Pressure pulse wave transmitting sheet used with pressure pulse wave sensor
First Claim
1. A pressure pulse wave transmitting sheet for being interposed between a skin surface of a living subject and a pressure pulse wave sensor set on the skin surface in pressed contact therewith, the sensor having a press surface in which an array of pressure sensing elements are provided and which is pressed against the skin surface so that a wall of an artery of the subject underlying the skin surface is partially flattened and that at least one of the pressure sensing elements detects a pressure pulse wave which is produced from the artery in synchronism with a heartbeat of the subject and is transmitted through the flattened wall of the artery and the skin surface, to the press surface of the sensor via the sheet,said pressure pulse wave transmitting sheet being formed of an elastic material having a hardness ranging from about 1 degree to about 15 degrees measured by a Japanese Industrial Standard (JIS) A-type spring-using hardness measuring device, said sheet having a plurality of first parallel straight lines which are provided on one of opposite surfaces of the sheet, and a plurality of second parallel straight lines each of which is provided on said one surface of the sheet so as to perpendicularly intersect said first straight lines, each of said first straight lines being indicated by a corresponding one of a first series of different indicias provided on said one surface of the sheet, each of said second straight lines being indicated by a corresponding one of a second series of different indicias provided on said one surface of the sheet.
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Accused Products
Abstract
A pressure pulse wave transmitting sheet for being interposed between a skin surface of a living subject such as a patient and a pressure pulse wave sensor set on the skin surface in pressed contact therewith, the sensor having a press surface in which at least one pressure sensing element is provided and which is pressed against the skin surface so that the at least one pressure sensing element detects a pressure pulse wave transmitted from an artery of the subject underlying the skin surface, to the press surface via the sheet, the sheet being formed of an elastic material having a hardness substantially equal to a hardness of human being'"'"'s skin.
67 Citations
15 Claims
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1. A pressure pulse wave transmitting sheet for being interposed between a skin surface of a living subject and a pressure pulse wave sensor set on the skin surface in pressed contact therewith, the sensor having a press surface in which an array of pressure sensing elements are provided and which is pressed against the skin surface so that a wall of an artery of the subject underlying the skin surface is partially flattened and that at least one of the pressure sensing elements detects a pressure pulse wave which is produced from the artery in synchronism with a heartbeat of the subject and is transmitted through the flattened wall of the artery and the skin surface, to the press surface of the sensor via the sheet,
said pressure pulse wave transmitting sheet being formed of an elastic material having a hardness ranging from about 1 degree to about 15 degrees measured by a Japanese Industrial Standard (JIS) A-type spring-using hardness measuring device, said sheet having a plurality of first parallel straight lines which are provided on one of opposite surfaces of the sheet, and a plurality of second parallel straight lines each of which is provided on said one surface of the sheet so as to perpendicularly intersect said first straight lines, each of said first straight lines being indicated by a corresponding one of a first series of different indicias provided on said one surface of the sheet, each of said second straight lines being indicated by a corresponding one of a second series of different indicias provided on said one surface of the sheet.
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10. An apparatus for detecting a pressure pulse wave of a living subject, comprising:
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a pressure pulse wave sensor adapted to be set on a skin surface of said subject in pressed contact therewith, said sensor having a press surface in which an array of pressure sensing elements are provided; a pressure pulse wave transmitting sheet adapted to be interposed between said skin surface of said subject and said press surface of said pressure pulse wave sensor, said sheet being formed of an elastic material having a hardness ranging from about 1 degree to about 15 degrees measured by a Japanese Industrial Standard (JIS) A-type spring-using hardness measuring device; and pressing means having an actuator for pressing said sensor against said skin surface so that a wall of an artery of said subject underlying said skin surface is partially flattened and that at least one of said pressure sensing elements detects a pressure pulse wave which is produced from said artery in synchronism with a heartbeat of said subject and is transmitted through the flattened wall of said artery and said skin surface, to said press surface of said sensor via said sheet. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification