RESUMO
The growth of the long bones has been a subject of great importance lately, because it provides non invasive diagnosis of prenatal malformations. This study examines 116 tibia and fibula bones of Brazilian fetuses (17 males and 12 females) with gestational age ranging from the 16th to the 34th week postconception. Only fetuses with no visible congenital malformations and with normal biometric parameters were considered. The bones were measured with a 0.1 mm precision caliper and their Total Length (TL), the Ossified Diaphysis Length (ODL), the Diaphysis width (DW), the Proximal Epiphyss length (PEL) and the Distal Epiphyss Length (DEL) were studied. The Total Length (TL) and the Ossified Diaphysis Length (ODL) were correlated with those of the fetal Crown-Rump length (C-R). Our results have shown that there was an increase in all these measures, with no significant statistical difference observed between the left and the right sides. A significant correlation coefficient was found in most parts of the measurements studied. This study aims to provide data to be utilized in monitoring bone growth as well as in the diagnosis of the lower limb deformities during fetal period.
Assuntos
Monitorização Fetal/métodos , Fíbula/embriologia , Perna (Membro)/anormalidades , Diagnóstico Pré-Natal/métodos , Tíbia/embriologia , Desenvolvimento Embrionário e Fetal/fisiologia , Feminino , Fíbula/anormalidades , Idade Gestacional , Humanos , Masculino , Tíbia/anormalidadesRESUMO
In a attempt to verify experimentally any possible alterations of epithelial cells of vas deferens caused by radiopaque substance, the right and left vasa deferential of 3 rats were injected respectively with saline solution (0.9 per cent NaCl) and Conray-400 (66.8 per cent sodium iodomethamate). 72 hours later, the animals were killed by cranial trauma and histolofical sections and electronmiucrographs of their vasa deferentia were observed. The histological sections of epithelial cells of left vasa deferentia showed a decrease in height and slight changes in stereocilia as compared with those of right contralateral vasa deferentia. Electronmicrographs displayed a reduction in number and size of stereocilia and alterations of many mitochondria in epithelial cells of left vasa deferentia
Assuntos
Ratos , Animais , Masculino , Meios de Contraste/efeitos adversos , Ducto Deferente/ultraestrutura , Cílios/efeitos dos fármacos , Microscopia Eletrônica , Mitocôndrias/efeitos dos fármacos , Ducto Deferente/efeitos dos fármacosAssuntos
Próstata/irrigação sanguínea , Adulto , Idoso , Artérias/anatomia & histologia , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
Dissecando 30 cadáveres (60 rins), os autores encontraram 93 artérias, sendo 44 direitas e 49 esquerdas, todas elas orignando-se diretamente da aorta: únicas, 33 vezes (55% ); duplas, 21 (35,0% ); triplas, seis (10,0% ). estes dados, levaram os autores, a concluir que poderia ser considerado "normal" anatômico a ocorrência de uma (33 vezes em 60 rins, 55,0% ) ou duas (21 vezes, 35,0% ) artérias renais para um mesmo rim, independentemente das variáveis lado, sexo e grupo étnico. Mais de duas artérias de cada rim (seis vezes em 60 rins, 10,0% ) poderia, entäo, ser considerado como variaçäo