Metered-Dose Inhaler Used with a Valved Holding Chamber
A metered-dose inhaler (MDI) is a pressurized canister of
medicine that releases a medicated mist. The valved holding
chamber is a spacer device that can be used with the MDI.
Examples of valved holding chambers are the Aerochamber or
the OptiChamber. The chamber helps make sure the MDI is at
the correct distance from your child's mouth and at the best
angle. It helps your child inhale more medicine into the
lungs. The chamber can come with or without a mask.
Prior to first use, wash the valved holding chamber with
warm soapy water. Do not rinse. Allow to air dry.
Attach the MDI to the valved holding chamber as follows:
- Remove the caps from the chamber and MDI.
- Shake the metered-dose inhaler vigorously.
- Insert the mouthpiece of the inhaler into the
rubber-sealed end of the chamber.
- If the MDI has not been used before, or if it has not
been used for 1 week or more, waste 2 puffs into the
chamber. NOTE: This does not count as a dose of medicine.
To use the MDI with the valved holding chamber and mask:
- Select the appropriate size mask for the patient
(small, medium or large) and attach to the mouthpiece
end.
- Have your child stand or sit up straight.
- Put the mask to your child's face, covering both the
nose and mouth. The mask must be pressed to your
child's face to assure that the medicine can get to
the child's lungs.
- Depress the MDI once.
- Have your child breathe in and out slowly through the
valved holding chamber for at least 5 breaths.
- When additional puffs are prescribed by your doctor,
wait 1 minute and repeat.
To use the MDI with the valved holding chamber and
mouthpiece:
- Have your child stand or sit up straight.
- Place the chamber into your child's mouth. Ask your
child to breathe slowly in and out of the valved holding
chamber several times.
- Depress the MDI once.
- Have your child breathe in as deeply as possible and
then hold their breath for 10 seconds. For children
unable to do a breathe hold, another method is to breathe
in and out slowly for 3 to 5 breaths without the breath
hold.
- When your provider prescribes additional puffs, wait 1
minute and repeat.
Tracking Doses
How to track doses for scheduled medicine used every day:
- Place a blank label around the boot of the MDI.
- Identify the number of puffs (actuations) available by
reading the label on the MDI canister.
- Divide the number of available puffs by the prescribed
number of puffs per day. (For example, 120 doses
available divided by 4 puffs per day would equal a 30
day supply of doses.)
- Write the date on the label that you will need to refill the
prescription. Give yourself a 5 day grace period. (For
example if you started on 7/1 then you need to write down
7/25 on the label).
How track doses for medicine used as needed:
- Place a blank label around the boot of the MDI.
- Identify the number of puffs (actuations) available by
reading the label on the MDI canister.
- Write down the start date and number of puffs available
on the label.
- Make a hash mark for each puff used (include wasted
puffs).
- Get a refill when 10 puffs are left.
Cleaning Instructions
- Remove mouthpiece cap and end cap from valved holding
chamber by pulling them off.
- Separate the mouthpiece from the clear chamber by rotating
the mouthpiece counter clockwise until it unlocks and
pulls off.
- Remove the valve from the small clear posts on the end of
the chamber.
- Wash all parts in warm water with a mild liquid soap.
Rinse all parts (except chamber) with water. Shake out
excess water an allow all parts to air dry.
- Reassemble all parts, making sure that the one-way valve
is seated correctly on the small clear posts on the end
of the chamber. Place mouthpiece over valve assembly
then turn clockwise until it snaps in place.
- When replacing the end cap, line up the edges of the
warning signal with the raised lines on the side of the
end cap so the warning signal will fit into the proper
space. Place on a hard surface and push down firmly to
ensure end cap is firmly sealed.
- Replace the one-way valve when it becomes dried out and
starts to curl. A new valve can be ordered by calling
800-962-1266.
Written by the Asthma Task Force at The Children's Hospital, Denver.
This content is reviewed periodically and is subject to
change as new health information becomes available. The
information is intended to inform and educate and is not a
replacement for medical evaluation, advice, diagnosis or
treatment by a healthcare professional.
Copyright © 2006 McKesson Corporation and/or one of its subsidiaries. All Rights Reserved.