METHOD AND DEVICE FOR CARRYING OUT HUMERUS OSTEOSYNTHESIS Russian patent published in 2001 - IPC

FIELD: medicine; medical engineering. SUBSTANCE: method involves placing an insert into external acoustic canal to form air-proof chamber with air pressure changeable under control. Acoustic signal is sent in continuous mode to measure mechanical tension in the tympanic membrane, described by its acoustic compliance that is measured twice. Value calculated from formula is the measure of intracranial pressure change during the time interval between two measurements, where ΔC_1,2 is the relative change of the tympanic membrane acoustic compliance during the time interval between the first and the second measurement. C₁(p10

), C₂(p20) are the tympanic membrane acoustic compliance values in the first and the second measurement, respectively. p10, p20, are the air pressure values in the middle ear in the first and the second measurement, respectively. The device has insert for making air-proof chamber in the external acoustic canal, acoustic probe placed in the insert, air pump varying air pressure in the air-tight chamber in controlled manner, acoustic tone emitter, measuring microphone, measurement unit and control unit. The control unit is connected to the unit for measuring air pressure in the middle ear cavity through a unit for storing data, unit for transforming data to the common pressure scale and unit for measuring determining relative change of the tympanic membrane acoustic compliance. The insert has flexible casing with a cavity to be filled with compressed air. EFFECT: accelerated noninvasive measurement method; low costs. 2 cl, 2 dwg