Circulation dynamics measuring apparatus, circulation dynamics measuring method, blood pressure measuring method and circulation dynamics sensor

A circulation dynamics measuring apparatus comprising:

• a circulation sensor portion for transmitting and receiving a wave to and from the inside of a living body through a surface of the living body;
• and a processing portion for calculating a circulation dynamics on the basis of the received wave,
• wherein the circulation sensor portion has means for measuring a volume of a blood vessel and a blood flow rate, and the processing portion calculates an information concerned with viscosity of the blood on the basis of the measured volume and blood flow rate.

A circulation dynamics measuring apparatus comprising:

• a circulation sensor portion for transmitting and receiving a wave to and from the inside of a living body through a surface of the living body;
• and a processing portion for calculating a circulation dynamics on the basis of the received wave,
• wherein the circulation sensor portion has means for measuring a blood flow rate and means for measuring a blood pressure, and the processing portion derives a resistance component concerned with a shape of the blood vessel on the basis of a viscosity value of the blood and the measured blood pressure and blood flow rate.

A method of measuring a circulation dynamics, comprising:

• deriving a resistance component concerned with a shape of a blood vessel on the basis of a viscosity value, a blood pressure and a blood flow rate of blood which are measured in advance;
• and
• calculating information concerned with the viscosity of the blood on the basis of the blood pressure and the blood flow rate.

A circulation dynamics sensor comprising at least two sheets of piezoelectric devices for transmitting and receiving an ultrasonic wave, at least one sheet of the piezoelectric devices serving to measure a blood flow velocity, at least the other sheet of the piezoelectric devices serving to measure a blood vessel diameter,

• wherein the piezoelectric device for measuring a blood flow velocity, and the piezoelectric device for measuring a blood vessel diameter are arranged on the same substrate.