| 摘要 |
A method and a CPAP apparatus (10) for characterizing a plurality of different mask systems (14), e.g., masks and hoses, are provided. The CPAP apparatus (10) can be calibrated for different mask systems (14) and hoses (16) by including sensors (13,15) configured to measure flow and pressure at a flow generator (12) of the CPAP apparatus (10). When the flow generator (12) is fitted to a new mask system (14), or any changes are made to an existing mask system (14), mask or patient interface (34) and/or hose (16), a method of calibrating the flow generator (12) for the new mask system (14), mask (34) and/or hose (16) is provided. The method includes determining air flow characteristics of the hose (16) using flow measurements made during a first test period when the flow through the mask system (14) is open, measuring or estimating pressure in the mask system (14) during a second test period when the flow through the mask system (14) is blocked and determining air flow characteristics of the diffuser (36) of the mask system (14) using the air flow characteristics of the air delivery hose (16) determined during the first test period and the pressure measurements made during the second test period.
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