Bilateral thoracic paravertebral block combined with general anesthesia vs. general anesthesia for patients undergoing off-pump coronary artery bypass grafting: a feasibility study

Table 2 Comparison of VAS scores, rescue analgesia and morphine consumption between groups

Variable	Group	n	PCA 12 h	PCA 24 h	PCA 36 h	PCA 48 h
Rest pain	PVB + GA	29	3 [2, 3]	3 [2, 3]	3 [2, 3]	2 [2, 3]
	GA	30	3 [3, 3]	3 [3, 4]	3 [2, 4]	3 [3, 4]
	P		0.015	0.023	0.026	0.042
Cough pain	PVB + GA	29	3 [2, 3]	3 [2, 3]	3 [2, 3]	2 [2, 3]
	GA	30	3 [3, 3]	3 [3, 4]	3 [2, 4]	3 [3, 4]
	P		0.023	0.030	0.027	0.034
Rescue analgesia	PVB + GA	29	0 (0)	1 (3.4)	3 (10.3)	2 (6.9)
	GA	30	5 (16.7)	6 (20.0)	6 (20.0)	7 (23.3)
	P		0.034	0.049	0.302	0.079
Morphine consumption	PVB + GA	29	–	25.6 ± 7.3	–	47.6 ± 13.5
	GA	30	–	30.7 ± 9.0	–	54.3 ± 16.1
	P			0.033		0.041

VAS Visual analogue scale, PCA Patient-controlled analgesia, PVB Paravertebral block, GA General anesthesia

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