Method of Obtaining an Estimation of a Person's Aortic Blood Pressure

• US 20080255463A1
• Filed: 01/04/2006
• Published: 10/16/2008
• Est. Priority Date: 01/10/2005
• Status: Abandoned Application

• Current Assignee: Carefusion U.K. 232 Ltd. (Becton, Dickinson & Co)
• Original Assignee: Micro Medical Ltd. (Cardinal Health, Inc.)
• Inventors: Chowienczyk, Philip Jan, Millasseau, Sandrine
• Application Number:
  US11/794,275
• Publication Number:
  US 20080255463A1
• Time in Patent Office: Days
• US Class Current: 600/486
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/02108 from analysis of pulse wave characteristics

Abstract

A method of obtaining an estimation of a person'"'"'s aortic systolic blood pressure, which method comprises non-invasively measuring the person'"'"'s brachial systolic blood pressure, non-invasively measuring the person'"'"'s brachial diastolic blood pressure, obtaining the person'"'"'s radial augmentation index by measuring the person'"'"'s radial pulse waveform, and obtaining the estimation of the person'"'"'s aortic systolic blood pressure from the following equation: aSBP=α+β·rA1x+γ·bSBP+δ·bDBP where the coefficients α, β, γ and δ are constants with approximate values of α=−24.2, β=0.28, γ=0.83, δ=0.17.

Claims

1. A method of obtaining an estimation of a person'"'"'s aortic systolic blood pressure, which method comprises non-invasively measuring the person'"'"'s brachial systolic blood pressure, non-invasively measuring the person'"'"'s brachial diastolic blood pressure, obtaining the person'"'"'s radial augmentation index by measuring the person'"'"'s radial pulse waveform, and obtaining the estimation of the person'"'"'s aortic systolic blood pressure from the following equation:

aSBP=α

+β

·

rA1x+γ

·

bSBP+δ

·

bDBP

where the coefficients α

, β

, Y and δ

are constants with approximate values of

α

=−

24.2=

β

=0.28

Y=0.83

Δ

=0.17

2. A method according to claim 1 in which the person'"'"'s brachial systolic blood pressure is non-invasively measured using a sphygmomanometer.

3. A method according to claim 1 in which the person'"'"'s brachial diastolic blood pressure is non-invasively measured using a sphygmomanometer.

4. A method according to claim 1 in which the person'"'"'s radial pulse waveform is measured non-invasively.

5. A method according to claim 4 in which the person'"'"'s radial pulse waveform is obtained using a tonometer.

6. A method according to claim 1 in which the person'"'"'s radial pulse waveform is measured invasively.

7. A method according to claim 6 in which the person'"'"'s radial pulse waveform is obtained using by placing a canula in the radial artery and attaching a pressure transducer to the canula.

8. (canceled)