Contribution to and reconsideration of knowledge in small animal neonatology and gonadectomy in the dog
Abstract
Part 1: Physiology of the neonate and indicators for its well-being Veterinary neonatology is a rather young field of research. Important differences between the physiology of the neonate compared to the adult have to be taken into consideration in its clinical evaluation. The first topic of the present PhD thesis describes the current knowledge of neonatal physiology and different methods for evaluation of the newborns’ viability. Methods such as the Apgar scoring system and blood gas analysis are successfully used in veterinary medicine. Birth weight and neonatal growth have been evaluated as parameters to estimate a puppy’s risk for neonatal mortality. Although such a correlation has been proven, the populations used for this prove are composed of a high number of different breeds. To evaluate the usefulness of such an approach a comparison with a breed-specific evaluation has been made (Appendix 1). This comparison has shown important differences and the importance of breed-specific investigations of birth weight and growth of the neonate. Part 2: Current knowledge on beneficial and noxious effects of gonadectomy Elective gonadectomy is an important part of the daily veterinary practice. Although beneficial effects of gonadectomy on the dog have been proven, over the last two decades the number of studies reporting an increased risk for neoplastic and other disorders in the castrated animal increased. These reports, although predominantly retrospective, statistical…
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