Blood pressure monitor system
First Claim
1. A blood pressure monitor system comprising:
- a pressure sensor having a press surface and including at least one pressure sensing element provided in said press surface;
a pressing device which presses said pressure sensor against an arterial vessel of a living subject via a body surface of the subject so that said pressure sensing element of the pressure sensor measures a pressure value at said body surface of the subject;
pressing-force determining means for determining an optimum pressing force of said pressing device at which a portion of a wall of said arterial vessel of the subject is flattened under said pressure sensor pressed by the pressing device;
inflection-point determining means for changing pressing forces of said pressing device applied to said pressure sensor, and determining a point of inflection of a curve representing a relationship between the changed pressing forces of the pressing device and pressure values measured by the pressure sensor at said body surface of the subject;
correction-value determining means for determining a correction value based on the pressure value of the determined point of inflection; and
blood-pressure determining means for operating said pressing device to maintain the determined optimum pressing force and press said pressure sensor against said arterial vessel of the subject via said body surface of the subject, and continuously determining intra-arterial blood pressure values of the arterial vessel of the subject by subtracting said correction value from the pressure values measured by the pressure sensor at the body surface of the subject.
3 Assignments
0 Petitions
Accused Products
Abstract
A blood pressure monitor system including a pressure sensor having a press surface and including pressure sensing elements provided in the press surface; a pressing device which presses the pressure sensor against an artery via a body surface so that each pressure sensing element measures a pressure value at the body surface; a first device for determining an optimum pressing force of the pressing device at which a portion of a wall of the artery is flattened under the pressure sensor; a second device for changing pressing forces of the pressing device, and determining a point of inflection of a curve representing a relationship between the changed pressing forces and pressure values measured by the pressure sensor at the body surface; a third device for determining a correction value based on the pressure value of the determined point of inflection; and a blood-pressure determining device for operating the pressing device to maintain the determined optimum pressing force and press the pressure sensor against the artery via the body surface, and continuously determining intra-arterial blood pressure values of the artery by subtracting the correction value from the pressure values measured by the pressure sensor at the body surface.
21 Citations
13 Claims
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1. A blood pressure monitor system comprising:
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a pressure sensor having a press surface and including at least one pressure sensing element provided in said press surface; a pressing device which presses said pressure sensor against an arterial vessel of a living subject via a body surface of the subject so that said pressure sensing element of the pressure sensor measures a pressure value at said body surface of the subject; pressing-force determining means for determining an optimum pressing force of said pressing device at which a portion of a wall of said arterial vessel of the subject is flattened under said pressure sensor pressed by the pressing device; inflection-point determining means for changing pressing forces of said pressing device applied to said pressure sensor, and determining a point of inflection of a curve representing a relationship between the changed pressing forces of the pressing device and pressure values measured by the pressure sensor at said body surface of the subject; correction-value determining means for determining a correction value based on the pressure value of the determined point of inflection; and blood-pressure determining means for operating said pressing device to maintain the determined optimum pressing force and press said pressure sensor against said arterial vessel of the subject via said body surface of the subject, and continuously determining intra-arterial blood pressure values of the arterial vessel of the subject by subtracting said correction value from the pressure values measured by the pressure sensor at the body surface of the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification