Effect of local anesthetic concentration, dose and volume on the duration of single-injection ultrasound-guided axillary brachial plexus block with mepivacaine: a randomized controlled trial

Table 3 Duration of axillary plexus nerve block

	Group A (n = 15)	Group B (n = 15)	Group C (n = 15)	p-value
Block duration (min)
Overall sensory	256 (230 – 282)	226 (209 – 243)	270 (248 – 291)	0.012
Overall motor	254 (226 – 282)	220 (200 – 240)	264 (244 – 284)	0.016
Block duration (min)
Med. Anteb. Cut. nerve
Sensory	222 (201 – 242)	197 (174–220)	247 (221 – 273)	0.010
Musculocutaneous nerve
Sensory	213 (191 – 235)	196 (175 – 217)	215 (186 – 244)	0.446
Motor	224 (206 – 242)	188 (164 – 212)	216 (197 – 236)	0.031
Radial nerve
Sensory	228 (197 – 259)	207 (190 – 223)	227 (191 – 164)	0.328^a
Motor	229 (206 – 251)	209 (190 – 229)	258 (238 – 277)	0.003
Median nerve
Sensory	236 (211 – 261)	204 (185 – 223)	248 (224 – 272)	0.015
Motor	245 (214 – 275)	200 (175 – 225)	241 (222 – 259)	0.015 ^b
Ulnar nerve
Sensory	238 (211 – 265)	211 (189 – 233)	249 (220 – 278)	0.087
Motor	243 (211 – 274)	209 (185 – 234)	257 (236 – 279)	0.025

Group A: 20 mL mepivacaine 1.5 %; Group B: 30 mL mepivacaine 1.0 %; Group C: 30 mL mepivacaïne 1.5 %; med. anteb. cut. nerve: medial antebrachial cutaneous nerve. ^ano data because of a postoperative cast or bandage in 6 patients in Group A, 5 patients in Group B and 8 patients in Group C. ^bno data because of a postoperative cast or bandage in 3 patients in group A, 2 patients in Group B and 2 patients in Group C. Values are mean (95 % CI)
Bold data represent statistically significant differences

ISSN: 1471-2253