Mechanical ventilation in the presence of sleep disordered breathing

US8011365B2 · kind B2 · utility

Assignee

• ResMed Corp. · AU

Inventors

• Robert Douglas · Oyster Bay Cove, US
• Anthony John Ujhazy · Chatswood, AU
• Glenn Richards · Caledonia, US
• Mark David Buckley · Laatzen, DE
• Klaus Henry Schindhelm · Hornsby, AU

Key dates

• Filing date: Dec 24, 2004
• Grant date: Sep 6, 2011
• Expiry date: Mar 15, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/15
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method for controlling operation of a CPAP apparatus. The apparatus has a blower (2), a patient interface (6), an air delivery conduit (8) for delivering air from the blower (2) to the patient interface (6), a sensor (4p) for determining the pressure in the patient interface (6), and a control mechanism (15) that causes air to be delivered at a desired pressure to the patient interface (6) and that detects transitions between inhalation and exhalation of a respiratory cycle of a patient in order to synchronise the blower output with the patient's efforts. In one form the CPAP apparatus provides pressure in accordance with a bi-level waveform with at least one characterising parameter of the waveform being automatically adjusted in accordance with indications of sleep disordered breathing. The indications of sleep disordered breathing can be one or more of snoring, apnea, hypopnea, and flow limitation.