 44 of 800 patients (5.5%) and in 190 of 2418 patients (7.9%) in the emergency and elective groups, respectively. No significant difference was noted between the groups (odds ratio [OR], 0.73; 95% confidence interval [CI], 0.52-1.03; P = 0.07). Multivariate analysis showed that the following factors increased the risk for PEP after emergency ERCP: contrast medium injection into the pancreatic duct (OR, 2.56; 95% CI, 1.30-5.03; P = 0.005), >4 cannulation attempts (OR, 5.72; 95% CI, 2.61-12.50; P < 0.001), and endoscopic papillary balloon dilatation (OR, 9.24; 95% CI, 2.13-40.10; P < 0.001).

CONCLUSIONS

No significant difference was noted in the incidence of PEP in patients after emergency and elective ERCP. We may prevent PEP even after emergency ERCP by avoiding contrast injection into the pancreatic duct, multiple cannulation attempts, and endoscopic papillary balloon dilatation.

Endoscopic retrograde cholangiopancreaticography-related complications – Experience from tertiary care teaching centre over half a decade

Introduction:

Endoscopic retrograde cholangiopancreaticography (ERCP) is an essential therapeutic procedure with a significant risk of complications. Data regarding the complications and predictors of adverse outcomes such as mortality are scarce, especially from India and Asia. We aimed to look at the incidence and outcome of complications in ERCP patients.

Materials and Methods:

This study is a retrospective analysis of prospectively collected data of all the patients who underwent ERCP and had a complication from January 2012 to December 2018. Data were recorded in predesigned pro forma. The data analysis was done by appropriate statistical tests.

RESULTS:

A total of 17,163 ERCP were done. A total of 570 patients (3.3%) had complications; perforation (n = 275, 1.6%) was most common followed by pancreatitis (n = 177, 1.03%) and bleeding (n = 60, 0.35%). The majorities of perforations were managed conservatively (n = 205, 74.5%), and 53 (19%) required surgery. Overall, 69 (0.4%) patients died. Of these, 30 (10.9%) patients died with perforation. Age (odds ratio [OR]: 1.04, 95% confidence interval [CI]: 1.005–1.07) and need of surgery (OR: 5.11, 95% CI: 1.66–15.77) were the predictors of mortality in patients with perforation. The majority pancreatitis were mild (n = 125, 70.6%) and overall mortality was 5.6% (n = 10).

Conclusion:

ERCP complications have been remained static over the years, with perforation and pancreatitis contributing the most. Most perforations can be managed conservatively with good clinical outcomes.

Comparative efficacy of different methods for difficult biliary cannulation in ERCP: systematic review and network meta-analysis

BACKGROUND AND AIMS

Several methods with variable efficacy have been proposed for difficult biliary cannulation in ERCP. We assessed the comparative efficacy of different strategies for difficult biliary cannulation through a network meta-analysis combining direct and indirect treatment comparisons.

METHODS

We identified 17 randomized controlled trials (2015 patients) that compared the efficacy of different adjunctive methods for difficult biliary cannulation (needle-knife techniques, pancreatic guidewire-assisted technique, pancreatic-assisted technique, and transpancreatic sphincterotomy) either with each other or with persistence with the standard cannulation techniques. The success rate of biliary cannulation and the incidence of post-ERCP pancreatitis (PEP) were the outcomes of interest. We performed pairwise and network meta-analysis for all treatments and used Grading of Recommendations Assessment, Development and Evaluation criteria to appraise quality of evidence.

RESULTS

Low-quality evidence supported the use of transpancreatic sphincterotomy over persistence with standard cannulation techniques (risk ratio [RR], 1.29; 95% confidence interval [CI], 1.05-1.59) and over any other adjunctive intervention (RR, 1.21 [95% CI, 1.01-1.44] vs pancreatic guidewire-assisted technique, RR, 1.19 [95% CI, 1.01-1.43] vs early needle-knife techniques, RR, 1.47 [95% CI, 1.03-2.10] vs pancreatic stent-assisted technique) for increasing the success rate of biliary cannulation. No other significant results were observed in any other comparisons. Based on the network model, transpancreatic sphincterotomy (P-score, .97) followed by early needle-knife techniques (P-score, .62) were ranked highest in terms of increasing the success rate of biliary cannulation. Early needle-knife techniques outperformed persistence with standard cannulation techniques in terms of decreasing PEP rate (RR, .61; 95% CI, .37-1.00), whereas both early needle-knife techniques and transpancreatic sphincterotomy led to lower PEP rates as compared with pancreatic guidewire-assisted technique (RR, .49 [95% CI, .23-.99] and .53 [95% CI, .30-.92], respectively).

CONCLUSIONS

Transpancreatic sphincterotomy increases the success rate of biliary cannulation as compared with persistence with the standard cannulation techniques. Early needle-knife techniques and transpancreatic sphincterotomy are superior to other interventions in decreasing PEP rates and should be considered in patients with difficult cannulation.

Endoscopic retrograde cholangiopancreatography-related complications for bile duct stones in asymptomatic and symptomatic patients

Background and Aim

Current guidelines recommend the removal of common bile duct (CBD) stones by endoscopic retrograde cholangiopancreatography (ERCP) for both asymptomatic and symptomatic patients. We conducted this study because of the limited research comparing the risks of ERCP-related complications between these two groups.

Methods

This retrospective study involved 1491 patients with native major duodenal papilla diagnosed with choledocholithiasis at three institutions in Japan. The rates of ERCP-related complications, including post-ERCP pancreatitis (PEP), cholangitis, bleeding, and perforation, were compared using one-to-one propensity score matching between the asymptomatic and symptomatic patients.

Results

Complications were observed in 112 (7.5%) of the 1491 patients (asymptomatic group: 31/172 [18.0%] vs symptomatic group: 81/1319 [6.1%], P < 0.001). The rate of severe complications was higher in the asymptomatic group than that in the symptomatic group (asymptomatic group: 5/31 [16.1%] vs symptomatic group: 3/81 [3.7%], P = 0.036). In the propensity-matched asymptomatic and symptomatic patients, the incidences of PEP, cholangitis, bleeding, and perforation were 18/143 (12.6%) vs 4/143 (2.8%) (P = 0.003); 4/107 (3.7%) vs 6/107 (5.6%) (P = 0.75); 1/140 (0.7%) vs 3/140 (2.1%) (P = 0.62); and 2/140 (1.4%) vs 2/140 (1.4%) (P = 1.0).

Conclusions

ERCP for asymptomatic patients with CBD stones is associated with a higher risk of overall and severe complications than that for symptomatic patients with CBD stones; the overall rate is influenced by the high incidence of PEP in the asymptomatic group. Endoscopists should explain the risk of ERCP-related complications for asymptomatic patients before performing the procedure.

Role of 4-H Serum Lipase Level in Predicting Postendoscopic retrograde Cholangiopancreatography Pancreatitis

Introduction:

Serum amylase level can rise asymptomatically after endoscopic retrograde cholangiopancreatography (ERCP). Thus, its assay can lead to overprediction of post-ERCP pancreatitis (PEP). Lipase assay is used to diagnose other forms of pancreatitis but usually not for PEP.

Objectives:

The aim of this study was to predict whether lipase may be of better use for the early prediction of PEP.

Methods:

One hundred and twenty-five consecutive ERCPs performed over a period of 1 year and 9 months were observed. On admission (baseline) and after ERCP at 4 and 24 h, serum amylase and lipase were measured. Based on sensitivity and specificity from the receiver operator characteristic (ROC) curve, optimal cutoff levels for the enzyme, serum lipase, and amylase levels were employed to predict PEP.

Results:

Out of 125 patients, 26 (20.8%) developed PEP. In multivariate analysis, young age, suspected sphincter of Oddi dysfunction, recurrent pancreatitis, and needle papillotomy were significant risk factors. Considering the optimum cutoff level (single value with the best sensitivity and specificity), both the enzyme amylase and lipase evaluated at 4 h were significant (Chi-square test: P =0.0001 for both the enzymes). However, multivariate regression analysis and levels of enzymes at different cutoff values in the ROC found that 4-h lipase levels were more (about 4 times) increased of the upper limit of normal range than amylase levels (1.19 times).

Conclusion:

The enzyme, serum amylase, and lipase evaluated at 4 h after ERCP were satisfactory predictors for PEP. However, when compared, serum lipase was more reliable than amylase.

Advances in gastrointestinal surgical endoscopy

Surgeons have a role in observing, detect abnormalities, disease, and other deficiencies in function which could be treated. Diagnosing and treating back days were challenging for many reasons. However, technology's innovation enhances surgeons' ability to treat their patients. The term endoscopy refers to the Greek prefix endo- ("within") and the verb skopein ("to view or observe"). Endoscopy is practical both in the diagnosis and treatment of various pathologies. Technological advances, especially in endoscopy, gradually progress and discover many possibilities which allow rapid advancement. Endoscopy development aims to assess human orifice that has not been inspected, probed, and examined over the centuries. Endoscopy over these decades is improving, which led to new problem solving using advanced technological approaches. Thus, a surgeon can solve any issues from examination, diagnosis, and treatment using progressive endoscopy evolution. This review delivers a brief history of advances in surgical endoscopy and describes current endoscopy development.

Factors Predicting Difficult Biliary Cannulation during Endoscopic Retrograde Cholangiopancreatography for Common Bile Duct Stones

Background/Aims

Difficult biliary cannulation is an important risk factor for post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP). Therefore, this study aimed to identify the factors that predict difficult cannulation for common bile duct stones (CBDS) to reduce the risk for PEP.

Methods

This multicenter retrospective study included 1,406 consecutive patients with native papillae who underwent ERCP for CBDS. Factors predicting difficult cannulation for CBDS were identified using univariate and multivariate analyses.

Results

Univariate analysis showed that six factors significantly predicted difficult cannulation: ERCP performed by non-expert endoscopists, low-volume center, absence of acute cholangitis, normal serum bilirubin, intradiverticular papilla, and type of major duodenal papilla. Multivariate analysis identified ERCP performed by non-expert endoscopists (odds ratio [OR], 2.5; p<0.001), low-volume center (OR, 1.6; p<0.001), intradiverticular papilla (OR, 1.3; p=0.007), normal serum bilirubin (OR, 1.3; p=0.038), and absence of acute cholangitis (OR, 1.3; p=0.049) as factors significantly predicting difficult cannulation for CBDS.

Conclusions

Initial cannulation by an experienced endoscopist, early rescue cannulation, or early takeover by an experienced endoscopist should be considered when performing ERCP for CBDS in the presence of factors predicting difficult cannulation.

Bilateral pneumothorax: The cause of hypoxia during endoscopic retrograde cholangiopancreatography

Background:

Endoscopic retrograde cholangiopancreatography (ERCP) is recognized as a significant diagnostic and therapeutic procedure for the administration of different pancreatic and biliary problems. This procedure runs a considerable risk of complications despite its substantial safety. The rate of significant inconveniences is reported to range from 5.4% to 23.0% and the general mortality from 0.1 to 1%. Post-ERCP pneumothorax is an uncommon complication that is usually underestimated

Case Presentation:

In the present study, we report a 65-year-old woman who develops hypoxemia during the ERCP. Based on the obtained results, it was revealed that this patient had perforation-related bilateral pneumothorax and hypoxemia.

Conclusion:

Based on the obtained results, it was revealed that this patient had perforation-related bilateral pneumothorax and hypoxemia.

Role of EUS at high risk for choledocholithiasis without severe cholangitis and visible stone on cross-sectional imaging: A multicenter randomized clinical trial

Background and Objectives:

The prevalence of choledocholithiasis in the high-risk group of choledocholithiasis has been reported to be slightly more than 50% when there is no definite cholangitis. Replacement of diagnostic endoscopic retrograde cholangiography (ERC) with an EUS-first approach may be beneficial in these patients.

Materials and Methods:

In this prospective, multicenter study, patients with dilated common bile duct and serum total bilirubin levels of 1.8–4 mg/dL were randomly allocated to undergo either EUS first, followed by subsequent ERC if necessary (EUS group) or ERC only (ERC group). The primary endpoint was the incidence of negative outcomes associated with a false-negative diagnosis of the choledocholithiasis or the endoscopic procedure. The secondary endpoints were the rate of diagnostic ERC and hospital stay length related to the endoscopic procedure.

Results:

Of 90 patients who were randomly assigned, the final analysis involved 42 in the EUS group and 44 in the ERC group. The negative outcomes were not significantly different between the EUS and ERC groups (2.4% vs. 6.8%; P = 0.62). The rate of diagnostic ERC was significantly lower in the EUS group (2.4% vs. 47.7%; P < 0.001). The hospital stay length related to the endoscopic procedure was significantly shorter in the EUS group (1.8 ± 1.0 vs. 2.5 ± 1.2 days; P = 0.001).

Conclusion:

In selected high-risk choledocholithiasis patients, an EUS-first strategy significantly decreased the rate of diagnostic ERC and hospital stay but did not achieve a significant reduction in negative endoscopic procedure outcomes.

The role of endoscopic ultrasound in evaluating patients with bile duct dilation of unclear etiology

OBJECTIVE

Bile duct dilation (BDD) of unclear etiology is a common indication for further imaging via endoscopic ultrasound (EUS). We aimed to assess the yield of EUS in determining BDD etiology in patients with prior non-diagnostic imaging studies.

METHODS

A retrospective chart review was performed at a single, tertiary-care university hospital for patients referred for EUS for BDD with or without pancreatic duct dilation (PDD). EUS-guided fine needle aspiration (FNA) was performed if a focal lesion was identified. Cases with an etiology of BDD diagnosed or strongly suggested by prior imaging were excluded. EUS findings believed to represent a structural cause for BDD included a wide range of pancreaticobiliary and luminal pathology as well as patients' clinical factors.

RESULTS

In total, 307 patients were identified. Findings to explain BDD were found by EUS in 213 patients for a diagnostic yield of 69.4%. Patients with jaundice were significantly more likely to receive a diagnosis by EUS than those without (78.8% vs 55.3%, P < 0.01). Notably, 8.1% of patients with normal liver function test (LFT) had a EUS-diagnosed malignancy. Patients' age, narcotic use, concurrent PDD and prior cholecystectomy did not appear to influence the EUS yield.

CONCLUSIONS

EUS continues to play a substantial role in evaluating BDD of unclear etiology, most notably in patients with jaundice. In addition, given that 8.1% of asymptomatic patients without jaundice or abnormal LFT had malignancy diagnosed on EUS, the use of EUS for BDD of unclear etiology remains warranted.

Is the Combination of Rectal Diclofenac and Intravenous Ringer Lactate Superior to Individual Therapy for Prophylaxis of Post-Endoscopic Retrograde Cholangiopancreatography Pancreatitis: A Prospective, Open-Label, Single-Center Randomized Trial

METHODS

This was single-center, open-label, randomized trial. Patients who were undergoing ERCP and who were at high risk for the development of PEP were selected for the study. Patients were randomized into 3 treatment groups: diclofenac suppository group, RL group, and a combination group.

RESULTS

Eight of 57 patients (14.03%) in the diclofenac group, 9 of 57 patients (15.78%) in the RL group, and 6 of 57 patients (10.52%) in the combination group developed PEP. The incidence of PEP between the three groups was not statistically significant (P = 0.70). Serum amylase level of >252 U/L had 91.3% sensitivity and 92.6% specificity for the diagnosis of PEP.

CONCLUSIONS

Post-ERCP pancreatitis is usually mild to moderate 95% times. Female sex, age younger than 50 years, a benign indication of ERCP, and low bilirubin levels have higher chances of PEP. A combination of rectal diclofenac and hydration with RL does not offer better protection for PEP, as compared with individual prophylaxis.

A 25 mg rectal dose of diclofenac for prevention of post-ERCP pancreatitis in elderly patients

A 50-100 mg rectal dose of diclofenac or indomethacin is recommended for prophylaxis of post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP); however, limited data are available regarding the appropriate dose to prevent PEP in elderly patients. We aimed to evaluate the efficacy and safety of 25 mg diclofenac in preventing PEP in elderly patients. Material and methods: Overall, 276 patients with naive papilla, aged over 75 years, were included in the present study between April 2013 and March 2020. We retrospectively evaluated the risk of PEP in patients over 75 years, administered with or without 25 mg diclofenac 30 min before ERCP using inverse probability of treatment weighting (IPTW) analysis. Results: Patients were categorized into the diclofenac group (83 patients) or non-diclofenac group (193 patients). The incidence rate of PEP in the diclofenac group was significantly lower than that in the non-diclofenac group (4% vs. 14%, p = .01). Multivariate analysis revealed that 25 mg diclofenac was an independent protective factor against PEP in elderly patients aged over 75 years (odds ratio [OR] = 0.17; 95% confidence interval [CI] = 0.04-0.67; p = 0.01). This protective effect of diclofenac against PEP remained robust after IPTW analysis (OR = 0.11; 95% CI = 0.03-0.40; p = .001). No adverse events related to diclofenac were observed. Conclusion: Diclofenac (25 mg) was considered effective and safe for preventing PEP in elderly patients. Our results may provide a new strategy for preventing PEP in elderly patients.

Immediate or Interval Endoscopic Papillary Large-balloon Dilation after Limited Endoscopic Sphincterotomy for Bile Duct Stone Removal

Objective Endoscopic papillary large-balloon dilation (EPLBD) with limited endoscopic sphincterotomy (EST) is widely used for removing multiple large common bile duct (CBD) stones. However, the safety and effectiveness of immediate EPLBD after limited EST and EPLBD at an interval after limited EST is unclear. Thus, this multicenter retrospective study was conducted to examine this matter. Methods Propensity score-matching was performed to adjust the baseline characteristics between the immediate and interval EPLBD groups. We compared the incidence of post-endoscopic retrograde cholangiopancreatography (ERCP) complications and the early outcomes of ERCP between the 2 matched groups, which comprised 66 patients each. Results The complete stone clearance rate in each study group was 100%. The overall incidence of post-ERCP complications in the propensity score-matched interval and immediate EPLBD groups was 3/33 (9.1%) and 1/33 (3.0%), respectively (p=0.61). The immediate EPLBD group had significantly fewer mean ERCP sessions for complete stone removal and a significantly lower rate of endoscopic mechanical lithotripsy (EML) usage than the interval EPLBD group [1.6 vs. 2.4 sessions, p<0.001; and 4/33 (12.1%) vs. 12/33 (36.4%), p=0.042, respectively]. Conclusion The incidence of post-ERCP complications in the immediate EPLBD group was not significantly different from that in the interval EPLBD group. Compared with interval EPLBD, immediate EPLBD may result in a reduced number of ERCP sessions for complete stone clearance and reduce the rate of EML usage.

Efficacy and safety of primary, early and late needle-knife fistulotomy for biliary access

European Society of Gastrointestinal Endoscopy recommends needle-knife fistulotomy (NKF) as the preferred precut technique. However, there is little information on whether NKF performed at different times is associated with different success and adverse event rates. We compared the outcomes of 3 different timings of NKF. This was an observational study conducted at 4 institutions and this was a retrospective analysis of prospectively collected data. We included 330 consecutive patients submitted to NKF attempt for biliary access. Patients were divided into three groups: NKF as an initial procedure for biliary access (group A, n = 121); early NKF defined as after 5 min, 5 attempts, or 2 pancreatic passages (group B, n = 99); and late NKF: after at least 10 min of unsuccessful standard biliary cannulation (group C, n = 110). We assessed the success rate of biliary cannulation at initial ERCP, time to perform NKF until biliary cannulation, overall biliary cannulation rate (second ERCP when initial failure), adverse event rate, and predictors of post-ERCP pancreatitis (PEP). The initial cannulation rate was 98%, 91% and 94% for groups A, B and C respectively, p = 0.08, whereas overall biliary cannulation rate was 100%, 95% and 98%, p = 0.115. The adverse event rate/PEP was 4.1%/2.5%, 7.1%/4% and 10.9%/8.2%, for groups A, B and C respectively, (p = 0.197 and p = 0.190). Median time for creating the fistula was A = 4.0 min, B = 3.2 min, and C = 5.6 min, p < 000.1. Each additional minute spent attempting cannulation increased the odds ratio (OR) for PEP by 1.072, and patients with 3 or more risk factors for pancreatitis had a higher chance of PEP. In conclusion, the timing of NFK does not appear to influence success rates but late NFK is associated with a higher time to create a fistula and an increased risk of pancreatitis. Primary NFK is associated with a high rate of success and a low rate of PEP and deserves additional investigation.

Rectally Administered Low-Dose Diclofenac Has No Effect on Preventing Post-Endoscopic Retrograde Cholangiopancreatography Pancreatitis: A Propensity Score Analysis

OBJECTIVES

We evaluated the preventive effect of low-dose diclofenac (25-50 mg) on post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP) by propensity score matching analysis.

METHODS

We retrospectively analyzed the data of 515 patients who underwent ERCP for the first time with or without the rectal administration of low-dose diclofenac before the procedure. For the purpose of minimization of the intrinsic selection bias, we compared the incidence rate of PEP between the diclofenac and control group after propensity score matching.

RESULTS

Post-ERCP pancreatitis developed in 15 patients (2.9%). There was no significant difference in the incidence of PEP between the diclofenac (2.4%) and control group (3.3%) (P = 0.608). One hundred ninety matched pairs were generated by propensity score matching and analyzed; however, the incidence rate of PEP was the same in both groups (2.1%, P = 1.000). In the subgroup analysis using data of patients with high-risk factors for developing PEP, the incidence rate of PEP was comparable between the diclofenac (3.8%) and control groups (4.0%) (P = 0.917).

CONCLUSIONS

In our propensity score analysis, rectal administration of low-dose diclofenac was not shown to be useful in preventing PEP.

Outcomes and risk factors for ERCP-related complications in a predominantly black urban population

Objective

There is a lack of literature on postendoscopic retrograde cholangiopancreatography (ERCP) complications in predominantly black urban populations of low socioeconomic status. The aim of this study was to determine the incidence and predictors of post-ERCP complications in this patient population.

Design

Retrospective review of ERCP cases performed at two hospitals from 2007 to 2017 was performed. The categories of complications evaluated were overall complications, severe or fatal complications, pancreatitis, bleeding, infection, perforation and cardiopulmonary events. Predictors of complications were determined by univariate analysis.

Results

A total of 1079 ERCP procedures were reviewed. There were 106 complications (9.8%). Twenty-one were severe (1.9%) and 20 were fatal (1.9%). Both post-ERCP pancreatitis (PEP) and post-ERCP bleeding occurred in 18 patients (1.7%) each. Risk factors for overall complications were male sex (OR 1.54), ASA grade IV or V (OR 2.19), prior history of PEP (OR 6.98) and pancreatic duct stent placement (OR 2.75). Those who were ASA grade III or lower (OR 0.4) or who underwent biliary stone extraction (OR 0.62) had fewer complications. PEP was more likely in those with a prior history of PEP (OR 37.6). Those with a suspected or known biliary duct stone had less frequent pancreatitis (OR 0.32). Post-ERCP bleeding was more likely in the presence of cholangitis (OR 8.72).

Conclusion

Outcomes of ERCP in a predominantly black urban population demonstrate a lower incidence of PEP and all-cause mortality compared with historical data reported in the general population. Potential risk factors for post-ERCP complications were identified but require larger studies for validation.

Post-ESWL and post-ERCP pancreatitis in patients with chronic pancreatitis: Do they share the same risks?

BACKGROUND

Endoscopic intervention combined with extracorporeal shock wave lithotripsy (ESWL) is recommended as the first line therapy for large pancreatic stones, yet both can cause adverse events. The aim of the study was to identify the risk factors for post-procedural pancreatitis.

METHODS

Consecutive patients with chronic pancreatitis and pancreatic stones treated with both ESWL and subsequent endoscopic retrograde cholangiopancreatography (ERCP) from October 2016 to December 2019 were prospectively enrolled. Multivariate logistic analyses were performed to detect risk factors for post-ESWL and post-ERCP pancreatitis (PEP).

RESULTS

A total of 714 patients (507 males, 45.60 ± 12.52 years) were included in this study. A total of 80 patients (11.2%) developed post-ESWL pancreatitis,while 33 patients (4.6%) suffered from PEP. Steatorrhea (P = .018), multiple stones (P = .043), and stones located at the head combined with the body or tail of the pancreas (P = .015) were identified as independent protective factors for post-ESWL pancreatitis. The history of acute exacerbations (P = .013), post-ESWL pancreatitis (P < .001) and stricture dilation during ERCP (P = .002) were identified as risk factors for PEP.

CONCLUSIONS

More attention should be paid to patients with post-ESWL pancreatitis, as well as a history of acute exacerbations and stricture dilation during ERCP to prevent PEP. (ClincialTrials.gov number, NCT04619511).

Combination prevention of post-endoscopic retrograde cholangiopancreatography pancreatitis in patients undergoing double-guidewire assisted biliary cannulation: A case-control study with propensity score matching

BACKGROUND AND AIM

Rectal indomethacin and pancreatic duct stenting (PDS) are recommended for the prevention of post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP). However, the effects of the combination of the two methods on preventing PEP are controversial. We hypothesized that some group of difficult patients might benefit from the combination of indomethacin plus PDS (IP) compared with indomethacin alone (IN).

METHODS

Patients with native papilla who underwent endoscopic retrograde cholangiopancreatography in eight tertiary hospitals were screened. They were enrolled if the cannulation proved difficult and post-procedure indomethacin was administered. Propensity score matching (PSM) was used to balance the baseline characteristics between IP and IN groups. The primary outcome was PEP.

RESULTS

Among 4456 patients with available cannulation-related data, 1889 (42.4%) patients had difficult cannulation and received indomethacin. After PSM, both IP and IN groups included 332 patients. PEP was comparable between the two groups (12.7% vs 10.2%, P = 0.329). By subgroup analysis, the PEP rate was found to be lower in the IP group than in the IN group (7.3% vs 18.2%, P = 0.026) in patients undergoing double-guidewire technique (DGT). The results of an additional analysis using PSM in DGT patients were consistent with the subgroup analysis results (7.8% vs 19.4%, P = 0.036).

CONCLUSIONS

The current study indicated that the combined prevention of PEP with indomethacin plus PDS was useful in PEP prevention in patients undergoing DGT. Other groups of patients with difficult cannulation may not benefit from the combination strategy.

Training in endoscopic retrograde cholangio-pancreatography: a critical assessment of the broad scenario of training programs and models

Introduction: Endoscopic Retrograde Cholangio-Pancreatography (ERCP) applications are rapidly evolving toward increasingly complex therapeutic approaches alongside with technological innovations. There are no globally agreed indications on the ERCP training path, which often requires too much time and does not always guarantee adequate skills.Areas covered: Frequency and difficulty of execution are the main objective criteria on which to draw up a training program: novel trainees should approach ERCP first through the simplest and most frequent procedures. An extensive use of training models would reduce the patient's performer-related risks. Amongst a wide variety of models, mechanical simulators have received large approval. In fact, they can be best-suited to each trainee's learning curve thanks to their precision and safety and by virtue of the unlimited repeatability of their use. However, more solid evidences are still needed.Expert opinion: Hands-on ERCP training should systematically employ mechanical simulators at least in the early stages of the learning process. An implementation of these models through sensors that objectively detect abnormalities in the movements would provide detailed feedbacks and deeper awareness. Simulators might also be useful for expert endoscopists to refine their skills. Rapid prototyping and 3D printing might be the way to create customized training models for successful training programs.

Alternative application of percutaneous cholecystostomy in patients with biliary obstruction

PURPOSE

Percutaneous cholecystostomy (PC) is an important modality for acute cholecystitis and has been applied for other clinical scenarios as well. In the present study, we aimed to investigate an alternative use of PC for obstructive jaundice.

METHODS

From January 2012 to December 2018, eligible subjects were selected from patients undergoing PC in our institute. The characteristics, spectrum of underlying disease, indication for PC performance, details of the procedure, and treatment effect were all investigated.

RESULTS

During the study period, 1364 patients underwent PC. Seventy patients fulfilled the defined inclusion criteria. While 47 patients were diagnosed with malignant biliary obstruction with or without cholangitis, 23 patients were diagnosed with nonmalignant biliary obstruction and acute cholangitis. There were 63 patients (90%) diagnosed with acute cholangitis. Pancreatic cancer (n = 24, 51%) and advanced malignancy (n = 28, 59%) were noted mostly in the group with malignant biliary obstruction. Treatment effects were proven by laboratory data, including the white blood cell count, C-reactive protein level, and hepatic function.

CONCLUSION

PC can temporize definitive therapies and serve as an alternative treatment for patients with nonmalignant conditions. For patients with advanced malignancy, PC can serve as a palliative procedure that has a high success rate and low complication rate and effectively relieves biliary obstruction.

Temporal trends and mortality of post-ERCP pancreatitis in the United States: a nationwide analysis

BACKGROUND : Post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP) is the most common and most serious complication of ERCP. Our aim was to estimate the nationwide incidence, temporal trends, and mortality of PEP in the United States and to establish risk factors associated with PEP development. METHODS : This was a retrospective cohort study analyzing Nationwide Inpatient Sample data from 2011 to 2017 using International Classification of Diseases codes. The primary outcomes were trends in PEP incidence and predictors of PEP development. Secondary outcomes were in-hospital mortality, length of hospital stay, and admission to the intensive care unit. RESULTS : Of 1 222 467 adult patients who underwent inpatient ERCP during the study period, 55 225 (4.5 %) developed PEP. The hospital admission rate of PEP increased by 15.3 %, from 7735 in 2011 to 8920 in 2017 (odds ratio [OR] 1.23, 95 % confidence interval [CI] 1.04 - 1.46; P = 0.02). The overall rate of mortality increased from 2.8 % of PEP cases in 2011 to 4.4 % in 2017 (OR 1.62, 95 %CI 1.10 - 2.38; P = 0.01). Multiple patient-related (alcohol use, cocaine use, obesity, chronic kidney disease, heart failure), procedure-related (therapeutic ERCP, sphincterotomy, pancreatic duct stent placement, sphincter of Oddi dysfunction), and hospital-related (teaching hospitals, hospitals located in the West and Midwest) factors that impact the occurrence of PEP were identified. CONCLUSIONS : Our study showed rising hospital admission and mortality rates associated with PEP in the United States. This calls for a greater recognition of this life-threatening complication and amelioration of its risk factors, whenever possible.

Optimal Timing of Endoscopic Intervention After Extracorporeal Shock-Wave Lithotripsy in the Treatment of Chronic Calcified Pancreatitis

OBJECTIVES

The interval between extracorporeal shock-wave lithotripsy (ESWL) and endoscopic retrograde cholangiopancreatography (ERCP) may cause differences in cannulation and stone removal. This study was to investigate the optimal timing of ERCP after ESWL.

METHODS

Patients with chronic calcified pancreatitis, who underwent ESWL and subsequent ERCP in Changhai Hospital from February 2012 to February 2015, were retrospectively analyzed. The interval between ESWL and ERCP was used to divide patients into groups A (<12 hours), B (12-36 hours), and C (>36 hours). Cannulation success, stone clearance, and post-ESWL/ERCP complications were compared.

RESULTS

A total of 507 patients were enrolled. There were no significant differences regarding the successful cannulation and stone removal rates between the 3 groups. In patients without prior ERCP, the successful cannulation rates were 71.4%, 81.9%, and 90.9% (P = 0.004), and the successful clearance rates were 76.2%, 85.1%, and 90.9% (P = 0.031) for these 3 groups, respectively, showing significant differences. There were no differences in the successful cannulation and stone extraction rates for patients with prior ERCP.

CONCLUSIONS

The interval between ESWL and ERCP in chronic calcified pancreatitis patients with prior ERCP is not relevant, while delaying endoscopic intervention is recommended in those with native papilla.

Early precut versus primary precut sphincterotomy to reduce post-ERCP pancreatitis: randomized controlled trial (with videos)

BACKGROUND AND AIMS

Precut sphincterotomy, usually performed after prolonged and failed cannulation, is considered a risk factor for post-ERCP pancreatitis (PEP). There are limited studies on primary needle-knife precut for the prevention of PEP. The aim of this study was to assess the safety and efficacy of primary precut.

METHODS

A randomized controlled trial was conducted in a tertiary care setting on patients who underwent ERCP. Patients were randomized to very early precut (group A, precut after 2 failed attempts of wire-guided sphincterotome cannulation) and primary precut (group B, direct needle-knife precut). All procedures were done by an experienced endoscopist. The primary outcome of the study was to compare the incidence of PEP between the 2 groups.

RESULTS

Three hundred three patients were randomized to group A (n = 152, age 48.2 ± 15.4 years, 61 men) and group B (n = 151, age 46.7 ± 13.8 years, 65 men). There was no significant difference in baseline characteristics and indications for ERCP between the 2 groups. Development of PEP (5.2% vs .67%; P = .04) and asymptomatic hyperamylasemia (12.5% vs 2.6%; P = .01) were lower in group B compared with group A. The bile duct cannulation time (13.8 ± 2.2 vs 7.2 ± 1.7 minutes; P = .001) was lower in group B, whereas the overall cannulation success rate (98% vs 98.6%; P = 1.0) was similar in both the groups.

CONCLUSIONS

Primary precut by an experienced endoscopist results in low risk of PEP. (Clinical trial registration number: CTRI/2017/08/009510.).

Risk Stratification in Post-ERCP Pancreatitis: How Do Procedures, Patient Characteristics and Clinical Indicators Influence Outcomes?

BACKGROUND

Post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis (PEP) remains common, and severe complications are associated with ERCP. There is no previous study detailing the effect of race and gender in a US-based population on risk of PEP.

METHODS

Data were collected on 269 "first-performed" consecutive ERCPs followed by division by race (White vs. African-American) and sex (Female vs. Male). A total of 53 probable risk factors were evaluated by uni- and multivariate analysis followed by outcomes expressed as an odds ratio (OR) (with a 95% confidence interval, 95% CI). Finally, a principal component analysis was performed to construct a risk prediction model for PEP, which can be used by clinicians at bedside.

RESULTS

After analyzing the risk factors based on race and gender-based groups, Caucasian males with PEP are more likely to have prior history of pancreatitis (p = 0.009), lower hemoglobin (p = 0.02)/blood urea nitrogen (BUN) (p = 0.01)/creatinine before ERCP (p = 0.07) and lower BUN (p = 0.01)/creatinine after ERCP (p = 0.07), while Caucasian females with PEP are more likely to have higher white blood cell (WBC) count before ERCP (p = 0.08) and lower amylase (p = 0.10)/bilirubin (p = 0.09)/aspartate aminotransferase (AST) after ERCP (p = 0.08). African-American males with PEP are more likely to have lower weight (p = 0.001)/smaller height (p = 0.0005)/lower alkaline phosphatase (p = 0.002)/AST (p = 0.04)/alanine transaminase (ALT) (p = 0.03) before ERCP and lower alkaline phosphatase (p = 0.002)/AST (p = 0.01)/ALT (p = 0.004) after ERCP, while African-American females with PEP are more likely to have prior history of pancreatitis (p = 0.004)/higher lipase before (p = 0.0001) and after (p = 0.05) ERCP along with increased risk with pancreatic duct cannulation (p = 0.0001) and injection (p = 0.0001)/biliary sphincterotomy (p = 0.0001). Importantly, prior history of ERCP, elevated AST after ERCP, and BUN prior to ERCP were found to be important clinical features predicting post-ERCP pancreatitis. To our knowledge, this is a first known attempt at developing a risk scoring system for PEP in a US population with decision tree learning.

CONCLUSIONS

It is very evident that both patient and procedure-related risk factors vary by race and gender in the US population, leading to the development of a new risk assessment tool for PEP that can be used in clinical practice. We need to follow up with a larger prospective study to validate this novel race and gender-based risk scoring system for PEP.

Impact of Hospital Volume and the Experience of Endoscopist on Adverse Events Related to Endoscopic Retrograde Cholangiopancreatography: A Prospective Observational Study

Background/Aims

Few studies have addressed the relationship between the occurrence of adverse events (AEs) in endoscopic retrograde cholangiopancreatography (ERCP) and hospital case volume or endoscopist’s experience with inconsistent results. The aim of our study was to investigate the impact of hospital case volume and endoscopist’s experience on the AEs associated with ERCP and to analyze patient- and procedure-related risk factors for post-ERCP AEs.

Methods

From January 2015 to December 2015, we prospectively enrolled patients with naïve papilla who underwent ERCP at six centers. Patient- and procedure-related variables were recorded on data collection sheets at the time of and after ERCP.

Results

A total of 1,191 patients (median age, 71 years) were consecutively enrolled. The overall success rate of biliary cannulation was 96.6%. Overall, 244 patients (20.5%) experienced post-ERCP AEs, including pancreatitis (9.0%), bleeding (11.8%), perforation (0.4%), cholangitis (1.2%), and others (0.9%). While post-ERCP pancreatitis (PEP) was more common when the procedure was performed by less experienced endoscopists, bleeding was more common in high-volume centers and by less experienced endoscopists. Multivariate analysis showed that a less experience in ERCP was significantly associated with PEP (odds ratio [OR], 1.630; 95% confidence interval [CI], 1.050 to 2.531; p=0.030) and post-ERCP bleeding (OR, 1.439; 95% CI, 1.003 to 2.062; p=0.048).

Conclusions

Our study demonstrated that overall AEs following ERCP were associated with the experience of the endoscopist. To minimize post-ERCP AEs, rigorous training with a sufficient case volume is required, and treatment strategies should be modified according to the endoscopist’s expertise.

Management of bile leak following blunt liver injury: a proposed guideline

BACKGROUND

Bile leak following blunt liver trauma is uncommon. Management is difficult due to complex vasculo-biliary and liver parenchymal injury and lack of consensus on optimal care compared with bile leak following elective hepatectomy especially in regards to endoscopic retrograde pancreaticocholangiography (ERCP) timing and patient selection.

METHODS

This is a retrospective cohort study from a level 1-trauma centre of patients with bile leak following blunt liver injury between July 2010 and December 2019 identified from the trauma registry. Clinical data retrieved include patient demographics, injury severity score, liver injury grading and its associated complications and treatment. This was supplemented by surgical audit database and patients' electronic medical record.

RESULTS

There were 31 bile leaks amongst 639 patients with blunt liver trauma (4.9%). Bile leak was associated with higher liver injury grade (odds ratio (OR) 36, P = 0.001), hepatic embolization (OR 16, P = 0.003) and need for trauma laparotomy (OR 14, P = 0.024). ERCP was performed in 58.1% (n = 18). This was complicated in 27.7% (n = 5) by mild pancreatitis (n = 1) and intra-abdominal sepsis (n = 4) requiring surgical drainage of abscess (n = 2) and liver resection (n = 1). Bile leak settled conservatively (including percutaneous drainage) without ERCP in the remaining patients (41.9%). Overall mortality was not increased in those with bile leak (P = 0.998).

CONCLUSION

Bile leaks resolved conservatively in 41.9% of patients. Complications following ERCP were seen in 27.7%, frequently requiring intervention. Failure of conservative management was more likely in patients with hepatic embolization, in whom early ERCP remains appropriate. ERCP should otherwise be reserved for those who fail conservative management to minimize infective complications.

Development of an Online App to Predict Post-Endoscopic Retrograde Cholangiopancreatography Adverse Events Using a Single-Center Retrospective Cohort

INTRODUCTION

Endoscopic retrograde cholangiopancreatography (ERCP) is a technically demanding procedure with a high risk for adverse events (AEs).

AIM

evaluate patient- and procedure-related risk factors for ERCP-related AEs and develop an online app to estimate risk of AEs.

METHODS

retrospective study of 1,491 consecutive patients who underwent 1,991 ERCPs between 2012 and 2017 was conducted. AEs definition and severity were classified according to most recent ESGE guidelines. Each variable was tested for association with occurrence of overall AEs, post-ERCP pancreatitis (PEP) and cholangitis. For each outcome, 2 regression models were built, from which an online Shiny-based app was created.

RESULTS

Overall AE rate was 15.3%; in 19 procedures, >1 AE occurred. Main post-ERCP AE was PEP (7.5%), followed by cholangitis (4.9%), bleeding (1.3%), perforation (1%), cardiopulmonary events (0.9%), and cholecystitis (0.3%). Seventy-eight percent of AEs were mild/moderate; of severe (n = 55) and fatal (n = 20) AEs, more than half were related to infection, cardiac/pulmonary AEs, and perforation. AE-related mortality rate was 1%. When testing precannulation, procedural covariates, and ERCP findings, AE occurrence was associated with age (odds ratio [OR] 0.991), previous PEP (OR 2.198), ERCP complexity grade III/IV (OR 1.924), standard bile duct cannulation (OR 0.501), sphincterotomy (OR 1.441), metal biliary stent placement (OR 2.014), periprocedural bleeding (OR 3.024), and biliary duct lithiasis (OR 0.673).

CONCLUSION

Our app may allow an optimization of the patients' care, by helping in the process of decision-making, not only regarding patient or endoscopist's selection but also definition of an adequate and tailored surveillance plan after the procedure.

Comparable safety of ERCP in symptomatic and asymptomatic patients with common bile duct stones: a propensity-matched analysis

BACKGROUND

The safety of endoscopic retrograde cholangiopancreatography (ERCP) for asymptomatic common bile duct (CBD) stones patients has not been thoroughly elucidated. This study attempted to compare the incidence and severity of ERCP complications in asymptomatic and symptomatic patients with CBD stones and to provide evidence for the treatment of asymptomatic CBD stones.

METHODS

The clinical data of patients were retrospectively analyzed. These patients were divided into the asymptomatic CBD stones group and the symptomatic CBD stones group. Propensity score matching (PSM) was used to match the two groups. The incidence and severity of postoperative complications of ERCP in the two groups were analyzed.

RESULTS

A total of 79 patients who had asymptomatic CBD stones and 795 patients who had symptomatic CBD stones were included in this study. After PSM, 79 patients from the asymptomatic CBD group and 316 patients from the symptomatic CBD stones group were identified. Before and after PSM, no significant differences in the incidence and severity of post-ERCP pancreatitis (PEP) were noted between the two groups (p > .05). In addition, no differences in the incidence and severity of other complications, including acute cholangitis, bleeding and perforation, between the two groups were observed before and after PSM (p > .05).

CONCLUSIONS

Patients with asymptomatic CBD stones do not exhibit an increased risk of ERCP-related complications compared with those with symptomatic CBD stones. ERCP was observed to be equally safe and efficacious for patients with asymptomatic versus symptomatic CBD stones.

Relationship between papilla-related variables and post endoscopic retrograde cholangiopancreatography pancreatitis: A multicenter, prospective study

BACKGROUND AND AIM

Papilla with hooknose or long protruding shape may increase the difficulty of cannulation during endoscopic retrograde cholangiopancreatography (ERCP). However, the relationship between papilla anatomy and complications of ERCP has not been fully understood. We aimed to investigate the effect of major duodenal papilla morphology on post-ERCP pancreatitis (PEP) and the procedure of cannulation.

METHODS

Patients with native papilla who underwent ERCP were recruited to this multicenter study. Papilla-related variables were collected, including the length of long axis (L), short axis (S) and opening width (OW), transverse fold, periampullary diverticulum (PAD), papilla location, orientation, swelling, and presence of duodenal stenosis. Demographic data and the procedure of cannulation were also prospectively evaluated. The primary outcome was PEP incidence. Multivariate analysis was used to identify high risk factors for PEP.

RESULTS

Six hundred and fifty-eight patients were enrolled. Overall PEP incidence was 4.7% (31/658). The papilla of patients complicated with PEP had higher long to short axis (L/S) ratio (odds ratio [OR] 3.84, 95% confidence interval [CI]: 1.37-10.74, P = 0.010), higher long axis to opening width (L/OW) ratio (OR 1.35, 95%CI: 1.06-1.71, P = 0.014), more transverse folds (OR 2.53, 95%CI: 1.02-6.26, P = 0.044), and less periampullary diverticulum (OR 0.21, 95%CI: 0.06-0.70, P = 0.011). Multivariate analysis revealed that the indication of common bile duct stones, normal bilirubin, inadvertent pancreatic duct cannulation > 1, L/S ratio ≥ 1.5, and absence of PAD were independent risk factors for PEP.

CONCLUSION

Besides patient-related and procedure-related factors, papilla-related variables, such as L/S ratio and PAD, can be considered as a third type of factors associated with PEP (Clinicaltrials.gov number: NCT03550768).

Influence of fully covered metal stenting on the risk of post-endoscopic retrograde cholangiopancreatography pancreatitis: A large multicenter study·

BACKGROUND AND AIM

Fully covered self-expandable metal stents (FCSEMSs) have been increasingly used in the management of benign or malignant biliary disorders. However, the risk of post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP) with transpapillary placement of the FCSEMS remains controversial. This study therefore aimed to investigate the risk of PEP in patients who received FCSEMS implantation.

METHODS

In total, 602 patients who underwent endoscopic transpapillary FCSEMS placement at five Chinese medical centers, between 2011 and 2018, were included in this retrospective study. Patients who were younger than 18 years and with stent placement above the papilla were excluded from the study. PEP and the risk factors were reviewed.

RESULTS

PEP occurred in 56 (9.3%) patients, and eight (1.3%) of them experienced moderate-to-severe PEP. The incidence of PEP rose to 14.6% (51/349) when patients had no pancreatic duct (PD) dilation, and even to 18.6% if no prophylactic approaches were adopted. Prophylactic PD stenting showed better efficacy in reducing the incidence of PEP than did rectal use of indomethacin (3.5% vs 10.8%, P = 0.023). Multivariate logistic regression revealed that difficult cannulation (OR 2.837, 95% CI 1.245-6.465, P = 0.013), PD dilation (OR 0.145, 95% CI 0.05-0.422, P < 0.001), and PD stenting (OR 0.247, 95% CI 0.089-0.686, P = 0.007) were significantly associated with PEP risk. Post-procedure cholecystitis was found in 4.0% of patients.

CONCLUSION

The risk of post-procedure pancreatitis is modestly increased in patients receiving transpapillary FCSEMS placement, particularly when there is absence of PD dilation. Thus, prophylactic pancreatic stenting is recommended in such a condition.

Endoscopic Management of Pancreaticobiliary Disease

The evolution of advanced pancreaticobiliary endoscopy in the past 50 years is remarkable. Endoscopic retrograde cholangiopancreatography (ERCP) has progressed from a diagnostic test to an almost entirely therapeutic procedure. The endoscopist must have a clear understanding of the indications for ERCP to avoid unnecessary complications, including post-ERCP pancreatitis. Endoscopic ultrasound initially was used as a diagnostic tool but now is equipped with accessary channels allowing endoscopic ultrasound-guided interventions in various pancreaticobiliary conditions. This review discusses the endoscopic management of common pancreatic and biliary diseases along with the techniques, indications, outcomes, and complications of pancreaticobiliary endoscopy.

Can T-tube drainage be replaced by primary suture technique in laparoscopic common bile duct exploration? A meta-analysis of randomized controlled trials

BACKGROUND

Although laparoscopic common bile duct exploration (LCBDE) is considered the best treatment and has the advantages of being minimally invasive for common bile duct (CBD) stones, the choice of T-tube drainage (TTD) or primary duct closure (PDC) after LCBDE is still controversial. Therefore, the aim of the study was to compare the superiority of PDC versus TTD after LCBDE for choledocholithiasis.

METHODS

All potential studies which compare the surgical effects between PDC with TTD were electronically searched for in PubMed, Web of Science, and the Cochrane library databases up to November 2019. Data synthesis and statistical analysis were carried out using RevMan 5.3 software.

RESULTS

In total, six randomized controlled trials with 604 patients (307 in the PDC group and 297 in the TTD group) were included in the current meta-analysis. As compared with the TTD group, the pooled data showed that PDC group had shorter operating time (WMD = -24.30; 95% CI = -27.02 to -21.59; p < 0.00001; I² = 0%; p < 0.88), less medical expenditure (WMD = -2255.73; 95% CI = -3330.59 to -1180.86; p < 0.0001; I² = 96%; p < 0.00001), shorter postoperative hospital stay (OR = -2.88; 95% CI = -3.22 to -2.54; p < 0.00001; I² = 60%; p < 0.03), and lower postoperative complications (OR = 0.49; 95% CI = 0.31 to 0.78; p = 0.77; I² = 0%; p = 0.003). There were no significant differences between the two groups concerning bile leakage (OR = 0.74; 95% CI = 0.36 to 1.53; p = 0.42; I² = 0%; p = 0.90) and retained stones (OR = 0.96; 95% CI = 0.36 to 2.52; p < 0.93; I² = 0%; p < 0.66).

CONCLUSIONS

LCBDE with PDC should be performed as a priority alternative compared with TTD for choledocholithiasis.

Clinical outcome of endoscopic retrograde cholangiopancreatography for choledocholithiasis in end-stage renal disease patients on hemodialysis

BACKGROUND/AIMS

Endoscopic retrograde cholangiopancreatography (ERCP) is used as a curative method for choledocholithiasis, but little is known about ERCP for patients with end-stage renal disease (ESRD) on hemodialysis (HD). The aim of the current study was to evaluate the efficacy and safety of ERCP for patients with ESRD on HD and to identify the risk factors of ERCP-related bleeding.

MATERIALS AND METHODS

The medical records of 61 ESRD patients with choledocholithiasis who underwent ERCP were retrospectively investigated with respect to successful bile duct stone removal and procedure-related adverse events such as pancreatitis, bleeding, and cholangitis.

RESULTS

For the study subjects, the overall stone removal success rate was 96.7%, and the overall ERCP-related adverse event rate was 21.3% (pancreatitis, 4.9%; bleeding, 13.1%; cholangitis, 6.6%). Endoscopic sphincterotomy (EST) was found to be associated with hemorrhage (p=0.02), and the occurrence of hemorrhage in patients who underwent EST with or without endoscopic papillary balloon dilation (EPBD) was significantly higher than that in patients who underwent EPBD alone (Odds ratio 1.27, 95% confidence interval 1.075-1.493, p=0.02).

CONCLUSION

ERCP for ESRD patients was found to be feasible and safe. However, EST was significantly related to hemorrhagic events. EPBD reduced the risk of hemorrhage and was as effective as EST in terms of stone removal.

Predictors of postendoscopic retrograde cholangiopancreatography pancreatitis, analysis of more than half a million procedures performed nationwide over the last 15 years

BACKGROUND AND AIM

Post-ERCP pancreatitis (PEP) is the most common complication following endoscopic retrograde cholangiopancreatography (ERCP). It is still controversial whether the presence of a trainee would increase the risk of PEP. Additionally, the effects of demographic factors and comorbidities on the risk and severity of PEP are not fully understood. Our aim was to evaluate these factors using national database.

METHODS

Nationwide Inpatient Sample 2000-2014 was used to identify adult patients admitted with biliary obstruction without acute pancreatitis and had an inpatient ERCP. PEP was defined as having a subsequent diagnosis of acute pancreatitis. The presence of major organs failure marked moderate-severe PEP. Demographic information, hospital characteristics, and ERCP intervention types were collected.

RESULTS

We included 654 394 patients. Overall PEP rate was 5.4%. The PEP rate was lower in teaching (4.8%) compared with nonteaching (6.2%, P < 0.001) hospitals. The highest PEP rate was observed among patients undergoing Sphincter of Oddi Manometry (15.1%, odds ratio [OR] = 2.5, P < 0.001) as compared to diagnostic cholangiography (4.4%). Asians and Hispanics had higher rate of PEP (10% and 7.9%, respectively) compared with Caucasians and African Americans (4.9% and 5%, respectively, P < 0.001). Multivariate analysis showed that after controlling for the ERCP intervention types, Asians and Hispanics continued to have higher odds of PEP (OR = 1.3, P < 0.001). Seventeen percent of patients were classified as moderate-severe PEP. Older patients (OR = 3.2, P < 0.001), males (OR = 1.4, P < 0.001), and high comorbidities (1.3, P < 0.001) were major predictors of moderate-severe PEP.

CONCLUSION

No evidence of higher PEP rates in teaching hospitals. Asians and Hispanics had higher PEP rates. Although ERCP intervention type is the major PEP predictor, its severity is dependent on patient characteristics.

Diagnostic Value of Serum Amylase Levels Indicating Computed Tomography-Defined Post-Endoscopic Retrograde Cholangiopancreatography Pancreatitis: A Prospective Multicenter Observational Study

OBJECTIVE

Post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis involves persistent serum amylase levels of 3 times or more the standard upper limit. However, these criteria were mostly based on retrospective studies and not necessarily supported by diagnostic imaging. Our prospective study aimed to investigate cutoff serum amylase levels suggesting post-ERCP pancreatitis using computed tomography as the criterion standard.

METHODS

We prospectively followed 2078 cases. Computed tomography was performed in patients whose serum amylase levels exceeded the institutional upper limit 12 to 24 hours after ERCP. Two expert radiologists blindly assessed the images and judged the presence or absence of pancreatitis. Correlations between serum amylase levels with pancreatitis were investigated using receiver operating characteristic analysis.

RESULTS

Amylase levels increased in 416 (23.2%) of 1789 cases included, and 350 cases were analyzed using computed tomography. Post-endoscopic retrograde cholangiopancreatography pancreatitis was diagnosed in 12.0% (214/1789). The cutoff amylase levels for judging pancreatitis after 12 to 24 hours was 2.75 times higher than the institutional upper limit, with an area under the curve of 0.77.

CONCLUSIONS

The appropriate cutoff serum amylase level for judging post-ERCP pancreatitis at 12 to 24 hours after ERCP was 2.75 times higher than the institutional upper limit. These results may clarify the definition of post-ERCP pancreatitis.

Post-endoscopic retrograde cholangiopancreatography pancreatitis prevention using topical epinephrine: systematic review and meta-analysis

Background and study aims  Post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP) is a common complication of endoscopic retrograde cholangiopancreatography (ERCP). Multiple drugs and techniques have been studied for the prevention of PEP. Topical epinephrine has shown mixed results and is still not widely accepted as an alternative for prevention of PEP. We performed a systematic review and meta-analysis to evaluate the efficacy of topical epinephrine in preventing PEP. Methods  A comprehensive literature review was conducted by searching Cochrane library database, Embase and PubMed up to August 2019, to identify all studies that evaluated use of topical epinephrine alone or in conjunction with other agents for prevention of PEP. Outcomes included prevention of PEP with use of topical epinephrine and evaluation of whether addiing epinephrine provides any additional benefit in preventing PEP. All analysis was conducted using Revman 5.3. Results  Eight studies, including six randomized controlled trials and two observational studies with 4123 patients, were included in the meta-analysis. Overall, there was no difference in incidence of PEP in patients who underwent ERCP and were treated with epinephrine spray versus those who were not, RR = 0.63 (CI 0.32-1.24) with heterogeneity (I2 = 72 %). However, on a subgroup analysis, topical epinephrine significantly decreases the risk of PEP when compared to placebo alone (means no intervention was done including no rectal indomethacin)., RR = 0.32 (0.18-0.57). In another subgroup analysis, there was no statistically significant difference in using topical epinephrine along with rectal indomethacin in preventing PEP compared to rectal indomethacin alone RR = 0.87 (0.46-1.64). Conclusion  Topical epinephrine does not provide any additional benefit in preventing PEP when used in conjunction with rectal indomethacin. In subgroup analysis, topical epinephrine appeared to decrease risk of PEP in the absence of rectal indomethacin, and could be considered when rectal indomethacin is unavailable or if there is a contraindication to its use.