title: Quantification of superficial venous reflux by duplex ultrasound-role of reflux velocity in the assessment the clinical stage of chronic venous insufficiency.
abstract: OBJECTIVE
  This study we compare the duplex-derived parameters of reflux in patients with early and advanced superficial venous insufficiency (SVI) to identify parameters reflecting this.
  
  
  METHODS
  Two thousand and one hundred sixty limbs with primary reflux, categorized according to the CEAP (clinical, etiologic, anatomic and pathophysiologic) classification, and the patients were divided into two groups (group I [C1-3, Ep, As, Pr]; group II [C4-6, Ep, As, Pr]) were studied. The vein diameter, reflux duration(s), mean reflux velocity (MRV; cm/s), peak reflux velocity (PRV; cm/s), and total reflux volume (TRV; ml/s) were determined at the sapheno-femoral junction (SFJ), great saphenous vein (GSV) and sapheno-popliteal junction (SPJ).
  
  
  RESULTS
  Age and the proportion of males were greater in group II. MRV, PRV and TRV were greater in group II at the SFJ, SPJ and in GSV (p <0.01 for all), although the duration of SPJ reflux was non-discriminatory (p = 0.78). From receiver operating characteristic (ROC) curve, optimal cut-off points of 27.8, 47.8, and 36.2 cm/s for the PRV at the SFJ (p <0.01), GSV (p <0.01), and SPJ (p <0.01) discriminated between the two groups.
  
  
  CONCLUSIONS
  PRV and MRV improved discrimination between early and advanced SVI compared to reflux duration.
authors.affiliation: Department of Plastic and Reconstructive Surgery, Tokyo Women's Medical University, Tokyo, Japan.
authors.forename: Hisato
authors.initials: H
authors.lastname: Konoeda
authors.affiliation: Department of Plastic and Reconstructive Surgery, Tokyo Women's Medical University, Tokyo, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamaki
authors.affiliation: Department of Plastic and Reconstructive Surgery, Tokyo Women's Medical University, Tokyo, Japan.
authors.forename: Atsumori
authors.initials: A
authors.lastname: Hamahata
authors.affiliation: Department of Plastic and Reconstructive Surgery, Tokyo Women's Medical University, Tokyo, Japan.
authors.forename: Masakazu
authors.initials: M
authors.lastname: Ochi
authors.affiliation: Department of Plastic and Reconstructive Surgery, Tokyo Women's Medical University, Tokyo, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Sakurai
keywords: duplex scan; superficial venous insufficiency; varicose vein