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Multicenter assessment of venous reflux by duplex ultrasound

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Presentation on theme: "Multicenter assessment of venous reflux by duplex ultrasound"— Presentation transcript:

1 Multicenter assessment of venous reflux by duplex ultrasound
Fedor Lurie, MD, PhD, Anthony Comerota, MD, Bo Eklof, MD, PhD, Robert L. Kistner, MD, Nicos Labropoulos, PhD, DIC, RVT, Joann Lohr, MD, William Marston, MD, Mark Meissner, MD, Gregory Moneta, MD, Peter Neglén, MD, PhD, Diana Neuhardt, RVT, Frank Padberg, MD, Harold J. Welsh, MD  Journal of Vascular Surgery  Volume 55, Issue 2, Pages (February 2012) DOI: /j.jvs Copyright © 2012 Society for Vascular Surgery Terms and Conditions

2 Fig 1 Agreement (%) between interpretations of two replicated studies and the cut point for pathologic reflux. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

3 Fig 2 Reproducibility of reflux time (rt) measurements. Bland-Altman plot is shown (A) before the educational intervention and (B) after the educational intervention (facilitated reproducibility). Mean (M) = (rt1 + rt2)/2; absolute difference = rt1 – rt2. SD, standard deviation. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

4 Fig 3 The difference (absolute value) between reflux time (rt) measured at different times of the day was proportional to the magnitude of reflux time. Mean = (rt1 + rt2)/2; absolute difference = rt1 – rt2. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

5 Fig 4 Agreement (percent) between reflux time (rt) measured at different times of the day is shown in the Bland-Altman plot. Mean (M) = (rt1 + rt2)/2; difference = 100% × (rt1 – rt2)/mean. SD, standard deviation. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

6 Fig 5 Agreement between the measurements performed using manual or automatic compression–decompression is shown in Bland-Altman plot. Mean (M) = (rt1 + rt2)/2; difference = rt1 – rt2. SD, standard deviation. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

7 Fig 6 Agreement between the measurements performed with patients in the two different positions is shown in the Bland-Altman plot. Mean (M) = (rt1 + rt2)/2; difference = rt1 – rt2. SD, standard deviation. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

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