Table 3: Comparison of valve patterns across studied populations.

Valve patternAdult ultrasound (blended all veins)Pediatric ultrasound (blended all veins)

Type 1 (valve next to valve)6.7%0%
Type 2 (valve central to branch)19.2%20%
Type 3 (valve peripheral to branch)54.2%40%
Type 4 (valve alone)20.0%40%