U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Cardiovascular system observation method

Patent 5961467 Issued on October 5, 1999. Estimated Expiration Date: Icon_subject April 1, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3126885

3903872

3908639

Automatic blood pressure measuring and recording system
Patent #: 4178918
Issued on: 12/18/1979
Inventor: Cornwell

Noninvasive blood pressure measuring system
Patent #: 4312359
Issued on: 01/26/1982
Inventor: Olson

Blood pressure measuring apparatus
Patent #: 4337778
Issued on: 07/06/1982
Inventor: Akira ,   et al.

Non-invasive real time blood pressure measurement system
Patent #: 4343314
Issued on: 08/10/1982
Inventor: Sramek

Automatic mean blood pressure reading device
Patent #: 4349034
Issued on: 09/14/1982
Inventor: Ramsey, III

Electronic blood pressure measuring apparatus
Patent #: 4432373
Issued on: 02/21/1984
Inventor: Ogawa ,   et al.

Method and apparatus for blood pressure measurement
Patent #: 4484584
Issued on: 11/27/1984
Inventor: Uemura

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Inventors

Application

No. 829852 filed on 04/01/1997

US Classes:

600/485, Measuring pressure in heart or blood vessel600/494, Pulse-induced pressure fluctuation in occluder generates electric signal600/495, Pressure in inflatable occluder automatically raised above systolic pressure600/500Detecting blood vessel pulsation

Examiners

Primary: Nasser, Robert L.

Attorney, Agent or Firm

Foreign Patent References

  • 0 197 302 A2 EP. 10/13/1986
  • 0 483 355 A1 EP. 05/13/1990

International Class

A61B 005/00

Foreign Application Priority Data

1993-04-02 JP

Abstract

A cardiovascular system observation method using a computer processor on the basis of pulse wave amplitude data obtained from a patient in a compressed state which changes, said method comprising: process steps for forming measurement patterns expressing the transition of pulse wave amplitude values by smoothing minute fluctuations of said pulse wave amplitude data and normalizing the pulse wave amplitude values and pulse wave intervals of said pulse wave amplitude data; process steps for extracting the features of the measurement patterns; and process steps for judging the pattern shape to judge reference pattern groups to which said measurement pattern belongs by using said features.

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