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Biomedical subjects

P R Bourne

Publications and source records attributed to P R Bourne.

9 recordsLinked to original sources
PubMed1977

A monitor for the continuous assessment of left ventricular performance after open-heart operations.

A cardiac monitoring system has been developed that incorporated phasic aortic blood flow measurement by an extractable electromagnetic flow probe and high-fidelity arterial blood pressure recordings. Cardiac output, stroke volume, and peak aortic blood flow are measured continuously; using logarithmic amplifiers, the pressure-flow derivatives of left ventricular function, such as cardiac power and stroke work, are obtained beat by beat. This monitor is used to follow the postoperative course of patients undergoing cardiac operations and to evaluate the hemodynamic effect of therapeutic agents.

Cardiac Surgical Procedures↗
PubMed1975

A cardiac monitor combining flow and pressure measurement.

Continuous measurements on patients after cardiac surgery are usually limited to blood pressure and ECG. This article describes a new monitor which combines instantaneous arotic flow and arterial pressure measurements to derive stroke volume, ventricular power, stroke work, and an indication of left ventricular afterload. The methods used to obtain the new derivatives are discussed and clinical applications described.

Aorta↗