Variations of cardiac output are frequent in pregnant women during obstetrical procedures, and may participate to poor foetal outcomes through decrease of uteroplacental bloodflow. Thus, monitoring maternal cardiac output appears of major interest, as it would open the way to early initiation of hemodynamic supportive management. The ccNexfin© is a non-invasive hemodynamic monitoring device, whose relevance for continuous monitoring of cardiac output has been reported in a non-pregnant population. The hypothesis is that ccNexfin© gives acceptable measurement of maternal cardiac output in pregnant women.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
100
Measurement of cardiac output by ccNexfin © comparatively to transthoracic echocardiography Subjects participating to the study will be simultaneously measured for cardiac output by ccNexfin © and transthoracic echocardiography. Echocardiographic measurements of cardiac output will be blinded to values measured by ccNexfin ©. For each participant, a first measurement of cardiac output will be performed in the supine position and then after 1 minute of strict left lateral position.
Hôpital coeur poumon, CHU
Lille, France
Intra-class correlation coefficient between values of supine position cardiac output evaluated simultaneously by transthoracic echocardiography (measured in liters / minute) and ccNexfin © (measured in liters / minute)
Time frame: 1 minute after positioning in supine position
Cohen's Kappa coefficient between changes in maternal ejection volume observed from supine position to left lateral position, evaluated by transthoracic echocardiography (in %) and ccNexfin © (in %) respectively, at the 10% threshold of variation
Time frame: Maternal ejection volume in supine position: 1 minute after positioning in supine position Maternal ejection volume in left lateral position: 1 minute after positioning in left lateral position
Cohen's Kappa coefficient between changes in maternal cardiac output observed from supine position to left lateral position, assessed by transthoracic echocardiography (in %) and ccNexfin © (in %) respectively, at the 15% threshold of variation
Time frame: Maternal cardiac output in supine position: 1 minute after positioning in supine position Maternal cardiac output in left lateral position: 1 minute after positioning in left lateral position
Intra-class correlation coefficient between left lateral position cardiac output values assessed simultaneously by transthoracic echocardiography (measured in liters / minute) and ccNexfin © (measured in liters / minute)
Time frame: 1 minute after positioning in left lateral position
Pearson correlation coefficient between values of supine position maternal cardiac output evaluated by transthoracic echocardiography (measured in liters / minute) and ccNexfin © (measured in liters / minute), respectively
Time frame: 1 minute after positioning in supine position
Pearson correlation coefficient between values of left lateral position maternal cardiac output evaluated by transthoracic echocardiography (measured in liters / minute) and ccNexfin © (measured in liters / minute), respectively
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Time frame: 1 minute after positioning in left lateral position