Ultra-sonografia bidimensional convencional, de alta resolução e tridimensional no acompanhamento da gestação em cadela / Two-dimensional conventional, high resolution two-dimensional and three-dimensional ultrasonography in the evaluation of pregnant bitch

Gestational period in a bitch, after natural mating with a normal dog, was evaluated by two-dimensional conventional, high-resolution two-dimensional and three-dimensional ultrasonography. High-resolution two-dimensional ultrasonography show better image and provides early diagnosis of pregnancy (15 days) in comparison to conventional one (20 days). Three-dimensional ultrasonography was use to evaluate fetal morphology during late gestation period, however its application is still limited

A hypothesis: autonomic rhythms are reflected in growth lines of teeth in humans and extinct archosaurs.

A major determinant of tooth architecture is the arrangement of lines in dentin and in the enamel following the contour of the surface. Since the original description of these lines in the 19th century, they have been attributed to recurring events during tooth development. They have also attracted the attention of dental scientists and anthropologists; however, to date, studies of these structures have been largely theoretical and microscopic. We show here that the statistical properties of the spacing between the lines are similar in teeth from both ancient and modern humans and from extinct archosaurs, reptiles that lived tens or hundreds of millions of years ago-they also resemble heart rate variability of living humans. We propose that the deposition of these recurring structures is controlled by the autonomic nervous system. This control accounts for their regularity and recurrent nature and implies that the lines are an expression of a biologic rhythm which has been conserved throughout evolution. Details of the rhythms give clues to life styles in ancient civilizations and to the physiology of extinct archosaurs.

Acuidade do enema opaco pela técnica de Neuhauser no diagnóstico de doença de Hirschsprung / Accuracy of barium enema with Neuhauser's technique in the diagnosis of Hirschsprung's disease

Avaliamos retrospectivamente 14 pacientes de grupos etários variados, com quadro clínico de constipaçäo intestinal e que foram submetidos, no período de 1976 a 1989, a biópsia retal para confirmaçäo do diagnóstico de doença de Hirschsprung. Fizemos a correlaçäo entre enema opaco pela técnica de Neuhauser, manometria anorretal e biópsia retal. Concluimos que a doença é mais comum no sexo masculino; a localizaçäo do segmento agangliônico é mais frequente no reto e no sigmóide; a maioria das crianças com doença de Hirschsprung inicia com sintomas logo após o nascimento; o enema opaco pela técnica de Neuhauser apresenta acurácia de cerca de 80 p/cento no diagnóstico da doença de Hirschsprung, o que näo é suficiente para ser usado como método único na avaliaçäo da criança obstipada; a manometria anorretal, associada ao enema opaco pela técnica de Neuhauser, obtiveram acurácia de 100 p/cento quando houve concordância entre os métodos