The Safety and Efficacy of Approaches to Liver Resection: A Meta-Analysis
Level 3 - non-randomized controlled study
Systematic review and meta-analysis of comparative observational studies
OpenAlex W1993001535 · doi:10.4293/jsls.2014.00186
What was done
A systematic review and meta-analysis of PubMed and Embase was conducted to compare open laparotomy, laparoscopic, and robotic hepatectomy. Comparative studies reporting operative time, estimated blood loss, length of stay, resection margins, postoperative complications, perioperative mortality, and costs were included. Random-effects models pooled mean net differences and relative risks across 49 studies encompassing 3,702 patients (1,901 laparoscopic, 1,741 open, and 60 robotic).
What was found
No significant differences were identified among groups in total operative times, surgical margins, or perioperative mortality rates, nor between laparoscopic and robotic approaches across all outcomes. Compared to minimally invasive approaches, open laparotomy had: - Greater estimated blood loss (pooled mean net change: 152.0 mL; 95% CI: 103.3 to 200.8 mL) - Longer length of hospital stay (pooled mean difference: 2.22 days; 95% CI: 1.78 to 2.66 days) - Higher total complication rate (odds ratio: 0.50; 95% CI: 0.42 to 0.57, favoring minimally invasive surgery)
Why it matters
This analysis confirms that minimally invasive hepatectomy achieves equivalent margin safety and perioperative survival to open surgery while significantly reducing morbidity and recovery time. It also demonstrates that robotic liver resection provided no proven clinical advantage over standard laparoscopic techniques.
Limits
The robotic cohort was tiny (60 patients, 1.62% of the sample), severely limiting statistical power for robotic comparisons. The primary studies are largely non-randomized observational series subject to baseline selection bias (e.g., reserving open surgery for larger or more complex tumors). Cost data mentioned in the methods were not reported with numerical values in the abstract.
Cited by
- supports The da Vinci robotic surgical system enables laparoscopic surgery that can reduce blood loss in procedures such as liver surgery compared to traditional open surgery.