METHOD FOR DETERMINING CARDIOVASCULAR PARAMETERS AND DEVICE AND COMPUTER PROGRAM PRODUCT FOR CARRYING OUT SAID METHOD

• US 20090099464A1
• Filed: 10/10/2008
• Published: 04/16/2009
• Est. Priority Date: 04/01/2005
• Status: Abandoned Application

• Current Assignee: Kaz USA Incorporated (Helen of Troy Limited)
• Original Assignee: Kaz USA Incorporated (Helen of Troy Limited)
• Inventors: Heck, Ulrich, Schnak, Fred, Freund, Dirk, Harttmann, Brigitte, Roenneberg, Gerrit, Hollinger, Stefan, Wunder, Dieter
• Application Number:
  US12/249,346
• Publication Number:
  US 20090099464A1
• Time in Patent Office: Days
• US Class Current: 600/490
• CPC Class Codes: A61B 5/02 Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure

Abstract

A method, device and computer program product used to determine at least one cardiovascular parameter P^m, for example, the pulse, average arterial pressure (MAP), systolic pressure, diastolic pressure, arterial wave form, speed of the blood flow, systole duration, or diastole duration, by a measuring device which detects, in a non-invasive manner and in a time interval, several signals F_l^m of an artery, through which blood flows, as a reaction to an application of force to the artery. As a result, distances between the signals F_l^m and the reference signals are defined from the detected signals F_l^m with the aid of reference signals, which are used to determine the at least one parameter P^m

Claims

1. A method for determining at least one cardiovascular parameter P^m;

comprising;

applying a force to artery, through which blood is flowing;

noninvasively detecting signals F_l^m in a time interval as a reaction to the force on the artery using a measuring instrument; and

using intervals between the signals F_l^m and reference signals to determine the at least one parameter P^m, the intervals being defined from the detected signals F_l^m in combination with the reference signals.

2. The method of claim 1, wherein a reference database F_l,m,k^Ref is used as reference.

3. The method of claim 2, wherein and interval function {tilde over (D)}_k,m(F_l^m,F_l,m,k^Ref) is defined using the reference database F_l,m,k^Ref.

4. The method of claim 1 wherein the distances of reference measurements from the measurement to be analyzed, are less than a specified distance.

5. The method of claim 1 wherein at least one of the distances of the signals detected and the reference signals is averaged.

6. The method of claim 1 wherein the signals F_l^m and the reference database F_l,m,k^Ref, are time-scaled in a particular time resolution.

7. The method of claim 6 wherein a new interval function D_k,m, is defined from the time-scaled signals and the time-scaled reference database and used for determining time-scaled parameters P^m.

8. The method of claim 1 wherein polynomials of any order N_m are used for determining the parameters P_m.

14. A computer program product for determining at least one cardiovascular parameter P^m, such as a pulse, by means of the arterial pressure (MAP), the systolic pressure, the diastolic pressure, the vein elasticity, the peripheral resistance and the like, for carrying out a method of claim 1.

9. A device for determining at least one cardiovascular parameter P_m comprising:

at least one data processing installation, at least one memory unit;

at least one measuring instrument for detecting signals of an artery, through which blood is flowing; and

at least one data processing installation configured to determine the parameter based on intervals between the signals and the reference signals.

10. The device of claim 9 wherein the measuring instrument is configured to measure at least one of an upper arm, a wrist and a finger.

11. The device of claim 9 wherein the data processing installation, the memory unit and the measuring instrument are disposed in a common housing.

12. The device of claim 9 further comprising an interface for exchanging data is provided.

13. The device of claim 9 wherein the memory unit is configured to storing several reference databases.