Diagnostic catheter for monitoring cardiac output

Abstract From the Canadian patent

An elongated flexible plastic tubular member having a plurality (five) lumens extending along the length dimension thereof has a balloonlike expander located at the distal end portion thereof the balloon, surrounding a port communicating with one of the plural lumens so that a fluid introduced at the proximal end of the catheter can be made to inflate the balloon. Starting a first predetermined distance proximal of the distal end of the catheter is a zone in which a series of surface electrodes are axially spaced over the zone of the catheter body. extending through another lumen of the catheter are the electrical conductors which connect each of the surface electrodes to an electrical …