Blood pressure monitoring apparatus

• US 20020002339A1
• Filed: 05/16/2001
• Published: 01/03/2002
• Est. Priority Date: 05/16/2000
• Status: Active Grant

• Current Assignee: Nihon Kohden Corporation
• Original Assignee: Nihon Kohden Corporation
• Inventors: Tanaka, Rie, Sugo, Yoshihiro, Hyogo, Mitsushi
• Granted Patent: US 6,547,740 B2
• Time in Patent Office: Days
• US Class Current: 600/485
• 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

Abstract

The blood pressure monitoring apparatus includes blood pressure measuring device for measuring the blood pressure employing a cuff, pulse wave propagation time measuring device for measuring the pulse wave propagation time, hemodynamics measuring device for measuring the hemodynamics, and control device for controlling the blood pressure measuring device on the basis of a change in pulse wave propagation time measured by the pulse wave propagation time measuring device and a change in hemodynamics measured by the hemodynamics measuring device, wherein the control device controls the blood pressure measuring device to measure the blood pressure on the basis of the amount of change and change trend in the pulse wave propagation time measured by the pulse wave propagation time measuring device, and the amount of change and change trend in the hemodynamics measured by the hemodynamics measuring device.

Claims

1. A blood pressure monitoring apparatus comprising:

blood pressure measuring means for measuring the blood pressure employing a cuff;

pulse wave propagation parameter measuring means for measuring the pulse wave propagation parameter;

hemodynamics measuring means for measuring the hemodynamics, and

control means for controlling said blood pressure measuring means on the basis of a change in pulse wave propagation parameter measured by said pulse wave propagation parameter measuring means and a change in hemodynamics measured by said hemodynamics measuring means,

wherein said control means controls said blood pressure measuring means to measure the blood pressure on the basis of the amount of change and discriminated change in the pulse wave propagation parameter measured by said pulse wave propagation parameter measuring means, and the amount of change and discriminated change in the hemodynamics measured by said hemodynamics measuring means.

2. The blood pressure monitoring apparatus according to claim 1, wherein said control means controls said blood pressure measuring means on the basis of a comparison between a pulse wave propagation parameter change threshold memorized to monitor the amount of change in said pulse wave propagation parameter and the amount of change in the pulse wave propagation parameter measured by said pulse wave propagation parameter measuring means and a comparison between a hemodynamics change threshold memorized to monitor the amount of change in said hemodynamics and the amount of change in the hemodynamics measured by said hemodynamics measuring means.

3. The blood pressure monitoring apparatus according to claim 2, wherein said control means updates said pulse wave propagation parameter change threshold.

6. The blood pressure monitoring apparatus according to claim 1, wherein said hemodynamics measuring means measures at least one of a heart rate, a pulse wave amplitude, and a DC component of pulse wave, and said control means controls the blood pressure measuring means on the basis of at least one of said heart rate measured, said pulse wave amplitude, and said DC component of pulse wave.

7. The blood pressure monitoring apparatus according to claim 6, wherein said control means controls the blood pressure measuring means on the basis of a pulsation rate fluctuation rate calculated from the changes in the amplitude of pulse wave and the DC component of pulse wave measured by hemodynamics measuring means.

8. The blood pressure monitoring apparatus according to claim 3, wherein said control means updates said pulse wave propagation parameter change threshold on the basis of at least one of the change in pulse wave propagation parameter, the change in heart rate, and the pulsation rate fluctuation rate.

4. A blood pressure monitoring apparatus comprising:

blood pressure measuring means for measuring the blood pressure employing a cuff;

pulse wave propagation parameter measuring means for measuring the pulse wave propagation parameter;

hemodynamics measuring means f or measuring the hemodynamics; and

control means for controlling said blood pressure measuring means on the basis of a change in pulse wave propagation parameter measured by said pulse wave propagation parameter measuring means and a change in hemodynamics measured by said hemodynamics measuring means,

wherein said control means compares between a pulse wave propagation parameter change threshold memorized to monitor the amount of change in pulse wave propagation parameter and the amount of change in pulse wave propagation parameter measured by said pulse wave propagation parameter measuring means and detect the change trend in said measured pulse wave propagation parameter, compares between a hemodynamics change threshold memorized to monitor the amount of change in the hemodynamics and the amount of change in hemodynamics measured by said hemodynamics measuring means, detects the change trend in said hemodynamics measured, and updates said pulse wave propagation parameter change threshold on the basis of the results of two comparisons with said thresholds and the detected change trends.

5. The blood pressure monitoring apparatus according to claim 4, wherein said control means controls said blood pressure measuring means to measure the blood pressure on the basis of a comparison between said updated pulse wave propagation parameter change threshold and the pulse wave propagation parameter measured by said pulse wave propagation parameter measuring means.