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Table 3 Overall conversion rate and reasons for conversion

From: The HAC trial (harmonic for acute cholecystitis): a randomized, double-blind, controlled trial comparing the use of harmonic scalpel to monopolar diathermy for laparoscopic cholecystectomy in cases of acute cholecystitis

  H-mediated VLC MD-mediated VLC
  (21 patients) (21 patients)
Overall conversion rate 1 7
Distortion of Calots triangle anatomy 1 2
Excessive bleeding - 3
Time of surgery exceeding two hours - 2