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Hemodynamic Detection of Circulatory Anomalies

  • US 20100016731A1
  • Filed: 04/06/2009
  • Published: 01/21/2010
  • Est. Priority Date: 07/15/2008
  • Status: Abandoned Application
First Claim
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1. A method for detecting the presence of a right-to-left pulmonary shunt in a patient, the improvement comprising the steps:

  • providing an elongate air conduit having proximal end configured to be positioned within the mouth of the patient to receive exhaled breath, and having a distal end configured for air pressure secure attachment with a pressure transducer;

    providing an indicator delivery system having an outlet located in a vein of the patient in blood flow communication with the right side of the heart of the patient and actuateable by an operator to inject a predetermined amount of metabolically compatible indicator into the vein for travel to the right side of the heart of the patient;

    providing an indicator sensor located with respect to arterial vasculature and having an output corresponding with the instantaneous concentration of indicator at such vasculature; and

    providing a monitor/controller having a display and supporting the pressure transducer in attachment with the air conduit distal end and having a pressure output signal, responsive to such pressure output signal reaching and at least maintaining a predetermined corresponding pressure threshold value to provide a visual representation thereof at the display and commence a test timing, responsive to the test timing to cue the operator to actuate the indicator delivery system, responsive to the sensor output to determine whether a shunt is present.

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