Surgery – Diagnostic testing – Cardiovascular
Patent
1996-06-12
1999-06-22
Nasser, Robert L.
Surgery
Diagnostic testing
Cardiovascular
600504, 600547, A61B 0500
Patent
active
059138262
ABSTRACT:
An apparatus for assessing cardiovascular status of a mammal comprising a system for locally applying a pressure to an artery, capable of restricting blood flow through said artery, a wideband external pulse transducer, having an output, situated to measure acoustic signals proximate to said artery, and a computing device receiving said output for calculating, based on said output, a peripheral vascular impedance value. The systolic and diastolic pressure are determined by an appearance and disappearance of a high frequency signal upon changes in cuff pressure partially occluding arterial blood flow. The arterial pressure waveform is estimated by measuring the wideband acoustic emissions from a non-occluded artery. The peak and trough of the arterial pressure waveform are calibrated with the determined systolic and diastolic pressures. The systemic vascular resistance is computed by occluding blood flow with a supersystolic pressure, and calculating, based on a natural logarithm of a difference in amplitude between a first major systolic peak and first major systolic trough and an amplitude of a second major systolic peak, a first order linear equation, which may be normalized for body surface area. The data obtained may also be used to analyze cardiac output, arterial compliance and dp/dt.
REFERENCES:
patent: 4074711 (1978-02-01), Link et al.
patent: 4349034 (1982-09-01), Ramsey, III
patent: 4389580 (1983-06-01), Bendyshe Walton et al.
patent: 4625277 (1986-11-01), Pearce et al.
patent: 4718428 (1988-01-01), Russell
patent: 4793360 (1988-12-01), Miyawaki et al.
patent: 4796184 (1989-01-01), Bahr et al.
patent: 4981141 (1991-01-01), Segalowitz
patent: 5178154 (1993-01-01), Ackmann et al.
patent: 5188106 (1993-02-01), Nappholz et al.
patent: 5211177 (1993-05-01), Chesney et al.
patent: 5222020 (1993-06-01), Takeda
patent: 5241966 (1993-09-01), Finkelstein et al.
patent: 5253329 (1993-10-01), Villarreal et al.
patent: 5265615 (1993-11-01), Frank et al.
patent: 5297556 (1994-03-01), Shankar
patent: 5298602 (1994-03-01), Shikinami et al.
patent: 5301679 (1994-04-01), Taylor
patent: 5307818 (1994-05-01), Segalowitz
patent: 5309917 (1994-05-01), Wang et al.
patent: 5331968 (1994-07-01), Williams et al.
patent: 5337752 (1994-08-01), Reeves
patent: 5339290 (1994-08-01), Greenstein
patent: 5339818 (1994-08-01), Baker et al.
patent: 5355890 (1994-10-01), Aguirre et al.
patent: 5363344 (1994-11-01), Sofen
patent: 5365937 (1994-11-01), Reeves et al.
patent: 5370122 (1994-12-01), Kunig et al.
patent: 5379774 (1995-01-01), Nishimura et al.
patent: 5388163 (1995-02-01), Elko et al.
patent: 5390679 (1995-02-01), Martin
patent: 5391190 (1995-02-01), Pederson et al.
patent: 5409009 (1995-04-01), Olson
patent: 5446826 (1995-08-01), Otsuki
patent: 5448681 (1995-09-01), Khan
patent: 5480412 (1996-01-01), Mouchawar et al.
patent: 5496361 (1996-03-01), Moberg et al.
patent: 5497778 (1996-03-01), Hon
patent: 5509423 (1996-04-01), Bryars
patent: 5509424 (1996-04-01), Al-Ali
patent: 5511553 (1996-04-01), Segalowitz
patent: 5533511 (1996-07-01), Kaspari et al.
Blank, S.G., "The Korotkoff Signal and its Relationship to Arterial Pressure Pulse", Cornell University (1987) (UMI 8810638).
Blank, et al, Association of the Auscultatory Gap, Ann Intern Med 124 (10): 877-883 (May 1996).
Blank, et al. Isolated Elevation of Diastolic Blood Pressure, Hypertension 26(3): 383-389 (Sep. 1995).
Blank, et al, How Should Diastolic Blood Pressure be Defined, Hypertension 24(2): 234-240 (Aug. 1994).
Blank, et al, Characterization of Auscultatory Gaps, Hypertension 17(2): 225-233 (Feb. 1991).
Blank, et al, Wideband External Pulse Recording, Circulation 77 (6): 1297-1305 (Jun. 1988).
AMP Piezo Film Sensors Product Guide Catalog 65711 Issued Apr. 1995.
K-One Technologies
Nasser Robert L.
LandOfFree
Wideband external pulse cardiac monitor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wideband external pulse cardiac monitor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wideband external pulse cardiac monitor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1704988