RESUMO
Nonunion of the tibia associated with bone loss, previous infection, obliteration of the intramedullary canal or located in the distal metaphysis poses a challenge to the surgeon and significant morbidity to patients. We retrospectively reviewed the records of 24 patients who were treated by central bone grafting and compared them to those of 20 who were treated with a traditional posterolateral graft. Central bone grafting entails a lateral approach, anterior to the fibula and interosseous membrane which is used to create a central space filled with cancellous iliac crest autograft. Upon consolidation, a tibiofibular synostosis is formed that is strong enough for weight-bearing. This procedure has advantages over other methods of treatment for selected nonunions. Of the 24 patients with central bone grafting, 23 went on to radiographic and clinical union without further intervention. All healed within a mean of 20 weeks (10 to 48). No further bone grafts were required, and few complications were encountered. These results were comparable to those of the 20 patients who underwent posterolateral bone grafting who united at a mean of 31.3 weeks (16 to 60) but one of whom required below-knee amputation for intractable sepsis. Central bone grafting is a safe and effective treatment for difficult nonunions of the tibia.
Assuntos
Transplante Ósseo/métodos , Fraturas não Consolidadas/cirurgia , Fraturas da Tíbia/cirurgia , Adolescente , Adulto , Idoso , Transplante Ósseo/efeitos adversos , Feminino , Consolidação da Fratura , Fraturas não Consolidadas/diagnóstico por imagem , Humanos , Masculino , Pessoa de Meia-Idade , Radiografia , Estudos Retrospectivos , Fraturas da Tíbia/diagnóstico por imagem , Fraturas da Tíbia/patologia , Fatores de Tempo , Resultado do Tratamento , Adulto JovemRESUMO
The results are presented of two experiments in which the quality of samples of bull semen was assessed by a number of laboratory tests and then correlated with the 112-day non-return percentage obtained by the use of those samples in A.I. The results reveal the inadequacy of the laboratory tests used as methods of predicting the fertility of semen samples but show that limits may be set outside which poor semen samples could be discarded.
Assuntos
Bovinos/fisiologia , Fertilidade , Inseminação Artificial/veterinária , Sêmen/fisiologia , Animais , Estudos de Avaliação como Assunto , Congelamento , Inseminação Artificial/métodos , Masculino , Sêmen/citologia , Motilidade dos Espermatozoides , Espermatozoides/fisiologia , Espermatozoides/ultraestruturaRESUMO
A peak in the level of serum N-acetylhexosaminidase immediately after parturition in three cows coincided in time with uterine involution.
Assuntos
Bovinos/fisiologia , Hexosaminidases/sangue , Útero/fisiologia , Animais , Bovinos/sangue , Feminino , Trabalho de Parto , Gravidez , Útero/enzimologiaRESUMO
Endometrium was obtained from cattle slaughtered at various stages of early pregnancy and of the oestrous cycle. Analyses for protein, RNA, DNA, glucose and some lysosomal enzymes were carried out on this tissue. The results are considered with respect to the general influence of the hormonal status of pregnancy and the specific influence of the hormonal status of pregnancy and the specific influence of the blastocyst in one uterine horn.
