초록 ▼

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

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 "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 H2O. This constant pressure is applied for a period of time, typically 1-3 minutes. The microcontroller continuously determines mask leak as the value, fLEAK, 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.

대표청구항 ▼

1. A ventilatory assistance apparatus comprising:a controllable flow generator providing a positive pressure of breathable gas; a conduit coupled to the flow generator to receive said gas; a mask to be worn by a wearer, in turn, to receive said gas from said conduit as a desired pressure; and a cont

1. A ventilatory assistance apparatus comprising:a controllable flow generator providing a positive pressure of breathable gas; a conduit coupled to the flow generator to receive said gas; a mask to be worn by a wearer, in turn, to receive said gas from said conduit as a desired pressure; and a controller having a control of said flow generator and programmed to cause a mask-fit test pressure to be applied at the mask, said test pressure being determined as a percentile pressure of a previous ventilatory assistance session.