ELECTRONIC MANOMETER FOR APPROPRIATELY ADJUSTING INTERNAL PRESSURE OF CUFF AND METHOD FOR CONTROLLING THE SAME

• US 20090312652A1
• Filed: 07/20/2007
• Published: 12/17/2009
• Est. Priority Date: 08/03/2006
• Status: Abandoned Application

• Current Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Original Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Inventors: Yamakoshi, Takehiro, Tanaka, Shinobu, Nogawa, Masamichi, Yamakoshi, Kenichi, Sawanoi, Yukiya
• Application Number:
  US12/307,116
• Publication Number:
  US 20090312652A1
• Time in Patent Office: Days
• US Class Current: 600/493
• 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 5/02255 the pressure being controlled by plethysmographic signals, e.g. derived from optical sensors

Abstract

An electronic manometer detects pressure within a cuff at which an amplitude of change in a volume of an artery of a measurement subject becomes a maximum by detecting volume of an artery of a measurement subject while superimposing a vibration of high frequency during a period of raising the pressure to apply on the cuff or during a period of lowering after raising to greater than or equal to a systolic blood pressure of the measurement subject. The electronic manometer controls the pressure to apply on the cuff so that the volume of the artery of the measurement subject becomes constant, and measures the blood pressure of the measurement subject from an increased or decreased value of the pressure to apply.

Claims

1. An electronic manometer comprising:

a cuff attached to a blood pressure measurement site of a measurement subject;

a pressure adjustment unit for adjusting a pressure to apply on the cuff;

a pressure detection unit for detecting a pressure within the cuff;

an artery volume detection unit for detecting a volume of an artery of the measurement subject, which changes by a change in the pressure within the cuff and pulsation; and

a measurement unit for controlling the volume of the artery of the measurement subject so as to be constant by causing the pressure adjustment unit to increase or decrease the pressure to apply on the cuff based on the change in the volume of the artery of the measurement subject, and measuring a blood pressure of the measurement subject from an increased or decreased value of the pressure to apply on the cuff;

wherein

the measurement unit includes,

a pressure maintaining unit for detecting the pressure within the cuff at which an amplitude of the change in the volume of the artery of the measurement subject becomes a maximum, and maintaining the pressure,

a feedback control unit for operating the pressure adjustment unit based on the change in the volume of the artery of the measurement subject and feedback controlling so that the amplitude of the change in the volume of the artery of the measurement subject becomes a minimum, and

an extracting unit for extracting the pressure within the cuff when the amplitude of the change in the volume of the artery of the measurement subject becomes a minimum by the control from the feedback control unit as the blood pressure of the measurement subject;

the pressure maintaining unit,

causes the artery volume detection unit to detect the volume of the artery of the measurement subject while superimposing a vibration of high frequency during a period of causing the pressure adjustment unit to raise the pressure to apply on the cuff or during a period to lower after raising to greater than or equal to a systolic blood pressure of the measurement subject to detect the pressure within the cuff at which the amplitude of the change in the volume of the artery of the measurement subject becomes a maximum, and

detects the pressure within the cuff at which the amplitude of the change in the volume of the artery of the measurement subject becomes a maximum at a start of measurement of the blood pressure by the measurement unit and at a predetermined time other than at the start of measurement.

3. The electronic manometer according to claim 1, wherein the predetermined time is when the blood pressure measured by the measurement unit exceeds a predetermined value or becomes lower than a specific value.

4. The electronic manometer according to claim 1, wherein the predetermined time is when an amount of change in the volume of the artery of the measurement subject detected by the artery volume detection unit exceeds a constant value during the measurement of the blood pressure by the measurement unit.

5. The electronic manometer according to claim 1, wherein the predetermined time is when an amount of change in the pressure within the cuff detected by the pressure detection unit exceeds a certain value during the measurement of the blood pressure by the measurement unit.

6. The electronic manometer according to claim 1, further comprising an operation unit for accepting an operation from outside;

wherein

the predetermined time is when the operation is made to the operation unit.

7. The electronic manometer according to claim 1, wherein the pressure maintaining unit detects the pressure within the cuff at which the amplitude of the change in the volume of the artery of the measurement subject becomes a maximum based on a detection result of the volume of the artery of the measurement subject by the artery volume detection unit in a period the pressure adjustment unit adjusts the pressure to apply on the cuff by one heart beat based on the control by the feedback control unit.

2. (canceled)

8. A method of controlling an electronic manometer including a cuff attached to a blood pressure measurement site of a measurement subject, the method causing the electronic manometer to execute the steps of:

detecting a pressure within the cuff at which an amplitude of change in a volume of an artery of the measurement subject becomes a maximum;

maintaining the detected pressure within the cuff;

adjusting a pressure to apply on the cuff based on the change in the volume of the artery of the measurement subject while performing a feedback control so that the amplitude of the change in the volume of the artery of the measurement subject becomes a minimum; and

extracting the pressure within the cuff when the amplitude of the change in the volume of the artery of the measurement subject becomes a minimum by the feedback control as the blood pressure of the measurement subject;

wherein

the step of detecting the pressure within the cuff is executed at a start of blood pressure measurement in the electronic manometer and at a predetermined time other than at the start of measurement, and is a step of detecting the volume of the artery of the measurement subject while superimposing a vibration of high frequency during a period of raising the pressure to apply on the cuff or during a period of lowering after raising the pressure to apply on the cuff to greater than or equal to a systolic blood pressure of the measurement subject to detect the pressure within the cuff at which the amplitude of the change in the volume of the artery of the measurement subject becomes a maximum.