Wearable respiratory inductance plethysmography device and method for respiratory activity analysis

A method for extracting physiological parameters of a person, the method comprising the steps of:

• providing a wearable garment, the wearable garment fitting a body portion of the person;
• measuring at least one plethysmographic signal using at least one wire supported by or embedded into the garment, each wire forming a loop around the body part;
• extracting the plethysmographic signal measured by each wire using an electronic device supported by the garment, the electronic device comprising a oscillator connected to each wire;
• converting analog information measured by the Colpitts oscillator into digital analyzable information;
• measuring the temperature of the electronic device;
• calculating a corrected plethysmographic signal from extracted plethysmographic signal using the measured temperature of the electronic device.

A method for calibrating extraction of physiological parameters of a person, the method comprising:

• the person wearing a garment comprising at least one wire supported by or embedded into the garment, each wire being configured to form a loop around the body part when the person wears the garment for measuring a plethysmographic signal;
• extracting the plethysmographic signal measured by each wire using an electronic device supported by the garment, the electronic device comprising a oscillator connected to each wire;
• measuring data regarding vital capacity of the person by taking a plurality of measurements;
• storing the vital capacity measurements in a data storage in communication with the electronic device;
• calculating vital capacity coefficient of the person at the time of acquisition of the measurements using the vital capacity measurements;
• calculating a respiration coefficient parameter based on the vital coefficient of the person;
• calculating a corrected plethysmographic signal by multiplying by the respiration coefficient parameter with the extracted plethysmographic signal.