VASCULAR RESPONSE TO FRACTURE HEALING IN THE BOVINE     

A. P. Singh  MVSc  PhD  J. M. Nigam  MVSc  PhD  FRVAC 《Veterinary radiology & ultrasound》1983,24(4):174-180

Angiography during metatarsal fracture healing following simple coaptation, stainless steel plating, and allogeneic onlay bone plating was performed in 24 calves. Angiograms obtained during the early stage of fracture healing demonstrated enhanced extraosseous vascularity at and around the fracture site regardless of the technique used for immobilization. However, the increased soft tissue vascularity was more intense in animals with simple coaptation than with metallic or allogeneic onlay bone plating. From four to six weeks the fracture site was vascularized, with visualization of crossover vascular contacts and ramification of vessels supplying the bridging callus. These changes were observed earlier and were more intense following plating. Enhanced soft tissue vascularity persisted longer in animals with delayed union and infection, whereas it regressed to nearly normal by the tenth week in normally healing fractures.  相似文献   

RADIOGRAPHIC VISUALIZATION OF THE RUMINANT UPPER URINARY TRACT BY A DOUBLE CONTRAST TECHNIQUE     

A. P. Singh  MVSc  PhD  Jit  Singh  MVSc  PhD  H. D. Williamson  MA  BA  DCR  P. K. Peshin  MVSc  J. M. Nigam  MVSc  PhD  FRVAC 《Veterinary radiology & ultrasound》1983,24(3):106-111

The ruminant urinary tract is normally obscured by abdominal viscera, which hampers rediographic investigation by conventional urographic methods. A double contrast technique that uses pneumoperitoneum in conjunction with excretory urography is described. Bolus and infusion urographic techniques were used in sheep and calves. Only the infusion technique was used in cows. The radiographic anatomy of the upper urinary tract in these animals is described. Visualization of the nephrogram and collecting system varied, depending on the method of excretory urography used.  相似文献