Profylactisch 200ugr salbutamol kan tot 50% beschermen tegen de inspiratoire luchtwegobstructie gemeten in MIF50 die bij de meerderheid van de astmatische kinderen met FEV1 daling tijdens/na inspanning optreedt.
ID
Bron
Verkorte titel
Aandoening
Exercise induced asthma/ inspanningsastma.
Inspiratory airflow obstruction/ inspiratoire luchtwegobstructie.
Ondersteuning
Onderzoeksproduct en/of interventie
Uitkomstmaten
Primaire uitkomstmaten
The protective effect of a single regular dose of salbutamol compared with a placebo against inspiratory airflow obstruction in asthmatic children aged 8 till 16 years old.
Achtergrond van het onderzoek
Exercise induced bronchoconstriction (EIB) is a highly frequent and specific symptom of asthma and also the most bothersome as reported by asthmatic children. Exercise challenge tests (ECT) can identify EIB and are therefore frequently used to diagnose and evaluate asthma. Salbutamol provides excellent protection against EIB, however in daily life prophylactic salbutamol does not always prevent exercise induced symptoms in asthmatic children. A recent study demonstrated that the majority of children with EIB have besides expiratory also inspiratory airflow obstruction. This means that exercise can induce narrowing of the larger airways, possibly as a response to EIB. It is not known to what extent salbutamol can reduce this inspiratory airflow obstruction. Main objective of this study is to investigate if salbutamol protects against inspiratory airflow obstruction.
Doel van het onderzoek
Profylactisch 200ugr salbutamol kan tot 50% beschermen tegen de inspiratoire luchtwegobstructie gemeten in MIF50 die bij de meerderheid van de astmatische kinderen met FEV1 daling tijdens/na inspanning optreedt.
Onderzoeksopzet
t= 0: exercise challenge test 1.
t= 1week later: exercise challenge test 2.
Placebo or salbutamol in randomized order.
Onderzoeksproduct en/of interventie
Two exercise challenge test (older children perform this test on a treadmill, younger children on a jumping castle). 15 minutes prior to the test children inhale either 200ugr salbutamol or a placebo.
Publiek
Departement of pediatrics<br>
Haaksbergerstraat 55
R. Visser
Enschede 7513 ER
The Netherlands
+31 (0)53 4872310
R.Visser@mst.nl
Wetenschappelijk
Departement of pediatrics<br>
Haaksbergerstraat 55
R. Visser
Enschede 7513 ER
The Netherlands
+31 (0)53 4872310
R.Visser@mst.nl
Belangrijkste voorwaarden om deel te mogen nemen (Inclusiecriteria)
- Clinical history of EIB.
- Age 8 till 16 years old.
- Ability to jump or run and perform reproducible lung function tests, i.e. coefficient of the predicted value variation in 3 of 5 consecutive measurements < 5%.
Belangrijkste redenen om niet deel te kunnen nemen (Exclusiecriteria)
- Exacerbation in the last 4 weeks prior to the ECT (hospital admission or use of systemic corticosteroids).
- Use of long acting bronchodilators 24 hours before testing.
- Use of short acting bronchodilators 8 hours before testing.
- Use of leukotriene antagonists 24 hours before testing.
- Other pulmonary or cardiac disorder.
Opzet
Deelname
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