Difficulty with spacer devices

Spacer devices in asthma.

Metered dose inhalers and spacer devices.

Easy to carry, highly effective and extremely safe, allowing accurate, consistent dose delivery, metered dose inhalers are the inhalation devices doctors and patients choose most readily the world over. Clinical response, however, may be affected by the inhalation technique used and the precise formulation in the canisters. The purpose of this review is to consider metered dose inhalers, add on...

Bacterial contamination of spacer devices used by asthmatic children.

OBJECTIVES To investigate bacterial contamination in spacer devices used by asthmatic children and the device maintenance procedures practiced by parents. METHODS Spacer devices used by 62 asthmatic children were examined. Swabs taken from the inner surface of the reservoirs and face masks were cultured. Parents were interviewed regarding their spacer cleaning and disinfection routines. RES...

Inhalational drug delivery from seven different spacer devices.

BACKGROUND A study was performed to determine in vitro the difference in drug output of seven currently available spacer devices when used with different inhaled medications. METHODS A glass multistage liquid impinger (MSLI) was used to determine the amount of disodium cromoglycate (DSCG, 5 mg), salbutamol (100 micrograms), or budesonide (200 micrograms) obtained in various particle size rang...

Pressure flow characteristics of the valve in spacer devices.

The valve system in the mouth piece of two spacer devices was analysed. Pressures required to open and close the non-rebreathing valve were very low (less than 0.1 kPa). Inspiratory flow requirements were within physiological limits for infants' normal tidal breathing. Expiratory flow requirements varied significantly, and the flow required to prevent rebreathing from the chamber may exceed the...