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:
Jan. 11, 2005
Filed:
May. 05, 2000
Michael Berthon-jones, Leonay, AU;
Nicola Frances Wickham, Five Dock, AU;
Michael Berthon-Jones, Leonay, AU;
Nicola Frances Wickham, Five Dock, AU;
ResMed Limited, North Ryde, AU;
Abstract
Methods and apparatus for detecting the occurrence of a potential or actual overpressure during assisted ventilation are described. A blower () supplies pressurized gas to a conduit (), and in turn to a patient mask () for connection with the entrance of a patient's airways. A pressure sensor () detects the delivered pressure in the mask (), which is provided to a controller (). The controller () has operation over the blower () by way of a servo () and motor (). The controller () determines a relatively longterm average of the pressure signal, and compares it against a threshold value (). If the threshold value is approached or exceeded, the controller () controls the blower () and thus the supplied pressure to the patient. The effect of the control can be to limit or reduce the supplied gas pressure. The relatively longterm average can be of the order of minutes, or taken over ten or more breaths.