Robotic Liver Surgery Reduces Open Conversion Risk and Blood Loss in Hepatic Resection, Suggests Meta-Analysis

While traditional LLR has historically demonstrated equivalent oncological efficacy to open surgery, this technique is frequently restricted by limited instrument maneuverability and two-dimensional visualization in complex anatomical fields; moreover, existing clinical comparisons with newer RLR platforms remain clouded by population heterogeneity and varied institutional protocols. To address this clinical gap, Dr. Rohith Kodali from the All India Institute of Medical Sciences, Mangalagiri, India, and an international team aimed to systematically analyze the literature to compare the safety, perioperative results, and short-term morbidity of these two minimally invasive liver resection (MILR) modalities.

Therefore, the PROSPERO-registered meta-analysis evaluated 29 cohort studies comparing 5,025 laparoscopic and 2,653 robotic liver resections across 7,678 patients. Using robust statistical models, the study assessed key safety, oncological, and recovery outcomes to deliver high-quality comparative evidence.

Key Clinical Findings of the Review Includes:

• Reduced Conversion Risk: The meta-analysis revealed LLR carried a significantly higher risk of conversion to open surgery compared to RLR (risk ratio = 1.83; 95% confidence interval [CI], 1.28–2.61; P = 0.0009).

• Decreased Blood Loss: The meta-analysis demonstrated LLR had significantly higher intraoperative blood loss than RLR, presenting a mean difference of 68.22 mL (95% CI, 38.05–98.38; P < 0.0001).

• Shorter Operating Times: The meta-analysis showed LLR achieved faster surgeries, with a mean difference of 20.95 minutes shorter operative time (95% CI, −40.53 to −1.38; P = 0.036).

• Equivalent Oncological Adequacy: The meta-analysis confirmed LLR and RLR achieved highly comparable R0 margin-negative resection rates (risk ratio = 0.99; 95% CI, 0.96–1.01; P = 0.32).

• Similar Postoperative Recovery: The meta-analysis reported no statistical differences in overall postoperative complications (risk ratio = 1.02; P = 0.81) or length of stay (mean difference = 0.01 days; P = 0.94) between LLR and RLR.

The results suggest that LLR and RLR yield highly comparable short-term oncological and safety profiles in patients undergoing hepatic resection. However, based on pooled data from 7,678 patients, the robotic platform offers crucial advantages in minimizing conversion to open surgery and reducing intraoperative blood loss, although these benefits must be balanced against a longer operative duration.

Thus, the review concludes that healthcare providers may consider utilizing RLR particularly for anatomically challenging cases, to benefit from its enhanced maneuverability and lower conversion risk, while recognizing that overall oncological success remains heavily dependent on patient selection and surgeon experience.

While the present analysis is restricted by the retrospective nature of most included trials and a lack of long-term survival data, these findings underscore the necessity for future large-scale, prospective randomized controlled trials to more clearly define the cost-effectiveness and long-term oncological equivalence of robotic liver resections.

Reference

Kodali R, Cherukuri AM, Theakarajan R, Velineni B, Alumula RR, Mallipeddi PS, et al. Minimally invasive liver surgery for malignancy: A systematic review and meta-analysis comparing robotic and laparoscopic approaches. Journal of Minimal Access Surgery. 2026.