Abstract | BACKGROUND AND OBJECTIVE: METHODS: A double-blind, placebo-controlled, randomized cross-over study was conducted. Lung function and airway response to mannitol was assessed on a control day and then re-assessed after pre-medication with placebo, SCG and eformoterol in nine subjects. Sensitivity to mannitol, expressed as the dose required to induce a 15% fall in FEV1 (PD15), and reactivity to mannitol, expressed as the % fall in FEV1 per mg of mannitol (response-dose ratio, RDR), are reported. RESULTS: Subjects had an FEV1 of 68 ± 14% predicted, FVC of 97 ± 15% predicted and FEV1 /FVC of 71 ± 8%. They were mildly hypoxemic and the SpO2 was 95 ± 2%.They had a PD15 to mannitol of 235 mg (95% CI: 150-368 mg) and a RDR of 0.057% fall in FEV1 per mg (95% CI: 0.038-0.085). After pre-medication with SCG, PD15 increased (773 mg, P < 0.05) and RDR was reduced (0.013, P < 0.05). Pre-medication with eformoterol also resulted in an increased PD15 (1141 mg, P < 0.01) and a reduced RDR (0.009, P < 0.01). A small but significant decrease in SpO2 from baseline was noted after mannitol in the presence of SCG (P < 0.05). CONCLUSIONS:
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Authors | Peter J Briffa, Sandra D Anderson, Deborah L Burton, Iven H Young |
Journal | Respirology (Carlton, Vic.)
(Respirology)
Vol. 16
Issue 1
Pg. 161-6
(Jan 2011)
ISSN: 1440-1843 [Electronic] Australia |
PMID | 21054671
(Publication Type: Journal Article, Randomized Controlled Trial)
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Copyright | © 2010 The Authors. Respirology © 2010 Asian Pacific Society of Respirology. |
Chemical References |
- Anti-Asthmatic Agents
- Ethanolamines
- Mannitol
- Cromolyn Sodium
- Oxygen
- Formoterol Fumarate
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Topics |
- Administration, Inhalation
- Adult
- Aged
- Anti-Asthmatic Agents
(therapeutic use)
- Bronchial Provocation Tests
- Bronchiectasis
(drug therapy)
- Cromolyn Sodium
(therapeutic use)
- Cross-Over Studies
- Ethanolamines
(therapeutic use)
- Female
- Forced Expiratory Volume
(drug effects)
- Formoterol Fumarate
- Humans
- Male
- Mannitol
(adverse effects, therapeutic use)
- Middle Aged
- Oxygen
(blood)
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