Diameter-reflux relationship in perforating veins of patients with varicose veins João Luis Sandri, MD, Fanilda S. Barros, MD, Sandra Pontes, MD, Claudio Jacques, MD, Sergio X. Salles-Cunha, PhD Journal of Vascular Surgery Volume 30, Issue 5, Pages 867-875 (November 1999) DOI: 10.1016/S0741-5214(99)70011-X Copyright © 1999 Society for Vascular Surgery and International Society Terms and Conditions
Fig. 1 Color flow duplex ultrasound scan of a medial calf perforating vein. Diameter was measured as the vein traversed the fascia. Flow is in the superficial-to-deep vein direction on the top and deep-to-superficial vein direction on the bottom (reflux). Journal of Vascular Surgery 1999 30, 867-875DOI: (10.1016/S0741-5214(99)70011-X) Copyright © 1999 Society for Vascular Surgery and International Society Terms and Conditions
Fig. 2 Cumulative predictive values for reflux in calf perforating veins. Cumulative negative- and positive-predictive values were calculated for diameters smaller than or larger than that plotted at the horizontal axis, respectively. NPV, negative-predictive value; PPV, positive predictive value. Journal of Vascular Surgery 1999 30, 867-875DOI: (10.1016/S0741-5214(99)70011-X) Copyright © 1999 Society for Vascular Surgery and International Society Terms and Conditions
Fig. 3 Interval predictive values for reflux in calf perforating veins. Interval positive- and negative-predictive values were calculated for 0.5 mm ranges around the center values plotted. NPV, negative-predictive value; PPV, positive-predictive value. Journal of Vascular Surgery 1999 30, 867-875DOI: (10.1016/S0741-5214(99)70011-X) Copyright © 1999 Society for Vascular Surgery and International Society Terms and Conditions