Figure 1
From: Three-port versus four-port laparoscopic cholecystectomy in acute and chronic cholecystitis
pethidine requirement. The Bar chart shows the percent of patients received pethidine (mg) in the first 48 hours after surgery. The black bars represent three-port LC patients while the grey bars represent four-port group, means are 167.23 mg and 210.73 mg respectively p = 0.0001.