SPHYGMIC ACTIVITY METRE Russian patent published in 2010 - IPC A61B5/22 H04R1/46 G01L9/06 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to cardiologic diagnostic devices and represents a sphygmic activity metre. The metre comprises a pilot converter in the form of a hollow box that accommodates a balance arm attached on its inside cap on a feathering hinge. The first and second MEMS accelerometres are fixed on the ends of the balance arms. A bottom of the box has two apertures, one of which is covered with an elastic membrane with a metallised inner side with the first MEMS accelerometre attached to its centre. An annular electret with a metallised upper plane is rigidly fixed in the box above the elastic membrane. The second aperture covers a pressure sensor. An output of the first MEMS accelerometre is connected to a true input of a differential amplifier. An output of the second MEMS accelerometre is connected to a complemented input of the differential amplifier. An output of the differential amplifier is connected with an input of an integrator. The metallised inner side of the elastic membrane and the metallised upper plane of the electret are connected with inputs of a voltage amplifier. The output of the differential amplifier is an output of an acceleration sphygmogram of the sphygmic activity metre. An output of the integrator is an output of a speed sphygmogram of the sphygmic activity metre. An output of the voltage amplifier is an output of a travel sphygmogram of the sphygmic activity metre. An output of the pressure sensor is an output of pulse wave pressure of the sphygmic activity metre.

EFFECT: use of the invention enhances the metre and allows to use the same metre for describing various characteristics of sphygmic activity and their phase relations.

2 cl, 2 dwg