Blood pressure estimation apparatus, blood pressure estimation method, and non-transitory computer-readable recording medium

A non-transitory computer-readable recording medium storing a program for causing a computer to:

• (f1) acquire a pulse wave signal of a user from a pulse wave sensor and acquire an electrocardiogram signal of the user from an electrocardiogram sensor,
• (f2) acquire a pulse wave signal feature by using the pulse wave signal of the user, the pulse wave signal feature being a time-frequency feature of the pulse wave signal,
• (f3) acquire an electrocardiogram signal feature by using the electrocardiogram signal of the user, the electrocardiogram signal feature being a time-frequency feature of the electrocardiogram signal
• (f4) acquire a pulse wave propagation time by using the pulse wave signal of the user and the electrocardiogram signal of the user,
• (f5) select a blood pressure group by using the pulse wave signal feature, the electrocardiogram signal feature, and the pulse wave propagation time, the blood pressure group being indicative of a relationship between a pulse wave propagation time and blood pressure of the user, and
• (f6) estimate a blood pressure value of the user by using the blood pressure group, the pulse wave signal feature, the electrocardiogram signal feature, and the pulse wave propagation time.

A blood pressure estimation method comprising:

• (f1) acquiring a pulse wave signal of a user from a pulse wave sensor and acquiring an electrocardiogram signal of the user from an electrocardiogram sensor;
• (f2) acquiring a pulse wave signal feature by using the pulse wave signal of the user;
• (f3) acquiring an electrocardiogram signal feature by using the electrocardiogram signal of the user;
• (f4) acquiring a pulse wave propagation time by using the pulse wave signal of the user and the electrocardiogram signal of the user;
• (f5) selecting a blood pressure group by using the pulse wave signal feature, the electrocardiogram signal feature, and the pulse wave propagation time, the blood pressure group being indicative of a relationship between a pulse wave propagation time and blood pressure of the user;
• and
• (f6) estimating a blood pressure value of the user by using the blood pressure group, the pulse wave signal feature, the electrocardiogram signal feature, and the pulse wave propagation time.