Prevalence of gallstone disease in a Swedish population

Natural history of asymptomatic gallbladder stones in clinic without beds: A long-term prognosis over 10 years

BACKGROUND

Several studies have explored the long-term prognosis of patients with asymptomatic gallbladder stones. These reports were primarily conducted in facilities equipped with beds for addressing symptomatic cases.

AIM

To report the long-term prognosis of patients with asymptomatic gallbladder stones in clinics without bed facilities.

METHODS

We investigated the prognoses of 237 patients diagnosed with asymptomatic gallbladder stones in clinics without beds between March 2010 and October 2022. When symptoms developed, patients were transferred to hospitals where appropriate treatment was possible. We investigated the asymptomatic and survival periods during the follow-up.

RESULTS

Among the 237 patients, 214 (90.3%) remained asymptomatic, with a mean asymptomatic period of 3898.9279 ± 46.871 d (50-4111 d, 10.7 years on average). Biliary complications developed in 23 patients (9.7%), with a mean survival period of 4010.0285 ± 31.2788 d (53-4112 d, 10.9 years on average). No patient died of biliary complications.

CONCLUSION

The long-term prognosis of asymptomatic gallbladder stones in clinics without beds was favorable. When the condition became symptomatic, the patients were transferred to hospitals with beds that could address it; thus, no deaths related to biliary complications were reported. This finding suggests that follow-up care in clinics without beds is possible.

Global Variations in Practices Concerning Roux-en-Y Gastric Bypass-an Online Survey of 651 Bariatric and Metabolic Surgeons with Cumulative Experience of 158,335 Procedures

INTRODUCTION

There is significant variation in practices concerning Roux-en-Y gastric bypass (RYGB) among bariatric surgeons, but there is currently a lack of robust data on the nature and extent of these variations. The purpose of this study was to understand global variations in practices concerning RYGB.

METHODS

A questionnaire-based survey on Survey Monkey® was created, and the link was shared freely on various social media platforms. The link was also distributed through a personnel email network of authors.

RESULTS

A total of 657 surgeons from 65 countries completed the survey. Crohn's disease and liver cirrhosis were considered absolute contraindications for RYGB by 427 surgeons (64.98%) and 347 surgeons (53.30%), respectively. More than 68.5% of surgeons performed routine upper GI endoscopy while 64.17% performed routine ultrasound of abdomen preoperatively. The majority of surgeons (77.70%) used the perigastric technique for Gastric pouch creation. Approximately, 79.5% used orogastric bougie. More than 70% of the respondents did not use any staple line reinforcement routinely. Only 17.67% of surgeons measured the whole small bowel length, and the majority of surgeons (86.5%) used constant length of BP limb. Approximately, 89% used constant length of alimentary limb. Approximately, 95% of surgeons preferred antecolic bypass, and more than 86% routinely closed the Petersen defect. Marginal ulcer prophylaxis was used by the majority (91.17%). Almost 95% of surgeons recommended lifelong vitamin and mineral supplements.

CONCLUSION

This survey identifies global variations in practices concerning RYGB. It identifies several areas for future research and consensus building.

Emergency presentations of acute biliary pain: changing patterns of management in a tertiary institute

BACKGROUND

Acute biliary pain is the most common presentation of gallstone disease. Untreated patients risk recurrent pain, cholecystitis, obstructive jaundice, pancreatitis and multiple hospital presentations. We examine the outcome of implementing a policy to offer laparoscopic cholecystectomy on index presentation to patients with biliary colic in a tertiary hospital in Australia.

METHODS

This is a retrospective cohort study of adult patients presenting to the emergency department (ED) with biliary pain during three 12-month periods. Outcomes in Group A, 3 years prior to policy implementation, were compared with groups 2 and 7 years post implementation (Groups B and C). Primary outcomes were representations to ED, admission rate and time to cholecystectomy.

RESULTS

A total of 584 patients presented with biliary colic during the three study periods. Of these, 391 underwent cholecystectomy with three Strasberg Type A bile leaks and no bile duct injuries. The policy increased admission rates (A = 15.8%, B = 62.9%, C = 29.5%, P < 0.001) and surgery on index presentation (A = 12.0%, B = 60.7%, C = 27.4%, P < 0.001). There was a decline in time to cholecystectomy (days) (A = 143, B = 15, C = 31, P < 0.001), post-operative length of stay (days) (A = 3.6, B = 3.2, C = 2.0, P < 0.05) and representation rates to ED (A = 42.1%, B = 7.1%, C = 19.9%, P < 0.001). There was a decline in policy adherence in the later cohort.

CONCLUSION

Index hospital admission and cholecystectomy for biliary colic decrease patient representations, time to surgery, post-operative stay and complications of gallstone disease. This study demonstrates the impact of the policy with initial improvement, the dangers of policy attrition and the need for continued reinforcement.

Prevalence of Non-insulin-dependent Diabetes Mellitus Among Patients with Cholelithiasis: A Single-centered, Cross-sectional Study

Introduction Gallstone disease (GD) is one of the major causes of morbidity and mortality in the west and most of the countries worldwide. Cholelithiasis and diseases of the biliary tract are becoming more prevalent with the socioeconomic burden in developing countries like Pakistan. GD is a chronic, recurrent hepatobiliary disease, the basis of which is the impaired metabolism of cholesterol, bilirubin, and bile acids, which is characterized by the formation of gallstones in the hepatic bile duct, common bile duct, or gallbladder. Epidemiologic studies have shown that individuals with diabetes have a higher risk of cholelithiasis but only a few studies have been done in Pakistan to establish the association so far. Hence, the aim of the present study is to establish the association between diabetes and gallstone disease. Methods A cross-sectional study was conducted at Liaquat University Civil Hospital, Hyderabad, Pakistan, between February 2017 and August 2017. Patients between the ages of 10 and 70 from either sex, who were diagnosed with cholelithiasis were included in this study whereas those patients who underwent cholecystectomy previously were excluded. Diabetic cases were identified based on fasting glucose levels (FGL) and the serum levels of HbA1c. An interview-based questionnaire was employed to collect the patient's demographic profile and risk factors by the students. Informed consent was taken from all the study subjects and the confidentiality of the data was ensured. Results From the sample size of patients evaluated (a total of 204), based on investigative studies performed, 74 cholelithiatic patients (36.6%) were found to concurrently have diabetes as well. Among the 74 patients with both cholelithiasis and diabetes type-2 (NIDDM), 56 were female and 18 were males. The rest of the patients with cholelithiasis were found to be non-diabetic (78 were males and 52 female). The majority of the GD patients (51 (25 males and 26 females)) in the study sample was in the 50-60 age group. The mean age of the patients was 43 ± 12.1. In this study, we measured the fasting glucose levels (FGL). According to World Health Organization (WHO) and American Diabetes Association (ADA) criteria, we categorized 85 of the GD patients to be non-diabetic with serum fasting glucose levels between 70 and 100 gm/dL, and 45 patients were categorized to be in the pre-diabetic group with FGL levels between 100 and 126. Out of the 204 samples with GD, we found that 74 patients have diabetes, with serum FGL >126mg/dL. We measured HbA1c from each individual in the study sample. It was found that 79 patients had HbA1c levels <5.5, they are categorised as non-diabetic according to WHO and ADA criteria, 51 patients had values between 5.5 and 6.5 (pre-diabetic), and 35 GD patients had HbA1c values between 6.5 and 7.5 (categorized as diabetics with good control) and 39 patients with HbA1c above 7.5 (diabetes with poor control). Conclusion In this study, we concluded that there is a higher prevalence of NIDDM in GD patients and there is an association between GD and NIDDM. This study also reiterated the association between obesity and GD. Female sex and advancing age also contribute to the formation of cholelethiasis. Cigarette smoking and alcohol consumption further worsen cholelithiasis but are not established primary risk factors.

Gallstone prevalence and risk factors in patients with ulcerative colitis in Korean population

This study aims to evaluate the prevalence, risk factors, and relative risk of gallstones and associated disease in patients with ulcerative colitis (UC). Medical records of 311 patients diagnosed with UC between January 2004 and February 2015 were reviewed retrospectively. To assess relative risk, 622 patients matched by age, sex, and body mass index were included as a control group. Gallstones were detected in 8% (25/311) of UC patients and in 3.9% (24/622) of the control group. Prevalence was significantly higher in the UC group (odds ratio [OR], 2.178; P = .007). Mean age of gallstone patients was 57.1 ± 17.8 years in the UC group, and mean disease duration of UC was 67.2 ± 38.8 months. The male-to-female ratio of gallstone patients in the UC group was 2.13:1. Mean interval from diagnosis of UC to detection of gallstones was 17.8 ± 30 months. Six UC patients with gallstones underwent cholecystectomy or endoscopic retrograde cholangiography for symptomatic disease and complications. In univariate analysis, diabetes, hypertension, age ≥65 years, and history of more than 3 admissions were significantly associated with gallstone in UC patients. In multivariate analysis, age ≥65 years (OR, 2.655; P = .033) and hospitalization ≥3 times (OR, 4.1; P = .001) were statistically significant risk factors for gallstones in UC patients. This study shows that UC patients have a significantly higher risk of gallstones compared to the general population (OR, 2.178; P = .007), especially those who are older, with a history of multiple admissions.

Regional variations in cholecystectomy rates in Sweden: impact on complications of gallstone disease

OBJECTIVE

There are considerable variations in cholecystectomy rates between countries, but it remains unsettled whether high cholecystectomy rates prevent future gallstone complications by reducing the gallstone prevalence. The aims of this study were to investigate the regional differences in cholecystectomy rates and their relation to the incidence of gallstone complications.

MATERIAL AND METHODS

Nation-wide registry-based study of the total number of cholecystectomies in Sweden between 1998 and 2013. Data were obtained from the Swedish Inpatient Registry covering the entire population and subdivided for by the 21 different counties. Indications for the procedure were prospectively collected during the years 2006-2013 in the National Registry for Gallstone Surgery and ERCP. The detailed demography of the total number of patients undergoing cholecystectomy and its relation to the respective indications were analysed by linear regression.

RESULTS

The annual rates of cholecystectomy in the Swedish counties ranged from 100 to 207 per 100,000 inhabitants, with a mean of 157 (95% CI 145-169). The majority of cholecystectomies were done in females based on the indication biliary colic, with a peak incidence in younger ages. Cholecystectomies performed due to gallstone complications, pancreatitis and cholecystitis, were mainly carried out in the older age groups. No significant relationship could be demonstrated between cholecystectomy rates in the different regions and the respective incidences of gallstone complications.

CONCLUSIONS

There are wide regional variations in cholecystectomy rates in Sweden. The present study does not give support that frequent use of cholecystectomy in uncomplicated gallstone disease prevents future gallstone complications.

Phase composition and morphological analysis of human gallstones using IR spectroscopy, scanning electron microscopy and X-ray Rietveld analysis

Quantitative phase composition and morphological characterization of 12 human gallbladder stones (GS1–GS12) retrieved from patients of eastern India have been carried out using IR-spectroscopy, powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM). The FTIR spectra indicated that the primary composition of gallstones studied was cholesterol. X-ray powder diffraction study revealed cholesterol monohydrate (CHM) as the major crystalline phase in GS1–GS12. The Rietveld analysis showed that nine of the gallstones were composed exclusively of CHM, while the remaining three stones contained in addition to CHM, small amounts (4.2–10.6 wt%) of calcium carbonate as aragonite and vaterite. The crystallite size of CHM in GS1–GS12 varied between 82(6) and 249(3) nm. The SEM images of gallstones showed different crystal habits of CHM such as plates, thin rods, rectangular and hexagonal blocks, which resulted into different levels of agglomeration at the mesoscopic scale. Presence of numerous parasitic eggs with a typical muskmelon surface in three gallstones (GS2, GS7 and GS9) suggests possible association between the liver fluke infection and biliary stone formation in these patients. To the best of our knowledge, the study constitutes the first report of X-ray quantitative phase analysis of gallstones using the Rietveld methodology.

C-reactive protein has a better discriminative power than white cell count in the diagnosis of acute cholecystitis

BACKGROUND

The diagnosis of acute cholecystitis (AC) is challenging and may result in a delay in surgery, hospital discharge, and increased mortality. To improve its diagnosis, C-reactive protein (CRP) has been proposed as a benchmark. The aim of this study was to evaluate discriminative power of CRP against white cell count (WCC) in AC.

METHODS

This was a retrospective cohort study. Over a 5-y period, 1959 patients were identified from the audit of cholecystectomies. The exclusion criteria were coexisting acute surgical conditions, absence of blood tests within 3 d before hospital admission for elective surgery, and private patients.

RESULTS

The eligibility criteria were met by 1843 patients. Comparison of the area under receiver operating characteristic (AUC) curve of CRP and WCC in acute on chronic, edematous, necrotic, suppurative, and gangrenous AC showed a better discriminative power of CRP. Both tests performed equally well in patients with pericholecystic abscess and gallbladder perforation. CRP was superior than WCC in mild AC, AUC = 0.93 (95% confidence interval [CI], 0.9-0.95) and 0.79 (95% CI, 0.74-0.84), P < 0.00005, in moderate and severe AC, AUC = 0.99 (95% CI, 0.97-1.0) and 0.92 (95% CI, 0.88-0.97), P = 0.009, and in all forms of AC combined, AUC = 0.94; (95% CI, 0.92-0.97) and 0.83 (95% CI, 0.79-0.87), respectively, P < 0.00005.

CONCLUSIONS

CRP has a better discriminative power than WCC in most forms of AC and is a useful diagnostic marker of AC.

Prevalence and Risk Factors of Asymptomatic Gallstone Disease in North-East Part of Bangladesh

Background

The study was designed to assess the prevalence of asymptomatic gallstone disease in North-East part of Bangladesh.

Materials and methods

Randomly selected asymptomatic persons, unknown to have gallstone disease, from both rural and urban areas were enrolled. They were subjected to abdominal ultrasonography and findings were recorded in a data sheet.

Results

Total 1,019 persons (316 males and 703 females) were examined. Age of them varied from 18 to 80 years with mean age of 37.22 years. Out of them, 61 (6%) persons were found to have gallstone. Among them, 14 were males and 47 were females. Both male and females of age below 40 years were more affected. Gallstone disease was found more commonly among housewives and middle class people. Among 61 patients with gallstone, seven were underweight (11.47%), 32 (52.45%) had normal weight and 22 (36.06%) were overweight, obese or extremely obese. But, this difference was not statistically significant (p = 0.894).

Conclusion

Prevalence of asymptomatic gallstone disease was found in 6% apparently healthy subjects of North-East part of Bangladesh. It was more prevalent among housewives and middle class group of population. It is also common among the people of age group below 40 years.

How to cite this article

Saha M, Nahar K, Hosen MMA, Khan MH, Saha SK, Shil BC, Rahman MH. Prevalence and Risk Factors of Asymptomatic Gallstone Disease in North-East Part of Bangladesh. Euroasian J Hepato-Gastroenterol 2015;5(1):1-3.

Fewer-than-four ports versus four ports for laparoscopic cholecystectomy

BACKGROUND

Traditionally, laparoscopic cholecystectomy is performed using two 10-mm ports and two 5-mm ports. Recently, a reduction in the number of ports has been suggested as a modification of the standard technique with a view to decreasing pain and improving cosmesis. The safety and effectiveness of using fewer-than-four ports has not yet been established.

OBJECTIVES

To assess the benefits (such as improvement in cosmesis and earlier return to activity) and harms (such as increased complications) of using fewer-than-four ports (fewer-than-four-ports laparoscopic cholecystectomy) versus four ports in people undergoing laparoscopic cholecystectomy for any reason (symptomatic gallstones, acalculous cholecystitis, gallbladder polyp, or any other condition).

SEARCH METHODS

We searched the Cochrane Central Register of Controlled Trials (CENTRAL; Issue 8, 2013), MEDLINE, EMBASE, Science Citation Index Expanded, and the World Health Organization International Clinical Trials Registry Platform portal to September 2013.

SELECTION CRITERIA

We included all randomised clinical trials comparing fewer-than-four ports versus four ports, that is, with standard laparoscopic cholecystectomy that is performed with two ports of at least 10-mm incision and two ports of at least 5-mm incision.

DATA COLLECTION AND ANALYSIS

Two review authors independently identified the trials and extracted the data. We analysed the data using both the fixed-effect and the random-effects models. For each outcome, we calculated the risk ratio (RR) or mean difference (MD) with 95% confidence intervals (CI) based on intention-to-treat analysis, whenever possible.

MAIN RESULTS

We found nine trials with 855 participants that randomised participants to fewer-than-four-ports laparoscopic cholecystectomy (n = 427) versus four-port laparoscopic cholecystectomy (n = 428). Most trials included low anaesthetic risk participants undergoing elective laparoscopic cholecystectomy. Seven of the nine trials used a single port laparoscopic cholecystectomy and the remaining two trials used three-port laparoscopic cholecystectomy as the experimental intervention. Only one trial including 70 participants had low risk of bias. Fewer-than-four-ports laparoscopic cholecystectomy could be completed successfully in more than 90% of participants in most trials. The remaining participants were mostly converted to four-port laparoscopic cholecystectomy but some participants had to undergo open cholecystectomy.There was no mortality in either group in the seven trials that reported mortality (318 participants in fewer-than-four-ports laparoscopic cholecystectomy group and 316 participants in four-port laparoscopic cholecystectomy group). The proportion of participants with serious adverse events was low in both treatment groups and the estimated RR was compatible with a reduction and substantial increased risk with the fewer-than-four-ports group (6/318 (1.9%)) and four-port laparoscopic cholecystectomy group (0/316 (0%)) (RR 3.93; 95% CI 0.86 to 18.04; 7 trials; 634 participants; very low quality evidence). The estimated difference in the quality of life (measured between 10 and 30 days) was imprecise (standardised mean difference (SMD) 0.18; 95% CI -0.05 to 0.42; 4 trials; 510 participants; very low quality evidence), as was the proportion of participants in whom the laparoscopic cholecystectomy had to be converted to open cholecystectomy between the groups (fewer-than-four ports 3/289 (adjusted proportion 1.2%) versus four port: 5/292 (1.7%); RR 0.68; 95% CI 0.19 to 2.35; 5 trials; 581 participants; very low quality evidence). The fewer-than-four-ports laparoscopic cholecystectomy took 14 minutes longer to complete (MD 14.44 minutes; 95% CI 5.95 to 22.93; 9 trials; 855 participants; very low quality evidence). There was no clear difference in hospital stay between the groups (MD -0.01 days; 95% CI -0.28 to 0.26; 6 trials; 731 participants) or in the proportion of participants discharged as day surgery (RR 0.92; 95% CI 0.70 to 1.22; 1 trial; 50 participants; very low quality evidence) between the two groups. The times taken to return to normal activity and work were shorter by two days in the fewer-than-four-ports group compared with four-port laparoscopic cholecystectomy (return to normal activity: MD -1.20 days; 95% CI -1.58 to -0.81; 2 trials; 325 participants; very low quality evidence; return to work: MD -2.00 days; 95% CI -3.31 to -0.69; 1 trial; 150 participants; very low quality evidence). There was no significant difference in cosmesis scores at 6 to 12 months between the two groups (SMD 0.37; 95% CI -0.10 to 0.84; 2 trials; 317 participants; very low quality evidence).

AUTHORS' CONCLUSIONS

There is very low quality evidence that is insufficient to determine whether there is any significant clinical benefit in using fewer-than-four-ports laparoscopic cholecystectomy compared with four-port laparoscopic cholecystectomy. The safety profile of using fewer-than-four ports is yet to be established and fewer-than-four-ports laparoscopic cholecystectomy should be reserved for well-designed randomised clinical trials.

Trends in cholecystectomy rates in a defined population during and after the period of transition from open to laparoscopic surgery

OBJECTIVE

To evaluate cholecystectomy rates in a Norwegian county during the transition time from open to laparoscopic surgery, with focus on the incident rate of laparoscopic operations, sex differences, age at operation, and indications for cholecystectomy.

MATERIAL AND METHODS

All 2615 patients living in North Trondelag County and operated with cholecystectomy for benign biliary disease between 1990 and 2011 were identified. Poisson regression was used to analyze factors associated with cholecystectomy incidence rate ratios (IRRs).

RESULTS

The proportion of completed laparoscopic cholecystectomies was 8% in 1992, 50% in 1994, 94% in 2003 and 99% in 2011. The incidence of cholecystectomy increased from 6.2 per 10 000 person-years in 1990-1992, 8.0 in 1993-1997, to 10.0 in 1998-2003 and remained at this level with a rate of 10.7 during 2004-2011. Adjusting for age at each year of surgery the IRR for females compared with males was 2.3(2.1-2.5) p < 0.001. The median age at operation was 60.2 years (13-90) in males, 50.1 years (12-93) in females p < 0.001. The median age diminished by 5 years in both males and females. A conversion from laparoscopic to open surgery decreased significantly by calendar year of surgery, increased with age of the patient, and was less often in surgery for gallstone colic than for other indications.

CONCLUSIONS

During the introduction of laparoscopic surgery, the rates of cholecystectomy increased and remained stable at a higher level during the later years of the study. The rate of completed laparoscopic operations increased from 8% in 1992 to 99% in 2011.

Concomitant cholecystectomy during laparoscopic Roux-en-Y gastric bypass in obese patients is not justified: a meta-analysis

While LRYGB has become a cornerstone in the surgical treatment of morbidly obese patients, concomitant cholecystectomy during LRYGB remains a matter of debate. The aim of this meta-analysis was to estimate the rate and morbidity of subsequent cholecystectomy after laparoscopic Roux-en-Y gastric bypass (LRYGB) in obese patients. A meta-analysis was performed analyzing the rate and morbidity of subsequent cholecystectomy in patients who underwent LRYGB without concomitant cholecystectomy. Thirteen studies met the inclusion criteria. The rate of subsequent cholecystectomy was 6.8 % (95 % CI, 5.0-8.7 %) based on 6,048 obese patients who underwent LRYGB without concomitant cholecystectomy. The rate of subsequent cholecystectomy due to biliary colic or gallbladder dyskinesia was 5.3 %; due to cholecystitis, 1.0 %; choledocholithiasis, 0.2 %; and biliary pancreatitis, 0.2 %. The mortality after subsequent cholecystectomy was 0 % (95 % CI, 0-0.1 %). The surgery-related complication rate after subsequent cholecystectomy was 1.8 % (95 % CI, 0.7-3.4 %) resulting in a risk of 0.1 % (95 % CI, 0.03-0.3 %) to suffer from a cholecystectomy-related complication in patients undergoing LRYGB without concomitant cholecystectomy. A prophylactic concomitant cholecystectomy during LRYGB should be avoided in patients without cholelithiasis and exclusively be performed in patients with symptomatic biliary disease.

Abdominal lift for laparoscopic cholecystectomy

BACKGROUND

Laparoscopic cholecystectomy (key-hole removal of the gallbladder) is now the most often used method for treatment of symptomatic gallstones. Several cardiopulmonary changes (decreased cardiac output, pulmonary compliance, and increased peak airway pressure) occur during pneumoperitoneum, which is now introduced to allow laparoscopic cholecystectomy. These cardiopulmonary changes may not be tolerated in individuals with poor cardiopulmonary reserve.

OBJECTIVES

To assess the benefits and harms of abdominal wall lift compared to pneumoperitoneum in patients undergoing laparoscopic cholecystectomy.

SEARCH METHODS

We searched the Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until February 2013.

SELECTION CRITERIA

We included all randomised clinical trials comparing abdominal wall lift (with or without pneumoperitoneum) versus pneumoperitoneum.

DATA COLLECTION AND ANALYSIS

We calculated the risk ratio (RR), rate ratio (RaR), or mean difference (MD) with 95% confidence intervals (CI) based on intention-to-treat analysis with both the fixed-effect and the random-effects models using the Review Manager (RevMan) software.

MAIN RESULTS

For abdominal wall lift with pneumoperitoneum versus pneumoperitoneum, a total of 130 participants (all with low anaesthetic risk) scheduled for elective laparoscopic cholecystectomy were randomised in five trials to abdominal wall lift with pneumoperitoneum (n = 53) versus pneumoperitoneum only (n = 52). One trial which included 25 people did not state the number of participants in each group. All five trials had a high risk of bias. There was no mortality or conversion to open cholecystectomy in any of the participants in the trials that reported these outcomes. There was no significant difference in the rate of serious adverse events between the two groups (two trials; 2/29 events (0.069 events per person) versus 2/29 events (0.069 events per person); rate ratio 1.00; 95% CI 0.17 to 5.77). None of the trials reported quality of life, the proportion of people discharged as day-patient laparoscopic cholecystectomies, or pain between four and eight hours after the operation. There was no significant difference in the operating time between the two groups (four trials; 53 participants versus 54 participants; 13.39 minutes longer (95% CI 2.73 less to 29.51 minutes longer) in the abdominal wall lift with pneumoperitoneum group and 100 minutes in the pneumoperitoneum group).For abdominal wall lift versus pneumoperitoneum, a total of 774 participants (the majority with low anaesthetic risk) scheduled for elective laparoscopic cholecystectomy were randomised in 18 trials to abdominal wall lift without pneumoperitoneum (n = 332) versus pneumoperitoneum (n = 358). One trial which included 84 people did not state the number in each group. All the trials had a high risk of bias. There was no mortality in any of the trials that reported this outcome. There was no significant difference in the proportion of participants with serious adverse events (six trials; 5/172 (weighted proportion 2.4%) versus 2/171 (1.2%); RR 2.01; 95% CI 0.52 to 7.80). There was no significant difference in the rate of serious adverse events between the two groups (three trials; 5/99 events (weighted number of events per person = 0.346 events) versus 2/99 events (0.020 events per person); rate ratio 1.73; 95% CI 0.35 to 8.61). None of the trials reported quality of life or pain between four and eight hours after the operation. There was no significant difference in the proportion of people who underwent conversion to open cholecystectomy (11 trials; 5/225 (weighted proportion 2.3%) versus 7/235 (3.0%); RR 0.76; 95% CI 0.26 to 2.21). The operating time was significantly longer in the abdominal wall lift group than in the pneumoperitoneum group (16 trials; 6.87 minutes longer (95% CI 4.74 minutes to 9.00 minutes longer) in the abdominal wall lift group versus 75 minutes in the pneumoperitoneum group). There was no significant difference in the proportion of people discharged as laparoscopic cholecystectomy day-patients (two trials; 15/31 (weighted proportion 48.5%) versus 9/31 (29%); RR 1.67; 95% CI 0.85 to 3.26).

AUTHORS' CONCLUSIONS

Abdominal wall lift with or without pneumoperitoneum does not seem to offer an advantage over pneumoperitoneum in any of the patient-oriented outcomes for laparoscopic cholecystectomy in people with low anaesthetic risk. Hence it cannot be recommended routinely. The safety of abdominal wall lift is yet to be established. More research on the topic is needed because of the risk of bias in the included trials and because of the risk of type I and type II random errors due to the few participants included in the trials. Future trials should include people at higher anaesthetic risk. Furthermore, such trials should include blinded assessment of outcomes.

Miniports versus standard ports for laparoscopic cholecystectomy

BACKGROUND

In conventional (standard) port laparoscopic cholecystectomy, four abdominal ports (two of 10 mm diameter and two of 5 mm diameter) are used. Recently, use of smaller ports, miniports, have been reported.

OBJECTIVES

To assess the benefits and harms of miniport (defined as ports smaller than the standard ports) laparoscopic cholecystectomy versus standard port laparoscopic cholecystectomy.

SEARCH METHODS

We searched the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until February 2013 to identify randomised clinical trials of relevance to this review.

SELECTION CRITERIA

Only randomised clinical trials (irrespective of language, blinding, or publication status) comparing miniport versus standard port laparoscopic cholecystectomy were considered for the review.

DATA COLLECTION AND ANALYSIS

Two review authors collected the data independently. We analysed the data with both fixed-effect and random-effects models using RevMan analysis. For each outcome we calculated the risk ratio (RR), mean difference (MD), or standardised mean difference (SMD) with 95% confidence intervals (CI).

MAIN RESULTS

We included 12 trials with 734 patients randomised to miniport laparoscopic cholecystectomy (380 patients) versus standard laparoscopic cholecystectomy (351 patients). Only one trial which included 70 patients was of low risk of bias. Miniport laparoscopic cholecystectomy could be completed successfully in more than 80% of patients in most trials. The remaining patients were mostly converted to standard port laparoscopic cholecystectomy but some were also converted to open cholecystectomy. These patients were included for the outcome conversion to open cholecystectomy but excluded from other outcomes. Accordingly, the results of the other outcomes are on 343 patients in the miniport laparoscopic cholecystectomy group and 351 patients in the standard port laparoscopic cholecystectomy group, and therefore the results have to be interpreted with extreme caution.There was no mortality in the seven trials that reported mortality (0/194 patients in miniport laparoscopic cholecystectomy versus 0/203 patients in standard port laparoscopic cholecystectomy). There were no significant differences between miniport laparoscopic cholecystectomy and standard laparoscopic cholecystectomy in the proportion of patients who developed serious adverse events (eight trials; 460 patients; RR 0.33; 95% CI 0.04 to 3.08) (miniport laparoscopic cholecystectomy: 1/226 (adjusted proportion 0.4%) versus standard laparoscopic cholecystectomy: 3/234 (1.3%); quality of life at 10 days after surgery (one trial; 70 patients; SMD -0.20; 95% CI -0.68 to 0.27); or in whom the laparoscopic operation had to be converted to open cholecystectomy (11 trials; 670 patients; RR 1.23; 95% CI 0.44 to 3.45) (miniport laparoscopic cholecystectomy: 8/351 (adjusted proportion 2.3%) versus standard laparoscopic cholecystectomy 6/319 (1.9%)). Miniport laparoscopic cholecystectomy took five minutes longer to complete than standard laparoscopic cholecystectomy (12 trials; 695 patients; MD 4.91 minutes; 95% CI 2.38 to 7.44). There were no significant differences between miniport laparoscopic cholecystectomy and standard laparoscopic cholecystectomy in the length of hospital stay (six trials; 351 patients; MD -0.00 days; 95% CI -0.12 to 0.11); the time taken to return to activity (one trial; 52 patients; MD 0.00 days; 95% CI -0.31 to 0.31); or in the time taken for the patient to return to work (two trials; 187 patients; MD 0.28 days; 95% CI -0.44 to 0.99) between the groups. There was no significant difference in the cosmesis scores at six months to 12 months after surgery between the two groups (two trials; 152 patients; SMD 0.13; 95% CI -0.19 to 0.46).

AUTHORS' CONCLUSIONS

Miniport laparoscopic cholecystectomy can be completed successfully in more than 80% of patients. There appears to be no advantage of miniport laparoscopic cholecystectomy in terms of decreasing mortality, morbidity, hospital stay, return to activity, return to work, or improving cosmesis. On the other hand, there is a modest increase in operating time after miniport laparoscopic cholecystectomy compared with standard port laparoscopic cholecystectomy and the safety of miniport laparoscopic cholecystectomy is yet to be established. Miniport laparoscopic cholecystectomy cannot be recommended routinely outside well-designed randomised clinical trials. Further trials of low risks of bias and low risks of random errors are necessary.

Day-surgery versus overnight stay surgery for laparoscopic cholecystectomy

BACKGROUND

Laparoscopic cholecystectomy is used to manage symptomatic gallstones. There is considerable controversy regarding whether it should be done as day-surgery or as an overnight stay surgery with regards to patient safety.

OBJECTIVES

To assess the impact of day-surgery versus overnight stay laparoscopic cholecystectomy on patient-oriented outcomes such as mortality, severe adverse events, and quality of life.

SEARCH METHODS

We searched the Cochrane Hepato-Biliary Group Controlled Trials Register and the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, Science Citation Index Expanded, and mRCT until September 2012.

SELECTION CRITERIA

We included randomised clinical trials comparing day-surgery versus overnight stay surgery for laparoscopic cholecystectomy, irrespective of language or publication status.

DATA COLLECTION AND ANALYSIS

Two authors independently assessed trials for inclusion and independently extracted the data. We analysed the data with both the fixed-effect and the random-effects models using Review Manager 5 analysis. We calculated the risk ratio (RR), mean difference (MD), or standardised mean difference (SMD) with 95% confidence intervals (CI) based on intention-to-treat or available case analysis.

MAIN RESULTS

We identified a total of six trials at high risk of bias involving 492 participants undergoing day-case laparoscopic cholecystectomy (n = 239) versus overnight stay laparoscopic cholecystectomy (n = 253) for symptomatic gallstones. The number of participants in each trial ranged from 28 to 150. The proportion of women in the trials varied between 74% and 84%. The mean or median age in the trials varied between 40 and 47 years.With regards to primary outcomes, only one trial reported short-term mortality. However, the trial stated that there were no deaths in either of the groups. We inferred from the other outcomes that there was no short-term mortality in the remaining trials. Long-term mortality was not reported in any of the trials. There was no significant difference in the rate of serious adverse events between the two groups (4 trials; 391 participants; 7/191 (weighted rate 1.6%) in the day-surgery group versus 1/200 (0.5%) in the overnight stay surgery group; rate ratio 3.24; 95% CI 0.74 to 14.09). There was no significant difference in quality of life between the two groups (4 trials; 333 participants; SMD -0.11; 95% CI -0.33 to 0.10).There was no significant difference between the two groups regarding the secondary outcomes of our review: pain (3 trials; 175 participants; MD 0.02 cm visual analogue scale score; 95% CI -0.69 to 0.73); time to return to activity (2 trials, 217 participants; MD -0.55 days; 95% CI -2.18 to 1.08); and return to work (1 trial, 74 participants; MD -2.00 days; 95% CI -10.34 to 6.34). No significant difference was seen in hospital readmission rate (5 trials; 464 participants; 6/225 (weighted rate 0.5%) in the day-surgery group versus 5/239 (2.1%) in the overnight stay surgery group (rate ratio 1.25; 95% CI 0.43 to 3.63) or in the proportion of people requiring hospital readmissions (3 trials; 290 participants; 5/136 (weighted proportion 3.5%) in the day-surgery group versus 5/154 (3.2%) in the overnight stay surgery group; RR 1.09; 95% CI 0.33 to 3.60). No significant difference was seen in the proportion of failed discharge (failure to be discharged as planned) between the two groups (5 trials; 419 participants; 42/205 (weighted proportion 19.3%) in the day-surgery group versus 43/214 (20.1%) in the overnight stay surgery group; RR 0.96; 95% CI 0.65 to 1.41). For all outcomes except pain, the accrued information was far less than the diversity-adjusted required information size to exclude random errors.

AUTHORS' CONCLUSIONS

Day-surgery appears just as safe as overnight stay surgery in laparoscopic cholecystectomy. Day-surgery does not seem to result in improvement in any patient-oriented outcomes such as return to normal activity or earlier return to work. The randomised clinical trials backing these statements are weakened by risks of systematic errors (bias) and risks of random errors (play of chance). More randomised clinical trials are needed to assess the impact of day-surgery laparoscopic cholecystectomy on the quality of life as well as other outcomes of patients.

Dilatation of the bile duct in patients after cholecystectomy: a retrospective study

PURPOSE

Retrospective assessment of impact of cholecystectomy, age, and sex on bile duct (BD) diameter.

MATERIALS AND METHODS

We retrospectively reviewed abdominal contrast-enhanced multidetector computed tomography and laboratory reports of 290 consecutive patients (119 men; mean age, 55.9 years) who presented without cholestasis to the emergency department of our institution between June 2009 and August 2010. BD diameters were measured in 3 locations, by 2 independent observers, twice, at 1-month intervals. Reproducibility and agreement were evaluated by intraclass correlation coefficients and Bland-Altman analyses. The effects of cholecystectomy, age, and sex on BD diameter were analysed with linear mixed models.

RESULTS

BD diameter inter-reader reproducibility and agreement were excellent at the level of the right hepatic artery (intraclass correlation coefficient, 0.94). Sixty-one patients (21.0%) had a history of cholecystectomy. Among them, the 95th percentile of BD diameters at hepatic artery level was 7.9 mm (<50 years) and 12.3 mm (≥50 years). Among those without cholecystectomy, BD diameter was 6.2 mm (<50 years) and 7.7 mm (≥50 years). Cholecystectomy was associated with significantly larger BD diameters in both age groups (P < .001). Older age was associated with larger BD diameters (P = .004). Sex had no impact on BD diameter (P = .842).

CONCLUSION

Patients after cholecystectomy may present with an enlarged BD unrelated to cholestasis. The BD diameter increases with age. Clinicians should rely on cholecystectomy status, age, and laboratory results to determine needs of further investigation.

Lifestyle and gallstone disease: scope for primary prevention

OBJECTIVE

To study the antecedent risk factors in the causation of gallstone disease in a hospital-based case control study.

MATERIALS AND METHODS

Cases (n = 150) from all age groups and both sexes with sonographically proven gallstones were recruited over a duration of 3 months from the surgical wards of a tertiary care teaching hospital. Modes of presentation were also noted among cases. Age- and sex-matched controls (n = 150) were chosen from among ward inmates admitted for other reasons. Univariate and multivariate logistic regression analyses were performed for selected sociodemographic, dietary, and lifestyle-related variables.

RESULTS

Females had a higher prevalence of gallstone disease than males (P < 0.01). Among males, the geriatric age group (<60 years) was relatively more susceptible (28%). Prepubertal age group was least afflicted (3.3%). Univariate analysis revealed multiparity, high fat, refined sugar, and low fiber intakes to be significantly associated with gallstones. Sedentary habits, recent stress, and hypertension were also among the significant lifestyle-related factors. High body mass index and waist hip ratios, again representing unhealthy lifestyles, were the significant anthropometric covariates. However, only three of these, viz., physical inactivity, high saturated fats, and high waist hip ratio emerged as significant predictors on stepwise logistic regression analysis (P < 0.05).

CONCLUSION

Gallstone disease is frequent among females and elderly males. Significant predictor variables are abdominal adiposity, inadequate physical activity, and high intake of saturated fats; thus representing high risk lifestyles and yet amenable to primary prevention.

Robot assistant versus human or another robot assistant in patients undergoing laparoscopic cholecystectomy

BACKGROUND

The role of a robotic assistant in laparoscopic cholecystectomy is controversial. While some trials have shown distinct advantages of a robotic assistant over a human assistant others have not, and it is unclear which robotic assistant is best.

OBJECTIVES

The aims of this review are to assess the benefits and harms of a robot assistant versus human assistant or versus another robot assistant in laparoscopic cholecystectomy, and to assess whether the robot can substitute the human assistant.

SEARCH METHODS

We searched the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded (until February 2012) for identifying the randomised clinical trials.

SELECTION CRITERIA

Only randomised clinical trials (irrespective of language, blinding, or publication status) comparing robot assistants versus human assistants in laparoscopic cholecystectomy were considered for the review. Randomised clinical trials comparing different types of robot assistants were also considered for the review.

DATA COLLECTION AND ANALYSIS

Two authors independently identified the trials for inclusion and independently extracted the data. We calculated the risk ratio (RR) or mean difference (MD) with 95% confidence interval (CI) using the fixed-effect and the random-effects models based on intention-to-treat analysis, when possible, using Review Manager 5.

MAIN RESULTS

We included six trials with 560 patients. One trial involving 129 patients did not state the number of patients randomised to the two groups. In the remaining five trials 431 patients were randomised, 212 to the robot assistant group and 219 to the human assistant group. All the trials were at high risk of bias. Mortality and morbidity were reported in only one trial with 40 patients. There was no mortality or morbidity in either group. Mortality and morbidity were not reported in the remaining trials. Quality of life or the proportion of patients who were discharged as day-patient laparoscopic cholecystectomy patients were not reported in any trial. There was no significant difference in the proportion of patients who required conversion to open cholecystectomy (2 trials; 4/63 (weighted proportion 6.4%) in the robot assistant group versus 5/70 (7.1%) in the human assistant group; RR 0.90; 95% CI 0.25 to 3.20). There was no significant difference in the operating time between the two groups (4 trials; 324 patients; MD 5.00 minutes; 95% CI -0.55 to 10.54). In one trial, about one sixth of the laparoscopic cholecystectomies in which a robot assistant was used required temporary use of a human assistant. In another trial, there was no requirement for human assistants. One trial did not report this information. It appears that there was little or no requirement for human assistants in the other three trials. There were no randomised trials comparing one type of robot versus another type of robot.

AUTHORS' CONCLUSIONS

Robot assisted laparoscopic cholecystectomy does not seem to offer any significant advantages over human assisted laparoscopic cholecystectomy. However, all trials had a high risk of systematic errors or bias (that is, risk of overestimation of benefit and underestimation of harm). All trials were small, with few or no outcomes. Hence, the risk of random errors (that is, play of chance) is high. Further randomised trials with low risk of bias or random errors are needed.

Abdominal lift for laparoscopic cholecystectomy

BACKGROUND

Laparoscopic cholecystectomy (key-hole removal of the gallbladder) is now the most often used method for treatment of symptomatic gallstones. Several cardiopulmonary changes (decreased cardiac output, pulmonary compliance, and increased peak airway pressure) occur during pneumoperitoneum, which is now introduced to allow laparoscopic cholecystectomy. These cardiopulmonary changes may not be tolerated in individuals with poor cardiopulmonary reserve.

OBJECTIVES

To assess the benefits and harms of abdominal wall lift compared with pneumoperitoneum in patients undergoing laparoscopic cholecystectomy.

SEARCH METHODS

We searched the Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until January 2012.

SELECTION CRITERIA

We included all randomised clinical trials comparing abdominal wall lift (with or without pneumoperitoneum) versus pneumoperitoneum.

DATA COLLECTION AND ANALYSIS

We calculated the risk ratio (RR), rate ratio (RaR), or mean difference (MD) with 95% confidence intervals (CI) based on intention-to-treat analysis with both the fixed-effect and the random-effects models using RevMan software.

MAIN RESULTS

For abdominal wall lift with pneumoperitoneum versus pneumoperitoneum, a total of 156 participants (all with low anaesthetic risk) who underwent elective laparoscopic cholecystectomy were randomised in six trials to abdominal wall lift with pneumoperitoneum (n = 65) versus pneumoperitoneum only (n = 66). One trial which included 25 patients did not state the number of patients in each group. All six trials had a high risk of bias. There was no mortality or conversion to open cholecystectomy in any of the patients in the trials that reported these outcomes. There was no significant difference in the rate of serious adverse events between the two groups (2 trials; 2/29 events (0.069 events per patient) versus 2/29 events (0.069 events per patient); rate ratio 1.00; 95% CI 0.17 to 5.77). None of the trials reported quality of life, the proportion of patients discharged as day-patient laparoscopic cholecystectomies, or pain between four and eight hours after the operation. There was no significant difference in the operating time between the two groups (4 trials; 53 patients versus 54 patients; 13.39 minutes longer (2.73 less to 29.51 longer) in the abdominal wall lift with pneumoperitoneum group and 100 minutes in the pneumoperitoneum group).For abdominal wall lift versus pneumoperitoneum, a total of 774 participants (the majority with low anaesthetic risk) who underwent elective laparoscopic cholecystectomy were randomised in 18 trials to abdominal wall lift without pneumoperitoneum (n = 332) versus pneumoperitoneum (n = 358). One trial which included 84 patients did not state the number of patients in each group. All the trials had a high risk of bias. There was no mortality in any of the trials that reported this outcome. There was no significant difference in the rate of serious adverse events between the two groups (6 trials; 5/172 events (weighted number of events per patient = 0.020 events) versus 2/171 events (0.012 events per patient); rate ratio 1.73; 95% CI 0.35 to 8.61). None of the trials reported quality of life or pain between four and eight hours after the operation. There was no significant difference in the proportion of patients who underwent conversion to open cholecystectomy (11 trials; 5/225 (weighted proportion 2.3%) versus 7/235 (3.0%); RR 0.76; 95% CI 0.26 to 2.21). The operating time was significantly longer in the abdominal wall lift group than the pneumoperitoneum group (16 trials; 6.87 minutes longer (4.74 to 9.00 longer) in the abdominal wall lift group; 75 minutes in the pneumoperitoneum group). There was no significant difference in the proportion of patients who were discharged as day-patient laparoscopic cholecystectomy patients (2 trials; 15/31 (weighted proportion 48.5%) versus 9/31 (29%); RR 1.67; 95% CI 0.85 to 3.26).

AUTHORS' CONCLUSIONS

Abdominal wall lift does not seem to offer an advantage over pneumoperitoneum in any of the patient-oriented outcomes for laparoscopic cholecystectomy in patients with low anaesthetic risk. It may increase costs by increasing the operating time. Hence it cannot be recommended routinely. The safety of abdominal wall lift is yet to be established. More research on the topic is needed because of the risk of bias in the included trials and because of the risk of type I and type II random errors because of the few patients included in the trials. Such trials ought to include patients at higher anaesthetic risk. Furthermore, such trials ought to include blinded assessment of outcome measures.

Could gastrointestinal disorders differ in two close but divergent social environments?

BACKGROUND

Many public health problems in modern society affect the gastrointestinal area. Knowledge of the disease occurrence in populations is better understood if viewed in a psychosocial context including indicators of the social environment where people spend their lives. The general aim of this study was to estimate the occurrence in the population and between sexes of common gastrointestinal conditions in two neighborhood cities representing two different social environments defined as a "white-collar" and a "blue-collar" city.

METHODS

We conducted a retrospective register study using data of diagnosed gastrointestinal disorders (cumulative incidence rates) derived from an administrative health care register based on medical records assigned by the physicians at hospitals and primary care.

RESULTS

Functional gastrointestinal diseases and peptic ulcers were more frequent in the white-collar city, while diagnoses in the gallbladder area were significantly more frequent in the blue-collar city. Functional dyspepsia, irritable bowel syndrome, and unspecified functional bowel diseases, and celiac disease, were more frequent among women while esophageal reflux, peptic ulcers, gastric and rectal cancers were more frequent among men regardless of social environment.

CONCLUSIONS

Knowledge of the occurrence of gastrointestinal problems in populations is better understood if viewed in a context were the social environment is included. Indicators of the social environment should therefore also be considered in future studies of the occurrence of gastrointestinal problems.

Day case laparoscopic cholecystectomy carried out using the harmonic scalpel: analysis of a standard procedure

INTRODUCTION

Our aim was to determine the efficiency and safety of laparoscopic cholecystectomy carried out using the harmonic scalpel as a day case procedure.

METHODS

A prospective study was done on patients presenting for Laparoscopic cholecystectomy. The harmonic scalpel was used with retrograde dissection. All patients were considered for discharge the same day unless considered medically unfit.

RESULTS

Laparoscopic cholecystectomy using the harmonic scalpel was carried out on 100 patients. Major complications were as follows: conversion to open procedure -1%, common bile duct injury -1%, and bile leak from the cystic duct stump -1%. Our same day discharge rate was 65%, and age more than 65 was the only independent predictor of overnight admission (P=0.009).

CONCLUSIONS

Laparoscopic cholecystectomy using the harmonic scalpel is associated with a low complication rate and a high-same-day discharge rate when carried out as a day case procedure.

Three dimensional versus two dimensional imaging for laparoscopic cholecystectomy

BACKGROUND

The benefits and harms of three dimensional imaging versus traditional two dimensional imaging for laparoscopic cholecystectomy are not known.

OBJECTIVES

To assess the benefits and harms of use of three dimensional systems versus two dimensional systems during laparoscopic cholecystectomy.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until October 2010 for randomised clinical trials.

SELECTION CRITERIA

Only randomised clinical trials, irrespective of language, blinding, or publication status were considered for the review.

DATA COLLECTION AND ANALYSIS

Two authors independently identified trials and independently extracted data. We intended to calculate the risk ratio (RR), mean difference (MD), or standardised mean difference (SMD) with 95% confidence intervals (CI) using both the fixed-effect and the random-effects models with RevMan 5 based on intention-to-treat analysis.

MAIN RESULTS

One trial randomised 60 patients to three dimensional laparoscopic cholecystectomy (n = 30) versus standard two dimensional laparoscopic cholecystectomy (n = 30). This trial was of high risk of bias. There were no post-operative complications or conversion to open cholecystectomy in either group. There was no significant difference in the operating time (MD -1.00 minute; 95% CI -17.77 to 15.77) or number of errors between the two groups.

AUTHORS' CONCLUSIONS

Currently, there is no evidence that three dimensional image is superior to two dimensional image in laparoscopic cholecystectomy.

Methods of cystic duct occlusion during laparoscopic cholecystectomy

BACKGROUND

During laparoscopic cholecystectomy, it is necessary to occlude the cystic duct permanently. Traditionally, this has been performed through the application of non-absorbable metal clips. Use of absorbable materials to occlude the cystic duct has been suggested as an alternative for metal clips for various reasons.

OBJECTIVES

To assess the benefits and harms of the different methods of occlusion of cystic duct in patients undergoing laparoscopic cholecystectomy.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, The Cochrane Central Register of Controlled Trials in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until August 2010.

SELECTION CRITERIA

We included all randomised clinical trials comparing different methods of occlusion of cystic duct.

DATA COLLECTION AND ANALYSIS

We collected the data on the characteristics, methodological quality, bile duct injury, bile leaks, operating time, and incidence of recurrent common bile duct stone from each trial. We analysed the data with both the fixed-effect and the random-effects model using RevMan Analysis. For each outcome we calculated the risk ratio (RR) in the presence of more than one trial for the outcome or mean difference (MD) with 95% confidence intervals (CI) based on intention-to-treat analysis. In the presence of only one trial under a dichotomous outcome, we performed the Fisher's exact test.

MAIN RESULTS

Three trials including 255 patients qualified for this review. In two of the trial, a total of 150 patients were randomised to absorbable clips (n = 75) and non-absorbable clips (n = 75). In the third trial, a total of 105 patients were randomised to absorbable ligatures (n = 53) and non-absorbable clips (n = 52). All three trials were of high risk of bias. There was no difference in the morbidity between the groups. There was statistically significant longer operating time (MD 12.00 minutes, 95% CI 1.59 to 22.41) in the absorbable ligature group than non-absorbable clips. The duration and method of follow-up were not adequate to determine the incidence of long-term complications.

AUTHORS' CONCLUSIONS

We are unable to determine the benefits and harms of different methods of cystic duct occlusion because of the small sample size, short period of follow-up, and lack of reporting of important outcomes in the included trials. Adequately powered randomised trials with low risk of bias and with long periods of follow-up and assessing all of the important outcomes for patients and professionals are necessary.

Prophylactic cholecystectomy in midgut carcinoid patients

BACKGROUND

Patients with midgut carcinoid (MGC) tumors are commonly treated with somatostatin analogs. Adverse effects of these drugs include impairment of gallbladder function, formation of gallstones, and cholecystitis. Prophylactic cholecystectomy has been advocated, but data to support this recommendation are sparse. We have analyzed a cohort of 235 patients with MGC focusing on the risk for gallstone formation and complications thereof.

METHODS

Forty-eight of the 235 patients had been cholecystectomized before surgery for MGC. Of the remaining 187 patients, 144 were treated with somatostatin analogs. Eighteen of the 187 patients had their gall bladder removed during the primary carcinoid surgery.

RESULTS

Twenty-two of the 144 somatostatin-analog-treated patients developed complications, such as gallbladder empyema (n = 1), cholangitis (n = 2), acute cholecystitis (n = 6), acute pancreatitis (n = 1) or acute pancreatitis and cholecystitis (n = 1), or biliary colic (n = 11). Ninety-two of the 144 were examined during surgery, by computed tomography, or by ultrasound, most for reasons other than gallbladder-related indications, and 63% (58/92) of these examinations revealed gallstones. Of the 43 patients not treated with somatostatin analogs, only 3 patients suffered from biliary colic and underwent cholecystectomy.

CONCLUSIONS

In our study the incidence of gallstone-related complications seems to be higher than in the general population. We recommend that prophylactic cholecystectomy is liberally performed during laparotomy for MGC if patients are planned to undergo treatment with somatostatin analogs.

Miniport versus standard ports for laparoscopic cholecystectomy

BACKGROUND

In conventional (standard) laparoscopic cholecystectomy, four abdominal ports (two of 10 mm diameter and two of 5 mm diameter) are used. Recently, use of smaller ports have been reported.

OBJECTIVES

To assess the benefits and harms of miniport (defined as ports smaller than conventional ports) laparoscopic cholecystectomy versus standard laparoscopic cholecystectomy.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until September 2009 for identifying the randomised trials.

SELECTION CRITERIA

Only randomised clinical trials (irrespective of language, blinding, or publication status) comparing miniport versus standard ports laparoscopic cholecystectomy were considered for the review.

DATA COLLECTION AND ANALYSIS

Two authors collected the data independently. We analysed the data with both the fixed-effect and the random-effects models using RevMan Analysis. For each outcome we calculated the risk ratio (RR), mean difference (MD), or standardised mean difference (SMD) with 95% confidence intervals (CI).

MAIN RESULTS

We included thirteen trials with 803 patients randomised to miniport (n = 416) versus standard ports laparoscopic cholecystectomy (n = 387). In twelve trials, four ports were used. In one trial, three ports were used. The bias risk of all trials was high. Miniport laparoscopic cholecystectomy could be completed successfully in 87% of patients. The remaining patients were mostly converted to standard laparoscopic cholecystectomy but some were also converted to open cholecystectomy. Further information about these patients who underwent conversion to open cholecystectomy was not available in most trials. In the patients on whom information was available, there was no mortality reported; and there was no significant difference in the surgery-related morbidity or conversion to open cholecystectomy. Most trials excluded the patients who were converted to standard laparoscopic cholecystectomy. In patients who underwent successful miniport laparoscopic cholecystectomy, the pain was significantly lower in the miniport group than in the standard port at various time points.

AUTHORS' CONCLUSIONS

Miniport laparoscopic cholecystectomy can be completed successfully in more than 85% of patients. Patients, in whom elective miniport laparoscopic cholecystectomy was completed successfully, had lower pain than those who underwent standard laparoscopic cholecystectomy. However, because of the lack of information on its safety, miniport laparoscopic cholecystectomy cannot be recommended outside well-designed, randomised clinical trials.

Meta-analysis of randomized controlled trials on the safety and effectiveness of early versus delayed laparoscopic cholecystectomy for acute cholecystitis

BACKGROUND

: In many countries laparoscopic cholecystectomy for acute cholecystitis is mainly performed after the acute episode has settled because of the anticipated increased risk of morbidity and higher conversion rate from laparoscopic to open cholecystectomy.

METHODS

: A systematic review was performed with meta-analysis of randomized clinical trials of early laparoscopic cholecystectomy (ELC; performed within 1 week of onset of symptoms) versus delayed laparoscopic cholecystectomy (performed at least 6 weeks after symptoms settled) for acute cholecystitis. Trials were identified from The Cochrane Library trials register, Medline, Embase, Science Citation Index Expanded and reference lists. Risk ratio (RR) or mean difference was calculated with 95 per cent confidence intervals (c.i.) based on intention-to-treat analysis.

RESULTS

: Five trials with 451 patients were included. There was no significant difference between the two groups in terms of bile duct injury (RR 0.64 (95 per cent c.i. 0.15 to 2.65)) or conversion to open cholecystectomy (RR 0.88 (95 per cent c.i. 0.62 to 1.25)). The total hospital stay was shorter by 4 days for ELC (mean difference -4.12 (95 per cent c.i. -5.22 to -3.03) days).

CONCLUSION

: ELC during acute cholecystitis appears safe and shortens the total hospital stay.

Incidence of and potential risk factors for gallstone disease in a general population sample

BACKGROUND

Several epidemiological studies have been published, but there are few reports on relations between gallstone incidence, symptomatology and risk factors.

METHODS

Of 621 randomly selected individuals aged 35-85 years in a general population who had been screened previously with ultrasonography and found to have no gallbladder stones, 503 (81.0 per cent) were re-examined after a minimum interval of 5 years. At baseline and re-examination, heredity for gallstone disease was explored and body mass index, digestive symptoms including abdominal pain, quality of life, alcohol and smoking habits, use of non-steroidal anti-inflammatory drugs and oestrogen, parity and blood lipid levels were recorded.

RESULTS

Forty-two (8.3 per cent) of the 503 subjects developed stones. Subjects were followed for a total of 3025.8 person-years, yielding an incidence for newly developed gallstones of 1.39 per 100 person-years. A positive association for gallstone development was found only for length of follow-up and plasma low-density lipoprotein-cholesterol levels at baseline. Weekly alcohol consumption was inversely related to gallstone development.

CONCLUSION

The incidence of gallstones in this population was 1.39 per 100 person-years. Gallstone development was related to length of follow-up and LDL-cholesterol levels, and inversely related to alcohol consumption.

Low pressure versus standard pressure pneumoperitoneum in laparoscopic cholecystectomy

BACKGROUND

A pneumoperitoneum of 12 to 16 mmHg is used for laparoscopic cholecystectomy. Lower pressures are claimed to be safe and effective in decreasing cardiopulmonary complications and pain.

OBJECTIVES

To assess the benefits and harms of low pressure pneumoperitoneum compared with standard pressure pneumoperitoneum in patients undergoing laparoscopic cholecystectomy.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until November 2008 for identifying randomised trials using search strategies.

SELECTION CRITERIA

Only randomised clinical trials, irrespective of language, blinding, or publication status were considered for the review.

DATA COLLECTION AND ANALYSIS

Two authors independently identified trials and independently extracted data on mortality, morbidity, conversion to open cholecystectomy, pain, analgesic requirement, operating time, hospital stay, patient satisfaction, additional measures to increase vision, and cardiopulmonary parameters. We calculated the risk ratio (RR), mean difference (MD), or standardised mean difference (SMD) with 95% confidence intervals (CI) using both the fixed-effect and the random-effects models with RevMan 5 based on available case-analysis.

MAIN RESULTS

Fifteen trials randomised 690 patients to low pressure (n = 336) and standard pressure (n = 354). All the trials were of high risk of bias. There was no difference in the mortality, morbidity, or conversion to open cholecystectomy between the groups. The intensity of pain was lower in the low pressure group at various time points. The incidence of shoulder pain was lower in the low pressure group (RR 0.53; 95% CI 0.31 to 0.90). The analgesic consumption was also lower. The operating time was similar between the groups (MD 2.30 minutes; 95% CI 0.42 to 4.18). Because of the high risk of bias due to incomplete outcome data in seven trials, it was not possible to conclude about the safety of low pressure pneumoperitoneum.

AUTHORS' CONCLUSIONS

Low pressure pneumoperitoneum appears effective in decreasing pain after laparoscopic cholecystectomy. The safety of low pressure pneumoperitoneum has to be established.

Robot assistant for laparoscopic cholecystectomy

BACKGROUND

The role of a robotic assistant in laparoscopic cholecystectomy is controversial. While some trials have shown distinct advantages of robotic assistant over a human assistant, others have not, and it is unclear which robotic assistant is best.

OBJECTIVES

The aims of this review are to compare the safety of robot assistant versus human assistant in laparoscopic cholecystectomy and to assess whether the robot can substitute for the human assistant.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until May 2008 for identifying the randomised trials using The Cochrane Hepato-Biliary Group search strategy.

SELECTION CRITERIA

Only randomised clinical trials (irrespective of language, blinding, or publication status) comparing robot assistants versus human assistants in laparoscopic cholecystectomy were considered for the review. Randomised clinical trials comparing different types of robot assistants were also considered for the review.

DATA COLLECTION AND ANALYSIS

Two authors independently identified the trials for exclusion and independently extracted the data. We calculated the risk ratio, mean difference, or standardised mean difference with 95% confidence intervals using the fixed-effect and the random-effects models based on available case-analysis using RevMan 5.

MAIN RESULTS

We included five trials (all of high risk of bias) with 453 patients randomised: 159 to the robot-assistant group and 165 to the human assistant group (one trial report of 129 patients was a conference abstract, not reporting on the number of patients in each group). There was no statistically significant difference between the two groups for morbidity, conversion to open cholecystectomy, total operating time, or hospital stay when fixed-effect or random-effects model were used. The instrument set-up time was significantly lower in the human assistant group. In one trial, about one sixth of the laparoscopic cholecystectomies in which robot assistant was used, required temporary use of a human assistant. It appears that there was little or no requirement for human assistants in the other three published trials. In two of the three trials, which reported surgeons' preference, the surgeons preferred a robot assistant to a human assistant. There was no statistically significant difference in the accuracy when the random-effects model was used. There was no difference in the errors.

AUTHORS' CONCLUSIONS

Although robot-assisted laparoscopic cholecystectomy appears safe, there seems to be no significant advantages over human-assisted laparoscopic cholecystectomy. We were unable to identify trials comparing one type of robot assistant versus another. Further randomised trials with low bias-risk and random errors are needed.

Early versus delayed laparoscopic cholecystectomy for biliary colic

BACKGROUND

Biliary colic is one of the commonest indications for laparoscopic cholecystectomy. Laparoscopic cholecystectomy involves several months of waiting if performed electively. However, patients can develop life-threatening complications during this waiting period.

OBJECTIVES

To assess the benefits and harms of early versus delayed laparoscopic cholecystectomy for patients with biliary colic due to gallstones.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, The Cochrane Central Register of Controlled Trials in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until March 2008.

SELECTION CRITERIA

We included only randomised clinical trials irrespective of language and publication status.

DATA COLLECTION AND ANALYSIS

Two authors independently extracted the data. We intended to calculate the risk ratio, risk difference with 95% confidence intervals (CI) for dichotomous outcomes, and weighted mean difference (WMD) with 95% CI for continuous outcomes using RevMan 4.2 based on intention-to-treat analysis.

MAIN RESULTS

Only one trial including 75 patients, randomised to early laparoscopic cholecystectomy (less than 24 hours of diagnosis) (n = 35) and delayed laparoscopic cholecystectomy (mean waiting period of 4.2 months) (n = 40), qualified for this review. This trial was of high risk of bias. During the waiting period in the delayed group (mean 4.2 months), the complications that the patients suffered included severe acute pancreatitis resulting in mortality (1), empyema of gallbladder (1), gallbladder perforation (1), acute cholecystitis (2), cholangitis (2), obstructive jaundice (2), and recurrent biliary colic requiring hospital visits (5). The rate of conversion to open cholecystectomy was lower in the early group (0%) than the delayed group (8/40 or 20%) (p = 0.0172). There was a statistically significant shorter operating time and hospital stay in the early group than the delayed group (WMD -14.80 minutes, 95% CI -18.02 to -11.58 and -1.25 days, 95% CI -2.05 to -0.45 respectively). Fourteen patients (35%) required 18 hospital admissions for symptoms related to gallstones during the mean waiting period of 4.2 months in the delayed group. This is equivalent to 11 admissions per 100 persons per month.

AUTHORS' CONCLUSIONS

Based on evidence from only one high-bias risk trial, it appears that early laparoscopic cholecystectomy (< 24 hours of diagnosis of biliary colic) decreases the morbidity during the waiting period for elective laparoscopic cholecystectomy, decreases the rate of conversion to open cholecystectomy, decreases operating time, and decreases hospital stay. Further randomised clinical trials are necessary to confirm or refute this finding.

Day-case versus overnight stay for laparoscopic cholecystectomy

BACKGROUND

Although day-case elective laparoscopic cholecystectomy can save bed costs, its safety remains to be established.

OBJECTIVES

To assess the safety and benefits of day-case surgery compared to overnight stay in patients undergoing elective laparoscopic cholecystectomy.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until April 2008 for identifying randomised trials using search strategies.

SELECTION CRITERIA

Only randomised clinical trials, irrespective of language, blinding, or publication status, comparing day-case and overnight stay in elective laparoscopic cholecystectomy were considered for the review.

DATA COLLECTION AND ANALYSIS

We collected the data on the characteristics of the trial, methodological quality of the trials, morbidity, prolonged hospitalisation, re-admissions, pain and quality of life from each trial. We analysed the data with both the fixed-effect and the random-effects models using RevMan Analysis. For each outcome we calculated the risk ratio, weighted mean difference, or standardised mean difference with 95% confidence intervals (CI) based on available case-analysis.

MAIN RESULTS

Five trials with 429 patients randomised to the day-case group (215) and overnight stay group (214) were included in the review. All the trials were of high risk of bias. The trials recruited 49% of patients undergoing cholecystectomy. The selection criteria varied, but most included only patients without other diseases. The patients were living in easy reach of the hospital and with a responsible adult to take care of them. On the day of surgery, 81% of day-case patients were discharged. The drop-out rate after randomisation varied from 6.5% to 12.7%. There was no significant difference between day-case and overnight stay group as regards to morbidity, prolongation of hospital stay, re-admission rates, pain, quality of life, patient satisfaction and return to normal activity and work.

AUTHORS' CONCLUSIONS

Day-case elective laparoscopic cholecystectomy seems to be a safe and effective intervention in selected patients (with no or minimal systemic disease and within easy reach of the hospital) with symptomatic gallstones. Because of the decreased hospital stay, it is likely to save costs.

Defined indications for elective cholecystectomy for gallstone disease

BACKGROUND

This study examined symptomatology and quality of life following elective cholecystectomy for symptomatic gallstone disease with defined indications for surgery.

METHODS

In this prospective study of 200 consecutive patients (161 women; median age 46.5 (range 24-79) years), strict indications for elective cholecystectomy were stipulated. Digestive symptoms and quality of life were recorded with a self-administered questionnaire before and at 3 and 12 months after surgery.

RESULTS

Of 149 patients who experienced abdominal pain with typical location before surgery, 136 (91.3 per cent) reported total remission or reduced frequency of that type of pain 12 months later. Of 35 patients who reported atypical or multiple pain location before operation, 27 (77 per cent) experienced reduced frequency or disappearance of that type of pain. Frequency of pain episodes, atypical or multiple pain location, specific food intolerance and frequency of disturbing abdominal gas at baseline correlated positively with the frequency of abdominal pain episodes at 12 months after surgery. There was a tendency towards an inverse relation to age.

CONCLUSION

The frequency of persistent abdominal pain after elective cholecystectomy was low among patients with typical pain location before surgery. Atypical pain location, and frequent pain episodes before operation significantly reduced the chance of becoming pain-free.

Abdominal lift for laparoscopic cholecystectomy

BACKGROUND

Laparoscopic cholecystectomy is the main method of treatment of symptomatic gallstones. Several cardiopulmonary changes (decreased cardiac output, pulmonary compliance, and increased peak airway pressure) occur during pneumoperitoneum. These changes may not be tolerated in individuals with poor cardiopulmonary reserve.

OBJECTIVES

To assess the benefits and harms of abdominal wall lift compared to pneumoperitoneum in patients undergoing laparoscopic cholecystectomy.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, The Cochrane Central Register of Controlled Trials in The Cochrane Library, MEDLINE, EMBASE, and Science Citation IndexExpanded until January 2007.

SELECTION CRITERIA

We included all randomised clinical trials comparing abdominal wall lift (with or without pneumoperitoneum) and pneumoperitoneum.

DATA COLLECTION AND ANALYSIS

We calculated the relative risk (RR), weighted mean difference (WMD) or standardised mean difference (SMD) with 95% confidence intervals (CI) based on intention-to-treat analysis with both the fixed-effect and the random-effects model using RevMan Analysis.

MAIN RESULTS

Abdominal wall lift with pneumoperitoneum versus pneumoperitoneum. A total of 156 participants (all with low anaesthetic risk) who underwent elective laparoscopic cholecystectomy were randomised in six trials to abdominal wall lift with pneumoperitoneum (n = 65) versus pneumoperitoneum only (n = 66). One trial which included 25 patients did not state the number of patients in each group. All six trials were of high risk of bias. The cardiopulmonary changes were less in abdominal wall lift than pneumoperitoneum. There was no difference in the morbidity and pain between the groups. Abdominal wall lift versus pneumoperitoneum. A total of 550 participants (the majority with low anaesthetic risk) who underwent elective laparoscopic cholecystectomy were randomised in fourteen trials to abdominal wall lift without pneumoperitoneum (n = 268) versus pneumoperitoneum (n = 282). Two of these fourteen trials were of low risk of bias. The cardiopulmonary changes were less in abdominal wall lift than with pneumoperitoneum. There was no difference in the morbidity and pain between the groups. The operating time was prolonged in abdominal wall lift compared with pneumoperitoneum (WMD 7.74, 95% CI 1.37 to 14.12).

AUTHORS' CONCLUSIONS

(1) Abdominal wall lift seems safe and decreases the cardiopulmonary changes associated with laparoscopic cholecystectomy.(2) Abdominal wall lift does not seem to offer advantage over pneumoperitoneum in any of the patient-oriented outcomes for laparoscopic cholecystectomy in patients with low anaesthetic risk and may increase costs by increasing the operating time. Hence it cannot be recommended routinely. More research on the topic is needed.

Gallbladder disease in patients with primary sclerosing cholangitis

BACKGROUND/AIMS

Gallbladder abnormalities may be part of the spectrum in primary sclerosing cholangitis (PSC). The aim of the present study was to evaluate the occurrence and prognostic importance of gallbladder abnormalities in patients with PSC.

METHODS

Presence of gallbladder abnormalities was assessed in 286 patients with PSC treated at the Liver Unit, Karolinska University Hospital, Huddinge, between 1970 and 2005.

RESULTS

One or more gallbladder abnormalities were found in 41% of the patients. Gallstones were found in 25% and cholecystitis in 25%. Cholecystitis among patients with extrahepatic involvement of PSC (30% (65/214)) was significantly higher than among those with intrahepatic involvement (9% (6/70)) (P<0.0001). A gallbladder mass lesion with a mean size of 21 (+/-9) mm (S.D.) was found in 18 (6%) patients, in 56% (10/18) of whom it constituted gallbladder carcinoma. In 9 patients without a gallbladder mass lesion, histological re-evaluation disclosed epithelial dysplasia of the gallbladder.

CONCLUSIONS

Gallbladder disease is common in patients with PSC. Dysplasia and carcinoma are commonly found in gallbladder epithelium, suggesting that regular examination of the gallbladder in PSC patients could be of value for early detection of a gallbladder mass lesion. Cholecystectomy is recommended when such a lesion is detected, regardless of its size.

Day-case versus overnight stay in laparoscopic cholecystectomy

BACKGROUND

Although day-case elective laparoscopic cholecystectomy can save bed costs, its safety remains to be established.

OBJECTIVES

To assess the safety and benefits of day-case surgery compared to overnight stay in patients undergoing elective laparoscopic cholecystectomy.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation Index Expanded until February 2007 for identifying randomised trials using search strategies.

SELECTION CRITERIA

Only randomised clinical trials, irrespective of language, blinding, or publication status, comparing day-case and overnight stay in elective laparoscopic cholecystectomy were considered for the review.

DATA COLLECTION AND ANALYSIS

We collected the data on the characteristics of the trial, methodological quality of the trials, morbidity, prolonged hospitalisation, re-admissions, pain and quality of life from each trial. We analysed the data with both the fixed-effect and the random-effects models using RevMan Analysis. For each outcome we calculated the relative risk, weighted mean difference, or standardised mean difference with 95% confidence intervals (CI) based on available case-analysis.

MAIN RESULTS

Five trials with 429 patients randomised to the day-case group (215) and overnight stay group (214) were included in the review. Four of the five trials were of low risk of bias regarding randomisation and follow up, but all lacked blinding. The trials recruited 49% of patients undergoing cholecystectomy. The selection criteria varied, but most included only patients without other diseases. The patients were living in easy reach of the hospital and with a responsible adult to take care of them. On the day of surgery, 81% of day-case patients were discharged. The drop-out rate after randomisation varied from 6.5% to 12.7%. There was no significant difference between day-case and overnight stay group as regards to morbidity, prolongation of hospital stay, re-admission rates, pain, quality of life, patient satisfaction and return to normal activity and work.

AUTHORS' CONCLUSIONS

Day-case elective laparoscopic cholecystectomy seems to be a safe and effective intervention in selected patients (with no or minimal systemic disease and within easy reach of the hospital) with symptomatic gallstones. Because of the decreased hospital stay, it is likely to save costs.

Asymptomatic cholelithiasis: is cholecystectomy really needed? A critical reappraisal 15 years after the introduction of laparoscopic cholecystectomy

Asymptomatic cholelithiasis is increasingly diagnosed today, mainly as a result of the widespread use of abdominal ultrasonography for the evaluation of patients for unrelated or vague abdominal complaints. About 10-20% of people in most western countries have gallstones, and among them 50-70% are asymptomatic at the time of diagnosis. Asymptomatic gallstone disease has a benign natural course; the progression of asymptomatic to symptomatic disease is relatively low, ranging from 10-25%. The majority of patients rarely develop gallstone-related complications without first having at least one episode of biliary pain ("colic"). In the prelaparoscopy era, (open) cholecystectomy was generally performed for symptomatic disease. The minimally invasive laparoscopic cholecystectomy refueled the discussion about the optimal management of asymptomatic cholelithiasis. Despite some controversy, most authors agree that the vast majority of subjects should be managed by observation alone (expectant management). Selective cholecystectomy is indicated in defined subgroups of subjects, with an increased risk for the development of gallstone-related symptoms and complications. Concomitant cholecystectomy is a reasonable option for good-risk patients with asymptomatic cholelithiasis undergoing abdominal surgery for unrelated conditions. Routine cholecystectomy for all subjects with silent gallstones is a too aggressive management option, not indicated for most subjects with asymptomatic cholelithiasis. An in-depth knowledge of the natural history of gallstone disease is required to select the optimal management option for the individual subject with silent gallstones. Management options should be extensively discussed with the patient; he or she should be actively involved in the process of therapeutic decision making.

Incidence and risk factors for gallstones in patients with inflammatory bowel disease: a large case-control study

The risk for gallstones (GD) in inflammatory bowel diseases and the factors responsible for this complication have not been well established. We studied the incidence of GD in a cohort of Crohn's disease (CD) and ulcerative colitis (UC) patients and investigated the related risk factors. A case-controlled study was carried out. The study population included 634 inflammatory bowel disease (IBD) patients (429 CD, 205 UC) and 634 age-matched, sex-matched, and body mass index (BMI)-matched controls free of GD at enrollment, who were followed for a mean of 7.2 years (range, 5-11 years). The incidence of GD was calculated by dividing the number of events per person-years of follow-up. Multivariate analysis was used to discriminate among the impact of different variables on the risk of developing GD. The incidence rates of GD were 14.35/1,000 persons/year in CD as compared with 7.75 in matched controls (P=0.012) and 7.48/1000 persons/year in UC patients as compared with 6.06 in matched-controls (P=0.38). Ileo-colonic CD location (OR, 2.14), disease duration>15 years (OR, 4.26), >3 clinical recurrences (OR, 8.07), ileal resection>30 cm (OR, 7.03), >3 hospitalizations (OR, 20.7), multiple TPN treatments (OR, 8.07), and long hospital stay (OR, 24.8) were significantly related to GD in CD patients.

CONCLUSION

Only CD patients have a significantly higher risk of developing GD than well-matched hospital controls. Site of disease at diagnosis, lifetime surgery, extent of ileal resections, number of clinical recurrences, TPN, and the frequency and duration of hospitalizations are independently associated with GD.

Early versus delayed laparoscopic cholecystectomy for acute cholecystitis

BACKGROUND

Gallstones are present in about 10% to 15% of the adult western population. Between 1% and 4% become symptomatic in a year. Cholecystectomy for symptomatic gallstones is mainly performed after the acute cholecystitis episode settles because of the fear of higher morbidity and conversion from laparoscopic cholecystectomy to open cholecystectomy during acute cholecystitis.

OBJECTIVES

The aim was to compare the early laparoscopic cholecystectomy (less than seven days of onset of symptoms) versus delayed laparoscopic cholecystectomy (more than six weeks after index admission) with regards to benefits and harms.

SEARCH STRATEGY

We searched The Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library, MEDLINE, EMBASE, and Science Citation IndexExpanded until November 2005.

SELECTION CRITERIA

We considered for inclusion all randomised clinical trials comparing early versus delayed laparoscopic cholecystectomy for acute cholecystitis.

DATA COLLECTION AND ANALYSIS

We collected the data on the characteristics of the trial, methodological quality of the trials, mortality, morbidity, conversion rate, operating time, and hospital stay from each trial. We analysed the data with both the fixed-effect and the random-effects models using RevMan Analysis. For each outcome we calculated the odds ratio (OR) with 95% confidence intervals (CI) based on intention-to-treat analysis.

MAIN RESULTS

We included five trials with 451 patients randomised: 223 to the early group and 228 to the delayed group. Surgery was performed on 222 patients in the early group and on 216 patients in the delayed group. There was no mortality in any of the trials. Four of the five trials were of high methodological quality. There was no statistically significant difference between the two groups for any of the outcomes including bile duct injury (OR 0.63, 95% CI 0.15 to 2.70) and conversion to open cholecystectomy (OR 0.84, 95% CI 0.53 to 1.34). Various other analyses including 'available case analysis', risk difference, statistical methods to overcome the 'zero-event trials' showed no statistically significant difference between the two groups in any of the outcomes measured. A total of 40 patients (17.5%) from the delayed group had to undergo emergency laparoscopic cholecystectomy due to non-resolving or recurrent cholecystitis; 18 (45%) of these had to undergo conversion to open procedure. The total hospital stay was about three days shorter in the early group compared with the delayed group.

AUTHORS' CONCLUSIONS

Early laparoscopic cholecystectomy during acute cholecystitis seems safe and shortens the total hospital stay. The majority of the outcomes occurred rarely; hence, the confidence intervals are wide. Therefore, further randomised trials on the issue are needed.

Gallstone disease: Epidemiology of gallbladder stone disease

Gallstone disease is common: >700,000 cholecystectomies and costs of approximately 6.5 billion dollars annually in the U.S. The burden of disease is epidemic in American Indians (60-70%); a corresponding decrease occurs in Hispanics of mixed Indian origin. Ten to fifteen per cent of white adults in developed countries harbour gallstones. Frequency is further reduced in Black Americans, East Asia and sub-Saharan Africa. In developed countries, cholesterol gallstones predominate; 15% are black pigment. East Asians develop brown pigment stones in bile ducts, associated with biliary infection or parasites, or in intrahepatic ducts (hepatolithiasis). Certain risk factors for gallstones are immutable: female gender, increasing age and ethnicity/family (genetic traits). Others are modifiable: obesity, the metabolic syndrome, rapid weight loss, certain diseases (cirrhosis, Crohn's disease) and gallbladder stasis (from spinal cord injury or drugs like somatostatin). The only established dietary risk is a high caloric intake. Protective factors include diets containing fibre, vegetable protein, nuts, calcium, vitamin C, coffee and alcohol, plus physical activity.

Cholecystectomy in Sweden 1987-99: a nationwide study of mortality and preoperative admissions

OBJECTIVE

Information on mortality after cholecystectomy in defined populations is limited. In this study we examined the case fatality rates and mortality ratios, based on register data.

MATERIAL AND METHODS

Hospital discharge and death certificate data were linked for all patients undergoing cholecystectomy in Sweden in 1987-99. Mortality risk was calculated as the standardized mortality ratio (SMR).

RESULTS

From 1 January 1987 to 1 December 1999, 123,099 patients underwent cholecystectomy for acute or chronic gallbladder disease. Between 1987-91 and 1995-99, the incidence of cholecystectomy increased by 13%, median age of patients decreased and the proportion of women increased. From 1995 to 1999, 32% of all cholecystectomies were completed as open cholecystectomy. During this period, 82% of patients aged 70 years or older with acute gallstone disease had an open cholecystectomy. For patients with chronic gallstone disease, the proportion was 43%. Postoperative crude mortality within 30 days for all patients was 0.4%. Patients with acalculous gallbladder disease had double the mortality risk compared with patients with calculous disease, and patients with acute cholecystitis had double the risk compared with patients with chronic disease. High age, previous hospital admission for conditions other than gallbladder disease, and cholecystectomy completed as an open procedure increased the risk, whereas gender and calendar year did not significantly affect the mortality risk. Biliary tract diseases accounted for 61% of all postoperative deaths, whereas 26% were due to cardiovascular diseases.

CONCLUSIONS

During the 1990s, cholecystectomy incidence increased, whereas postoperative mortality risk remained unchanged. In order to further reduce the mortality risk, particular attention should be paid to elderly and frail patients and to patients with acalculous gallbladder disease.

Epidemiology and risk factors for gallstone disease: has the paradigm changed in the 21st century?

Gallstone disease is common and costly, creating over 700,000 cholecystectomies annually. Its complications consume approximately $6.5 billion in the United States. Surveys using noninvasive ultrasonography have identified its true prevalence and the associated risk factors. In developed countries, at least 10% of white adults harbor cholesterol gallstones; women have twice the risk, and age further increases the prevalence in both sexes. Gallstones reach epidemic proportions in the North and South American Indian populations, accompanied by an increased risk for gallbladder cancer. In contrast, the rate in sub-Saharan Africa and Asia is quite low. Obesity, a major risk factor, likely relates to insulin resistance (the metabolic syndrome). Evolution and circumstance in American Indians may have ironically selected those with "thrifty" genes that conserve energy. Our abundant access to food places us at the increased risk of obesity and cholelithiasis. The general rise in obesity in many countries raises the specter of heightened disease, best identified by epidemiologic studies.

Epidemiology and risk factors for gallstone disease: has the paradigm changed in the 21st century?

Gallstone disease is common and costly, creating over 700,000 cholecystectomies annually. Its complications consume approximately $6.5 billion in the United States. Surveys using noninvasive ultrasonography have identified its true prevalence and the associated risk factors. In developed countries, at least 10% of white adults harbor cholesterol gallstones; women have twice the risk, and age further increases the prevalence in both sexes. Gallstones reach epidemic proportions in the North and South American Indian populations, accompanied by an increased risk for gallbladder cancer. In contrast, the rate in sub-Saharan Africa and Asia is quite low. Obesity, a major risk factor, likely relates to insulin resistance (the metabolic syndrome). Evolution and circumstance in American Indians may have ironically selected those with "thrifty" genes that conserve energy. Our abundant access to food places us at the increased risk of obesity and cholelithiasis. The general rise in obesity in many countries raises the specter of heightened disease, best identified by epidemiologic studies.