Study on differences of colorimetric between Yin Zheng and Yang Zheng jaundice in patients with hepatogenic jaundice
Objective: To study the data of facial complexion in hepatogenic jaundice which were detected by optical spectrum colorimetry,and analyse the differences of colorimetric between Yin Zheng and Yang Zheng jaundice.Methods: Facial complexion data from 268 eligible hepatogenic jaundice patients were collected and divided into Yin Zheng and Yang Zheng jaundice groups according to the feature of the clinical classification.The distribution in the CIE LAB uniform color space were observed,and the difference of overall colorimetric,clarity,chroma,saturation and tone were analysed.Results: There were different distribution area of the facial complexion between Yin Zheng and Yang Zheng jaundice groups in the CIE LAB color threedimensional space,while the values of L* of Yang Zheng jaundice were higher than that of Yin Zheng jaundice(P 0.001).The difference of overall colorimetric on tip of the nose and forehead were 9.98 and 5.82 error of chromatic units,with the largest value clarity.Conclusion: There is obvious differences of colorimetric between Yin Zheng and Yang Zheng jaundice groups,which are consistent with the characteristic in clinical,and could be the reference for TCM syndrome classification in jaundice.