Currently, the gold standard method to estimate CO is the thermodilution technique, pulmonary artery catheter (PAC) and PiCCO system included, however, the invasiveness and complexity of the thermodilution technique have limited their usefulness in many clinical scenarios. By measuring the carotid blood flow, continuous carotid doppler technique has been reported to noninvasively estimate cardiac output (CO) and other parameters related to cardiac contractility and fluid status in various cardiovascular disorders. However, to the best of our knowledge, few study has been reported to evaluate the consistency of this technique in cardiac surgery patients. The aim of this study is to evaluate the tracking ability of CO changes measured by continuous carotid doppler technique in cardiac surgery patients, use the thermodilution technique as the referenced.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
200
transfer a patient from semi-recumbent position to supine position with a 45° leg lifting
infusion dobutamine
Zhongshan hospital Fudan University
Shanghai, Shanghai Municipality, China
RECRUITINGcardiac output by thermodilution method
measuring cardiac output using thermodilution method
Time frame: 5 minutes after the patients was sedated
cardiac output by continuous carotid doppler blood flow
measuring cardiac output using continuous carotid doppler blood flow
Time frame: 5minutes after the patients was sedated
cardiac output by thermodilution method
measuring cardiac output using thermodilution method
Time frame: 2 minutes after passive leg raising
cardiac output by continuous carotid doppler blood flow
measuring cardiac output using continuous carotid doppler blood flow
Time frame: 2 minutes after passive leg raising
cardiac output by thermodilution method
measuring cardiac output using thermodilution method
Time frame: 15 minutes after termination of passive leg raising
cardiac output by continuous carotid doppler blood flow
measuring cardiac output using continuous carotid doppler blood flow
Time frame: 15 minutes after termination of passive leg raising
cardiac output by thermodilution method
measuring cardiac output using thermodilution method
Time frame: 30 minutes after dobutamine infusion
cardiac output by continuous carotid doppler blood flow
measuring cardiac output using continuous carotid doppler blood flow
Time frame: 30 minutes after dobutamine infusion
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