RESUMO
L-Transposition of the great arteries with aortic atresia without an outlet chamber is a rare congenital heart defect. We used a modified Norwood procedure incorporating a type of direct coronary transfer for successful palliation of this lesion in a neonate.
Assuntos
Valva Aórtica/anormalidades , Cuidados Paliativos/métodos , Transposição dos Grandes Vasos/cirurgia , Procedimentos Cirúrgicos Cardíacos/métodos , Humanos , Recém-Nascido , MasculinoRESUMO
Cellular foams used in shoe insoles come in a variety of structural configurations differing with respect to cell geometry. The compression of a cellular foam depends on cell reticulation and size. Examination of the compression behavior of closed cell polyethylene foams revealed distinct time-and nontime-related properties that occur during static and cyclic loading. Physical parameters were developed and determined to exactly specify pressure profiles that occur at the plantar interface. Evaluation of an interface material can be made based on peak pressures which are dependent on depth of compression, foam thickness, and physical properties of the foam. Sustained loading damages the mechanical integrity of the cellular structure such that thickness does not completely recover. Therefore, issuing several pairs of thick insoles for daily rotation is recommended for a particular foam.
Assuntos
Doenças do Pé/prevenção & controle , Teste de Materiais/métodos , Polietilenos , Úlcera Cutânea/prevenção & controle , Fenômenos Biomecânicos , Humanos , Sapatos , Estresse MecânicoRESUMO
Comparative maturation rates of 36 below-knee postoperative, healed amputation residual limbs were observed. Measured were the limb volumes and circumferences. Three methods of residual limb stabilization were employed: 1) elastic wrap; 2) plaster cast and pylon; and, 3) plastic laminate socket and pylon. The limbs receiving the plastic laminate showed the most rapid stabilization, while the elastic wrap did not stabilize. Considerable variance existed in relations between variables. Correlation between limb circumference and volume was poor. However, in general, the rates of change, i.e., the relations between volume and time, and circumference and time, were statistically significant (p less than .05).