SU19306A1 - Instrument for evoking and measuring tendon reflexes - Google Patents

Description

To induce the knee-jerk reflex, they usually use a hammer that is hit on the knee tendon and this causes a reflex contraction. The data obtained by this method of investigation is not accurate, since in this case everything depends on the subjective assessment and the impact force. The proposed device aims to eliminate these disadvantages, causing, imperceptibly dL of the patient, a blow of a certain force on the knee tendon and objectively measuring the value of the resulting reflex. In FIG. 1 shows a side view of the drummer of the device; FIG. 2 - its top view; FIG. 3 view from the back; FIG. 4, 5 and 6 types of the instrument gauge in three projections; FIG. 7 is a front view of a tripod for mounting the hammer and will measure the “L; FIG. 8-type tripod top. The proposed device consists of a tripod (Fig. 7 and 8), on the rod A of which two are put on. individual instruments — a drummer and a meter. The drummer (Figs. 1, 2, and 3) consists of a polo copper tube B, inside which a round rod 6 moves from the head, other .. On the rod O there are three notches and, if. it can be pulled by the button, then it can be installed in three different positions to pull punches of different force on the muscle of the knee cup. Stopping during charging is achieved by lowering in one of the notches the end F of the lever G bent under the right angle of the short arm. To discharge (strike) the other end of the long shoulder, press the end of the wire passing through the flexible (rubber) tube D ; under pressure, the curved end f of the lever is raised and the released rod C slides under the influence of the coil spring but the tube and with the head strikes a round, slightly curved and fucked speech. ZINA plate-A and the latter strikes the leg; in this case, thanks to two coil springs K, which are deflected by the back of the shock plate, the blow is jerky (with recoil). The meter (Fig. 4) consists of a plate Z with a bow M with divisions; on the axis located on the plate Z, the sector O rotates with the teeth and gear, to which the arrow is attached. From the sector there is a long length lock, P, the free end of which is attached to the leg. When the foot is lifted, the end of the rod P and se- / Ktor O, rotates, rotates the gear with the arrow, and the latter pushes the other arrow remaining after the wheel: the dog is in place and marks the maximum rotation or rise of the leg.

Both parts of the device are installed in any position on a tripod by means of two small wings and a lock nut in the form of a ring;

Subject Patent a.

1. Instrument for evoking and measuring tendon reflexes, differing

; Using a hollow tube rod with three notches to set it in different positions, due to the lowering of the short lever arm in them.

2. The form of implementation of the device indicated in Clause 1, characterized in that a wire is passed through the additional rubber tube for pressing the long end of the lever, drawing the rod forward and heading it over the plate.

3. Form of execution of the aforesaid in pp. the device, which is distinguished by the use of a reflex meter, consisting of a strip of rubber with a sector mounted on it with a gear transmission on the arrow, sliding along the arc with divisions.

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