PNEUMATIC SENSOR FOR CONTINUOUS NON-INVASIVE MEASUREMENT OF ARTERIAL PRESSURE Russian patent published in 2017 - IPC A61B5/225 

FIELD: medicine.

SUBSTANCE: sensor for continuous arterial pressure measurement comprises an applicator (1), a working chamber (11) with a pressure sensor (20) connected via an A/D converter (321) to a microcontroller (32) that is connected to an air pump (40, 42) and a data display and processing device (33). The working chamber is made in the form of a cavity (12) formed in the body of the applicator, which is connected to the pressure sensor and via an adjusting choke (45) to a high-pressure chamber (44) connected to an air pump. The applicator has a contact area for interaction with the controlled zone of the artery. A hole (14) is formed in the center of the contact area, connected by a through channel (15) with the working chamber cavity, which is open to the flat surface of the contact pad with a possibility of free air flow in the controlled zone of the artery. Inlet openings (16) of the through air vent channels (161) are arranged around the hole to maintain pressure in the working chamber equal to the pressure on the flat surface of the contact pad on the side of the skin and tissues above the unloaded wall of the artery.

EFFECT: increased reliability due to air pressure formation in the working chamber equal to the blood pressure in the artery, transmitted from the skin and tissues above the unloaded wall of the artery to the flat surface of the applicator.

4 cl, 4 dwg