Spacer devices Flashcards
1
Q
Describe the purpose of a spacer
A
Remove the need for coordination between actuation of the pMDI and inhalation
2
Q
Who are spacers suitable for?
A
children
elderly
nocturnal asthma
pt with poor inhaler technique
pt requiring high dose CS
pt prone to candidiasis with ICS
3
Q
Describe the use and care of spacers
A
- Replace every 6-12 months
- Clean monthly with mild detergent and allow it to air dry
4
Q
List the 3 types of spacers
A
- Large volume - volumatic 700mL
- Small volume - aerochamber 145mL
- Tube
5
Q
Describe how spacers work
A
- Increase distance between inhaler mouthpiece and pt
- Decreases particle velocity allowing time for propellant to be driven off
- Filters larger particles
- Improves coordination
6
Q
Give 3 possible reasons for variation in amount of drug delivered using a spacer.
A
- From pt-pt with same device
- With different devices
- With different drug formulation
7
Q
List 3 reasons of how patient can affect drug delivery with a spacer
A
- Breathing pattern
- Handling
- Lapse time between actuation and inhalation
8
Q
List 3 reasons of how the device can affect drug delivery with a spacer
A
- Material
- Valve design and facemask
- Size, shape, surface texture
9
Q
List 3 reasons of how the formulation can affect drug delivery with a spacer
A
- Particle velocity
- Particle size and shape
- Electrostatic charge
