Effects of laparoscopic cholecystectomy on lung function: A systematic review

Table 2 Description of the baseline characteristics for the articles selected from the second literature search

Ref.	Baseline characteristics
Johnson et al[44]	Preoperative and postoperative measurements 24 h after LC of VC, FRC, arterial PO2 and chest-X-ray atelectasis.
Poulin et al[45]	Postoperative values of FVC and FEV1 variables measured on the first day after LC compared with values of the respective pulmonary function indices recorded on the first day after upper abdominal surgery and cholecystectomy.
Schulze et al[43]	Assessments of pain scores, peak flow values and subjective feeling of fatigue preoperatively, 6 h postoperatively and daily during the first week after operation for patients having undergone LC
Schauer et al[40]	Comparative measurements for FVC, FEV1, FEF25%-75%, Tiffenneau Index, FEFMAX, total lung capacity and oxygen saturation preoperatively to ten days after surgery between LC and OC
Saunders et al[41]	Measurements of FVC and the potential emergence of respiratory and gastrointestinal disturbances preoperatively to the first postoperative day between LC and OC
Torrington et al[42]	Comparative evaluations for FVC and FEV1 and arterial blood gases between LC and OC preoperatively and 24 h after surgery
Chumillas et al[34]	Comparative examination for FVC, FEV1 and arterial oxygenation values between LC and OC, from preoperatively up to 48 h after surgery
Hasukić et al[46]	Comparative measurements for FVC, FEV1, FEF25%-75% and arterial oxygenation preoperatively and 24 h after LC (included in the statistical analysis)

VC: Vital capacity (L); FRC: Functional residual capacity (L); FVC: Forced vital capacity (L); FEV₁: Forced expiratory volume in one second (L); FEF_25%-75%: Maximal-mid expiratory flow rate (L/s); FEF_MAX: Maximal forced expiratory flow (L/s); LC: Laparoscopic cholecystectomy; OC: Open cholecystectomy.