Effect of race on fine particle deposition for oral and nasal breathing
Bennett, WD; Zeman, KL
HERO ID
155687
Reference Type
Journal Article
Year
2005
Language
English
PMID
| HERO ID | 155687 |
|---|---|
| In Press | No |
| Year | 2005 |
| Title | Effect of race on fine particle deposition for oral and nasal breathing |
| Authors | Bennett, WD; Zeman, KL |
| Journal | Inhalation Toxicology |
| Volume | 17 |
| Issue | 12 |
| Page Numbers | 641-648 |
| Abstract | Nasal efficiency for removing fine particles from inhaled air may be affected by variations in nasal structure associated with race. In 11 African American and 11 Caucasian adults (age 18-31 yr) we measured the fractionaldeposition (DF) of fine particles (1 and 2 μm mass median aerodynamic diameter) (MMAD) for oral and nasal breathing using individual breathing patterns previously measured by respiratory inductance plethysmography during a graded exercise protocol. DF for both nasal and mouth breathing was measured separately by laser photometry at the same tidal volume and breathing rate for resting and light exercise (20% of maximum work load) conditions. From these DF measures, nasal deposition efficiency (NDE) was calculated for each condition. For light exercise conditions, NDE for both 1- and 2-μm particles was less in African Americans versus Caucasians, 0.15 ′ 0.07 (SD) versus 0.24 ′ 0.11 for 1-μm particles (p =.03), and 0.29 ′ 0.13 versus 0.44 ′ 0.11 for 2-μm particles (p = .006). The racial differences in NDE were associated with racial differences in nasal resistance and nostril shape. These race-dependent nasal efficiencies are dosimetric factors that should be considered in modeling and assessing particulate dose from human exposure to air pollutants. |
| Doi | 10.1080/08958370500188984 |
| Pmid | 16087570 |
| Wosid | WOS:000231082600001 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Is Peer Review | Yes |