A Pilot Study of the Physiologic Effects of Using the Breathe Technologies Noninvasive Open Ventilation System During Constant Work Rate Exercise in Subjects With Chronic Obstructive Pulmonary Disease
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 15
- 试验地点
- 2
- 主要终点
- Exercise Duration for Constant Work Rate Exercise Tests Under 4 Test Conditions
研究概览
简要总结
Pilot study in 15 stable male subjects with severe-to-very severe Chronic Obstructive Pulmonary Disease (COPD) to evaluate the effects of short term use of the Breathe Technologies noninvasive open ventilation (NIOV) system on respiratory mechanics during constant work rate exercise in subjects with severe COPD.
详细描述
Study was a randomized double-blinded crossover design in which subjects completed a series of exercises at a constant work rate while using 1) Test noninvasive ventilation (NIOV) system powered by compressed air, 2) Test NIOV system powered by 100% oxygen, 3) nasal cannula oxygen, 4) nothing (Control). Subjects were assessed during constant work rate exercise as reflected by exercise duration, isotime oxygenation (SpO2), and isotime dyspnea score (Borg). Exercise sessions took place over 4 visits with each visit lasting approximately 5 hours.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Treatment
- 盲法
- Double (Participant, Investigator)
入排标准
- 年龄范围
- 40 Years 至 —（Adult, Older Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Adult males, ≥ 40 years of age
- •Diagnosis of severe COPD (GOLD stage III or IV) defined as having a FEV1 < 50% of predicted and an FEV1/FVC ratio < 70% of predicted
- •Ventilatory limitation to exercise, documented by a VE/MVV > 0.85
- •SpO2 between 80% and 88% during incremental exercise testing on room air
- •Willingness and ability (after training) to exercise on a cycle ergometer
- •Willingness and ability to perform all other study related procedures and tasks
- •Ability to be properly fitted with the Breathe nasal mask
- •Ability to tolerate and be appropriately titrated on the Breathe ventilator (See Appendix E)
- •Ability to be properly fitted with an exercise mask
- •Fluency in written and spoken English
- •Provision of written informed consent
排除标准
- •History of acute exacerbation of COPD within 30 days of screening
- •History of serious epistaxis within 14 days of screening
- •Requirement of > 5 LPM nasal O2 to maintain an SpO2 > 90% while at rest
- •History of pneumothorax secondary to lung bullae
- •History of intolerance to supplemental oxygen
- •Musculoskeletal or other non-pulmonary impairment that limits exercise tolerance
- •Inability to achieve an optimal CWR level (4-7 minutes) during Study Visit 1R
- •Current participation in another interventional study or participation within 14 days of screening
- •Presence of any condition or abnormality that in the opinion of the Principal Investigator may compromise the subject's safety or the quality of the study data
结局指标
主要结局
Exercise Duration for Constant Work Rate Exercise Tests Under 4 Test Conditions
时间窗: Study days 1,2,3, and 4; Day 1 for no treatment; day 2 for no treatment and NIOV - Room Air and NIOV - oxygen; Day 3 for no treatment and NIOV - Room Air and NIOV - oxygen; Day 4 for NIOV - oxygen and Nasal Cannula Oxygen.
Mean differences between NIOV - oxygen, NIOV - Room Air, Nasal Cannula Oxygen, and no treatment (control).
次要结局
- Borg Dyspnea Score During Constant Workrate Exercise at Isotime(Outcome was measured in each Study day 1,2,3 and 4. Study days 1,2,3, and 4; Day 1 for no treatment; day 2 for no treatment and NIOV - Room Air and NIOV - oxygen; Day 3 for no treatment and NIOV - Room Air and NIOV - oxygen; Day 4 for NIOV - oxygen and N)
- SpO2 During Constant Workrate Exercise at Isotime(Outcome was measured in each of the Study day 1,2, 3 and 4. Study days 1,2,3, and 4; Day 1 for no treatment; day 2 for no treatment and NIOV - Room Air and NIOV - oxygen; Day 3 for no treatment and NIOV - Room Air and NIOV - oxygen; Day 4 for NIOV - oxyg)