USRA - Peripheral Nerve Block

Median Nerve in the Elbow Region

Anatomical Correlation

BA = brachial artery
H = humerus

M = median nerve

	Pre-injection Scan Arrowhead = median nerve BA = brachial artery
	Post-injection Scan Arrowhead = median nerve BA = brachial artery LA = local anesthetic around the nerve

Median Nerve in the Forearm

Anatomical Correlation

	RA = radial artery N = median nerve
	FCR = flexor carpi radialis FDP = flexor digitorum profundus tendon FDS = flexor digitorum superficialis FPL = flexor pollicis longus PL = palmaris longus

Median Nerve in the Wrist

Anatomical Correlation

	FCR = flexor carpi radialis tendon FDS = flexor digitorum superficialis tendon FPL = flexor pollicis longus tendon
	Arrowhead = median nerve FCR = flexor carpi radialis tendon FDP = flexor digitorum profundus tendon FDS = flexor digitorum superficialis tendon FPL = flexor pollicis longus tendon

Selected References

Russon K, Blanco R: Accidental intraneural injection into the musculocutaneous nerve visualized with ultrasound. Anesth.Analg. 2007; 105: 1504-5.
Orebaugh SL, Pennington S: Variant location of the musculocutaneous nerve during axillary nerve block. J.Clin.Anesth. 2006; 18: 541-4.
Liebmann O, Price D, Mills C, Gardner R, Wang R, Wilson S, Gray A: Feasibility of forearm ultrasonography-guided nerve blocks of the radial, ulnar, and median nerves for hand procedures in the emergency department. Ann.Emerg.Med. 2006; 48: 558-62.
Schafhalter-Zoppoth I, Gray AT: The musculocutaneous nerve: ultrasound appearance for peripheral nerve block. Reg Anesth.Pain Med. 2005; 30: 385-90.
Spence BC, Sites BD, Beach ML: Ultrasound-guided musculocutaneous nerve block: a description of a novel technique. Reg Anesth.Pain Med. 2005; 30: 198-201