Effects of Tiotropium on Walking Capacity in Patients With COPD
This study was designed to test the following hypothesis:
A) The acute and long-term (3 weeks) bronchodilator-induced changes in exercise tolerance and in the physiological response during the endurance shuttle walk will be greater with tiotropium compared to placebo in COPD patients.
B) Three weeks of bronchodilation will be associated with increase activity of daily living as evaluated using the London Chest Activity Daily Living scale.
調査の概要
詳細な説明
Objectives:
The purpose of this study is to compare the acute bronchodilator-induced changes in exercise tolerance during the endurance shuttle walk between tiotropium and placebo in COPD patients. Also, it will evaluate the physiological response (VE, VO2, VCO2, and heart rate) during the endurance shuttle walk in patients with COPD patients. Finally, it will compare the long-term (3 weeks) bronchodilator-induced changes in exercise tolerance during the endurance shuttle walk between tiotropium and placebo in COPD patients and evaluate the impact of long-term (3 weeks) bronchodilation on activity of daily living evaluated using the London Chest Activity Daily Living scale.
Methods:
This will be a double-blind, randomized and parallel-group study. Due to the long action duration of tiotropium (up to 4 weeks), a cross-over design, as we used in our ipratropium versus placebo study, is not appropriate in the present study. The study will require five visits at the Centre de recherche de l'Hopital Laval. The first visit will include review of the consent form, pulmonary function testing, and a maximal incremental shuttle walk. The following two visits (Visit 2 and 3) will be used to familiarize the participants to the shuttle endurance walking test. Salbutamol and ipratropium bromide will be stopped 6 hours prior to these visits while the remaining medication allowed during the study period (see below) will be continued as prescribed. The goal of the familiarization will be to reduce the learning effect that typically occurs when an individual completes the same endurance test several times 3. On visit 4, patients will be randomized to receive one of the two treatments: placebo or tiotropium 18 ug (Spiriva) using the handihaler device. Pulmonary function testing will then be performed and the London Chest Activity Daily Living scale will be administered. Two hours following the inhalation of the first study dose, pulmonary function testing will be repeated and the patients will perform an endurance shuttle walk. They will be provided enough medication for the study duration and discharged. The same procedure as Visit 4 will be completed three weeks later, on visit 5.
Data analysis:
The main outcome will be endurance time at day 21. This variable will be compared between the two treatment arms using an unpaired t-test. The endurance time at day 0 will also be compared between the two treatment arms using the same procedure. The time course of the cardiorespiratory parameters and dyspnea over time will be compared between the two exercise modalities. Comparisons will be done using a repeated measure design (ANOVA). Significance level will be set at a p value of 0.05. The two familiarization endurance shuttle walk tests performed at day -10 and day -5 will be used to evaluate the test-retest variability of this procedure.
研究の種類
入学 (実際)
段階
- フェーズ 4
連絡先と場所
研究場所
-
-
-
Quebec、カナダ、G1V 4G5
- Centre de recherche de l'IUCPQ
-
-
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- age > 50 years, smoking history > 10 packs/year, FEV1 < 70% of predicted and FEV1/FVC < 70%.
Exclusion Criteria:
- respiratory exacerbation within the 2 months preceding the study, history of asthma, significant O2 desaturation (SaO2 < 85%) at rest or during exercise, presence of another pathology that could influence exercise tolerance.
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:処理
- 割り当て:ランダム化
- 介入モデル:クロスオーバー割り当て
- マスキング:トリプル
武器と介入
参加者グループ / アーム |
介入・治療 |
---|---|
プラセボコンパレーター:プラセボ
|
Placebo diskus inhalation powder, once daily
|
アクティブコンパレータ:チオトロピウム
|
Tiotropium diskus inhalation powder, 18ug, once daily
他の名前:
|
この研究は何を測定していますか?
主要な結果の測定
結果測定 |
時間枠 |
---|---|
Endurance time during an endurance shuttle walk
時間枠:acute response (2.5 hours) following the administration of the active and comparison drug
|
acute response (2.5 hours) following the administration of the active and comparison drug
|
二次結果の測定
結果測定 |
時間枠 |
---|---|
Compare the long-term bronchodilator-induced changes in exercise tolerance during the endurance shuttle walk
時間枠:three weeks
|
three weeks
|
Evaluate the impact of long-term bronchodilation on activity of daily living evaluated using the London Chest Activity Daily Living scale
時間枠:three weeks
|
three weeks
|
Cardio-respiratory responses during an endurance shutlle walk
時間枠:acute response following the administration of the study medication
|
acute response following the administration of the study medication
|
協力者と研究者
スポンサー
研究記録日
主要日程の研究
研究開始
研究の完了 (実際)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
追加の関連 MeSH 用語
その他の研究ID番号
- CER1199
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