SU127359A1 - Ballistocardiograph - Google Patents

Description

Ballistocardiography is a method of studying the heart activity of a person based on recording and analyzing the mechanical movements of the human body caused by the work of the heart and the movement of blood through the vessels.

A known ballistocardiograph, which is a prefix to an electrocardiograph, contains an induction coil with a magnetic core, the displacement of which, depending on the movement of the subject's feet, associated with heartbeats, causes inductive voltage signals to the cardiograph. The disadvantage of the device is the displacement of the magnet inside the coil due to the movements of the legs of the test, which are caused by the springs of the foot rest, which distorts the ballistocardiogram.

The proposed ballistocardiograph eliminates these distortions.

The distinguishing feature of the ballistocardiograph is that it uses rollers as a support for the subject's legs, the roller with a magnet attached directly to the legs, and the induction coil is mounted on a tripod permanently.

To compensate for electromagnetic interference, the ballistocardiograph sensor is made symmetrical, and a push-pull circuit is used to convert the signals.

FIG. 1 shows an induction coil of a ballistocardiograph, permanently fixed on a tripod, side view; in fig. 2 No. 127359-2 same, top view; in fig. 3 - plank with a magnetic core, side view; in fig. 4 - the same, top view; in fig. Figures 5 and 6 show the rollers used as a footrest; in fig. 7 is an electrical device diagram.

The induction coil / (sensor) is permanently fixed. on tripod 2 by clamp 3 using knob 4. Plank 5 with magnet 6 is equipped with elastic belts 7 for heeling the test subject’s feet, which presets legs on rollers 8. Induction coil / has switch I allow us to send mixing signals to the cardiograph speeds V and acceleration a and the corresponding scale 10. The two-stroke electrical circuit of the device with a symmetrical sensor (Fig. 7) also has channels 5, Y and a for peristratsiiratsihih ballistocardiograms.

When working with the patient device is placed on a rigid stationary fixed table. Magnet 6, mounted on the subject's legs with the help of the bar 5 and rampy 7, is inserted into the channel // of the coil / mounted on the table. The subject's legs should rest on the rollers 8 so that the calves do not touch the table. As a result of the heartbeat, the magnet 6 oscillates and induces signals in coil 1, which are recorded by an electrocardiograph.

The proposed device was tested in the Clinical Hospital named after Okg Bryansk Revolution and in the Road Hospital No. 2 of the South-Western Railway. These hospitals note that the device presented allows for registering very small movements of the human body, resulting from heart activity, that it expands the possibilities of studying and diagnosing a whole range of cardiovascular diseases, and is convenient in operation.

Ballistocardiograph can be successfully used in clinics and research institutes.

Prevention Invention

Claims (2)

1. The ballistic cardiograph, which is an electrocardiograph pattern containing an induction coil with a magnetic core, which moves depending on the subject's movement of the heart related to the heartbeats, induces voltage signals to the cardiograph, characterized by In order to eliminate the distortions introduced when measuring, in it, as a stand, foot iodles rollers, a bar with a magnet is attached directly to the legs, and the induction coil is fixed on the back ve is stationary. 2. The ballistic cardiograph according to claim 1, characterized in that, in order to compensate for electromagnetic interference, the sensor in it is made symmetrical and a push-pull circuit is used to convert the signals.