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Background  Traditionally, perforated diverticulitis with purulent peritonitis was treated with resection and colostomy (Hartmann's procedure), with inherent complications and risk of a permanent stoma. The DILALA (DIverticulitis – LAparoscopic LAvage  versus  resection (Hartmann's procedure) for acute diverticulitis with peritonitis) and other randomized trials found laparoscopic lavage to be a feasible and safe alternative. The medium‐term follow‐up results of DILALA are reported here.    Methods  Patients were randomized during surgery after being diagnosed with Hinchey grade III perforated diverticulitis at diagnostic laparoscopy. The primary outcome was the proportion of patients with one or more secondary operations from 0 to 24 months after the index procedure in the laparoscopic lavage  versus  Hartmann's procedure groups. The trial was registered as ISRCTN82208287.    Results  Forty‐three patients were randomized to laparoscopic lavage and 40 to Hartmann's procedure. Patients in the lavage group had a 45 per cent reduced risk of undergoing one or more operations within 24 months (relative risk 0·55, 95 per cent c.i. 0·36 to 0·84;  P  = 0·012) and had fewer operations (ratio 0·51, 95 per cent c.i. 0·31 to 0·87;  P  = 0·024) compared with those in the Hartmann's group. No difference was found in mean number of readmissions (1·37  versus  1·50;  P  = 0·221) or mortality between patients randomized to laparoscopic lavage or Hartmann's procedure. Three patients in the lavage group and nine in the Hartmann's group had a colostomy at 24 months.    Conclusion  Laparoscopic lavage is a better option for perforated diverticulitis with purulent peritonitis than open resection and colostomy.

Two‐year results of the randomized clinical trial DILALA comparing laparoscopic lavage with resection as treatment for perforated diverticulitis