RESUMO
The impact of acute volume imbalances on gastric volume (GV) was studied in anesthetized rats (250-300 g). After cervical and femoral vessel cannulation, a balloon catheter was positioned in the proximal stomach. The opposite end of the catheter was connected to a barostat with an electronic sensor coupled to a plethysmometer. A standard ionic solution was used to fill the balloon (about 3.0 ml) and the communicating vessel system, and to raise the reservoir liquid level 4 cm above the animals' xiphoid appendix. Due to constant barostat pressure, GV values were considered to represent the gastric compliance index. All animals were monitored for 90 min. After a basal interval, they were randomly assigned to normovolemic, hypervolemic, hypovolemic or restored protocols. Data were compared by ANOVA followed by Bonferroni's test. Mean arterial pressure (MAP), central venous pressure (CVP) and GV values did not change in normovolemic animals (N = 5). Hypervolemic animals (N = 12) were transfused at 0.5 ml/min with a suspension of red blood cells in Ringer-lactate solution with albumin (12.5 ml/kg), which reduced GV values by 11.3 percent (P<0.05). Hypovolemic rats (N = 12) were bled up to 10 ml/kg, a procedure that increased GV values by 15.8 percent (P<0.05). In the restored group (N = 12), shed blood replacement brought GV values back to basal levels in bled animals (P>0.05). MAP and CVP values increased (P<0.05) after hypervolemia but decreased (P<0.05) with hypovolemia. In conclusion, blood volume level modulates gastric compliance, turning the stomach into an adjustable reservoir, which could be part of the homeostatic process to balance blood volume
Assuntos
Animais , Masculino , Ratos , Volume Sanguíneo , Sistema Digestório , Análise de Variância , Balão Gástrico , Motilidade Gastrointestinal , Frequência Cardíaca , Hemorragia , Pletismografia , Ratos Wistar , EstômagoRESUMO
Os autores apresentam sua rotina com o emprego dos retalhos musculares e musculocutaneos no tratamento das lesoes complexas do membro inferior. Destacam a dificuldade paro o tratamento das lesoes com grande deficit cutaneo quando localizados no terco inferior da perna. Defendem, em casos escolhidos, para o tratamento de lesoes neste nivel, o uso de retalho musculocutaneo em "cross-leg" do musculo gemeo interno. Descrevem a tecnica operatoria e sao apresentados dois casos tratados por este metodo, com bastante sucesso. As vantagens e desvantagens sao discutidas na sequenci
Assuntos
Adolescente , Pessoa de Meia-Idade , Humanos , Masculino , Nervo Musculocutâneo , Retalhos Cirúrgicos , Fraturas da TíbiaRESUMO
Os autores descrevem o uso do retalho miocutaneo do musculo Grande Dorsal nas reconstrucoes mamarias pos-mastectomias. Apresentam uma revisao da literatura sobre o metodo, e sua experiencia no tratamento com esta tecnica nas sequelas pos-mastectomias. Estabelecem indicacoes para o seu uso e apresentam alguns casos operados.Concluem enumerando as vantagens deste procedimento segundo suas proprias experiencias