INTRODUCCION : la Insuficiencia Venosa Cronica (IVC) es una disfuncion del sistema venoso de los miembros inferiores, en la que se forma un corto circuito veno-venoso con alteracion en el flujo fisiologico de la sangre. OBJETIVO: estimar el grado de concordancia diagnostica entre la dilatacion de la vena safena mayor y la presencia de insuficiencia venosa cronica (IVC). METODOLOGIA: estudio de concordancia diagnostica, en el que se incluyeron todos los pacientes que acudieron entre los meses de abril y mayo del 2011 al servicio de radiologia del Hospital Universitario del Caribe, Cartagena, Colombia para practicarse ecografia doppler color de miembros inferiores por sospecha de IVC. Los datos fueron almacenados y analizados por medio del programa estadistico EPI – INFO version 3.5.1. El analisis estadistico se centro en la estimacion del indice de concordancia Kappa, del diametro de la safena con la presencia de IVC. Ademas se calcularon los parametros de validez diagnostica como sensibilidad, especificidad, valores predictivos y cocientes de probabilidad. RESULTADOS: se reclutaron 77 pacientes, 64 mujeres y 13 hombres. Del total de pacientes, 47 tuvieron reflujo, y de estos, 41 presentaban dilatacion de la vena safena mayor, por lo que la dilatacion de esta vena per se tiene sensibilidad de 87.2% y especificidad de 93.1% para el diagnostico de IVC, con valor predictivo positivo (VPP) de 95.3% y valor predictivo negativo (VPN) de 81.8%. CONCLUSION: existe buena concordancia diagnostica entre la dilatacion de la vena safena mayor y la IVC. Rev.cienc.biomed. 2012;3(2):234-241 PALABRAS CLAVES Insuficiencia venosa; Ecografia doppler color; Vena safena. SUMMARY Introduction: Chronic venous insufficiency (CVI) is a dysfunction of the venous system of the inferior limbs, in which it is formed a venovenous short circuit with alteration in the physiologic flow of the blood. Objective: To estimate the degree of diagnostic concordance between the dilation of the great saphenous vein and the presence of chronic venous insufficiency (CVI). Methods: Diagnostic concordance study, where were included all the patients that went between the months of April and May 2011 to the service of radiology of the Hospital Universitario del Caribe, Cartagena, Colombia to make itself a colour Doppler ultrasound of inferior limbs because of suspicion of CIV. Data was saved and analyzed by means of the statistical program EPI-INFO version 3.5.1. Statistical analysis was focused in the estimation of the kappa concordance index, the diameter of the saphenous with the presence of CVI. Moreover there were calculated the parameters of diagnostic validity like sensibility, specificity, predictive values and probability quotient. Results: There were recruited 77 patients, 64 women and 13 men. Of the total of patients, 47 had ebb and of them, 41 had dilation of the great saphenous vein, for what the dilation of this vein per se has sensibility of 87.2% and specificity of 93,1% for the diagnosis of CVI with positive predictive value (PPV) of 95.3% and negative predictive value of 81.8%. Conclusion: There is good diagnostic concordance between the dilation of the great saphenous vein and the CVI. Rev.cienc.biomed. 2012;3(2):234-241 KEYWORDS Venous insufficiency; Colour Doppler ultrasound; Saphenous vein.