Apparatus for determining blood pressure

• US 20100249617A1
• Filed: 03/31/2009
• Published: 09/30/2010
• Est. Priority Date: 03/31/2009
• Status: Abandoned Application

• Current Assignee: Hong Kong Applied Science And Technology Research Institute Co., Ltd.
• Original Assignee: Hong Kong Applied Science And Technology Research Institute Co., Ltd.
• Inventors: To, Kwan Wai Raymond, Luk, Chi-Tin, Leung, Lap Wai Lydia, Chung, Chang Hwa Tom
• Application Number:
  US12/415,280
• Publication Number:
  US 20100249617A1
• Time in Patent Office: Days
• US Class Current: 600/495
• CPC Class Codes: A61B 5/022 by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
• CPC Class Codes: A61B 5/7475 User input or interface means, e.g. keyboard, pointing device, joystick

Abstract

An apparatus for determining the blood pressure of a patient which allows the patient to first measure his measured blood pressure using a blood pressure measuring device and then, at a later time, estimate his current blood pressure using a blood pressure calculating device that includes a mathematical model for estimating blood pressure based on a current change in blood pressure induced by a heart beat and the previously measured blood pressure. The apparatus includes a transmitter device that detects the presence of a blood pressure calculating device connected to or in proximity of the blood pressure measuring device and transmits the previously measured blood pressure value to the blood pressure calculating device.

Claims

1. An apparatus for determining blood pressure of a person, comprising:

a blood pressure measuring device that measures a blood pressure value of a patient at a first time,

a storage device that stores the blood pressure value that is measured,

a blood pressure calculating device; and

a transmitter device that automatically detects presence of the blood pressure calculating device and transmits the blood pressure value that is measured and stored to the blood-pressure calculating device at a second time.

2. The apparatus of claim 1 wherein the blood pressure measuring device includes an inflatable cuff that restricts blood flow for measuring the blood pressure value.

3. The apparatus of claim 1 wherein the blood-pressure calculating device measures change in arterial blood induced by a heart beat, the blood pressure calculating device including a receiver that receives the blood pressure value that is measured and transmitted and a second storage device that stores the blood pressure value that is measured in the blood pressure calculating device.

4. The apparatus of claim 3 wherein the blood pressure calculating device includes a plethysmograph that measures change in arterial blood volume induced by a heart beat.

5. The apparatus of claim 3 wherein the blood pressure calculating device further includes a processor that calculates blood pressure of the patient at a third time using a mathematical model that includes the change in arterial blood induced by a heart beat and the blood pressure value that is measured.

6. The apparatus of claim 3 wherein the blood pressure calculating device further includes a processor that determines pulse transit time of an arterial pressure wave induced by a heart beat at a third time, and that calculates blood pressure of the patient using a mathematical model that includes the pulse transmit time determined at the third time and the blood pressure value that is measured and calculated at the first time.

7. The apparatus of claim 3 wherein the blood pressure calculating device is a battery operated portable device.

8. The apparatus of claim 1 wherein the blood pressure measuring device does not include a processor that uses a mathematical model or calculation that includes a change in arterial blood induced by heart beat and the blood pressure value that is measured.

9. The apparatus of claim 1 wherein only the blood pressure value that is measured is transmitted between the blood pressure measuring device and the blood pressure calculating device.

10. The apparatus of claim 1 wherein the blood pressure value that is measured consists of systolic and/or diastolic blood pressure.