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Titolo:
Comparative effects of hydrofluoroalkane and chlorofluorocarbon beclomethasone dipropionate inhalation on small airways: Assessment with functional helical thin-section computed tomography
Autore:
Goldin, JG; Tashkin, DP; Kleerup, EC; Greaser, LE; Haywood, UM; Sayre, JW; Simmons, MD; Suttorp, M; Colice, GL; Burgt, JAV; Aberle, DR;
Indirizzi:
Univ Calif Los Angeles, Sch Med, Dept Radiol Sci, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA Univ Calif Los Angeles, Sch Med, Div Pulm & Crit Care Med, Dept Med, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA 3M Pharmaceut, St Paul, MN USA 3M Pharmaceut St Paul MN USA3M Pharmaceut, St Paul, MN USA
Titolo Testata:
JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY
fascicolo: 6, volume: 104, anno: 1999,
pagine: S258 - S267
SICI:
0091-6749(199912)104:6<S258:CEOHAC>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-RESOLUTION CT; OBSTRUCTIVE PULMONARY-DISEASE; ASTHMA; LUNG; HYPERREACTIVITY;
Keywords:
hydrofluoroalkane; chlorofluorocarbon; beclomethasone diproprionate; asthma; small airways; thin-section computed tomography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Goldin, JG Univ Calif Los Angeles, Sch Med, Dept Radiol Sci, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 , CA 90095 USA
Citazione:
J.G. Goldin et al., "Comparative effects of hydrofluoroalkane and chlorofluorocarbon beclomethasone dipropionate inhalation on small airways: Assessment with functional helical thin-section computed tomography", J ALLERG CL, 104(6), 1999, pp. S258-S267

Abstract

A double-blind, randomized, parallel-group pilot study compared the relative efficacy of hydrofluoroalkane-134a beclomethasone dipropionate (HFA-BDP [QVAR]; mass median aerodynamic diameter, 0.8-1.2 m) versus cholorofluorocarbon-11/12 BDP (CFC-BDP [Beclovent]; mass median aerodynamic diameter, 3.5-4.0 m) in 31 steroid naive patients with mild to moderate asthma (PC20. 4 mg/mL). Functional high-resolution computed tomography was used to assess the relative efficacy of HFA-BDP and CFC-BDP on regional air trapping, as an indirect measure of small airways function and on regional hyperreactivity Pretreatment functional computed tomography was performed at residual volume before and after methacholine challenge. After 4 weeks of treatment, functional imaging was repeated before and after the same concentration of methacholine that was administered before the treatment (n = 19 patients). Quantitative assessment of changes in distribution of lung attenuation was performed. After 4 weeks of treatment, the HFA-BDP group showed significantly more improvement in air trapping overall (a shift in the lung attenuation curve at residual volume toward more attenuation) on the posttreatment computed tomography scan (P < .05; Fisher's Exact Test). After an equal constrictor stimulus (methacholine concentration), subjects treated with HFA-BDP (n = 10 patients) showed less increase in air trapping overall than subjects treated with CFC-BDP (n = 9 patients) on the posttreatment scans compared with the pretreatment scans (P < .001; Fisher's Exact Test). No significant difference was demonstrated between the 2 treatment groups with respect to improvement in symptoms, spirometry, or methacholine responsiveness assessedby FEV1, except for a greater reduction in breathlessness in the HFA-BDP group (P < .05). We conclude that HFA-BDP may have greater efficacy in the peripheral airways and that this effect is better assessed with functional imaging computed tomography techniques than with conventional physiologic tests.

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Documento generato il 03/12/20 alle ore 14:08:26