Surgery – Diagnostic testing – Cardiovascular
Patent
1997-07-02
2000-09-19
Hindenburg, Max
Surgery
Diagnostic testing
Cardiovascular
600488, 600561, A61B 502
Patent
active
061204579
ABSTRACT:
A catheter-based physiological pressure sensing device, which can be calibrated in vivo, is disposed in the distal end of a catheter, and is preferably in the form of a bulb-like device. The pressure sensing device includes a pressure sensor tip and pressure sensor element disposed in the pressure sensor tip. The pressure sensor element has first and second opposing surfaces which form separate and isolatable first and second chambers. An aperture is formed in an external wall of the pressure sensor tip to provide a passageway into the first chamber and expose the first surface of the pressure sensor element to a physiological pressure. A blocking element, such as a balloon, is disposed in the first chamber and is adapted for selectively blocking the aperture. To measure a physiological pressure, the aperture is unblocked to allow an outside pressure into the first chamber and a reference pressure is presented to the second chamber so that the surfaces of the pressure sensing element can measure the differential pressure. To calibrate or zero the device, the blocking element blocks the aperture to seal the first chamber with respect to external pressure and a fluid at a known pressure is introduced to the first and second chambers. The pressure sensor element provides an output signal indicative of a zero offset pressure to a pressure monitoring circuit to calibrate, or zero, the sensor and enhance the accuracy of subsequent pressure measurements.
REFERENCES:
patent: 3724274 (1973-04-01), Millar
patent: 3748623 (1973-07-01), Millar
patent: 4206761 (1980-06-01), Cosman
patent: 4206762 (1980-06-01), Cosman
patent: 4281666 (1981-08-01), Cosman
patent: 4281667 (1981-08-01), Cosman
patent: 4589287 (1986-05-01), Dickens
patent: 4653508 (1987-03-01), Cosman
patent: 4660568 (1987-04-01), Cosman
patent: 4672974 (1987-06-01), Lee
patent: 4901735 (1990-02-01), Von Berg
patent: 5133358 (1992-07-01), Gustafson et al.
patent: 5191898 (1993-03-01), Millar
patent: 5203340 (1993-04-01), Gustafson et al.
patent: 5257630 (1993-11-01), Broitman et al.
patent: 5325865 (1994-07-01), Beckman et al.
patent: 5460183 (1995-10-01), Raynes et al.
patent: 5566680 (1996-10-01), Urion et al.
patent: 5788642 (1998-08-01), Hamatake et al.
Brown Eric J.
Coombes Alan
Carter Ryan
Hindenburg Max
Johnson & Johnson Professional Inc.
LandOfFree
In vivo zeroing of catheter pressure sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with In vivo zeroing of catheter pressure sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In vivo zeroing of catheter pressure sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1067464