• Shogo Tanaka, Kanji Ishihara, Takahiro Uenishi, Ryoya Hashiba, Yukiko Kurashima, Kohichi Ohno, Sayaka Tanaka, Masahiko Ohsawa, and Takatsugu Yamamoto.
• Department of Surgery, Ishikiriseiki Hospital, Higashiosaka City, Japan. m8827074@msic.med.osaka-cu.ac.jp
• Osaka City Med J. 2013 Jun 1;59(1):1-7.

BackgroundComplicated appendicitis (gangrenous or perforated appendicitis) is a risk for postoperative intraabdominal abscess, but management of intraabdominal abscess may differ between laparoscopic and open appendectomy.MethodsWe reviewed 67 patients who underwent appendectomy for complicated appendicitis, including 26 who received laparoscopic appendectomy (LA group) and 41 who underwent open appendectomy (OA group). The operation was performed under general anesthesia in all 26 patients in the LA group and in 10 (24%) in the OA group. Patient characteristics, operative factors, and postoperative complications (especially postoperative intraabdominal abscess) were compared between the two groups. Management of postoperative intraabdominal abscess was also investigated.ResultsPostoperative intraabdominal abscess occurred in 3 patients (12%) in the LA group and in 10 (24%) in the OA group (p = 0.23). All 3 patients in the LA group were treated conservatively. Of the 10 patients in the OA group, 6 were treated conservatively, but 4 needed a reoperation, including 3 who had undergone right pararectal skin incision under spinal analgesia and in whom sufficient irrigation was not possible because anesthesia had worn off.ConclusionsOur results suggest that insertion of abdominal drainage may be appropriate treatment for intraabdominal abscess after laparoscopic appendectomy. Light anesthesia may induce residual abscess in open appendectomy performed under spinal analgesia.

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