RESPIRATORY THERAPY DEVICES
An oscillatory respiratory therapy device 100 has an opening 8 to atmosphere through which air passes to the user. The device has a visual indicator 20 including a paper indicator 25 and a dye reservoir 29 mounted at the opening. Before use, the opening 8 is covered by a removable cover strip 21 that prevents air flowing through the opening. The cover strip 21 is attached to the dye reservoir 29 so that the reservoir is pulled against the paper indicator 25 when the cover strip is removed, thereby the device to be used. This causes dye to flow gradually from the reservoir 29 and spread outwardly across the paper indicator 25, which is marked to indicate duration of use.
1 - 10 . (canceled)
11 . A respiratory therapy device having an inlet through which a user breathes, an opening to atmosphere, and a displaceable member that is displaced by breathing through the device and is arranged to produce an oscillating resistance to breathing through the device, characterised in that the therapy device includes a visual indicator having a part that prevents effective use of the device, and that the part is actuable both to enable use of the device and to initiate a gradual change in appearance of the visual indicator over time so as thereby to provide an indication to the user of the time from first use of the device.
12 . A respiratory therapy device according to claim 11 , characterised in that the actuable part is a removable cover strip.
13 . A respiratory therapy device according to claim 11 , characterised in that the visual indicator ( 20 ) includes a dye reservoir and a paper indicator, and that the actuable part is arranged to bring the dye in the reservoir into contact with the paper indicator when the part is actuated.
14 . A respiratory therapy device according to claim 13 , characterised in that the dye reservoir is arranged centrally of the paper indicator so that dye in the reservoir spreads outwardly of the paper indicator when the dye contacts the paper indicator.
15 . A respiratory therapy device according to claim 13 , characterised in that dye reservoir is positioned on one side of the paper indicator and is attached with the actuable part positioned on the opposite side of the paper indicator such that, when the actuable part is pulled away from the paper indicator, it displaces the dye reservoir towards the paper indicator.
16 . A respiratory therapy device according to claim 11 , characterised in that the visual indicator is arranged to indicate a time of up to six months from first use of the device.
17 . A respiratory therapy device according to claim 11 , characterised in that the actuable part is located to restrict flow through the opening to atmosphere.
18 . A method of preparing a respiratory therapy device for use, the respiratory therapy device having an inlet through which the user breathes, an opening to atmosphere, a displaceable member that is displaced by breathing through the device and is arranged to produce an oscillating resistance to breathing through the device, characterised in that the therapy device includes a visual indicator having a part that prevents effective use of the device, and that the method includes the step of actuating the part of the visual indicator both to enable use of the device and to initiate a gradual change in appearance of the visual indicator over time so as thereby to provide an indication to the user of the time from first use of the device.
19 . A method according to claim 18 , characterised in that the actuable part restricts flow through the opening to atmosphere before preparation for use, and that the step of actuating the part enables flow through the opening to atmosphere.
20 . A method according to claim 18 , characterised in that the step of actuating the part includes pulling away a removable cover strip.