Assessment of Stroke Volume in Shock Using Echocardiography Versus Bioreactive Impedance
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 30
- 试验地点
- 2
- 主要终点
- Correlation Between Stroke Volume Measurements by Echocardiography and Bioreactance Monitoring
研究概览
简要总结
This study aims to evaluate the correlation between stroke volume measurements obtained by transthoracic echocardiography and bioreactance-based noninvasive cardiac output monitoring. The primary objective is to assess the level of agreement between these two modalities in critically ill patients.
详细描述
In this prospective observational study, patients presenting with clinical signs of shock will be enrolled after obtaining informed consent. Stroke volume (SV) will be measured using both transthoracic echocardiography and bioreactance-based noninvasive cardiac output monitoring (Cheetah NICOM). SV will be recorded before and after passive leg raising (PLR) to evaluate the correlation between the two methods in terms of absolute values and directional changes (increase or decrease). No therapeutic intervention will be performed as part of the study; all clinical decisions will remain under the discretion of the treating medical team.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 90 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Age ≥ 18 years
- •Clinical diagnosis of shock as determined by the treating ICU physician (e.g., hypotension requiring vasopressors or evidence of end-organ hypoperfusion)
- •Able to obtain informed consent from the patient or a legally authorized representative
- •Enrollment within 24 hours of ICU admission
排除标准
- •Pregnancy
- •Known severe aortic valve disease or dynamic left ventricular outflow tract obstruction
- •Morbid obesity (BMI > 40) that precludes accurate echocardiographic imaging Presence of cardiac arrhythmias (e.g., atrial fibrillation with rapid ventricular response) affecting stroke volume measurements
- •Implanted cardiac assist devices (e.g., LVAD, pacemaker dependency)
- •Imminent death or decision for comfort care only
研究组 & 干预措施
Shock Patients
This cohort includes adult patients presenting with clinical signs of shock in the intensive care unit. Each participant will undergo stroke volume measurement using both transthoracic echocardiography and bioreactance-based monitoring (Cheetah NICOM) before and after passive leg raising. No therapeutic intervention will be performed as part of the study.
干预措施: Cheetah NICOM (Device)
结局指标
主要结局
Correlation Between Stroke Volume Measurements by Echocardiography and Bioreactance Monitoring
时间窗: Within 1 hour of enrollment
Pearson correlation coefficient between stroke volume measurements obtained using transthoracic echocardiography and those obtained using bioreactance-based monitoring (Cheetah NICOM) in response to passive leg raising.
次要结局
未报告次要终点