Operating for adhesive obstruction: fewer recurrences, more early harm

Design

Systematic review and meta-analysis, 42 observational studies and 3 randomised trials

Population

205,717 adults and children with adhesive small bowel obstruction

Primary outcome

In-hospital mortality, complications, stay, 5-year recurrence and reoperation

Effect

Recurrence OR 0.41 (0.30–0.56); mortality OR 1.87 (1.21–2.89); very low to low certainty

This meta-analysis pooled 45 studies, mostly retrospective with only three randomised trials, covering 205,717 adults and children with adhesive small bowel obstruction treated with surgery or conservatively.

Surgery was associated with higher in-hospital mortality (OR 1.87, 95% CI 1.21 to 2.89), far more complications (OR 5.33) and about four days longer stay, but with fewer recurrences at five years (OR 0.41, 0.30 to 0.56). Five-year reoperation did not differ. Certainty was low or very low for every outcome and heterogeneity was high.

The early-harm findings are badly confounded: patients went to theatre because they were sicker, failed conservative treatment or had strangulation. What survives is the trade-off itself — an operation may buy fewer recurrences — which is worth having in mind when counselling someone on their third admission.

• Do not read the higher mortality with surgery as a reason to delay operating on a patient who needs it.
• Discuss the lower recurrence risk with surgery when a patient has repeated admissions for adhesive obstruction.
• Water-soluble contrast helps predict which patients will settle without operation.
• Record the number of previous episodes — it shapes the case for elective adhesiolysis.

Why it matters

It frames the decision for recurrent obstruction as early risk against future admissions.

Don't overread it

Mostly retrospective data with confounding by severity — the mortality difference does not show that surgery is more dangerous.

The statistics, in plain English

An odds ratio of 0.41 for recurrence means substantially lower odds of another episode after surgery. But 'very low certainty' means the true effects may be quite different, mainly because sicker patients were the ones operated on. Heterogeneity of 64–99% means the studies disagreed widely.

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