Non-invasively neonatal cardiac output can be measured by multiple methods, but the gold standard still remains conventional echocardiography. It is accurate, but needs a long training for new users to assess cardiac function. Continuous-wave Doppler ultrasound monitor USCOM is a relatively new monitor which can perform faster and less complex cardiac function measurement, also it is easier for the operator to get trained. The aim of the study is to assess the level of agreement between cardiac output measured with conventional echocardiography and with USCOM, to present normal ranges for neonates of different gestational age and to look for early signs of hemodynamic changes during sepsis.
Study Type
OBSERVATIONAL
Enrollment
163
doplerometry with USCOM and echocardiograph is made for assessing central blood flow and spectroscopy with NONIN- for the blood flow in individual peripheral organs (brain and kidney)
Vilnius University, Neonatology Centre
Vilnius, Lithuania
Weight measurement
weight in grams
Time frame: 1 minute
Height measurement
length in centimeters
Time frame: 1 minute
Chest and head circumference
Chest and head circumference in centimeters
Time frame: 1 minute
Blood pressure measurement
non- invasive arterial blood pressure measurement in mmHg
Time frame: 1 minute
Pulse rate measurement
pulse rate in beats per minute
Time frame: 1 minute
Near- Infrared Spectroscopy for regional blood flow
One sensor on the forehead, another- on the back to check for regional blood flow in the brain and kidney with Near- Infrared Spectroscopy
Time frame: 15-20 minutes
Echocardioscopy for left ventricular outflow tract diameter
Echocardiography for left ventricular outflow tract diameter in centimeters
Time frame: 2-3 minutes
Echocardioscopy to measure velocity time integral
Echocardiography to measure velocity time integral at the aortic valve in centimeters. After that the software of the device calculates cardiac output.
Time frame: 3 minutes
USCOM examination
USCOM 1A uses continuous wave Doppler for flow curves, which are obtained at the suprasternal notch for an optimal flow signal at the aortic valve. The software of the device calculates cardiac output then
Time frame: 3-5 minutes
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