Ultrasound-guided quadratus lumborum block with general anesthesia for perioperative circulatory stability in colorectal cancer surgery

Table 4 Variations in renal function indicators, mean ± SD

Time point	Group	CRE (μmol/L)	P value	BUN (mmol/L)	P value	UA (μmol/L)	P value
Before surgery	Experiment group (n = 58)	74.50 ± 11.32	0.746	5.22 ± 1.03	0.61	312.40 ± 45.21	0.765
	Control group (n = 58)	75.11 ± 10.87		5.31 ± 1.14		311.20 ± 42.54
1 day after surgery	Experiment group (n = 58)	85.32 ± 12.40	0.051	6.80 ± 1.22	0.14	327.50 ± 50.32	0.135
	Control group (n = 58)	79.90 ± 13.14		6.32 ± 1.31		315.42 ± 48.22
3 days after surgery	Experiment group (n = 58)	91.55 ± 10.67	0.004	7.15 ± 1.52	0.034	340.45 ± 47.65	0.015
	Control group (n = 58)	82.44 ± 11.23		6.55 ± 1.44		320.10 ± 44.32
7 days after surgery	Experiment group (n = 58)	78.42 ± 9.80	0.101	5.88 ± 1.10	0.073	312.87 ± 42.13	0.233
	Control group (n = 58)	75.88 ± 10.01		5.56 ± 1.24		305.34 ± 40.54

CRE: Creatinine; BUN: Blood urea nitrogen; UA: Uric acid.