The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2013
Filed:
Sep. 28, 2005
Michael Berthon-jones, Leonay, AU;
Steven Paul Farrugia, Lugarno New South Wales, AU;
Michael Berthon-Jones, Leonay, AU;
Steven Paul Farrugia, Lugarno New South Wales, AU;
ResMed Limted, , AU;
Abstract
CPAP treatment apparatus is disclosed having a controllable flow generator () operable to produce breathable gas at a treatment pressure elevated above atmosphere to a patient by a delivery tube () coupled to a mask () having connection with a patient's airway. A sensor () generates a signal representative of patient respiratory flow, that is provided to a controller (). The controller () is operable to determine the occurrence of an apnea from a reduction in respiratory airflow below a threshold, and if an apnea has occurred, to determine the duration of the apnea and to cause the flow generator () to increase the treatment pressure. In one preferred form the increase in pressure is zero if the treatment pressure before the apnea exceeds a pressure threshold. Below the pressure threshold the increase in pressure is an increasing function of the duration of the apnea multiplied by the difference between the pressure threshold and the current treatment pressure.