Risk factors for recurrence of common bile duct stones after surgical treatment and effect of ursodeoxycholic acid intervention

BACKGROUND Endoscopic retrograde cholangiopancreatography(ERCP)is an accurate diagnostic method for choledocholithiasis and treatment option for stone removal.Additionally,ursodeoxycholic acid(UDCA)can dissolve cholesterol stones and prevent their development and reappearance by lowering the cholesterol concen-tration in bile.Despite these treatment options,there are still patients who experience stone recurrence.The clinical data of 100 patients with choledochal stones who were hospitalized at the Yixing People’s Hospital and underwent ERCP for successful stone extraction between June 2020 and December 2022 were retrospectively collected.According to the post-ERCP treatment plan,100 patients were classified into UDCA(n=47)and control(n=53)groups.We aimed to assess the clinical efficacy and rate of relapse in the two patient populations.We then collected information(basic demographic data,clinical characteristics,and serum biochemical indicators)and determined the factors contributing to relapse using logistic regression analysis.Our secondary goal was to determine the effects of UDCA on liver function after ERCP.Compared to the control group,the UDCA group demonstrated a higher clinical effectiveness rate of 92.45%vs 78.72%(P<0.05).No significant differences were observed in liver function indices,including total bilirubin,direct bilirubin,gamma-glutamyl transpeptidase,alanine aminotransferase,alkaline phosphatase,and aspartate aminotransferase,between the two groups before treatment.After treatment,all liver function indices were significantly reduced.Comparing the control vs UDCA groups,the UDCA group exhibited significantly lower levels of all indices(55.39±6.53 vs 77.31±8.52,32.10±4.62 vs 45.39±5.69,142.32±14.21 vs 189.63±16.87,112.52±14.25 vs 149.36±15.36,122.61±16.00 vs 171.33±22.09,96.98±10.44 vs 121.35±11.57,respectively,all P<0.05).The stone recurrence rate was lower in the UDCA group(13.21%)in contrast with the control group(44.68%).Periampullary diverticula(OR:6.00,95%CI:1.69-21.30),maximum stone diameter(OR:1.69,95%CI:1.01-2.85),stone quantity>3(OR:4.23,95%CI:1.17-15.26),and positive bile culture(OR:7.61,95%CI:2.07-27.91)were independent factors that influenced the relapse of common bile duct stones after ERCP(P<0.05).Furthermore,postoperative UDCA was identified as a preventive factor(OR:0.07;95%CI:0.08-0.09).CONCLUSION The intervention effect of UDCA after ERCP for common bile duct stones is adequate,providing new research directions and references for the prevention and treatment of stone recurrence.

Clinical efficacy of laparoscopic cholecystectomy combined with endoscopic papillary balloon dilation in treatment of gallbladder stones with common bile duct stones: A retrospective study

BACKGROUND The incidence of cholelithiasis has been on the rise in recent years,but the choice of procedure is controversial.AIM To investigate the efficacy of laparoscopic cholecystectomy(LC)combined with endoscopic papillary balloon dilation(EPBD)in patients with gallbladder stones(GS)with common bile duct stones(CBDS).METHODS The clinical data of 102 patients with GS combined with CBDS were selected for retrospective analysis and divided into either an LC+EPBD group(n=50)or an LC+endoscopic sphincterotomy(EST)group(n=52)according to surgical methods.Surgery-related indexes,postoperative recovery,postoperative complications,and expression levels of inflammatory response indexes were compared between the two groups.RESULTS Total surgical time,stone free rate,rate of conversion to laparotomy,and successful stone extraction rate did not differ significantly between the LC+EPBD group and LC+EST group.Intraoperative hemorrhage,time to ambulation,and length of hospitalization in the LC+EPBD group were lower than those of the LC+EST group(P<0.05).The rate of total complications of the two groups was 9.80%and 17.65%,respectively,and the difference was not statistically significant.No serious complications occurred in either group.At 48 h postoperatively,the expression levels of interleukin-6,tumor necrosis factor-α,high-sensitivity Creactive protein,and procalcitonin were lower in the LC+EPBD group than in the LC+EST group(P<0.05).At 3 d postoperatively,the expression levels of aspartate transaminase,alanine transaminase,and total bilirubin were lower in the LC+EPBD group than in the LC+EST group(P<0.05).CONCLUSION LC combined with EPBD and LC combined with EST are both effective procedures for the treatment of GS with CBDS,in which LC combined with EPBD is beneficial to shorten the patient’s hospitalization time,reduce the magnitude of elevated inflammatory response indexes,and promote postoperative recovery.

Surgical strategies for challenging common bile duct stones in the endoscopic era: A comprehensive review of current evidence

While endoscopic retrograde cholangiopancreatography(ERCP)remains the primary treatment modality for common bile duct stones(CBDS)or choledocho-lithiasis due to advancements in instruments,surgical intervention,known as common bile duct exploration(CBDE),is still necessary in cases of difficult CBDS,failed endoscopic treatment,or altered anatomy.Recent evidence also supports CBDE in patients requesting single-step cholecystectomy and bile duct stone removal with comparable outcomes.This review elucidates relevant clinical anatomy,selection indications,and outcomes to enhance surgical understanding.The selection between trans-cystic(TC)vs trans-choledochal(TD)approaches is described,along with stone removal techniques and ductal closure.Detailed surgical techniques and strategies for both the TC and TD approaches,including instrument selection,is also provided.Additionally,this review comprehensively addresses operation-specific complications such as bile leakage,stricture,and entrapment,and focuses on preventive measures and treatment strategies.This review aims to optimize the management of CBDS through laparoscopic CBDE,with the goal of improving patient outcomes and minimizing risks.

Comprehensive review on small common bile duct stones

Common bile duct stones are among the most common conditions encountered by endoscopists.Therefore,it is well researched;however,some items,such as indications for endoscopic papillary balloon dilatation(EPBD),safety of EPBD and endoscopic sphincterotomy in patients receiving dual antiplatelet therapy or direct oral anticoagulant,selection strategy for retrieval balloons and baskets,lack adequate evidence.Therefore,the guidelines have been updated with new research,while others remain unchanged due to weak evidence.In this review,we comprehensively summarize the standard methods in guidelines and new findings from recent studies on papillary dilation,stone retrieval devices,difficult-to-treat cases,troubleshooting during the procedure,and complicated cases of cholangitis,cholecystolithiasis,or distal biliary stricture.

Cholangioscopy-assisted extraction through novel papillary support for small-calibre and sediment-like common bile duct stones

BACKGROUND To date,endoscopic retrograde cholangiopancreatography has become a wellestablished treatment for common bile duct(CBD)stones.However,it is not suitable for some special patients,such as pregnant women,children or those who cannot stop taking anti-coagulation/anti-platelet agents because of radiation injury and the risk of postoperative bleeding resulting from endoscopic sphincterotomy.To overcome these two problems,this study introduced cholangioscopy-assisted extraction through a novel papillary support for small-calibre and sediment-like CBD stones.AIM To assess the feasibility and safety of cholangioscopy-assisted extraction through a novel papillary support(CEPTS)for small-calibre and sediment-like common bile duct(CBD)stones.METHODS This Retrospective study was approved by the Ethics Committee of the Chinese PLA General Hospital.We designed a covered single dumbbell-style papillary support between 2021 and 2022.Between July 2022 and September 2022,7 consecutive patients with small-calibre(cross diameter≤1.0 cm)or sediment-like CBD stones underwent CETPS procedures in our center.The clinical characteristics and treatment outcomes of these 7 patients were extracted from a prospectively collected database.And the related data were analyzed.Informed consent was obtained from all participating patients.RESULTS A total of 2 patients had yellow sediment-like CBD stones,and aspiration extraction was performed after the insertion of papillary support.Of the 5 patients with clumpy CBD stones(0.4-1.0 cm),2 underwent basket extraction under direct vision for a single stone(0.5-1.0 cm,black and black grey),1 underwent balloon plus aspiration extraction under direct vision for 5 stones(0.4-0.6 cm,brown),and 2 underwent aspiration extraction only for a single stone(0.5-0.6 cm,yellow,none).Technical success,namely,no residual stones in the CBD or left and right hepatic ducts,was achieved in all 7 cases(100%).The median operating time was 45.0 minutes(range 13.0–87.0 minutes).Postoperative pancreatitis(PEP)occurred in one case(14.3%).Hyperamylasaemia without abdominal pain was noted in 2 of 7 patients.No residual stones or cholangitis were found during the follow-up.CONCLUSION CETPS appeared to be feasible to treat patients with small-calibre or sediment-like CBD stones.Patients,especially pregnant women and those who cannot stop anticoagulation/anti-platelet agents,could benefit from this technique.

Asymptomatic bile duct stones:The devil is in the details

Common bile duct(CBD)stones are a common biliary tract disease.For asymp-tomatic CBD stones,stone removal by endoscopic retrograde cholangiopancreato-graphy(ERCP)is recommended in available guidelines.Because asymptomatic CBD stones is a benign disease with no noticeable symptoms,the risk vs benefit strategy should be thoroughly considered before performing ERCP in these patients.Clinical care review,technical aspects of the procedure,and patient preferences should also be considered.

Two-stage vs single-stage management for concomitant gallstones and common bile duct stones

AIM:To evaluate the safety and effectiveness of twostage vs single-stage management for concomitant gallstones and common bile duct stones.METHODS:Four databases,including PubMed,Embase,the Cochrane Central Register of Controlled Trials and the Science Citation Index up to September 2011,were searched to identify all randomized controlled trials(RCTs).Data were extracted from the studies by two independent reviewers.The primary outcomes were stone clearance from the common bile duct,postoperative morbidity and mortality.The secondary outcomes were conversion to other procedures,number of procedures per patient,length of hospital stay,total operative time,hospitalization charges,patient acceptance and quality of life scores.RESULTS:Seven eligible RCTs [five trials(n = 621) comparing preoperative endoscopic retrograde cholangiopancreatography(ERCP)/endoscopic sphincterotomy(EST) + laparoscopic cholecystectomy(LC) with LC + laparoscopic common bile duct exploration(LCBDE);two trials(n = 166) comparing postoperative ERCP/EST + LC with LC + LCBDE],composed of 787 patients in total,were included in the final analysis.The metaanalysis detected no statistically significant difference between the two groups in stone clearance from the common bile duct [risk ratios(RR) =-0.10,95% confidence intervals(CI):-0.24 to 0.04,P = 0.17],postoperative morbidity(RR = 0.79,95% CI:0.58 to 1.10,P = 0.16),mortality(RR = 2.19,95% CI:0.33 to 14.67,P = 0.42),conversion to other procedures(RR = 1.21,95% CI:0.54 to 2.70,P = 0.39),length of hospital stay(MD = 0.99,95% CI:-1.59 to 3.57,P = 0.45),total operative time(MD = 12.14,95% CI:-1.83 to 26.10,P = 0.09).Two-stage(LC + ERCP/EST) management clearly required more procedures per patient than single-stage(LC + LCBDE) management.CONCLUSION:Single-stage management is equivalent to two-stage management but requires fewer procedures.However,patient's condition,operator's expertise and local resources should be taken into account in making treatment decisions.

Endoscopic papillary large balloon dilation vs endoscopic sphincterotomy for retrieval of common bile duct stones:A meta-analysis

AIM: To compare the efficacy and safety of endoscopic papillary large balloon dilation (EPLBD) with endoscopic sphincterotomy (EST) in retrieval of common bile duct stones (&#x02265; 10 mm).

Single-session minimally invasive management of common bile duct stones

Up to 18% of patients submitted to cholecystectomy had concomitant common bile duct stones.To avoid serious complications,these stones should be removed.There is no consensus about the ideal management strategy for such patients.Traditionally,open surgery was offered but with the advent of endoscopic retrograde cholangiopancreatography(ERCP) and laparoscopic cholecystectomy(LC) minimally invasive approach had nearly replaced laparotomy because of its well-known advantages.Minimally invasive approach could be done in either twosession(preoperative ERCP followed by LC or LC followed by postoperative ERCP) or single-session(laparoscopic common bile duct exploration or LC with intraoperative ERCP).Most recent studies have found that both options are equivalent regarding safety and efficacy but the singlesession approach is associated with shorter hospital stay,fewer procedures per patient,and less cost.Consequently,single-session option should be offered to patients with cholecysto-choledocholithiaisis provided that local resources and expertise do exist.However,the management strategy should be tailored according to many variables,such as available resources,experience,patient characteristics,clinical presentations,and surgical pathology.

Outcome of a session of extracorporeal shock wave lithotripsy before endoscopic retrograde cholangiopancreatography for problematic and large common bile duct stones

AIM To compare the efficacy of a session of extracorporeal shock wave lithotripsy(ESWL) before endoscopic retrograde cholangiopancreatography(ERCP) vs ERCP only for problematic and large common bile duct(CBD) stones.METHODS Adult patients with CBD stones for whom initial ERCP was unsuccessful because of the large size of CBD stones were identified. The patients were randomized into two groups,an "ESWL + ERCP group" and an "ERCP-only" group. For ESWL + ERCP cases,ESWL was performed prior to ERCP. Clearance of the CBD,complications related to the ESWL/ERCP procedure,frequency of mechanical lithotripsy use and duration of the ERCP procedure were evaluated in both groups.RESULTS There was no significant difference in baseline characteristics between the two groups. A session of ESWL before ERCP compared with ERCP only resulted in similar outcomes in terms of successful stone removal within the first treatment session(74.2% vs 71.0%,P = 0.135),but a higher clearance rate within the second treatment session(84.4% vs 51.6%,P = 0.018) and total stone clearance(96.0% vs 86.0%,P = 0.029). Moreover,ESWL prior to ERCP not only reduced ERCP procedure time(43 ± 21 min vs 59 ± 28 min,P = 0.034) and the rate of mechanical lithotripsy use(20% vs 30%,P = 0.025),but also raised the clearance rate of extremely large stones(80.0% vs 40.0%,P = 0.016). Post-ERCP complications were similar for the two groups.CONCLUSION Based on the higher rate of successful stone removal and minimal complications,ESWL prior to ERCP appears to be a safe and effective treatment for the endoscopic removal of problematic and large CBD stones.

Outcome of simple use of mechanical lithotripsy of difficult common bile duct stones

AIM: The usual bile duct stone may be removed by means of Dormia basket or balloon catheter, and results are quite good. However, the degree of difficulty is increased when stones are larger. Studies on the subject reported many cases where mechanical lithotripsy is combined with a second technique, e.g. electrohydraulic lithotripsy (EHL), where stones are crushed using baby-mother scope electric shock. The extracorporeal shock-wave lithotripsy (ESWL) or laser lithotripsy also yields an excellent success rate of greater than 90%. However, the equipment for these techniques are very expensive; hence we opted for the simple mechanical lithotripsy and evaluated its performance. METHODS: During the period from August 1996 to December 2002, Mackay Memorial Hospital treated 304 patients suffering from difficult bile duct stones (stone>1.5 cm or stones that could not be removed by the ordinary Dormia basket or balloon catheter). These patients underwent endoscopic papillotomy (EPT) procedure, and stones were removed by means of the Olympus BML-4Q lithotripsy. A follow-up was conducted on the post-treatment conditions and complications of the patients. RESULTS: Out of the 304 patients, bile duct stones were successfully removed from 272 patients, a success rate of about 90%. The procedure failed in 32 patients, for whom surgery was needed. Out of the 272 successfully treated patients, 8 developed cholangitis, 21 developed pancreatitis, and 10 patients had delayed bleeding, and no patient died. Among these 272 successful removal cases, successful bile duct stone removal was achieved after the first lithotripsy in 211 patients, whereas 61 patients underwent multiple sessions of lithotripsy. As for the 61 patients that underwent multiple sessions of mechanical lithotripsy, 6 (9.8%) had post-procedure cholangitis, 12 (19.6%) had pancreatitis, and 9 patients (14.7%) had delayed bleeding. Compared with the 211 patients undergoing a single session of mechanical lithotripsy, 3 (1.4%) had cholangitis, 1 (0.4%) had delayed bleeding, and 7 patients (3.3%) had pancreatitis. Statistical deviation was present in post-procedure cholangitis, delayed bleeding, and pancreatitis of both groups. CONCLUSION: Mechanical bile stone lithotripsy on difficult bile duct stones could produce around 90% successful rate. Moreover, complications are minimal. This finding further confirms the significance of mechanical lithotripsy in the treatment of patients with difficult bile duct stones.

Endoscopic management of difficult common bile duct stones:Where are we now?A comprehensive review

Endoscopic management for difficult common bile duct(CBD)stones still presents a challenge for several reasons,including anatomic anomalies,patients’individual conditions and stone features.In recent years,variable methods have emerged that have attributed to higher stone removal success rates,reduced cost and lower adverse events.In this review,we outline a stepwise approach in CBD stone management.As first line therapy,endoscopic sphincterotomy and large balloon dilation are recommended,due to a 30%-50%reduction of the use of mechanical lithotripsy.On the other hand,cholangioscopy-assisted lithotripsy has been increasingly reported as an effective and safe alternative technique to mechanical lithotripsy but remains to be reserved in special settings due to limited large-scale evidence.As discussed,findings suggest that management needs to be tailored to the patient’s characteristics and anatomical conditions.Furthermore,we evaluate the management of CBD stones in various surgical altered anatomy(Billroth II,Roux-en-Y and Roux-en-Y gastric bypass).Moreover,we could conclude that cholangioscopy-assisted lithotripsy needs to be evaluated for primary use,rather than following a failed management option.In addition,we discuss the importance of dissecting other techniques,such as the primary use of interventional endoscopic ultrasound for the management of CBD stones when other techniques have failed.In conclusion,we recognize that endoscopic sphincterotomy and large balloon dilation,mechanical lithotripsy and intraductal lithotripsy substantiate an indication to the management of difficult CBD stones,but emerging techniques are in rapid evolution with encouraging results.

Using cholecystokinin to facilitate endoscopic clearance of large common bile duct stones

AIM: To evaluate the effect of cholecystokinin (CCK) during extracorporeal shockwave lithotripsy (ESWL) in the clearance of common bile duct (CBD) stones in endoscopic retrograde cholangiopancreatography (ERCP).

Spontaneous passage of common bile duct stones in jaundiced patients

BACKGROUND:Common bile duct(CBD)stones are known to pass spontaneously in a significant number of patients. This study investigated the rate of spontaneous CBD stones passage in a series of patients presenting with jaundice due to gallstones.The patients were managed surgically,allowing CBD intervention to be avoided in the event of spontaneous passage of CBD stones. METHOD:Retrospective analysis of patients presenting with jaundice due to CBD stones,and managed surgically with laparoscopic cholecystectomy and intra-operative cholangiogram with or without CBD exploration. RESULTS:The jaundice settled pre-operatively in 76/108 patients, and in 60/108 the CBD stones had passed spontaneously by the time of surgery.These 60 patients avoided any intervention to their CBD. CONCLUSIONS:CBD stones pass spontaneously in more than half of jaundiced patients.Surgical management(laparoscopic cholecystectomy and intra-operative cholangiogram,with willingness to perform CBD exploration if positive)allows the avoidance of CBD intervention in these patients.

Poorly expandable common bile duct with stones on endoscopic retrograde cholangiography

AIM： To describe characteristics of a poorly expandable （PE） common bile duct （CBD） with stones on en- doscopic retrograde cholangiography.METHODS： APE bile duct was characterized by a rigid and relatively narrowed distal CBD with retro- grade dilatation of the non-PE segment. Between 2003 and 2006, endoscopic retrograde cholangiography （ERC） images and chart reviews of 1213 patients with newly diagnosed CBD stones were obtained from the computer database of Therapeutic Endoscopic Centerin Chang Gung Memoria acteristic PE bile duct on Hospital. Patients with char ERC were identified from the database. Data of the patients as well as the safety and technical success of therapeutic ERC were collected and analyzed retrospectively.RESULTS： A total of 30 patients with CBD stones and characteristic PE segments were enrolled in this study. The median patient age was 45 years （range, 20 to 92 years）; 66.7% of the patients were men. The di ameters of the widest non-PE CBD segment, the PE segment, and the largest stone were 14.3 ± 4.9 mm, 5.8±1.6 mm, and 11.2±4.7 mm, respectively. The length of the PE segment was 39.7±15.4 mm （range, 12.3 mm to 70.9 mm）. To remove the CBD stone（s） completely, mechanical lithotripsy was required in 25 （83.3%） patients even though the stone size was not as large as were the difficult stones that have been described in the literature. The stone size and stone/ PE segment diameter ratio were associated with the need for lithotripsy. Post-ERC complications occurred in 4 cases： pancreatitis in 1, cholangitis in 2, and an im- pacted Dormia basket with cholangitis in 1. Two （6.7%） of the 28 patients developed recurrent CBD stones at follow-up （50±14 mo） and were successfully managed with therapeutic ERC.CONCLUSION： Patients with a PE duct frequently require mechanical lithotripsy for stones extraction, To retrieve stones successfully and avoid complications, these patients should be identified during ERC,

Mechanical lithotripsy and/or stenting in management of difficult common bile duct stones

BACKGROUND:Mechanical lithotripsy and/or stent insertion is the alternative therapeutic approach in difficult endoscopic retrograde cholangiopancreatography (ERCP)case.This study was designed to investigate the appropriate treatment for extraction of bile duct stones in difficult cases of ERCP. METHODS:Between 2000 and 2008,744 ERCP procedures were performed in 592 patients with choledocholithiasis in our endoscopy unit.The demographic features,and clinical and laboratory findings were collected from a prospectively held database.Bile duct calculi were extracted by basket and/or balloon catheter following ERCP and sphincterotomy.Patients with retained stones were regarded as difficult cases.These patients were treated with mechanical lithotripsy and those with incomplete clearance of stones underwent stent placement. RESULTS:Two hundred and forty-five patients(41%) were male and 347(59%)were female with a mean age of 58 years(range 19-95 years).Stones were impacted in 27 patients(5%).Stone extraction was performed by basket and/or balloon catheter in 610 ERCP procedures,and lithotripsy was performed in 70 ERCP procedures.Forty- four patients underwent stent insertion,and 20 underwent stent replacement.Morbidity occurred in 39 patients (5%),with no mortality associated with the procedure.Hemorrhage occurred in 9 patients and basket impaction in 4.Mild pancreatitis and cholangitis developed in 12 and 11 patients,respectively. CONCLUSION:Difficult cases of bile duct stones can be treated successfully with lithotripsy,and a stent should be applied when the common bile duct cannot be cleared completely.

Complications of common bile duct stones: A risk factors analysis

Background: The latest guidelines recommended that common bile duct stones(CBDSs) should be removed, preferably endoscopically, regardless of the presence of symptoms or complications. However, the removal of CBDSs may not be feasible in very old patients or those with co-morbidities. In these cases, it is important to understand the risk factors for the development of CBDSs-related complications to decide whether or not to treat high-risk patients. Herein, we aimed to identify the risk factors for the development of complications after the diagnosis of CBDSs. Methods: The medical records of patients with CBDSs between October 2005 and September 2019 were retrospectively analyzed. All patients with radiologically-diagnosed CBDSs, including those who received treatment and those who did not, were analyzed. Results: A total of 634 patients were included and 95(15.0%) patients had CBDS-related complications during the mean follow-up period of 32.6 months. Forty-four(6.9%) high-risk patients remained asymptomatic and did not receive treatment during the follow-up period. In multivariate analyses, size of CBDSs ≥ 5 mm and no treatment within 30 days were independent risk factors for the development of complications. The spontaneous passage of CBDSs was proved radiologically in 9 out of 81(11.1%) patients within 30 days. Conclusions: It is recommended treating CBDSs within 30 days from the diagnosis, even in high-risk patients, especially if the size is larger than 5 mm.

Possible relationship between cholecystectomy and subsequent occurrence of primary common bile duct stones:a retrospective review of data

BACKGROUND: Most reports on the prognosis of cholecystectomy have been short-term studied, and few long-term reports have suggested variable incidences of common bile duct stones after cholecystectomy. We retrospectively reviewed the data to find the possible association between cholecystectomy and the subsequent occurrence of primary common bile duct stones. METHODS: The data were reviewed retrospectively of 478 patients with primary common bile duct stones diagnosed and treated by endoscopic sphincterotomy at our hospitals between January 1994 and December 2003. RESULTS: Sixty-one (14.1%) of the 432 patients had a history of cholecystectomy, with an incidence rate markedly higher than that in the general population. The mean interval between cholecystectomy and the occurrence of primary common bile duct stones was 8.23 years, with the longest being 28 years and the shortest 2 years. Compared with the patients who had not undergone a prior cholecystectomy, those who had had a prior cholecystectomy more often accompanied with acute cholangiolitis (chi(2)=8.259, P<0.01), and multiple stones or sand-like stones were frequently found (chi(2)= 9.030, P<0.01). CONCLUSIONS: These results suggest a possible relationship between cholecystectomy and the subsequent occurrence of primary common bile duct stones. Perhaps patients with primary common bile duct stones who have had a prior cholecystectomy have a higher probability of infection of the biliary system. The infection may be one of the causes of occurrence of primary common bile duct stones after cholecystectomy.

Remaining issues of recommended management in current guidelines for asymptomatic common bile duct stones

Current guidelines for treating asymptomatic common bile duct stones(CBDS)recommend stone removal,with endoscopic retrograde cholangiopan-creatography(ERCP)being the first treatment choice.When deciding on ERCP treatment for asymptomatic CBDS,the risk of ERCP-related complications and outcome of natural history of asymptomatic CBDS should be compared.The incidence rate of ERCP-related complications,particularly of post-ERCP pancreatitis for asymptomatic CBDS,was reportedly higher than that of symptomatic CBDS,increasing the risk of ERCP-related complications for asymptomatic CBDS compared with that previously reported for biliopancreatic diseases.Although studies have reported short-to middle-term outcomes of natural history of asymptomatic CBDS,its long-term natural history is not well known.Till date,there are no prospective studies that determined whether ERCP has a better outcome than no treatment in patients with asymptomatic CBDS or not.No randomized controlled trial has evaluated the risk of early and late ERCP-related complications vs the risk of biliary complications in the wait-and-see approach,suggesting that a change is needed in our perspective on endoscopic treatment for asymptomatic CBDS.Further studies examining long-term complication risks of ERCP and wait-and-see groups for asymptomatic CBDS are warranted to discuss whether routine endoscopic treatment for asymptomatic CBDS is justified or not.

Could saline irrigation clear all residual common bile duct stones after lithotripsy?A self-controlled prospective cohort study

BACKGROUND A previous study showed that irrigation with 100 mL saline reduced residual common bile duct(CBD)stones,which potentially cause recurrent stones after endoscopic retrograde cholangiopancreatography.AIM To determine whether saline irrigation can improve CBD clearance after lithotripsy.METHODS This prospective self-controlled study enrolled patients receiving mechanical lithotripsy for large(>1.2 cm)CBD stones.After occlusion cholangiography confirmed CBD stone clearance,peroral cholangioscopy(POC)was performed to determine clearance scores based on the number of residual stones.The amounts of residual stones spotted via POC were graded on a 5-point scale(score 1,worst;score 5,best).Scores were documented after only stone removal(control)and after irrigation with 50 mL and 100 mL saline,respectively.The stone composition was analyzed using infrared spectroscopy.RESULTS Between October 2018 and January 2020,47 patients had CBD clearance scores of 2.4±1.1 without saline irrigation,3.5±0.7 with 50 mL irrigation,and 4.6±0.6 with 100 mL irrigation(P<0.001).Multivariate analysis showed that CBD diameter>15 mm[odds ratio(OR)=0.08,95%confidence interval(CI):0.01-0.49;P=0.007]and periampullary diverticula(PAD)(OR=6.51,95%CI:1.08-39.21;P=0.041)were independent risk factors for residual stones.Bilirubin pigment stones constituted the main residual stones found in patients with PAD(P=0.004).CONCLUSION Irrigation with 100 mL of saline may not clear all residual CBD stones after lithotripsy,especially in patients with PAD and/or a dilated(>15 mm)CBD.Pigment residual stones are soft and commonly found in patients with PAD.Additional saline irrigation may be required to remove retained stones.