Record Display for the EPA National Library Catalog

RECORD NUMBER: 3 OF 9

OLS Field Name OLS Field Data
Main Title Deposition Patterns of Polydisperse Aerosols within Human Lungs.
Author Martonen, T. B. ; Katz, I. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. ;North Carolina Univ. at Chapel Hill. Div. of Pulmonary Diseases. ;Trinity Univ., San Antonio, TX. Dept. of Engineering Science.
Publisher cOct 93
Year Published 1993
Report Number EPA/600/J-94/332;
Stock Number PB94-202116
Additional Subjects Inhalation administration ; Pharmacokinetics ; Aerosols ; Lung diseases ; Respiration ; Mathematical models ; Diffusion ; Sedimentation ; Dispersing ; Particle size distribution ; Drug administration routes ; Nebulizers and vaporizers ; Graphs(Charts) ; Reprints ; Inertial impaction ; PBPK models
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB94-202116 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/11/1994
Collation 26p
Abstract
The efficacy of airborne pharmaceuticals in the treatment of lung diseases may be improved with the selective deposition of inhaled drugs. Herein, a validated mathematical model is used to examine the effects of aerosol polydispersity upon deposition in the human lung. Localized deposition patterns are calculated on an airway-by-airway basis. For log-normal particle size distributions, as produced by metered-dose inhalers (MDIs) and nebulizers, deposition efficiencies are shown to be sensitive functions of the mass median aerodynamic diameter (MMAD) and geometric standard deviation (GSD). The relevance of the count median diameter (CMD) of a log-normal distribution is also examined. The model provides a heretofore unavailable basis for interpreting and information obtained from gamma camera lung scans. The agreement between theory and experiment indicates that the behavior of inhaled particles is accurately modeled.