Method and apparatus for non-invasive, cuffless, continuous bloo

Details Method and apparatus for non-invasive, cuffless, continuous bloo Method and apparatus for non-invasive, cuffless, continuous bloo

1996-10-11

1999-02-02

Nasser, Robert L.

Surgery

Diagnostic testing

Cardiovascular

600494, 600500, A61B 500

Patent

active

058657550

ABSTRACT:
Arterial blood pressure of a subject is determined by detecting the EKG for the subject and selecting a fiducial point on the EKG during a pulse. Apparatus is provided for monitoring blood volume versus time at a selected location on the subject's body such as a fingertip. A time difference between the occurrence of the selected fiducial point on the EKG and a selected change in blood in volume at the selected body location is determined. This time difference depends on the arrival time of the pulse at the distal location in addition to the shape of the blood volume versus time curve. Heart rate is determined from the EKG. The arterial pressure is computed from pulse arrival time, volumetric wave shape and instantaneous heart rate for each pulse. It is preferred that the fiducial point on the EKG be an R-wave. A suitable method for determining change in blood volume utilizes photoplethysmography. Methods are disclosed for determining diastolic pressure, systolic and mean arterial pressure. In another aspect, artifact detection and rejection enabled. The invention provides for a continuous measure of blood pressure in a non-invasive, cuffless manner.

REFERENCES:
patent: Re33834 (1992-03-01), Warner
patent: 4030485 (1977-06-01), Warner
patent: 4295471 (1981-10-01), Kaspari
patent: 4418700 (1983-12-01), Warner
patent: 4425920 (1984-01-01), Bourland et al.
patent: 4834107 (1989-05-01), Warner
patent: 4869262 (1989-09-01), Orr et al.
patent: 4880013 (1989-11-01), Chio
patent: 4907596 (1990-03-01), Schmid et al.
patent: 5054493 (1991-10-01), Cohn et al.
patent: 5099853 (1992-03-01), Uemura et al.
patent: 5111817 (1992-05-01), Clark et al.
patent: 5140990 (1992-08-01), Jones et al.
patent: 5152296 (1992-10-01), Simons
patent: 5237997 (1993-08-01), Greubel et al.
patent: 5368040 (1994-11-01), Carney

Affiliated with

Also associated with

Rating

Method and apparatus for non-invasive, cuffless, continuous bloo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for non-invasive, cuffless, continuous bloo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for non-invasive, cuffless, continuous bloo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1112241