Measurement of Flow in Single Blood Vessels Including Cardiac Output by Local Thermodilution

Measurement of Flow in Single Blood Vessels Including Cardiac Output by Local Thermodilution

BLOOD flow in single vessels can be measured by direct methods such as rotameter, drop-flow meter, Rein-thermostromuhr, Venturi principle, electromagnetic flow meter and bubble-floAV meter. Such methods are usually characterized by great accuracy, but their applicability is considerably limited in man by the fact that the appropriate vessel must be made accessible. Blood flow in some regions wa...

Direct volumetric blood flow measurement in coronary arteries by thermodilution.

OBJECTIVES This study sought to validate a new method for direct volumetric blood flow measurement in coronary arteries in animals and in conscious humans during cardiac catheterization. BACKGROUND Direct volumetric measurement of blood flow in selective coronary arteries would be useful for studying the coronary circulation. METHODS Based on the principle of thermodilution with continuous ...

Method of assessing the reproducibility of blood flow measurement: factors influencing the performance of thermodilution cardiac output computers.

Measurements of blood flow by three different makes of thermodilution cardiac output computer in an artificial circulation were analysed by linear regression against absolute flow measured by timed blood volume collection. For each computer the horizontal distance between the 95% confidence limits for a single prediction was calculated at a standard flow rate of 5 litres per minute. This measur...

Blood Flow Measurement: The Cardiac Output and Vascular Resistance

The maintenance of blood flow commensurate with the metabolic needs of the body is a fundamental requirement of human life. In the absence of major disease of the vascular tree (e.g., arterial obstruction), the maintenance of appropriate blood flow to the body depends largely on the heart's ability to pump blood in the forward direction. The quantity of blood delivered to the systemic circulati...

Measurement of Cardiac Output by Thermodilution with Constant Rate Injection of Indicator.