Surgery – Diagnostic testing – Cardiovascular
Patent
1996-07-30
1998-06-16
Cohen, Lee S.
Surgery
Diagnostic testing
Cardiovascular
600344, 600503, 600310, A61B 502
Patent
active
057661316
ABSTRACT:
To achieve a pulse wave measuring apparatus whereby the sensor unit can be easily and consistently worn against the skin surface, a wristwatch type pulse wave measuring apparatus is comprised as follows. Specifically, light transmittance plate 34 is disposed on the outside surface side of LED 31 and phototransistor 32 in sensor unit 30. Outside surface 341 of light transmittance plate 34, which is pressed against the finger, projects above the reference surface, which is outside surface 361 of sensor frame 36 surrounding light transmittance plate 34. Two body ground terminals 38 contacting the finger surface when light transmittance plate 34 is pressed tight to the finger are disposed around light transmittance plate 34; the body ground terminals 38 also project above the reference surface. However, the position of outside surfaces 381 of body ground terminals 38 is lower than the outside surface 341 of light transmittance plate 34. A supporter-like sensor unit holding band is used to hold sensor unit 30 on the finger. A thick material such as that used in diving wet suits is used for the sensor unit holding band, and comprises a middle layer of foam rubber.
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Honda Katsuyuki
Kondo Yutaka
Odagiri Hiroshi
Ono Takeshi
Cohen Lee S.
Gabrik Michael T.
Ruddy David M.
Seiko Epson Corporation
Seiko Instruments Inc.
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