SU1255117A1 - Distraction apparatus - Google Patents

Description

to

11255117

The invention relates to medical technology, namely to traumatology and orthopedics.

The purpose of the invention is to simplify the apparatus.

Figure 1 shows the apparatus, a general view; Fig. 2 is a kinematic diagram of a drive device.

The distraction apparatus (Fig. 1) contains fixed and movable annular supports 1 and 2 with the spokes 3 and spokes 4. The spokes 4 of the fixed annular support 1 are passed through the proximal fragments 5, bones, and the spokes 4 of the movable annular support 2 - through distal fragment 6. (another option is possible to install annular supports: the spokes 4 of the movable support 2 are drawn through the proximal fragment 5, and the spokes 4 of the fixed support 1 through the distal fragment b). Both annular supports 1 and 2 are connected with threaded rods 7. In the

The fastener 3 is fixed. The ring supports 1 and 2 are connected by tension rods 7 with a compression spring 8 attached to each of them and an adjusting nut 9. The stationary support 1 is rigidly fixed to the threaded rods 7. The drive device 10 is mounted on fixed support 1. The free end of the cable 11 is connected to the movable support 2. Then, by turning the adjusting nuts 9, the necessary preliminary tension of the compression springs 8 is produced. In this case, the tension cable 11 prevents the movement of the movable support 2. When the switch 20 is closed, the electromagnet 17 is connected to the output of the generator 19 of electric pulses. Starting from this

20 points electric pulses of the generator 19 periodically arrive at the electromagnet 17. With each actuation of the electromagnet 17 measles

pulls off the anchor 15. At the end of FIG. In the first embodiment, on each of the threads of the electric pulse, the bark 18, under the coil rods 7, between the annular action of the spring 16 returns to the supports 1 and 2, the helical initial position is established. As a result, the anchor wheel 14 is advanced onto the single tooth. The movement of the anchor wheel 14

compression spring 8 with an adjusting nut 9. On one of the ring supports,

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For example, the fixed support 1 (Fig. 1), the gearbox 13 is transmitted to a drive device 10 with a cable 11 that is rigidly mounted.

The drive device 10 (Fig. 2) comprises a brake drum 12, a gearbox 13, an anchor wheel 14 with an anchor 15 constituting a ratchet mechanism, a spring 16 and an electromagnet 17. One end of a cable 11 of a drive device 10 is wound on a brake drum

12 and secured to it, and the second (free) end of the cable 11 is connected to an opposite annular support, for example a movable support 2 (FIG. 1). Brake drum 12 through reducer

13 is connected in series with the anchor wheel 14. The anchor 15 is connected to the core 18 of the electromagnet 17 and the spring 16. The electric pulse generator 1.9 is connected via a switch 20 to an electromagnet 17.

The distribution distraction unit is mounted and operates in the automatic pulsed micro-distraction mode as follows.

The rotary drum 12. As a result of this, the tension of the cable 11 is reduced, and under the action of the pre-tensioned compression springs 8, the moving annular support 2 is moved together with the distal fragment 6 of the ball.

The rate of distraction is determined by the frequency of the electric pulse generator 19, which can be varied by known electrical means. The required rate of distraction (the frequency of the generator is determined depending on the clinical and radiological data, ranging from

10s to 1.5 minutes After reaching the required lengthening of the limb, the movable support 2 is rigidly fixed

on the threaded rods x 7 and the drive unit 10 with a cable

11 deleted.

The technical and economic efficiency of the proposed device is determined by simplifying its design.

(instead of the three transfer mechanisms, 55 MOE, as in the known device, pre-stressed springs are used), reducing the weight and dimensions, which ensures less

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During the operation, through the proximal 5 and distal 6 bone fragments cross-spoke the spokes 4, which are tensioned and

are secured in the cutter 3. The ring supports 1 and 2 are connected by tension rods 7 with a compression spring 8 attached to each of them and an adjusting nut 9. The stationary support 1 is rigidly fixed to the threaded rods 7. The drive device 10 is mounted on fixed support 1. The free end of the cable 11 is connected to the movable support 2. Then, by turning the adjusting nuts 9, the necessary preliminary tension of the compression springs 8 is produced. In this case, the tensioned cable 11 impedes the movement of the movable support 2. When the switch 20 is closed, the electromagnet 17 is connected to the output of the generator 19 of electrical pulses. Starting from this

torque electric pulses of the generator 19 periodically arrive at the electromagnet 17. With each actuation of the electromagnet 17 measles 18

P® reducer 13 is transmitted by torus

The rotary drum 12. As a result of this, the tension of the cable 11 is reduced, and under the action of the pre-tensioned compression springs 8, the moving annular support 2 is moved together with the distal fragment 6 of the ball.

The rate of distraction is determined by the frequency of the electric pulse generator 19, which can be varied by known electrical means. The required rate of distraction (the frequency of the generator is determined depending on the clinical and radiological data, ranging from

10s to 1.5 minutes After reaching the required lengthening of the limb, the movable support 2 is rigidly fixed

on the threaded rods x 7 and the drive unit 10 with a cable

11 deleted.

The technical and economic efficiency of the proposed device is determined by simplifying its design.

(instead of the three transfer mechanisms, as in the known device, pre-stressed springs are used), reducing the weight and dimensions, which ensures less

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fatigue of a patient's limb and using the device not only for convenience when developing movements in the lower j but also on the upper final joints. In addition, it allows tx.

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Compiled by L.Povarov Editor S.Patrusheva Tehred L. Serdyukov a Proofreader I. Muska

Have

Order 4737/3 Circulation 660 Subscription

VNISHI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

fig 2

Claims (1)

A DISTRACTION DEVICE containing movable and fixed ring supports with knitting needles and spoke holders connected by threaded rods, as well as a drive device including a ratchet mechanism, whose anchor is electromagnetically coupled to an armature installed in an induction coil connected by electrical connection to an electric pulse generator, moreover, the ratchet wheel is mounted on the input shaft of the gearbox, characterized in that, in order to simplify the apparatus, the drive device is mounted on a stationary a support on the output shaft gear mounted brake drum with rope connected to the movable support on threaded rods mounted compression springs, one ends thereof are fixed on threaded rods, and the other contact to the movable support.