Clinical study on the efficacy of laparoscopic hepatectomy via the retroperitoneal approach for treating liver tumors

Table 1 Clinical data of the patients and tumor characteristics, n (%)

Variables	n (%)
Sex (male)	34 (47)
Age (years, mean ± SD)	45 (34-72)
BMI (kg/m², mean ± SD)	23.14 ± 3.27
Child-Pugh classification
Child-Pugh A	67 (93)
Child-Pugh B	5 (7)
Past medical history
Liver cirrhosis	20 (28)
History of lung surgery	10 (14)
Benign liver diseases
Hemangioma	16 (22)
FNH	4 (6)
Hepatolithiasis	1 (1)
Malignant liver tumors
HCC	45 (63)
CRLM	6 (8)
Tumor diameter (cm)	7.5 ± 3.4
Anatomical location
S6	30 (42)
S7	27 (38)
S8	15 (20)

BMI: Body mass index; FNH: Focal nodular hyperplasia; HCC: Hepatocellular carcinoma; CRLM: Colorectal liver metastases.

Table 2 Perioperative-related indicators

Variables	mean ± SD/n (%)
Operative time (minutes)	140 ± 30
Intraoperative blood loss (mL)	150 ± 46
Conversion to open surgery	10 (13.8)
Postoperative complications
Atelectasis and pleural effusion	15
Ascites	2
Postoperative length of stay (days)	8.3 ± 5.3

Table 3 Surgical outcomes

Times	mean ± SD
Preoperative AST	25.52 ± 4.23
Preoperative ALT	27.00 ± 11.42
Postoperative day 1 AST	124.35 ± 29.35
Postoperative day 1 ALT	109.00 ± 32.75
Postoperative day 3 AST	57.89 ± 19.55
Postoperative day 3 ALT	55.00 ± 21.75

AST: Aspartate transaminase; ALT: Alanine transaminase.