What do systematic reviews say?

Drainage vs no drainage after open appendectomy

Drainage may leads to higher morbidity compared with no drainage after open appendectomy (low certainty).

• Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis 2021 · Cochrane Headline outcomes only
  RR 6.67 [2.13, 20.87]
  1 study · 90 participants
  Low