Why the study?
Since pulse feeling has been translated using three-dimensional pulse mapping, mathematics such as polynomial analysis can be applied to describe three-dimensional pulse mapping patterns and elucidate their clinical indices.
The L-cube polynomial axis ratio r may serve as a useful index for recognizing normal and hypertensive string-like pulse mappings in Chinese medicine.
r may index arterial stiffness; leaves open validation for pulse mapping in hypertension.
Objective Since pulse feeling has been well translated using three-dimensional pulse mapping (3DPM) followed by pulse mapping analysis (PMA) instead of pulse wave analysis (PWA), mathematics such as polynomial analysis can be further applied for the description of 3DPM patterns. Methods To elucidate the clinical indices of 3DPM patterns, an L-cube polynomial consisting of a major exponential function is proposed based on the Zernike polynomials. Results The axis ratio r in the L-cube polynomial, which geometrically represents the ratio of the 3DPM longitudinal and transverse axes, is closely related to the augmentation index AIx showing the degree of artery stiffness during a cold pressor test (CPT). Conclusion The axis ratio r is a useful index to recognize normal and hypertensive string-like pulse mappings. It is shown that the L-cube polynomial may become a very useful tool to elucidate valuable 3DPM indices from the CM pulse feeling database for clinical applications.
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Luo et al. (2019) studied this question.
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