A comparison between cardiac output monitoring using (minimally invasive) esophageal Doppler and (noninvasive) thoracic electrical bioimpedance
Completed
- Conditions
- SurgeryMeasurement of cardiac output with different devices in patients sheduled for major abdominal surgery
- Registration Number
- ISRCTN43678006
- Lead Sponsor
- Maastricht Universitair Medisch Centrum
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Completed
- Sex
- All
- Target Recruitment
- 50
Inclusion Criteria
1. Patients scheduled for elective major abdominal surgery
2. > 18 years old
3. Informed consent
Exclusion Criteria
1. Nasal, pharyngeal, laryngeal or esophageal pathologies
2. Beeding disorders
3. Cardiac arrhythmias
4. Age < 18 years
5. No informed consent
Study & Design
- Study Type
- Observational
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method 1. Accuracy and precision is measured using Bland Altman analysis by comparing results from the esophageal Doppler to the results of the bioimpedance cardiac output monitor at the eight timepoints. The esophageal Doppler is validated against pulmonary artery catheter, the more or less gold standard of cardiac output measurement. So, the Doppler technique represents the gold standard in this study<br>2. Trending ability of the techniques is evaluated applying four-quadrant plot and polar plot methodology
- Secondary Outcome Measures
Name Time Method Errors in bioimpedance measures are assessed using interruption of the skin's integrity and opening of the abdominal cavity by a surgical incision at the time of surgery