Skip to main content

Table 1 Distribution of independent variables by hospital and urgency of open cholecystectomy

From: Emergency open cholecystectomy is associated with markedly lower incidence of postoperative nausea and vomiting (PONV) than elective open cholecystectomy: a retrospective cohort study

  Hospital
  CRH UHWI
  Emerg Elect Emerg Elect
Number of cases 41 150 50 25
Age- Mean(Range) 49.1(8-81) 43.7(20-78) 42.7(20-82) 47(20-81)
Sex- No.(%) female 35(85.4%) 136(90.7%) 46(92%) 21(84%)
Current non-smoker- No.(%) 39(95.1%) 144(96%) 48(96%) 21(84%)
Systemic illness- No.(%) 24(58.5%) 65(43.3%) 20(40%) 12(48%)
Estimated BMI- No. obese(%) 20(48.8%) 70(46.7%) 28(56%) 14(56%)
NG Tube- No.(%) 36(87.8%) 113(75.3%) 40(80%) 5(20%)
Premedication- No.(%) 9(22%) 129(86%) 2(4%) 9(36%)
PONV Proph- No.(%) 7(17.1%) 23(15.3%) 48(96%) 24(96%)
Induct. with Propofol- No.(%) 10(24.4%) 11(7.3%) 26(52%) 18(72%)
Relaxant (Sux)- No.(%) 25(61%) 52(34.7%) 29(58%) 0(0%)
Halothane- No.(%) 38(92.7%) 148(98.7%) 46(92%) 21(84%)
Reversal- No.(%) 31(75.6%) 107(71.3%) 42(84%) 14(56%)
Duration anesth- Mean(range) 1.56(0.5-6.17) 1.47(0.75-3.58) 2.31(0.92-4.25) 1.81(0.92-2.92)
Antibiotic- No.(%) 40(97.6%) 135(90%) 49(98%) 17(68%)
Total opioid- Mean(range) 240(30-500) 182(50-400) 329(140-600) 358(175-610)
Time to first oral intake-
Mean/(range)
36.54(10.5-240) 24.95(7-68) 37.53(6.75-96) 23.6(3.75-47)
Vomit < 72 hours pre-surgery
- No.(%)
32(78.1%) 0(0%) 41(82%) 0(0%)
Opioid < 72 hrs pre-surgery
(excludes pre-med)- No. (%)
11(26.8%) 0(0%) 12(24%) 0(0%)
  1. Current non-smoker = never smoked or stopped more than 6 months earlier.
  2. Obese = estimated BMI ≥ 30.
  3. Ponv proph = PONV prophylaxis. No patient received PONV prophylaxis in the conventional way. The group reported here received dimenhydrinate 25-50 mg with each dose of opioid.
  4. All patients received a non-depolarizing muscle relaxant but the group referred to here also received a dose of the depolarizing relaxant succinylcholine.
  5. Most patients received the volatile inhalation agent Halothane, as shown here. The others received isoflurane or sevoflurane.
  6. Reversal was with neostigmine and atropine.
  7. All times are in hours.
  8. Total opioid dosage from immediately preoperative to 24 hours postoperative is expressed in meperidine equivalency units in milligrams, where fentanyl 100 μgms = meperidine 100 mgs = morphine 10 mgs.