Volume 90 Issue 4, October 2021
Blood flow velocities recorded by ultrasound during head tilt in healthy term infants. (Top) Unsupervised cluster analysis revealed five distinct initial responses to tilt. The dotted lines indicate the tilt. Colored lines are individual recordings, and the black lines are cluster means. (Bottom) A typical NeoDoppler recording of blood flow velocity (BFV) per heartbeat during the test. The neonate was kept in a supine position for 40 s, then tilted and kept upright for 200 s before being laid back down. The four gray boxes show the time segments (S1 -S4) used for further analysis, and the green box shows the time window used for cluster analysis. The neonate's position is illustrated by the silhouettes. Blood pressure was measured before the test and at 120 s.See article by Jarmund et al. on page 888.
Editor's Focus
-
Advertisement
