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MECHANICAL VENTILATION IN THE PRESENCE OF SLEEP DISORDERED BREATHING

  • US 20070215146A1
  • Filed: 12/24/2004
  • Published: 09/20/2007
  • Est. Priority Date: 12/29/2003
  • Status: Active Grant
First Claim
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1. In a CPAP apparatus having (i) a blower, (ii) a patient interface for a patient, (iii) an air delivery conduit for delivering air from the blower to the patient interface, (iv) a sensor adapted to determine the pressure in the patient interface, (v) a sensor adapted to determine the flow of air to the patient, (vi) a synchrony module programmed to determine transitions between inspiration and expiration of a patient'"'"'s breathing cycle from at least one sensor and (vii) a control mechanism programmed to provide a supply of air at positive pressure in accordance with a predetermined pressure-time template, a method of controlling the blower operation comprising the steps of:

  • automatically determining at least one index indicative of the presence of sleep disordered breathing from the pressure or flow sensors, automatically determining a treatment pressure in accordance with the index of sleep disordered breathing, setting at least one characterising parameter of the pressure-time template to the treatment pressure, controlling the blower to deliver a supply of air at positive pressure to the patient in accordance with the template and in synchrony with the patient'"'"'s breathing cycles as determined by the synchrony module.

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