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Apparatus for monitoring respiration and cardiac activity

  • US 4,884,578 A
  • Filed: 08/10/1988
  • Issued: 12/05/1989
  • Est. Priority Date: 10/12/1985
  • Status: Expired due to Term
First Claim
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1. An apparatus for monitoring respiration and cardiac activity of a patient, comprising:

  • bed means for supporting thereon a patient to be monitored, the bed means having a base and an edge;

    mounting means for mounting the bed means for polydirectional movement about a initial position thereof, the mounting means comprising a curved point-contact bearing provided on the base of the bed means and directed downwardly therefrom, said curved point-contact bearing being supported at a bearing point thereof by support means;

    restoring means for restoring the bed means to said initial position, the restoring means comprising a weight provided inside the curved point-contact bearing and arranged such that the position of a common center of gravity of the bed means, the curved point-contact bearing and said weight is located for biasing the bed means towards said initial position when disturbed therefrom;

    first sensor means located proximate said curved point-contact bearing bearing point and oriented in a first direction for sensing movement of the bed means in said first direction caused by heartbeat and respiration pulses originating from a patient being monitored; and

    at least one second sensor means provided on said bed means and oriented towards the edge of the bed means in a second direction different from said first direction for sensing movement of the bed means in said second direction caused by heartbeat and respiration pulses originating from a patient being monitored.

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