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Methods and systems for an optimized proportional assist ventilation

  • US 9,993,604 B2
  • Filed: 04/27/2012
  • Issued: 06/12/2018
  • Est. Priority Date: 04/27/2012
  • Status: Active Grant
First Claim
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1. A ventilator system comprising:

  • a pressure generating system, wherein the pressure generating system generates a flow of breathing gas;

    a ventilation tubing system including a patient interface for connecting the pressure generating system to a patient;

    one or more sensors operatively coupled to at least one of the pressure generating system, the patient, and the ventilation tubing system, wherein the one or more sensors generate output indicative of an inspiration flow;

    a support module that receives an initial percent support setting and a desired patient effort range, wherein the support module calculates at least one adjusted percent support setting based at least on determining that a current patient effort falls outside of the desired patient effort range, wherein the at least one adjusted percent support setting is calculated to cause the current patient effort to fall within the desired patient effort range when utilized to calculate an adjusted target airway pressure for delivery to the patient; and

    an optimized proportional assist (OPA) module, the OPA module calculates an initial target airway pressure based at least on the initial percent support setting, calculates at least one adjusted target airway pressure based at least on the at least one adjusted percent support setting, and utilizes the output indicative of the inspiration flow to determine a patient trigger for delivery of a breath to the patient,wherein the pressure generating system delivers the initial target airway pressure to the patient in response to receiving the initial target airway pressure and delivers the adjusted target airway pressure to the patient in response to receiving the adjusted target airway pressure affecting patient effort.

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