Using Inhalers and Other Devices
Inhalers dispense either a fluid or a powdered mist. Each inhaler or device can be a
little different, so it is important to learn how to use them properly. If not used correctly,
most of the medicine may never reach your lungs.
Metered-Dose Inhaler and Spacer
The metered-dose inhaler (MDI) is an aerosol and a very common type of device. The
medicine comes out of the inhaler in a spray, which may make it difficult to use the
device properly. For this reason, you should also use a holding chamber called a spacer
whenever you use an MDI.
Using a spacer:
• decreases the side effects of the medicine
• allows more of the medicine to reach the lungs
• requires less coordination when you are puffing the inhaler and breathing
When you use a spacer, the medicine is puffed into the chamber instead of directly
into the mouth. One puff of medicine is sprayed into the chamber, where the particles
separate. The large particles, which are too big to enter the lungs, stick to the sides of
the chamber. The small particles stay suspended for a few seconds. You can take your
time inhaling them, allowing more of the particles to settle in your lungs, where they do
the most good. If you do not use a spacer, the large particles settle in your mouth and
may cause soreness, a hoarse voice, or a fungal infection in the throat and mouth.
Using a spacer is quite easy, but because each spacer is different, you must follow the
instructions.
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