The Cardiovascular Effects of Nitrogen Dioxide Exposure
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 12
- 试验地点
- 1
- 主要终点
- Forearm blood flow measured by venous occlusion plethysmography in response to intraarterial vasodilators (acetylcholine, sodium nitroprusside, bradykinin and verapamil)
研究概览
简要总结
Exposure to air pollution has been linked to increased cardiorespiratory morbidity and mortality. The exact component of air pollution that mediates this effect is unknown, but the link is strongest for fine combustion derived particulate matter derived from traffic sources. It has been demonstrated that inhalation of diesel exhaust impairs vascular vasomotor tone and endogenous fibrinolysis. Recent studies using an inline retrofit particle trap to reduce the particulate component of exhaust have shown that filtering particles leads to a reversal of the endothelial dysfunction seen after diesel exhaust exposure, and have even suggested an augmentation of vascular function. This raises the question of the cardiovascular effects of the gaseous pollutants, the most abundant of which is nitrogen dioxide. In this study we plan to investigate the cardiovascular effects of nitrogen dioxide exposure.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Basic Science
- 盲法
- Triple (Participant, Investigator, Outcomes Assessor)
入排标准
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Healthy male volunteers
排除标准
- •Current smokers
- •Significant occupational exposure to air pollution
- •Regular medication use
- •Intercurrent illness
结局指标
主要结局
Forearm blood flow measured by venous occlusion plethysmography in response to intraarterial vasodilators (acetylcholine, sodium nitroprusside, bradykinin and verapamil)
时间窗: 4-6 hours after exposure
次要结局
- Plasma t-PA concentrations after infusion of bradykinin(During forearm study)
- Exhaled nitric oxide(4-6 hours after exposure)