Affiliations: [a] School of Public Health, Shanghai University of Traditional Chinese Medicine, Shanghai, China | [b] Shanghai University of Traditional Chinese Medicine, Shanghai, China | [c] Shanghai University of Traditional Chinese Medicine, Shanghai, China | [d] Shanghai University of Traditional Chinese Medicine, Shanghai, China | [e] Shanghai University of Traditional Chinese Medicine, Shanghai, China | [f] Shanghai University of Traditional Chinese Medicine, Shanghai, China
Correspondence:
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Corresponding author: Jiatuo Xu, Shanghai University of Traditional Chinese Medicine, 1200 Cailun Road, Pudong, Shanghai, China. E-mail: xjt@fudan.edu.cn.
Abstract: BACKGROUND: The sublingual vein (SV) is a specialized diagnostic method used in Traditional Chinese Medicine (TCM). Despite its ability to objectively reflect blood flow, SV is often overlooked in clinical practice. OBJECTIVE: This study aims to analyze the core characteristics of SV and investigate the in-depth relationship between its digital characteristics and hypertension. The goal is to find a link between SV and hypertension and break out of the current situation. METHODS: Modern digital analysis techniques were applied to the traditional SV diagnostic theory. In a controlled study with 204 participants, the digital characteristics of SV were documented using TFDA-1, and its color value was analyzed using TDAS. Morphological characteristics of SV, such as trunklength, width, and tortuosity, were examined by combining computer vision with expert interpretation. This involved the application of automatic ranging methods and a rectangular approximation algorithm, which are novel approaches in the field of TCM. The t-test and Mann-Whitney U test were used to analyze the digital characteristics of SV in hypertension. Binary logistic regression and neural network models were established using machine learning to explore the deep relationship between SV characteristics and hypertension. RESULTS: There was a significant difference of the tortuosity of SV between the two groups (Z=-2.629, p= 0.009). The results revealed thick width of SV (OR = 2.64, 95% CI: 1.02–6.79) was the risk factor for hypertension. Addition of SV characteristics improved overall percent correct for hypertension prediction to 80%. CONCLUSION: TCM method of diagnosis of SV has been greatly expanded in terms of technical means, and the close relationship between SV and hypertension has been found in clinical data.
Keywords: Sublingual veins, digital characteristics, hypertension
