Doppler guided retrograde catheterization system

Lee J. Frazin, Michael J. Vonesh, Krishnan B. Chandran, Fouad Khasho, Gregory Lanza, James V. Talano, David D. McPherson

Research output: Contribution to journalConference articlepeer-review


The purpose of this study was to investigate a Doppler guided catheterization system as an adjunctive or alternative methodology to overcome the disadvantages of left heart catheterization and angiography. These disadvantages include the biological effects of radiation and the toxic and volume effects of iodine contrast. Doppler retrograde guidance uses a 20 MHz circular pulsed Doppler crystal incorporated into the tip of a triple lumen multipurpose catheter and is advanced retrogradely using the directional flow information provided by the Doppler waveform. The velocity detection limits are either 1 m/second or 4 m/second depending upon the instrumentation. These studies have demonstrated that Doppler guided retrograde catheterization provides an accurate method to catheterization the aortic root and left ventricular chamber without x-ray. In humans, it may prove useful in a variety of settings including the development of invasive ultrasonic diagnostic and therapeutic technology.

Original languageEnglish
Number of pages1
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jan 1 1991
EventProceedings of Diagnostic and Therapeutic Cardiovascular Interventions - Los Angeles, CA, USA
Duration: Jan 20 1991Jan 22 1991


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