Resmed Limited

Redmed Limited

Gregory Newton Brewer

Steven Paul Farrugia

Chinmayee Somaiya

Gregory Alan Colla

Anthony John Ujhazy

CPAP treatment apparatus (), as one form of positive pressure ventilatory assistance, is disclosed. A turbine/blower (), operated by a mechanically coupled electrical motor (), receives air or breathable gas at an inlet () thereof, and supplies the breathable gas at a delivery pressure to a delivery tube/hose () having connection at the other end thereof with a nose mask (). A microcontroller () has an operational 'Mask-Fit' mode. An initial constant pressure level is applied by the blower () to the mask (). If the functional mode is a Manual mode, then the mask-fit test pressure is the current 'set' pressure. If the functional mode is the Automatic Titration mode, the mask-fit test pressure is the 95th percentile pressure of the previous session, otherwise it is the base treatment pressure, e.g. 10-12 cm HO. This constant pressure is applied for a period of time, typically 1-3 minutes. The microcontroller () continuously determines mask leak as the value, f, from a flow sensor (), comparing this to a threshold, and providing the patient with a visual indication of degree of leak. In this way the patient can manipulate the mask to ensure correct fitting as indicated by the appropriate message or indication.

Determination of mask fitting pressure and correct mask fit

Methods and apparatus for detection and treatment of respiratory disorders using implanted devices are described. In one form, afferent nerves are electrically or electro-mechanically stimulated to increase the tone of upper airway muscles. Detection of respiratory disorders is carried out using electrodes implanted in sub-pectoral regions. Open and closed airway apneas are distinguished using a combination of acoustic detectors and electrical transducers.

Method and apparatus for detection and treatment of respiratory disorder by implantable device

A method for determining a mask-fit test pressure to be applied to a wearer's mask by ventilatory assistance apparatus includes adaptively determining the mask-fit pressure from prior use.

A CPAP treatment apparatus, as one form of positive pressure ventilatory assistance, includes a turbine/blower, operated by a mechanically coupled electrical motor that receives air or breathable gas at an inlet thereof, and supplies the breathable gas at a delivery pressure to a delivery tube/hose having a connection at the other end thereof with a nose mask. A microcontroller has an operational &ldquo;Mask-Fit&rdquo; mode. An initial constant pressure level is applied by the blower to the mask. If the functional mode is a manual mode, then the mask-fit test pressure is the current 'set' pressure. If the functional mode is the automatic titration mode, the mask-fit test pressure is the 95 percentile pressure of the previous session, otherwise it is the base treatment pressure, e.g. 10-12 cm H O. This constant pressure is applied for a period of time, typically 1-3 minutes. The microcontroller continuously determines mask leak as the value, f , from a flow sensor, comparing this to a threshold, and providing the patent with a visual indication of degree of leak. In this way the patient can manipulate the mask to ensure correct fitting as indicated by the appropriate message or indication.

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Lewisham, Australia

Gregory Newton Brewer