Comparative analysis of general anesthesia and ultrasound-guided intercostal nerve block in subcutaneous implantable cardioverter-defibrillator perioperative care

Table 2 Comparison of peri-operative safety between general anesthesia group and ultrasound-guided intercostal nerve block group (mean ± SD)

Items	General anesthesia group	Ultrasound-guided intercostal nerve block group	t value	P value
Number of cases	20	44
NRS (points)
Immediately after operation	1.82 ± 0.31	1.77 ± 0.33	0.682	0.501
1 hour after operation	1.72 ± 0.36	1.62 ± 0.39	1.085	0.281
6 hours after operation	1.62 ± 0.41	1.17 ± 0.56	3.883	< 0.001
12 hours after operation	1.02 ± 0.56	0.52 ± 0.46	3.387	0.001
24 hours after operation	0.72 ± 0.61	0.22 ± 0.36	4.285	< 0.001
48 hours after operation	0.42 ± 0.51	0.12 ± 0.26	3.187	0.002
72 hours after operation	0.16 ± 0.41	0 ± 0	2.183	0.033
Total hospital stays (day)	12.03 ± 4.03	7.53 ± 3.03	4.885	< 0.001
Average post operative hospital stays (day)	4.03 ± 2.03	2.33 ± 1.23	4.185	< 0.001
Operation time (minutes)	65.54 ± 15.25	45.09 ± 10.59	5.885	< 0.01
Time to first analgesia after operation (hour)	8.03 ± 1.83	22.03 ± 15.03	-3.585	0.001
Usage rate of analgesics (%)	43.75	7.89	9.59	0.02

NRS: Numeric rating scale.