Apparatus for measuring intravascular blood flow

Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C600S505000

Reexamination Certificate

active

10603851

ABSTRACT:
Microwave apparatus for measuring the blood flow rate in a patient's blood vessel includes an intravascular catheter having proximal and distal ends and containing an inner coaxial cable forming a first antenna and an outer cable coaxial with the inner cable and forming a second antenna, the first antenna extending axially beyond the second antenna a selected distance. The apparatus also includes a control unit including a microwave transmitter, a microwave receiver and a processor controlling the transmitter and receiver. A diplexer is connected between the first and second antenna and the control unit to couple signals from the transmitter to the second antenna but not to the receiver and to couple signals from the first antenna to the receiver but not to the transmitter. The transmitter transmits microwave pulses to the first antenna which heat blood around that antenna. When the heated blood volume flows to the second antenna this is detected at the receiver which produces a detect signal. The processor measures the time interval between each pulse a subsequent detect signal and divides that time interval into the axial distance between the two antennas to compute the flow rate.

REFERENCES:
patent: 4557272 (1985-12-01), Carr
patent: 4583556 (1986-04-01), Hines et al.
patent: 5904709 (1999-05-01), Arndt et al.
patent: 6047216 (2000-04-01), Carl et al.
patent: 6210367 (2001-04-01), Carr
patent: 6408204 (2002-06-01), Hirschman
patent: 6475159 (2002-11-01), Casscells et al.
patent: 6496736 (2002-12-01), Carl et al.
patent: 6496738 (2002-12-01), Carr
Diller, Wendy, “The Coming of Age of Vulnerable Plaque”, Windhover Information, Inc. Start-up Nov. 2000, pp. 1-10.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for measuring intravascular blood flow does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for measuring intravascular blood flow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for measuring intravascular blood flow will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3894006

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.