Table 3 Comparison between liquid sclerotherapy and foam sclerotherapy (citation from the medical package insert of Polidocasklerol with partial modification).

Liquid sclerotherapy	Foam sclerotherapy
Inject Polidocasklerol slowly. (There are no instructions about leg position.)	Slowly inject the foam sclerosant by elevating the lower extremities.
After injecting Polidocasklerol, immediately compress the injection site using compression material, etc., and then apply elastic bandage or elastic stocking to achieve vascular endothelial adhesion.	After injecting the foam sclerosant, cover the injection site and avoid the exercise of lower extremities for 2 to 5 minutes and not to do Valsalva maneuver or muscle activities.
	When compressing the injection site, avoid immediate compression and compress the injection site about 10 minutes after the injection in the treatment of great and small saphenous veins or about 5 minutes after the injection in the treatment of branch varicose veins, recurrent varicose veins or perforating veins using compression material, etc.
	If foam sclerotherapy is performed in patients with a history of severe cerebrovascular attack, pulmonary hypertension, or migraine with aura, confirm the presence of foramen ovale, etc., before performing foam sclerotherapy.
Maximum daily dose: 1%; 60 kg 12.0 mL	Maximum daily dose: 1%; 60 kg 12.0 mL (<2 mg/kg)
【warning】 1) Do not inject Polidocasklerol into an artery. There is no description about usage during an operation.	【warning】 1) Do not inject Polidocasklerol into an artery. There is no description about usage during an operation.