Abstract
Hepatic pedicle clamping (HPC) has been demonstrated to be effective for short-term outcomes during hepatic resection. However, HPC-induced hepatic ischemia/reperfusion injury can accelerate the outgrowth of hepatic micrometastases in experimental studies. The conclusive evidence regarding effects of HPC on long-term patient outcomes after hepatic resection for colorectal liver metastasis (CRLM) has not been determined. A comprehensive electronic literature search was performed to identify studies evaluating the oncological effects of HPC after hepatic resection for CRLM. The main outcome measures were intrahepatic recurrence (IHR), disease-free survival (DFS), and overall survival (OS). A meta-analysis was performed using the random-effects models to compute odds ratio (OR) along with 95% confidence intervals (CI). Four studies, with a total of 2,114 patients (73.7% HPC, 26.3% non-HPC), matched the inclusion criteria. Meta-analyses revealed that IHR (OR 0.88; 95% CI 0.69-1.11; P = 0.27), DFS (OR 0.88; 95% CI 0.70-1.10; P = 0.27) and OS (OR 0.99; 95% CI 0.79-1.24; P = 0.90) did not differ significantly between the HPC and non-HPC groups. This meta-analysis provides persuasive evidence that HPC during hepatic resection for CRLM has no significant adverse oncological outcomes. HPC should be considered an option during parenchymal liver resection from current available evidence.
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