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- W2052209014 abstract "Nebulized pentamidine has been used as therapy for Pneumocystis carinii pneumonia. The lung dose delivered using different nebulizer systems and doses of pentamidine from 50-600 mg is unknown. To measure this a marker which does not alter the characteristics of the nebulized pentamidine solution must be found. We have assessed the aerosol characteristics of four jet nebulizers (System 22, System 22 Mizer, Optimist, Respigard II) and one ultrasonic device (Pulmosonic) using two concentrations of pentamidine isethionate (50 mg and 300 mg) in 3 ml of solution. The jet nebulizers were operated at a flow rate of 6 l min-1, a rate suitable for home use. These measurements were repeated with 99Tcm labelled human serum albumin (HSA) added to the solutions. A linear relationship between 99Tcm-HSA activity and pentamidine concentration was demonstrated by using a nine stage cascade impactor. The Respigard II and Optimist produced the best results in terms of particle size (96% less than 5 microns), but the addition of the tracer to the latter led to a smaller particle size range and a reduction in the amount of aerosol present at the mouthpiece. The Mizer system had 52% of particles less than 5 microns, the Pulmosonic 46%. The Respigard II had a total output of 8.7 mg for the 50 mg concentration and 30.9 mg for the 300 mg concentration. The System 22 produced corresponding outputs of 18.0 mg and 67.1 mg with 54% of the aerosol particles less than 5 microns.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2052209014 date "1989-07-01" @default.
- W2052209014 modified "2023-09-27" @default.
- W2052209014 title "Does 99Tcmhuman serum albumin alter the characteristics of nebulized pentamidine isethionate?" @default.
- W2052209014 doi "https://doi.org/10.1097/00006231-198907000-00013" @default.
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