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Meta-Analysis
. 2012 Sep 12;2012(9):CD005444.
doi: 10.1002/14651858.CD005444.pub3.

Pre-operative biliary drainage for obstructive jaundice

Yuan Fang  1 , Kurinchi Selvan Gurusamy, Qin Wang, Brian R Davidson, He Lin, Xiaodong Xie, Chaohua Wang
Affiliations
Meta-Analysis

Pre-operative biliary drainage for obstructive jaundice

Yuan Fang et al. Cochrane Database Syst Rev. .

Abstract

Background: Patients with obstructive jaundice have various pathophysiological changes that affect the liver, kidney, heart, and the immune system. There is considerable controversy as to whether temporary relief of biliary obstruction prior to major definitive surgery (pre-operative biliary drainage) is of any benefit to the patient.

Objectives: To assess the benefits and harms of pre-operative biliary drainage versus no pre-operative biliary drainage (direct surgery) in patients with obstructive jaundice (irrespective of a benign or malignant cause).

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

Selection criteria: We included all randomised clinical trials comparing biliary drainage followed by surgery versus direct surgery, performed for obstructive jaundice, irrespective of the sample size, language, and publication status.

Data collection and analysis: Two authors independently assessed trials for inclusion and extracted data. We calculated the risk ratio (RR), rate ratio (RaR), or mean difference (MD) with 95% confidence intervals (CI) based on the available patient analyses. We assessed the risk of bias (systematic overestimation of benefit or systematic underestimation of harm) with components of the Cochrane risk of bias tool. We assessed the risk of play of chance (random errors) with trial sequential analysis.

Main results: We included six trials with 520 patients comparing pre-operative biliary drainage (265 patients) versus no pre-operative biliary drainage (255 patients). Four trials used percutaneous transhepatic biliary drainage and two trials used endoscopic sphincterotomy and stenting as the method of pre-operative biliary drainage. The risk of bias was high in all trials. The proportion of patients with malignant obstruction varied between 60% and 100%. There was no significant difference in mortality (40/265, weighted proportion 14.9%) in the pre-operative biliary drainage group versus the direct surgery group (34/255, 13.3%) (RR 1.12; 95% CI 0.73 to 1.71; P = 0.60). The overall serious morbidity was higher in the pre-operative biliary drainage group (60 per 100 patients in the pre-operative biliary drainage group versus 26 per 100 patients in the direct surgery group) (RaR 1.66; 95% CI 1.28 to 2.16; P = 0.0002). The proportion of patients who developed serious morbidity was significantly higher in the pre-operative biliary drainage group (75/102, 73.5%) in the pre-operative biliary drainage group versus the direct surgery group (37/94, 37.4%) (P < 0.001). Quality of life was not reported in any of the trials. There was no significant difference in the length of hospital stay (2 trials, 271 patients; MD 4.87 days; 95% CI -1.28 to 11.02; P = 0.12) between the two groups. Trial sequential analysis showed that for mortality only a small proportion of the required information size had been obtained. There seemed to be no significant differences in the subgroup of trials assessing percutaneous compared to endoscopic drainage.

Authors' conclusions: There is currently not sufficient evidence to support or refute routine pre-operative biliary drainage for patients with obstructive jaundice. Pre-operative biliary drainage may increase the rate of serious adverse events. So, the safety of routine pre-operative biliary drainage has not been established. Pre-operative biliary drainage should not be used in patients undergoing surgery for obstructive jaundice outside randomised clinical trials.

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Conflict of interest statement

The authors who have been involved in this review have done so without any known conflicts of interest. They are not involved in any of the primary trials included in this systematic review.

Figures

1
1
Study flow diagram.
2
2
Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.
3
3
Risk of bias summary: review authors' judgements about each risk of bias item for each included study.
4
4
Trial sequential analysis of preoperative biliary drainage versus direct surgery for obstructive jaundice on mortality. The required information size of 11,130 patients was calculated based on a prevalence of death of 13% in the surgery group; a relative risk reduction of 20%; an alpha of 5%; and a beta of 20%. The cumulated Z‐curve shows that only a small proportion, that is 520 patients, of the required number of patients to demonstrate differences in mortality has been recruited in all the clinical trials comparing pre‐operative biliary drainage and direct surgery and that no statistical significant difference has been observed.
1.1
1.1. Analysis
Comparison 1 Pre‐operative biliary drainage versus direct surgery, Outcome 1 Mortality.
1.3
1.3. Analysis
Comparison 1 Pre‐operative biliary drainage versus direct surgery, Outcome 3 Serious morbidity.
1.5
1.5. Analysis
Comparison 1 Pre‐operative biliary drainage versus direct surgery, Outcome 5 Hospital stay (random‐effects).
2.1
2.1. Analysis
Comparison 2 Stratified by method of drainage, Outcome 1 Mortality.
2.2
2.2. Analysis
Comparison 2 Stratified by method of drainage, Outcome 2 Overall morbidity.
3.1
3.1. Analysis
Comparison 3 Stratified by proportion of patients with malignancy, Outcome 1 Mortality.
3.2
3.2. Analysis
Comparison 3 Stratified by proportion of patients with malignancy, Outcome 2 Overall morbidity.
4.1
4.1. Analysis
Comparison 4 Sensitivity analysis of overall morbidity, Outcome 1 Serious complications without Pitt 1985 (proximal obstruction).
4.2
4.2. Analysis
Comparison 4 Sensitivity analysis of overall morbidity, Outcome 2 Serious complications without Lai 1994 (severity of complications could not be assessed).
4.3
4.3. Analysis
Comparison 4 Sensitivity analysis of overall morbidity, Outcome 3 Serious complications without van der Gaag 2010 (no routine antibiotic prophylaxis).
4.4
4.4. Analysis
Comparison 4 Sensitivity analysis of overall morbidity, Outcome 4 Bile leak irrespective of treatment.
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Update of

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References to other published versions of this review

Wang 2008
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