A Simple Clinical Tool to Help Diagnose Pulmonary Embolism: Phase 1
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- Mayo Clinic
- 入组人数
- 64
- 试验地点
- 2
- 主要终点
- Change in oxygen saturation using augmented pulse oximetry for patients with and without pulmonary embolism.
研究概览
简要总结
The goal of this project is to determine if the change in oxygen saturation during deep inspiration ("augmented pulse oximetry") can be used as a method to rule out pulmonary embolism (PE). The investigators propose to evaluate a simple, non-invasive clinical tool to help rule out PE. The investigators plan to measure the oxygen saturation of 40 consecutive patients with newly-diagnosed PE (within 60 minutes of diagnosis) and 80 matched controls who do not have a PE. Trained, blinded Respiratory Therapists or Study Coordinators will record each patient's oxygen saturation before, during, and after a 2-minute period of deep inspirations (vital capacity [the maximal amount of air that can be inhaled, measured in milliliters]) using an incentive spirometer. The investigators' central hypothesis is that persons with a PE will not respond to augmented pulse oximetry and will not significantly improve or normalize their oxygen saturation.
详细描述
Patients will be identified and enrolled by the Mayo Clinic St. Marys Emergency Department staff as they are undergoing medical care in the Emergency Department.
The investigators will calculate the difference in oxygen saturation pre- and post-deep inspiration (ΔSpO2 at 1 minute, 2 minutes and 4 minutes), and then correlate these values with the CT result.
In cases of PE, The investigators expect the SpO2 to remain unchanged, or to change less than 3-5%. The investigators expect alternate hypoxemic conditions to have a significantly greater increase in SpO2.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Diagnostic
- 盲法
- Single (Care Provider)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •18 years of age or greater.
- •Agrees and able to participate in the study.
- •Room air SpO2 (oxygen saturation) less than 92% and newly-diagnosed PE (or controls with no PE) based on CT angiogram result.
排除标准
- •Clinical concern for instability.
- •Systolic blood pressure less than 100 mm Hg.
- •Heart rate ≥140 beats per minute.
- •Oxygen saturation less than 85% with more than 4 L supplemental oxygen.
- •Unable to participate/comply with instructions for using the incentive spirometer.
- •Patients from the Federal Medical Center in Rochester, Minnesota.
- •Patients who do not speak English (due to the need for expediency).
- •Patients will be under the care of the Emergency Department team who have the skills and resources to monitor and treat patients if they were to become unstable.
结局指标
主要结局
Change in oxygen saturation using augmented pulse oximetry for patients with and without pulmonary embolism.
时间窗: Oxygen saturation (SpO2) will be recorded prior to using the spirometer, at 1 minute (during use of the spirometer), at 2 minutes (at the end of using the spirometer), and at 4 minutes.
Trained, blinded Respiratory Therapists or Study Coordinators will record each patient's oxygen saturation before, during, and after a 2-minute period of deep inspirations (vital capacity) using an incentive spirometer. The investigators will calculate the difference in oxygen saturation pre- and post-deep inspiration (ΔSpO2 at 1 minute, 2 minutes and 4 minutes), and then correlate these values with the CT result.
次要结局
- Vital capacity (the maximal amount of air that can be inhaled, measured in milliliters) during augmented pulse oximetry.(The single maximum value obtained prior to using the spirometer, at 1 minute (during use of the spirometer), at 2 minutes (at the end of using the spirometer), and at 4 minutes.)