Blood pressure measurement device and calibration method thereof

A calibration method of a blood pressure measurement device, comprising:

• measuring a PPG signal and an ECG signal and calculating PPG parameters, by a blood pressure measurement body, wherein the PPG parameters include a PPG transmission time and a PPG peak-to-valley ratio;
• inflating a calibrator;
• deflating the calibrator, and when a systolic pressure is detected, sending a systolic pressure notification signal and a systolic pressure at a first instance to the blood pressure measurement body;
• after receiving, by the blood pressure measurement body, the systolic pressure notification signal, determining a cardiac cycle that the first instance belongs to, and calculating and recording the PPG parameters in a same cardiac cycle as the systolic pressure, wherein the PPG parameters at least include the PPG transmission time;
• when a diastolic pressure is detected, sending a diastolic pressure notification signal and a diastolic pressure at a second instance to the blood pressure measurement body;
• after receiving, by the blood pressure measurement body, the diastolic pressure notification signal, determining the cardiac cycle that the second instance belongs to, and calculating and recording the PPG parameters in the same cardiac cycle as the diastolic pressure, wherein the PPG parameters at least include the PPG peak-to-valley ratio, and
• updating a PPG parameter-blood pressure equation according to the PPG transmission time and the PPG peak-to-valley ratio.

A calibration method of a blood pressure measurement device, comprising:

• measuring a PPG signal and an ECG signal and calculating PPG parameters, by a blood pressure measurement body, wherein the PPG parameters include a PPG transmission time and a PPG peak-to-valley ratio;
• when a systolic pressure is detected by a calibrator, receiving a systolic pressure notification signal and a systolic pressure at a first instance;
• determining a cardiac cycle that the first instance belongs to, and calculating and recording the PPG parameters in a same cardiac cycle as the systolic pressure, wherein the PPG parameters at least include the PPG transmission time;
• when a diastolic pressure is detected by the calibrator, receiving a diastolic pressure notification signal and a diastolic pressure at a second instance;
• determining the cardiac cycle that the second instance belongs to, and calculating and recording the PPG parameters in the same cardiac cycle as the diastolic pressure, wherein the PPG parameters include the PPG peak-to-valley ratio, and
• updating a PPG parameter-blood pressure equation according to the PPG transmission time and the PPG peak-to-valley ratio.