| 摘要 |
An interface arrangement is disclosed for ensuring proper dosing as well as achieving a safe operation and handling of a dry powder inhaler (DPI) used for administration of a powder to be inhaled. The interface of the present invention primarily handles the loading of a cassette (4) carrying pre-metered doses into the dry powder inhaler (8). An important characteristic is that the interface by utilizing a particular coding prevents a user from loading a cassette not containing the proper powder. Additionally the interface informs a user when a new mouthpiece has to be replaced after being used for a pre-defined number of inhalation operations. Additionally the interface informs a user when a present cassette has delivered its last dose and should be exchanged. Also information on the number of further cassettes already utilized will control that another cassette still is permitted to be loaded. If this counter exceeds a pre-defined number of used cassettes the inhaler then is by definition worn out, whereby the present dry powder inhaler has to be scrapped. In that case the last cassette will not be able to be released from the inhaler device but will accompany the inhaler when it is discarded.
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