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.
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Weight measurement
Timeframe: 1 minute
Height measurement
Timeframe: 1 minute
Chest and head circumference
Timeframe: 1 minute
Blood pressure measurement
Timeframe: 1 minute
Pulse rate measurement
Timeframe: 1 minute
Near- Infrared Spectroscopy for regional blood flow
Timeframe: 15-20 minutes
Echocardioscopy for left ventricular outflow tract diameter
Timeframe: 2-3 minutes
Echocardioscopy to measure velocity time integral
Timeframe: 3 minutes
USCOM examination
Timeframe: 3-5 minutes