Nervous lesions as neurologic complications in regional anaesthesiologic block: an experimental model.
The purpose of the study was to evaluate the lesions produced by direct trauma of injection needles in the peripheral nervous trunks. Two types of needles were compared: one with a tip with a 45 degrees inclination, and one with a tip with a 14 degrees in clination. Sprague Dawley rats were used, the sciatic nerve of which had been subjected to repeated injections under direct vision; the results were collected 7, 14, and 21 days after surgery. Both macroscopic and histological observation revealed that the greatest injury was produced using needles that had a tip with a 14 degrees inclination, that was longer, while needles that had a tip with a 45 degrees inclination had a greater tendency to slip and rotate at every attempt at penetration.
Macías
G
G
Reparto Ortopedia e Traumatologia, Ospedale Cosme Argerich, Buenos Aires, Argentina.
Razza
F
F
Peretti
G M
GM
Papini Zorli
I
I
D000818:Animals; D005260:Female; D009339:Needles; D009407:Nerve Block / Q000379:methods; D059348:Peripheral Nerve Injuries; D051381:Rats; D017207:Rats, Sprague-Dawley