title: Comparative evaluation of duplex-derived parameters in patients with chronic venous insufficiency: correlation with clinical manifestations.
abstract: BACKGROUND
  Quantification of venous reflux is still a matter of debate. Our goal was to compare the duplex-derived parameters between patients with early and advanced chronic venous insufficiency (CVI), and to determine indicative parameters reflecting the progression of CVI.
  
  
  METHODS
  A total of 1,132 limbs in 914 patients with primary valvular incompetence were included. Clinical manifestations were categorized according to the CEAP (clinical, etiologic, anatomic, and pathophysiologic) classification, and the patients were divided into two groups: group I (those with relatively early CVI, C(1-3)E(P),A(S,D,P),P(R)) and group II (those with advanced CVI, C(4-6)E(P),A(S,D,P),P(R)). The distribution of venous insufficiency was determined, and the parameters assessed were the duration of reflux (s), the peak reflux velocity (cm/s), and the flow at peak reflux (mL/s).
  
  
  RESULTS
  There was no notable difference in overall superficial venous reflux between the groups, and the frequency of isolated deep and perforator incompetence did not differ between the groups. The duration of reflux did not improve the discrimination power between the groups. In contrast, the peak reflux velocity had significant discrimination power at the saphenofemoral junction (p < 0.0001), the saphenopopliteal junction (p = 0.0002), in the greater saphenous vein (p < 0.0001), in the superficial femoral vein (p = 0.0041), and in the popliteal vein (p = 0.003). The peak reflux flow was significantly higher in group II at the saphenofemoral junction (p < 0.0001), the saphenopopliteal junction (p = 0.0029), in the greater saphenous vein (p < 0.0001), in the common femoral vein (p = 0.006), in the superficial femoral vein (p = 0.0005), and in the popliteal vein (p = 0.0003).
  
  
  CONCLUSIONS
  Superficial venous insufficiency might play a major role in the development of advanced CVI. The peak reflux velocity and peak reflux volume improve discrimination power between early-stage and advanced CVI.
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.forename: Motohiro
authors.initials: M
authors.lastname: Nozaki
authors.forename: Osamu
authors.initials: O
authors.lastname: Fujiwara
authors.forename: Eika
authors.initials: E
authors.lastname: Yoshida
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016009:Chi-Square Distribution; D002908:Chronic Disease; D018450:Disease Progression; D005260:Female; D006801:Humans; D007866:Leg / Q000098:blood supply; D008297:Male; D018709:Statistics, Nonparametric; D018616:Ultrasonography, Doppler, Duplex; D014689:Venous Insufficiency / Q000000981:diagnostic imaging* / Q000503:physiopathology