Preperitoneal robotic hernia approaches edged out intraperitoneal mesh

Design

Systematic review and network meta-analysis; CINeMA certainty rating

Population

9,348 adults undergoing robotic ventral or incisional hernia repair

Primary outcome

Complications, seroma, surgical site infection, length of stay, recurrence

Effect

Retromuscular vs intraperitoneal mesh: overall complications risk ratio 0.23 (0.07 to 0.74); low certainty

A network meta-analysis brought together 14 studies — 2 randomised trials and 12 retrospective cohorts, 9,348 adults — to rank robotic ventral and incisional hernia techniques by mesh plane and access.

Against robotic intraperitoneal onlay mesh, preperitoneal and retromuscular approaches generally came out ahead on early outcomes. Robotic extended-view totally extraperitoneal retromuscular repair had lower overall complications (risk ratio 0.23, 95% CI 0.07 to 0.74), fewer seromas and a shorter stay, though more postoperative pain; robotic transabdominal preperitoneal repair also lowered complications and surgical site infection. Pooled preperitoneal approaches showed lower short-term recurrence and readmission.

The signal points away from intraperitoneal mesh towards preperitoneal and retromuscular planes where the expertise and platform are available. The caveat is substantial: certainty was mostly low or very low, and the comparisons rest largely on retrospective data.

• Network meta-analysis of 14 studies (2 randomised trials, 12 cohorts), 9,348 adults.
• Retromuscular repair had lower overall complications than intraperitoneal mesh (risk ratio 0.23, 95% CI 0.07 to 0.74) but more postoperative pain.
• Transabdominal preperitoneal repair lowered complications and surgical site infection.
• Pooled preperitoneal approaches showed lower short-term recurrence and 30-day readmission.
• Certainty was mostly low or very low, so treat the ranking as provisional.

Why it matters

It gives a comparative steer between robotic hernia techniques that have been adopted faster than they have been compared.

Don't overread it

Certainty was mostly low or very low and most data were retrospective, so the rankings are provisional, not a basis to abandon a technique that works in your hands.

The statistics, in plain English

A risk ratio of 0.23 looks dramatic, but a wide interval and low certainty — mostly retrospective data — mean the true benefit could be much smaller; network comparisons also lean on indirect evidence between techniques rarely compared head to head.

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