Table 5.

Findings in post-therapeutic control by duplex ultrasound

Circulation and reflux	Morphology and haemodynamics
No circulation	Patency/occlusion	Complete disappearance of the treated vein
Antegrade circulation without reflux (<0.5 s)		Total occlusion (no compressibility) of the treated vein segment
Reflux <1 s		Partial occlusion of the treated vein segment
Reflux >1 s		Total patency of the treated vein segment
	Vein measurements	Diameter before treatment
		Internal diameter after treatment
		Length of occluded segment
		Length of patent segment