Fifty-four consecutive surgical cases of congenital ptosis were carefully evaluated to determine the incidence of refractive errors, strabismus and amblyopia. Of these patients, 70% had a refractive error, 43% had an astigmatism of more than 1.0, 55% had anisometropia, 27.5% had concomitant squint and 50% amblyopia.
A theoretical analysis was performed to evaluate the influence of developing flow on the heat transfer associated with laminar oscillating pipe flow. Simplified analytical approaches are briefly discussed before an investigation based on the numerical solution of the conservation equations for mass, momentum and energy is presented, assuming constant wall temperature and an incompressible viscous fluid. Focusing on operating conditions as found in heat exchangers of regenerative thermal machines, like Stifling engines or Vuilleumier heat pumps, numerous calculations of the flow field and the heat transfer have been executed covering wide ranges of the characteristic dimensionless groups. The results are presented in terms of correlations of the mean Nusselt number averaged on the pipe length and a distribution function describing the local heat transfer. Furthermore, it is shown that the derived correlations are also applicable to compressible fluid flow, provided that the relative pressure amplitude is within the limits typical of regenerative thermal machines.
Bei einer 34jährigen Frau wurden wegen einer Beckenvenenthrombose in der neunten Schwangerschaftswoche innerhalb von 18 Stunden 3,75 Miii. Einheiten Streptokinase (Streptase®) infundiert. Die thrombolytische Behandlung wurde gut vertragen; die Symptome der Thrombose bildeten sich zurück. Auf die therapeutischen Folgerungen, die sich aus der unterschiedlichen Plazentagängigkeit ergeben, wird hingewiesen: Von Cumarinderivaten wird während der Gravidität abgeraten, Heparin kann unbedenklich gegeben werden, der Einsatz von Streptokinase muß bei gegebener Indikation (ausgedehnte venöse Thrombosen, akute Lungenembolien) erwogen werden; zur Nachbehandlung wird eine mehrwöchige Hep arinbehandiung empfohlen.Thromboembolische Komplikationen der Schwangerschaft sind selten (2, 6). Stamm (32) gibt auf Grund statistischer Untersuchungen aus 18 zentraleuropäischen Kliniken eine Beinvenenthrombose auf etwa 300 Graviditäten an.
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