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Pulse wave detecting apparatus

  • US 5,617,868 A
  • Filed: 11/22/1994
  • Issued: 04/08/1997
  • Est. Priority Date: 11/22/1994
  • Status: Expired due to Fees
First Claim
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1. An apparatus for detecting a pressure pulse wave produced from an arterial vessel of a living subject, comprising:

  • a pulse wave sensor including at least one pressure sensing element and having a press surface in which said pressure sensing element is provided, said press surface of said pulse wave sensor being adapted to be pressed against said arterial vessel of said subject via a body surface of the subject above the arterial vessel, so that the pressure sensing element detects said pressure pulse wave produced from the arterial vessel;

    a support member supporting said pulse wave sensor such that the pulse wave sensor is advanceable away from, and retractable toward, said support member, the support member being adapted to be worn on said subject such that said press surface of the pulse wave sensor is opposed to said body surface of the subject;

    an actuator located entirely on the support member provided between said support member and said pulse wave sensor, said actuator deforming, upon application thereto of an electric current, thereby providing a pressing force to press the pulse wave sensor against said arterial vessel of said subject via said body surface of the subject.

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