Maximal velocity of fetal pulmonary venous blood flow

Venous flow velocity, venous volume and arterial blood flow.

The relationship of arterial blood flow and venous volume to venous flow velocity was studied in normal subjects. The effects of current modes of treatment in venous thrombosis and of a vasodilator drug on venous flow velocity were also investigated. Total calf flow and venous volume were measured by venous occlusion plethysmography while venous flow axial velocity was determined by the transit...

Prediction of Fetal Acidosis by Blood Flow Velocity Waveform of the Fetal Descending Thoracic Aorta

=AbstractZFetal descending thoracic aorta blood flow velocity waveforms were measured in 63 pregnancies. They were either delivered by elective CIS before labor (56 patients) or suffered an antefartum fetal death (7 patients). There was a significant correlation between the aorta waveforms and the cord arterial pH. A cord arterial pH less than 7.20 or an intrauterine fetal death were used as ou...

Pulmonary blood flow and venous return during spontaneous respiration.

During normal spontaneous inspiration pulmonary blood flow increases in spite of an increase in resistance to flow in the pulmonary bed. The enhancement of pulmonary flow is caused by an augmentation of venous return due to thoracic aspiration. The right heart acts as a moderator for the pulmonary flow by temporarily storing part of the large influx of venous blood during inspiration and ejecti...

Leukotriene synthesis inhibition increases pulmonary blood flow in fetal lambs.

Quantitative blood flow velocity imaGinG

Laser speckle flowmetry suffers from a debated quantitative relationship with blood flow, velocity or tissue perfusion and a lack of calibration of the inverse relationship 1/τc = αV between decorrelation time (τc) and flow velocity (V). Using a modified microcirculation imager, we experimentally investigate on the influence of the optical properties of scatterers on α in vitro and in vivo. We ...