Preoperative duplex imaging is required before all operations for primary varicose veins.
Darke
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SG
D006801:Humans; D011300:Preoperative Care / Q000295:instrumentation; D012501:Saphenous Vein; D018616:Ultrasonography, Doppler, Duplex / Q000295:instrumentation*; D014648:Varicose Veins / Q000000981:diagnostic imaging*; D014689:Venous Insufficiency / Q000000981:diagnostic imaging