Laparoscopic adhesiolysis: the advantage fades with time on the clock

Design

Single-centre retrospective cohort with propensity matching

Population

373 patients operated for adhesive SBO, 301 with previous abdominal surgery

Primary outcome

Postoperative complications, bowel recovery and length of stay

Effect

Conversion 15.8%; complications OR 1.40 per 15 min of operating; dense adhesions OR 2.29 after cancer surgery

A single-centre series reviewed 373 consecutive operations for adhesive small bowel obstruction between 2009 and 2024, focusing on the 301 patients with previous abdominal surgery. Laparoscopic and open adhesiolysis were compared with propensity matching.

When completed laparoscopically, the operation gave faster return of bowel function, fewer complications and shorter stay than open surgery. But 15.8% of laparoscopic attempts were converted, two-thirds of them for dense adhesions, and converted cases had complication rates similar to open surgery. Higher BMI (OR 1.15 per unit) and previous cancer surgery (OR 2.29) predicted dense adhesions, and each extra 15 minutes of operating raised the odds of complications (OR 1.40).

The message is not to avoid laparoscopy after previous surgery, but to set a threshold. A difficult laparoscopic dissection that drags on gives away the benefit it was chosen for.

This is retrospective work from one unit, so the numbers are a guide rather than a rule.

• Laparoscopic adhesiolysis remains a reasonable first approach for adhesive obstruction, even after previous laparotomy.
• Expect dense adhesions in patients with higher BMI or previous cancer surgery, and plan the approach accordingly.
• Agree a time or progress point at which to convert, rather than persisting with a slow laparoscopic dissection.
• Converted cases did about as well as primary open surgery in this series, so timely conversion is not a failure.
• Document the reason for conversion to support future case selection.

Why it matters

Operating time, not the approach alone, appears to decide whether laparoscopy helps after previous surgery.

Don't overread it

This was a retrospective single-centre series; the time thresholds have not been tested prospectively.

The statistics, in plain English

An odds ratio of 1.40 per 15 minutes means each quarter-hour of extra operating raises the odds of a complication by about 40%, compounding as time goes on.

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