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Apparatus and method for non-invasively measuring cardiac output

  • US 6,306,098 B1
  • Filed: 12/19/1996
  • Issued: 10/23/2001
  • Est. Priority Date: 12/19/1996
  • Status: Expired due to Term
First Claim
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1. Apparatus for non-invasive determination of cardiac output, comprising:

  • an airway conduit adapted for communication with a patient'"'"'s respiratory system;

    an inspiratory conduit interconnected to said airway conduit;

    an expiratory conduit interconnected to said airway conduit;

    a volume-adjustable deadspace comprising a plurality of shunt lines positioned in fluid communication between said expiratory conduit and said inspiratory conduit, each said shunt line including a selectively actuatable shunt valve providing movement of exhaled gas between said inspiratory conduit and said expiratory conduit; and

    detection apparatus positioned in proximity to said airway conduit for detecting a change in concentration of at least one gas and in gas flow relating to said patient'"'"'s respiratory system.

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