Umbilical artery catheters and blood flow velocities in the superior mesenteric artery: Effect of insertion, removal, aspiration, and bolus infusion

Purpose We studied whether umbilical artery catheters (UACs) affect blood flow in the superior mesenteric artery (SMA) of neonates. Methods Noninvasive duplex pulsed Doppler sonography was used to measure peak systolic velocity, end‐diastolic velocity, and mean flow velocity in the SMA. The resistan...

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