- P-ISSN 1010-0695
- E-ISSN 2288-3339
Backgrounds; Although several efforts have been made recently to grade the severity of sublingual veins, these methods still meet some problems; inspectors' subjectiveness and diversity of lighting conditions. Objectives; The purpose of our study was to quantify the severity of sublingual veins using CDs(color differences), and to verify clinical validity of the parameters of sublingual veins using CDs. Methods; We photographed the inferior surface of subjects' tongue from 74 subjects. CDs were computed through two sets of mean L*a*b* values extracted from BRC(black reference color) and the inferior surface of the tongue. We assumed that SVI(sublingual veins index)-normalized percentage of a reciprocal of CDs between BRC and the inferior surface of the tongue including sublingual veins- and BISV(black index of sublingual veins)-percentage of a reciprocal of CDs between BRC and the main trunk of sublingual veins- could be applied as quantitative parameters of sublingual veins and examined whether there are meaningful correlations between CDs and subjective grading by the clinicians or not. Results; There were high positive correlations of SVI and BISV to clinician evaluation respectively(r=0.715, 0.634). We computed a multiple regression equation which includes SVI and BISV as independent factors(r2=0.60); Y= 0.711+ 0.046X1+ 0.205X2 (Y; the severity of sublingual veins, X1; SVI, X2; BISV). Conclusions; We conclude that the severity of sublingual veins can be quantified through SVI and BISV, minimizing the inspectors’ subjectiveness and the diversity of lighting conditions.