Achieving a stable blood oxygen level in patients who depend on this level of care is arguably determined in part by precise regulation of oxygen flow. The reliance on flow meter accuracy is the cautionary message that is relayed in the paper by Davidson et al in this issue of RESPIRATORY CARE.1 There is limited evidence that defends oxygen flow meter accuracy,2 which may account for the lack o...

Background. To examine whether an extremely enlarged left atrium (giant left atrium) obstructs the venous return from the inferior vena cava (IVC), the velocity ofIVC flow was measured at its junction with the right atrium (IVC orifice) in patients with mitral stenosis by use of color and pulsed-wave Doppler echocardiography from a right parasternal longitudinal plane. Methods and Results. The ...

MIYAZAWA, K., YAMAKI, M., ISHIKAWA, K., TSUIKI, K., KOBAYASHI, Y. and KATORI, R. Effects of Metaproterenol and Deslanoside on Hemodynamics in Aortic Regurgitation. Tohoku J. exp. Med., 1973, 110 (1), 81-87 Hemodynamic responses to administration of metaproterenol and deslanoside were studied in 5 and 3 patients with aortic regurgitation, respectively. Metaproterenol pro duced an increase in for...

In this paper, in order to understand the flow-pipe interaction more clearly, the variations on flow pattern around semi-buried pipelines due to steady current have physically and numerically been investigated. In physical modeling section, the experiments have been carried out in a flume with 10 meter length, 0.3 meter width and 0.5 meter depth using a P.V.C pipe with 6.35 cm in diameter (for ...