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Table 3 Hemodynamic characteristics of the ductus arteriosus (mean ± SD)

From: Bi-level CPAP does not change central blood flow in preterm infants with respiratory distress syndrome

 

nCPAP

Bilevel

p

Ductus arteriosus

   

Pulsatile pattern (%)

57.1

57.1

n/a

Vmax (m/sec)

1.68 ± 0.5

1.46 ± 0.38

0.19

% R-L shunt

6.2 ± 10.6

12.6 ± 11.7

0.22