Abstract
We examined the effect of tetracaine aerosol inhalation, a local anesthetic, on lung volume decrements, rapid shallow breathing, and subjective symptoms of breathing discomfort induced by the acute inhalation of 0.30 ppm ozone for 65 min in 22 ozone-sensitive healthy human subjects. After 50 min of ozone inhalation FEV1 was reduced 24%, breathing frequency was increased 40%, tidal volume was decreased 31%, and total subjective symptom score was increased (71.2, compared with 3.8 for filtered air exposure). Inhalation of tetracaine aerosol resulted in marked reductions in ozone-induced subjective symptoms of throat tickle and/or irritation (92.1%), cough (78.5%), shortness of breath (72.5%), and pain on deep inspiration (69.4%). In contrast, inhalation of tetracaine aerosol (mass median aerodynamic diameter of 3.52 μm with a geometric standard deviation of 1.92) resulted in only minor and inconsistent rectification of FEV1 decrements (5.0%) and breathing frequency (-3.8%) that was not significantly different from that produced by saline aerosol alone (FEV1, 5.1% and breathing frequency, -2.7%). Our data are consistent with afferent endings located within the large conducting airways of the tracheobronchial tree being primarily responsible for ozone-induced subjective symptoms and provides strong evidence that ozone-induced inhibition of maximal inspiratory effort is not dependent on conscious sensations of inspiratory discomfort.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1121-1127 |
| Number of pages | 7 |
| Journal | American Journal of Respiratory and Critical Care Medicine |
| Volume | 163 |
| Issue number | 5 |
| State | Published - 2001 |
Fingerprint
ASJC Scopus subject areas
- Pulmonary and Respiratory Medicine
Cite this
Differential effects of airway anesthesia on ozone-induced pulmonary responses in human subjects. / Schelegle, Edward S; Eldridge, M. W.; Cross, Carroll E; Walby, W. F.; Adams, W. C.
In: American Journal of Respiratory and Critical Care Medicine, Vol. 163, No. 5, 2001, p. 1121-1127.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Differential effects of airway anesthesia on ozone-induced pulmonary responses in human subjects
AU - Schelegle, Edward S
AU - Eldridge, M. W.
AU - Cross, Carroll E
AU - Walby, W. F.
AU - Adams, W. C.
PY - 2001
Y1 - 2001
N2 - We examined the effect of tetracaine aerosol inhalation, a local anesthetic, on lung volume decrements, rapid shallow breathing, and subjective symptoms of breathing discomfort induced by the acute inhalation of 0.30 ppm ozone for 65 min in 22 ozone-sensitive healthy human subjects. After 50 min of ozone inhalation FEV1 was reduced 24%, breathing frequency was increased 40%, tidal volume was decreased 31%, and total subjective symptom score was increased (71.2, compared with 3.8 for filtered air exposure). Inhalation of tetracaine aerosol resulted in marked reductions in ozone-induced subjective symptoms of throat tickle and/or irritation (92.1%), cough (78.5%), shortness of breath (72.5%), and pain on deep inspiration (69.4%). In contrast, inhalation of tetracaine aerosol (mass median aerodynamic diameter of 3.52 μm with a geometric standard deviation of 1.92) resulted in only minor and inconsistent rectification of FEV1 decrements (5.0%) and breathing frequency (-3.8%) that was not significantly different from that produced by saline aerosol alone (FEV1, 5.1% and breathing frequency, -2.7%). Our data are consistent with afferent endings located within the large conducting airways of the tracheobronchial tree being primarily responsible for ozone-induced subjective symptoms and provides strong evidence that ozone-induced inhibition of maximal inspiratory effort is not dependent on conscious sensations of inspiratory discomfort.
AB - We examined the effect of tetracaine aerosol inhalation, a local anesthetic, on lung volume decrements, rapid shallow breathing, and subjective symptoms of breathing discomfort induced by the acute inhalation of 0.30 ppm ozone for 65 min in 22 ozone-sensitive healthy human subjects. After 50 min of ozone inhalation FEV1 was reduced 24%, breathing frequency was increased 40%, tidal volume was decreased 31%, and total subjective symptom score was increased (71.2, compared with 3.8 for filtered air exposure). Inhalation of tetracaine aerosol resulted in marked reductions in ozone-induced subjective symptoms of throat tickle and/or irritation (92.1%), cough (78.5%), shortness of breath (72.5%), and pain on deep inspiration (69.4%). In contrast, inhalation of tetracaine aerosol (mass median aerodynamic diameter of 3.52 μm with a geometric standard deviation of 1.92) resulted in only minor and inconsistent rectification of FEV1 decrements (5.0%) and breathing frequency (-3.8%) that was not significantly different from that produced by saline aerosol alone (FEV1, 5.1% and breathing frequency, -2.7%). Our data are consistent with afferent endings located within the large conducting airways of the tracheobronchial tree being primarily responsible for ozone-induced subjective symptoms and provides strong evidence that ozone-induced inhibition of maximal inspiratory effort is not dependent on conscious sensations of inspiratory discomfort.
UR - http://www.scopus.com/inward/record.url?scp=0035038980&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035038980&partnerID=8YFLogxK
M3 - Article
C2 - 11316647
AN - SCOPUS:0035038980
VL - 163
SP - 1121
EP - 1127
JO - American Journal of Respiratory and Critical Care Medicine
JF - American Journal of Respiratory and Critical Care Medicine
SN - 1073-449X
IS - 5
ER -