Patent ID: 11944460
Assignee: KOREA INSTITUTE OF ORIENTAL MEDICINE
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 9:
10. An apparatus for determining a sharpness index of a pulse wave signal, the apparatus comprising:
a pulse wave signal receiver configured to receive a pulse wave signal; and
a sharpness index determiner configured to determine a first reference line starting point and a second reference line starting point based on a curvature of the pulse wave signal, determine a first reference line connecting the first reference line starting point and a first reference line ending point by determining the first reference line ending point by applying an intersecting tangent method to the first reference line starting point, wherein the first reference line starting point is determined to be a point at which a first derivative result of the pulse wave signal is maximized, determine a second reference line connecting the second reference line starting point and a second reference line ending point by determining the second reference line ending point by applying the intersecting tangent method to the second reference line starting point, and determine a sharpness index using a peak point of the pulse wave signal, the first reference line, and the second reference line.