Comparison of Continuous and Programmed Intermittent Bolus Infusion of 0.2% Ropivacaine after Ultrasound-Guided Continuous Interscalene Brachial Plexus Block in Arthroscopic Shoulder Surgery

Table 3

Motor block scores using a modified Bromage scale (MBS) analgesic at 0, 24, and 48 h after the surgery.

Time (h)	MBS	Group A (n = 28)	Group B (n = 29)	value
0	Grade 0	18 (64.3)	12 (41.4)	0.221
	Grade 1	9 (32.1)	15 (51.7)
	Grade 2	1 (3.6)	2 (6.9)
24	Grade 0	24 (85.7)	17 (58.6)	0.038
	Grade 1	4 (14.3)	12 (41.4)
48	Grade 0	26 (92.9)	27 (93.1)	1.000
	Grade 1	2 (7.1)	2 (6.9)

All measured values are presented as the number of patients (%).  < 0.05 0 h: immediately after admission to the PACU. Grade 0: able to raise the extended arm to 90° for 2 s. Grade 1: able to flex the elbow and move the fingers but unable to raise the extended arm. Grade 2: unable to flex the elbow but able to move the fingers. Grade 3: unable to move the arm, elbow, or fingers.