A trapezoidal-wave electromagnetic blood flowmeter

A square wave electromagnetic flowmeter for application to intact blood vessels.

THIS paper deals with a new application of the principle of electromagnetic blood flow recording which avoids many of the troubles inherent in previous systems••. The reader is referred to numerous previous articles for details of the background theory not covered here ' ' ' 7 -. Briefly, the electromagnetic flowmeter depends for its operation upon the fact that if a conductor of electricity is...

An electromagnetic catheter-flowmeter.

An electromagnetic flowmeter incorporated into a catheter is described. The catheter is introduced into the aorta via the femoral artery. The flow sensor is located some distance below the catheter tip and is sensitive to flow at right angles to the catheter. A crater-like elevation at one end of the transducer lumen permits funnel-like connection of the transducer to the ostium of an aortic br...

A Transient Electromagnetic Flowmeter and Calibration Facility

Flowmeter and Calibration Facility P.J. Lefebvre Naval Underwater Systems Center, Newport, R.1. An electromagnetic flowmeter was developed to measure transient flows at a data rate of 60 Hz. The approach taken was to develop suitable electronics to replace the electronics ofa commercially available electromagnetic flowmeter normally used W. W. Durgin for steady-state operation. Use of the comme...

A newly modified electromagnetic blood flowmeter capable of high fidelity flow registration.

Direct measurement of coronary collateral blood flow in conscious dogs by an electromagnetic flowmeter.

The development of collateral circulation has been indirectly monitored by determining peripheral coronary pressure and Xe clearance. In the present experiments, the development of collateral blood flow following gradual (three dogs) and rapid (three dogs) complete occlusion of the central circumflex branch, during partial central occlusion, and in parallel with a rise in peripheral coronary pr...