DEVICE FOR CONTINUOUS NON-INVASIVE BLOOD PRESSURE MEASUREMENT Russian patent published in 2017 - IPC A61B5/22 

FIELD: medicine.

SUBSTANCE: device for continuous non-invasive blood pressure measurement comprises an applicator (10) installed in the body (11), made in the form of a liquid-filled cavity (12) with a flexible membrane (13) to mechanically contact the patient's tissues (100) directly above the radial artery (101) and the fluid pressure transducer (14) associated with the cavity for pressure conversion to an electrical signal. The device also comprises means for membrane state regulation during measurement based on the control loop and the control unit (50) based on the microcontroller. The control loop comprises interconnected optical sensor (20) for membrane (13) positioning, fluid pressure generation unit (55), and compressor (40) communicating with the applicator cavity. The control unit (50) is connected to the computer (60) and is configured to calculate the parameters and record the blood pressure. The means for membrane (13) state regulation is adapted to maintain the initial flat state of the membrane (13) corresponding to the zero pressure difference outside and within the cavity (12), in the absence of mechanical contact of the membrane (13) with the patient's body (100). The control unit (50) is configured to predict the signal parameters of the subsequent pulse wave based on the value of the local signal period for the previous time interval calculated by the autocorrelation function (ACF) and comprises software-generated blood pressure calculation module, ACF calculation module, local period calculation module, module for prediction of the subsequent pulse wave parameters, and also unit for fluid pressure creation in the cavity.

EFFECT: increased accuracy and reliability of blood pressure determination by predicting the signal of the subsequent pulse wave generated by the value of the local period determined by the autocorrelation function of signal values over the previous period of time.

6 cl, 4 dwg