Tip 106: UAC position

The tip of an umbilical arterial catheter (UAC) should be at: T6 -T11 (high, associated with a lower incidence of vascular complications but no difference in NEC) or L3 – L5 (low).

  • The ductus arteriosus is at T4 – T5.
  • The coeliac axis is at T12.
  • The aortic bifurcation is at L5.


Rennie & Roberton’s Textbook of Neonatology, 5th Ed, 2005. London: Churchill.

Barrington, K. J. (1999). Umbilical artery catheters in the newborn: effects of position of the catheter tip. Cochrane Database Syst Rev1.

Previously published: 13/05/14, 30/04/15

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