Portable device for measuring blood pressure and method therefor

• US 8,795,185 B2
• Filed: 09/30/2009
• Issued: 08/05/2014
• Est. Priority Date: 11/27/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Cho, Jae-Geol
• Primary Examiner(s): Kahelin, Michael
• Assistant Examiner(s): TRAN, THO Q
• Application Number:
  US12/570,873
• Publication Number:
  US 20100130876A1
• Time in Patent Office: 1,770 Days
• Field of Search: 600/485, 600/490, 600/491, 600/492, 600/495, 600/496, 600/500, 600/501, 600/502, 600/503, 600/481, 600/480
• US Class Current: 600/483
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/02125 of pulse wave propagation time
• CPC Class Codes: A61B 5/022 by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
• CPC Class Codes: A61B 5/02241 of small dimensions, e.g. adapted to fingers
• CPC Class Codes: A61B 5/0285 Measuring or recording phase velocity of blood waves
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/6824 Arm or wrist
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6838 Clamps or clips
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal

Abstract

A portable blood pressure measuring apparatus and a method therefor are provided. In the portable blood pressure measuring apparatus, a blood pressure measurer measures a wrist or finger blood pressure being an arterial pressure at a wrist or a finger, a Pulse Wave Velocity (PWV) measurer measures a PWV, a controller controls compensation of the wrist or finger blood pressure using the PWV so that the wrist or finger blood pressure corresponds to a brachial blood pressure, and a display displays the compensated wrist or finger blood pressure.

Claims

1. A portable blood pressure measuring apparatus comprising:

a blood pressure measurer for measuring a wrist or finger blood pressure, wherein the wrist or finger blood pressure is an arterial pressure measured at a wrist or a finger;

a Pulse Wave Velocity (PWV) measurer for measuring a PWV;

a controller for controlling compensation of the wrist or finger blood pressure using the measured PWV so that the wrist or finger blood pressure corresponds to a brachial blood pressure; and

a display for displaying the compensated wrist or finger blood pressure,

wherein the controller controls the compensation of the wrist or finger blood pressure using one of the following equations;

P_brachial=a+b×

P_{wrist or finger}+c×

PWV

P_brachial=a+b×

P_{wrist or finger}+c×

PWV+d×

PWV²

P_brachial=a+b×

P_{wrist or finger}+c×

PWV+d×

PWV²+e×

PWV³

where P_brachial is a brachial blood pressure P_{wrist or finger} is a blood pressure measured at the wrist or finger, PWV is a PWV, and a, b, c, d and e are empirical constants for compensating the wrist or finger blood pressure value.

2. The portable blood pressure measuring apparatus of claim 1, wherein the PWV measurer includes an ElectroCardioGram (ECG) electrode portion for measuring an ECG signal.

3. The portable blood pressure measuring apparatus of claim 2, wherein the ECG electrode portion includes a first electrode positioned inside a cuff of the portable blood pressure measuring apparatus and a second electrode positioned outside the cuff.

4. The portable blood pressure measuring apparatus of claim 1, further comprising a memory for pre-storing the equation used by the controller to control the compensation of the wrist or finger blood pressure.

5. The portable blood pressure measuring apparatus of claim 1, wherein the PWV measurer includes an optical sensor for measuring a PhotoPlethysnoGraphy signal.

6. The portable blood pressure measuring apparatus of claim 5, wherein the optical sensor includes a light source and a light receiving device, and the optical sensor is positioned inside a cuff of the portable blood pressure measuring apparatus.

7. The portable blood pressure measuring apparatus of claim 5, wherein the optical sensor includes a light source and a light receiving device provided at an additional device configured to attach to the finger.