METHOD AND DEVICE FOR INFLATING A CUFF OF A NON-INVASIVE BLOOD PRESSURE MEASUREMENT APPARATUS

• US 20120323128A1
• Filed: 01/27/2011
• Published: 12/20/2012
• Est. Priority Date: 02/22/2010
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Ma, Sufang
• Granted Patent: US 9,833,153 B2
• Time in Patent Office: Days
• US Class Current: 600/490
• CPC Class Codes: A61B 5/02141 Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits A61B5/02233, A61B5/0235 take precedence
• CPC Class Codes: A61B 5/02233 Occluders specially adapted therefor tourniquets A61B17/132
• CPC Class Codes: A61B 5/02241 of small dimensions, e.g. adapted to fingers
• CPC Class Codes: A61B 5/0225 the pressure being controlled by electric signals, e.g. derived from Korotkoff sounds

Abstract

This invention provides a method and device for inflating a cuff of a non-invasive blood pressure measurement apparatus. The method comprises: obtaining a plurality of pressure values of the cuff at a plurality of time points; calculating a first inflation speed parameter on the basis of the plurality of pressure values, a plurality of target pressure values of the cuff at the plurality of time points and a plurality of inflation speed parameters corresponding to each time interval between every two adjacent time points of the plurality of time points; and inflating the cuff at a speed corresponding to the first inflation speed parameter from a last time point of the plurality of time points to a first time point after the plurality of time points. In this way, uniform cuff inflation can be achieved when the target pressure values of the cuff change uniformly, so that the over-voltage phenomenon or the condition of low-speed cuff inflation can be reduced or eliminated. In addition, by introducing the plurality of pressure values, even if there is a big error in a cuff pressure value obtained at a certain time point, it is still possible to control the cuff inflation correctly.

Claims

1. A method of inflating a cuff of a non-invasive blood pressure measurement apparatus, the method comprising the steps of:

obtaining a plurality of pressure values of the cuff at a plurality of time points;

calculating a first inflation speed parameter on the basis of the plurality of pressure values, a plurality of target pressure values of the cuff at the plurality of time points and a plurality of inflation speed parameters corresponding to each time interval between every two adjacent time points of the plurality of time points; and

inflating the cuff at a speed corresponding to the first inflation speed parameter from a last time point of the plurality of time points to a first time point after the plurality of time points.

2. A method as claimed in claim 1, wherein the step of calculating the first inflation speed parameter is performed by the following equation:

3. A method as claimed in claim 2, wherein K_i+1≧

K_i.

4. A method as claimed in claim 1, wherein each time interval between every two adjacent time points is a predefined time period.

5. A method as claimed in claim 4, wherein the predefined time period is in a range of 100 ms to 800 ms.

6. A device for inflating a cuff of a non-invasive blood pressure measurement apparatus, the device comprising:

a pressure sensor for obtaining a plurality of pressure values of the cuff at a plurality of time points;

a processor for calculating a first inflation speed parameter on the basis of the plurality of pressure values, a plurality of target pressure values of the cuff at the plurality of time points and a plurality of inflation speed parameters corresponding to each time interval between every two adjacent time points of the plurality of time points; and

an inflation unit for inflating the cuff at a speed corresponding to the first inflation speed parameter from a last time point of the plurality of time points to a first time point after the plurality of time points.

7. A device as claimed in claim 6, wherein the processor calculates the first inflation speed parameter by means of the following equation:

8. A device as claimed in claim 7, wherein K_i+1≧

K_i.

9. A device as claimed in claim 6, wherein each time interval between every two adjacent time points is a predefined time period.

10. A device as claimed in claim 9, wherein the predefined time period is in a range of 100 ms to 800 ms.