OSCILLOMETRY BLOOD PRESSURE
MONITOR AND METHOD EMPLOYING
 Inventors: Maynard Ramsey, III, Tampa;
Richard Medero, Lutz; Rush W.
Hood, Jr., Tampa, all of Fla.
 Assignee: Critikon, Inc., Tampa, Fla.
 Appl. No.: 923,374
 Filed: Oct. 27,1986
Related U.S. Application Data
 Continuation-in-part of Ser. No. 751,840, Jul. 5, 1985, abandoned, and a continuation-in-part of Ser. No. 751,827, Jul. 5, 1985, abandoned.
 Int. CI.* A61B 5/02
 U.S. CI 128/682; 128/680
 Field of Search 128/677-683
 References Cited
U.S. PATENT DOCUMENTS
4,009,709 3/1977 Link et al 128/683
4,137,907 2/1979 Jansen et al 128/681
4,271,843 6/1981 Flynn 128/681
4,313,445 2/1982 Georgi 128/682
4,461,266 7/1984 .Hood, Jr. et al 128/681
4,625,277 11/1986 Pearce et al 128/680
4,638,810 1/1987 Ramsey, III et al 128/681
[ii] Patent Number: 5,170,795  Date of Patent: Dec. 15,1992
4,669,485 6/1987 Russell 128/679
FOREIGN PATENT DOCUMENTS
1163327 3/1984 Canada 128/677
"The Norse Systems Automatic BP Monitor" by Link et al, Internal Memo of Norse Systems Inc Nov. 1974.
Primary Examiner—David Shay
Attorney, Agent, or Firm—Audley A. Ciamporcero, Jr.
A blood pressure cuff is applied about a subject's artery, and inflated above the systolic level thus fully occluding the artery for a full heart cycle. The cuff pressure is thereafter reduced to permit an increasing flow through the progressively less occluded artery, and a measure of the peak amplitudes of the successively encountered blood pressure (oscillatory complex) pulses stored in memory. Also retained is the cuff pressure obtaining for each stored complex peak. In accordance with varying aspects of the present invention, the stored complex peak-representing data ensemble is corrected for aberrations; and improved data processing operates on the stored (and advantageously corrected) pulse peak data and the corresponding cuff pressure information to determine the subject's systolic arterial blood pressure.
7 Claims, 10 Drawing Sheets