Document Detail


Measurement Techniques for Respiratory Tract Deposition of Airborne Nanoparticles: A Critical Review.
MedLine Citation:
PMID:  24151837     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Abstract Determination of the respiratory tract deposition of airborne particles is critical for risk assessment of air pollution, inhaled drug delivery, and understanding of respiratory disease. With the advent of nanotechnology, there has been an increasing interest in the measurement of pulmonary deposition of nanoparticles because of their unique properties in inhalation toxicology and medicine. Over the last century, around 50 studies have presented experimental data on lung deposition of nanoparticles (typical diameter≤100 nm, but here≤300 nm). These data show a considerable variability, partly due to differences in the applied methodologies. In this study, we review the experimental techniques for measuring respiratory tract deposition of nano-sized particles, analyze critical experimental design aspects causing measurement uncertainties, and suggest methodologies for future studies. It is shown that, although particle detection techniques have developed with time, the overall methodology in respiratory tract deposition experiments has not seen similar progress. Available experience from previous research has often not been incorporated, and some methodological design aspects that were overlooked in 30-70% of all studies may have biased the experimental data. This has contributed to a significant uncertainty on the absolute value of the lung deposition fraction of nanoparticles. We estimate the impact of the design aspects on obtained data, discuss solutions to minimize errors, and highlight gaps in the available experimental set of data.
Authors:
Jakob Löndahl; Winfried Möller; Joakim H Pagels; Wolfgang G Kreyling; Erik Swietlicki; Otmar Schmid
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-10-23
Journal Detail:
Title:  Journal of aerosol medicine and pulmonary drug delivery     Volume:  -     ISSN:  1941-2703     ISO Abbreviation:  J Aerosol Med Pulm Drug Deliv     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-10-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101475057     Medline TA:  J Aerosol Med Pulm Drug Deliv     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1 Ergonomics and Aerosol Technology (EAT), Lund University , SE-221 00 Lund, Sweden .
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