Modificações do fixador externo para osteossíntese umeral em pombos domésticos

Abstract

RESUMO Este trabalho objetivou avaliar duas modificações no fixador externo para osteossíntese umeral em pombos. Após realização de fratura umeral diafisária, esta foi reduzida com um pino intramedular e outro perpendicular, inserido no segmento distal (Grupo INTRODUÇÃODentre as várias doenças que acometem as aves, estão os cistos de penas, as neoplasias cutâneas, a retenção de ovos e as unhas alongadas. Porém, as fraturas de ossos longos das asas e dos membros pélvicos estão entre as mais freqüentes (WILLIAMS et al., 1987). A maioria dessas fraturas ocorre na diáfise e na epífise distal devido à pouca cobertura muscular. A cortical fina e o canal medular grande associados à tração do músculo peitoral são fatores que provocam fraturas cominutivas, cuja redução é difícil. O alto

External fixation to correct tarsal-metatarsal fracture in rock pigeon (Columba livia)

“…The antibiotic used (enrofloxacin) and the dose calculated by allometric extrapolation were efficient, avoiding postoperative infections, as observed by other authors (Leotte et al, 2004;Alievi et al, 2001;Gaiga & Schossler, 2002;Dalmolin et al, 2007;Rocha et al, 2009). Some other studies have reported positive use of ampicillin (Alievi et al, 2008).…”

“…During this period, animal had use of limb, which meets citations that radiographic consolidation happens later than clinical use of the limb (Williams et al, 1987;Wissman, 1999;Alievi et al, 2001). This supports findings that external fixators allow adequate movement of joints proximal and distal to the fracture, avoiding complications of non-use of the limb during bone healing (Pead & Cardmichael, 1989;Dalmolin et al, 2007).…”

“…Research conducted previously with pigeons has presented a minimum adaptation period of 15 days for adjustment of diet, environment, and handling (Alievi et al, 2001;Gaiga & Schossler, 2002;Leotte et al, 2004;Dalmolin et al, 2007). In this case, however, this time is doubled as observed before.…”

“…An angle of 30-40° between pins placed in each base of fragment has been suggested as the best way to join the bone. In this case, pins are placed perpendicularly across the bone, considering the pins as individual units, without considering the stiffness of external skeletal fixation, which has also been successfully reported in literature (Dernell et al, 1993;Degernes et al, 1998;Dalmolin et al, 2007;Pérez et al, 2008).…”

“…In 27.77% of animals, oblique fractures occurred in osteotomy due to very thin cortex in this species (West et al, 1996). In this report, manual movements were used and problems related to lack of dense bone in metaphysis and presence of thin bone trabeculae along the length of bone, such as migration of the pin and rotational instability of fracture, were avoided due to the presence of perpendicular pins, which prevented the occurrence of such setbacks, as indicated by other authors (Kingsley, 1983;Dalmolin et al, 2007;Rahal et al, 2008). Anesthetic protocol was satisfactory, as reported for birds (Coles, 2007;Sá et al, 2012).…”