Exercise in Air Pollution and Lung Health in Asthmatics
The Effects of Inhaled Beta-2-Agonists and Air Pollution on Lung Function and Athletic Capacity
Přehled studie
Postavení
Postavení
Podmínky
Podmínky
Intervence / Léčba
Intervence / Léčba
Typ studie
Typ studie
Zápis (Očekávaný)
Zápis
Fáze
Fáze
- Nelze použít
Kontakty a umístění
Studijní místa
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British Columbia
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Vancouver, British Columbia, Kanada, V6T 1Z1
- University of British Columbia, Environmental Physiology Laboratory
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Kritéria účasti
Kritéria způsobilosti
Kritéria způsobilosti
Věk způsobilý ke studiu
Přijímá zdravé dobrovolníky
Pohlaví způsobilá ke studiu
Popis
Inclusion Criteria:
- mild-moderate asthmatics with controlled treatment (definition of "mild": percent fall index at eucapnic voluntary hyperpnea (EVH) test on screening day between 10-15%; "moderate": percent fall index at EVH test on screening day between 15 - 20%).
- men and non-pregnant women
Exclusion Criteria:
- any history of uncontrolled respiratory or cardiac disease
- pregnancy
- allergic reactions to lidocaine and salbutamol
- any recent infections or orthopaedic nasal issues/injuries that may interfere with the insertion of the catheter needed to assess expiratory flow limitation or work of breathing
- claustrophobia in small rooms, comparable to the air pollution chamber used for this study.
- English as a second language (ESL) - participants who are not able to understand the risk that may be associated with the participation in this study due to language difficulties after following the University of British Clinical Research Ethics Board Guidance Notes 13.2.1. (ESL participants will be given a consent form in the most appropriate language or an appropriate translator will be present during the initial consent process).
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Základní věda
- Přidělení: Randomizované
- Intervenční model: Crossover Assignment
- Maskování: Trojnásobný
Počet zbraní
Zbraně a zásahy
Skupina účastníků / ArmSkupina účastníků / Arm |
Intervence / LéčbaIntervence / Léčba |
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Aktivní komparátor: Resting in diesel exhaust following salbutamol inhalation
Participants will be sitting in an air pollution chamber while being exposed to diesel exhaust (PM2.5 of 300 μg/m3) for a total of 1hour following the inhalation of 400ug of salbutamol.
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Study participants will sit on a chair for 60min.
This is to simulate physical resting condition.
Study participants will be exposed to 400ug of salbutamol prior to entering the air pollution chamber.
Participants will be exposed to PM2.5 of 300 μg/m3
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Komparátor placeba: Resting in diesel exhaust following placebo inhalation
Participants will be sitting in an air pollution chamber while being exposed to diesel exhaust (PM2.5 of 300 μg/m3) for a total of 1hour following the inhalation of a placebo.
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Study participants will sit on a chair for 60min.
This is to simulate physical resting condition.
Participants will be exposed to PM2.5 of 300 μg/m3
Study participants will inhale a placebo (placebo for salbutamol) prior to entering the air pollution chamber
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Aktivní komparátor: Cycling in diesel exhaust following salbutamol inhalation
Participants will be cycling while being exposed to diesel exhaust (PM2.5 of 300 μg/m3) for a total of 1 hr following the inhalation of 400ug of salbutamol.
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Study participants will be exposed to 400ug of salbutamol prior to entering the air pollution chamber.
Participants will be exposed to PM2.5 of 300 μg/m3
Study participants will exercise on a cycle ergometer for 45min.
Participants will start their 30-min long constant workload exercise test test 60-min after the drug intervention.
The exercise test will be set to a resistance of 50% of the maximal wattage that was reached on the graded exercise test on the screening day.
The cycling exercise intervention will follow the rest-intervention.
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Komparátor placeba: Cycling in diesel exhaust following placebo inhalation
Participants will be cycling while being exposed to diesel exhaust (PM2.5 of 300 μg/m3) for a total of 1 hr following the inhalation of a placebo
|
Participants will be exposed to PM2.5 of 300 μg/m3
Study participants will inhale a placebo (placebo for salbutamol) prior to entering the air pollution chamber
Study participants will exercise on a cycle ergometer for 45min.
Participants will start their 30-min long constant workload exercise test test 60-min after the drug intervention.
The exercise test will be set to a resistance of 50% of the maximal wattage that was reached on the graded exercise test on the screening day.
The cycling exercise intervention will follow the rest-intervention.
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Falešný srovnávač: Resting in filtered air following salbutamol inhalation
Participants will be sitting while being exposed to filtered air for a total of 1hour following the inhalation of 400ug of salbutamol.
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Study participants will sit on a chair for 60min.
This is to simulate physical resting condition.
Participants will be breathing filtered air
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Komparátor placeba: Resting in filtered air following placebo inhalation
Participants will be sitting while being exposed to filtered air for a total of 1hour following the inhalation of a placebo.
|
Study participants will sit on a chair for 60min.
This is to simulate physical resting condition.
Participants will be breathing filtered air
|
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Falešný srovnávač: Cycling in filtered air following salbutamol inhalation
Participants will be cycling while being exposed to filtered air for a total of 1 hr following the inhalation of 400ug of salbutamol.
|
Study participants will be exposed to 400ug of salbutamol prior to entering the air pollution chamber.
Study participants will exercise on a cycle ergometer for 45min.
Participants will start their 30-min long constant workload exercise test test 60-min after the drug intervention.
The exercise test will be set to a resistance of 50% of the maximal wattage that was reached on the graded exercise test on the screening day.
The cycling exercise intervention will follow the rest-intervention.
Participants will be breathing filtered air
|
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Komparátor placeba: Cycling in filtered air following placebo inhalation
Participants will be cycling while being exposed to filtered air for a total of 1 hr following the inhalation of a placebo
|
Study participants will inhale a placebo (placebo for salbutamol) prior to entering the air pollution chamber
Study participants will exercise on a cycle ergometer for 45min.
Participants will start their 30-min long constant workload exercise test test 60-min after the drug intervention.
The exercise test will be set to a resistance of 50% of the maximal wattage that was reached on the graded exercise test on the screening day.
The cycling exercise intervention will follow the rest-intervention.
Participants will be breathing filtered air
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Co je měření studie?
Primární výstupní opatření
Primární výstupní opatření
Měření výsledku |
Časové okno |
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Change in rating of perceived exertion for breathing, dyspnea
Časové okno: Difference in perceived dyspnea between salbutamol and placebo exposure as well as polluted air and filtered air. Dyspnea ratings will be collected every 2.5min for a duration of 45min during the exercise test.
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Difference in perceived dyspnea between salbutamol and placebo exposure as well as polluted air and filtered air. Dyspnea ratings will be collected every 2.5min for a duration of 45min during the exercise test.
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Sekundární výstupní opatření
Sekundární výstupní opatření
Měření výsledku |
Časové okno |
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Change in work of breathing (WOB) between filtered air and polluted air
Časové okno: work of breathing will be assessed every 2.5min for a time period of 45min during the exercise bout
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work of breathing will be assessed every 2.5min for a time period of 45min during the exercise bout
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Další výstupní opatření
Další výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
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Change in spirometry (FEV1 and FVC) between filtered air and polluted air
Časové okno: Spirometry will be assessed at baseline and 45min after the start of the exercise bout.
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Spirometry will be assessed at baseline and 45min after the start of the exercise bout.
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Change in cognitive function
Časové okno: Cognitive function will be assessed at baseline (prior to entering the air pollution chamber) and 45 min after the start of the exercise intervention.
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cognitive function will be assessed using the NIH toolbox tests and the brain derived neurotrophic factor (BDNF) blood serum measurements
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Cognitive function will be assessed at baseline (prior to entering the air pollution chamber) and 45 min after the start of the exercise intervention.
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Retinal Imaging
Časové okno: The retina will be imaged at baseline (prior to entering the air pollution chamber) and 20 min after the completion of the exercise intervention.
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The blood vessels in the eye will be imaged using a camera.
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The retina will be imaged at baseline (prior to entering the air pollution chamber) and 20 min after the completion of the exercise intervention.
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Spolupracovníci a vyšetřovatelé
Sponzor
Sponzor
Spolupracovníci
Spolupracovníci
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia
Začátek studia
Primární dokončení (Aktuální)
Primární dokončení
Dokončení studie (Aktuální)
Dokončení studie
Termíny zápisu do studia
První předloženo
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Odhad)
První zveřejněno
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Poslední zveřejněná aktualizace
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Naposledy ověřeno
Více informací
Termíny související s touto studií
Klíčová slova
Další relevantní podmínky MeSH
- Fyziologické účinky léků
- Adrenergní látky
- Neurotransmiterové látky
- Molekulární mechanismy farmakologického působení
- Autonomní agenti
- Agenti periferního nervového systému
- Adrenergní agonisté
- Bronchodilatační činidla
- Antiastmatická činidla
- Agenti dýchacího systému
- Činidla pro kontrolu reprodukce
- Agonisté adrenergních beta-2 receptorů
- Adrenergní beta-agonisté
- Tokolytická činidla
- Albuterol
Další identifikační čísla studie
Další identifikační čísla studie
- H13-01079
Tyto informace byly beze změn načteny přímo z webu clinicaltrials.gov. Máte-li jakékoli požadavky na změnu, odstranění nebo aktualizaci podrobností studie, kontaktujte prosím register@clinicaltrials.gov. Jakmile bude změna implementována na clinicaltrials.gov, bude automaticky aktualizována i na našem webu .