Recently, techniques using fine-caliber instruments (2 or 3 mm in diameter) for laparoscopic cholecystectomy, called minilaparoscopic cholecystectomy (MLC), were reported to be superior to conventional LC (CLC, using 5 mm instruments) in postoperative course and cosmetic outcome. However, the use of MLC to date has been largely restricted to uncomplicated situations. Since CLC has been proved to be a safe and efficient technique for acute cholecystitis especially if conducted early, this study tests the feasibility and safety of MLC for acute cholecystitis.

Sixty-nine consecutive patients with acute cholecystitis were prospectively randomized to minilaparoscopic (n = 38) or conventional laparoscopic (n = 31) cholecystectomy, and the operations were conducted within 2 days of admission whenever possible. Despite different operative techniques, both groups of patients received identical preoperative preparation, evaluation and postoperative care. The two groups were compared for patient characteristics, results of laboratory tests, predictive score for LC difficulties, operative time, operative complications, hospitalization days and need for meperidine injection for wound pain.

The conversion rate was 7.9% (3 of 38) for the MLC group and 6.5% (2 of 31) for the CLC group. Nine patients in the MLC group and 7 in the CLC group had concomitant choledocholithiasis and underwent endoscopic stone retrieval before operation. The age, sex, predictive score for LC difficulties, preoperative leukocyte count, length of hospital stay and requirement of intramuscular meperidine injections were similar for both groups of patients, while, the operative times were marginally longer in the MLC group (113.8 ± 30.8 versus 98.2 ± 33.2 minutes, P = 0.056). No major complications occurred in either group.

The results of cholecystectomy for acute cholecystitis by MLC are as good as those of CLC if the operation is performed early, with obvious smaller incisions and minimal complications. MLC is a safe and effective procedure for patients with acute cholecystitis, and has an acceptable low conversion rate.