Dosage Unit Sampling Apparatus (DUSA) for MDIs
The Dosage Unit Sampling Apparatus (DUSA) for MDIs consists of one collection tube, two rinsing caps, one filter support cap and one flow meter adapter supplied in a handy carrying case.
The standard collection tube itself and associated caps are manufactured from a high-quality inert polypropylene specifically formulated for medical and pharmaceutical applications.
Alternative materials are available on request e.g. aluminium or 316 stainless steel. All tubes and caps are laser numbered to assist in traceability.
In addition to the specifications laid down in Ph.Eur., the FDA recommends and USP specifies that the volume of air sampled during the test should not exceed 2 litres, this being the volume of air adjudged to be typical of the average patient.
This additional criterion can be met by positioning an electrically operated, timer controlled, two-way solenoid valve in the line between the collection tube and the vacuum pump to control the air flow supply to the inhaler (see Breath Actuation Controller for further information).
For further product information, please Contact Us.