A Square Wave Electromagnetic Flowmeter for Application to Intact Blood Vessels

Denison, Adam B. Jr. M.D.
Spencer, Merrill P. M.D.
Green, Harold D. M.D.

Department of Physiology and Pharmacology of the Bowman Gray School of Medicine of Wake Forest College, Winston-Salem, N. C.

Received for Publication August 5, 1954.

Circulation Research 3(1):p 39-46, January 1955.

A new type electromagnetic flowmeter which utilizes an alternating square wave magnetic field applied to the unopened blood vessel is described. It attains stability of baseline and sensitivity not possible with older D.C. and A.C. meters and therefore puts measurement of blood flow through the unopened vessel on a practical basis.