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SYSTEM FOR PROVIDING FLOW-TARGETED VENTILATION SYNCHRONIZED TO A PATIENT'S BREATHING CYCLE

  • US 20080178880A1
  • Filed: 01/26/2007
  • Published: 07/31/2008
  • Est. Priority Date: 01/26/2007
  • Status: Active Grant
First Claim
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1. A method for delivering a flow of oxygen-containing gas to the airway of a spontaneously-breathing patient, said method comprising:

  • providing a tube to deliver a flow of oxygen-containing gas into a patient'"'"'s airway without interfering with a patient'"'"'s spontaneous respiration around the tube;

    detecting a physical property of a patient'"'"'s respiratory cycle; and

    supplying a flow of oxygen-containing gas varying over each inspiratory and expiratory phase of the respiratory cycle in a predetermined non-constant flow waveform synchronized with the respiratory cycle to augment the patient'"'"'s spontaneous respiration, said waveform including a positive flow beginning at the onset of the patient'"'"'s inspiratory phase at a flow rate sufficient to significantly mitigate the airway pressure the patient must generate during spontaneous breathing and thereby reduce the patient'"'"'s work of breathing, said waveform further including a positive flow during at least a portion of the patient'"'"'s expiratory phase at a flow rate sufficient to wash carbon dioxide from the patient'"'"'s airway.

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