Prognostic factors and time-related changes influence results of colorectal liver metastases surgical treatment: A single-center analysis

Table 2 Operative characteristics of the patients n (%)

Characteristics
Intraoperative ultrasonography	92%
Number of metastases (median, range)	2 (0-15)
Extrahepatic invasion	38 (16.1)
Type of resection
Major hepatectomy	51 (21.6)
Minor hepatectomy	66 (28)
Atypical hepatectomy	36 (15.3)
Combined hepatectomy	36 (15.3)
No resection	47 (19.9)
Resection of extrahepatic disease	18 (7.5)
Peritoneal disease	4
Diaphragmatic invasion	4
Local disease (colon/rectum)	4
Hilar lymph node invasion	3
Inferior vena cava invasion	2
Splenectomy	1
Additional procedure	159 (72)
Blood loss (mL) (median, range)	370 (0-2500)
Vascular inflow exclusion	56.8%
Vascular exclusion time (min)	33 (4-128)
Need of transfusion	82 (36.8)
Surgery time (min)	220 (30-420)