Methods for flow Measurements

摘要: Blood flow is highly complicated, because it influenced by numerous factors including the state of vascular bed, myocardial function, pulsatility and geometry compliance. To help us understand connections between blood conditions heart other vessels, there has always been need for methods obtaining information in vivo. These techniques became available during last century, although generally invasive destructive, they have provided clinicians with on supply, localized genesis development cardiovascular diseases. The earlier indirect relied deduction from differential pressure recordings. introduction electromagnetic catheter-tip velocity probe, meter hot-film anemometry shifted emphasis measurements toward measurements. Later, pulsed Doppler meters offered a noninvasive method measurement flow.