Robotic TME was linked to more restorative resections than laparoscopy

Design

Systematic review and meta-analysis of 20 studies

Population

7,133 patients having total mesorectal excision for rectal cancer

Primary outcome

Restorative resection with primary anastomosis

Effect

OR 1.43 (95% CI 1.04–1.98); post-2020 OR 2.86 (1.80–4.53); conversion OR 0.37 (0.28–0.49)

This systematic review and meta-analysis pooled 20 studies with 7,133 patients having robot-assisted or laparoscopic total mesorectal excision for rectal cancer. The question was whether the robot makes a primary anastomosis, rather than a permanent stoma, more achievable.

Robotic surgery was associated with higher odds of a restorative resection, and the association was stronger in studies of patients treated after 2020. Conversion to open surgery was much less frequent. Anastomotic leak, complications, reoperation and readmission did not differ.

The obvious explanation is better access in a narrow pelvis, plus growing robotic experience. But most included studies were not randomised, and surgeons may choose the robot for patients they already expect to restore, or choose a stoma for frailer patients.

For units deciding on robotic rectal surgery, this is supportive rather than decisive. Whether more anastomoses translate into better bowel function and quality of life is not yet known, and low anterior resection syndrome is the cost of some restorations.

• Consider robotic TME where available for low rectal cancers where restoration is in doubt.
• Counsel patients on low anterior resection syndrome before choosing restoration over a stoma.
• Expect fewer conversions with the robot; leak rates were similar.
• Audit your own restoration and leak rates if introducing robotic rectal surgery.

Why it matters

It suggests the robot's main benefit in rectal surgery may be fewer permanent stomas rather than fewer complications.

Don't overread it

Mostly observational studies; selection of patients for the robot could explain part of the difference.

The statistics, in plain English

An odds ratio of 1.43 means the odds of a restorative resection were about 40% higher with the robot. Its interval (1.04 to 1.98) only just clears 1.0. The stronger post-2020 subgroup result (2.86) is weaker evidence than the headline because it rests on fewer studies and was not the primary comparison.

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