Electrical cardiometry followed daily change; rapid shifts are untested
In 55 preterm infants, 87%-88% of analyzed day-to-day cardiac-output changes met a trend benchmark after small shifts were excluded.
The hot take
This study gives electrical cardiometry a narrow win: it often moved in the same direction as daily echocardiographic cardiac-output estimates during the first 72 hours. It does not show that the monitor can recognize rapid low-flow events, replace echocardiography, or improve treatment decisions.
That distinction matters because a monitor can track change without providing an interchangeable absolute value. Trending is one validation question; accuracy, precision, alarm performance, and clinical utility are others.
What was tested
This prospective NEO-ICM sub-analysis included 55 infants from one Italian NICU who were born before 32 weeks, weighed less than 1500 g at birth, or met both criteria. Mean gestational age was 29.3 weeks and mean birth weight was 1175 g. Electrical cardiometry sampled beat to beat for 72 hours, while one experienced operator, blinded to the monitor data, performed echocardiographic cardiac-output measurements once daily.
- 1
Enroll 55 preterm infants
Single NICU; gestation under 32 weeks, birth weight under 1500 g, or both.
- 2
Measure for the first 72 hours
Beat-to-beat electrical cardiometry plus one blinded echocardiographic estimate each day.
- 3
Calculate day-to-day change
There were 55 paired changes from day 1 to 2 and 45 from day 2 to 3.
- 4
Remove very small changes
The polar-plot analysis excluded vectors inside a pragmatic 20% central zone.
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