SU1461436A1 - Compression/distraction apparatus - Google Patents

Description

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

The aim of the invention is to ensure the uniformity of regenerate formation around the entire perimeter of the bone fracture by preventing tilting of the threaded rods while the patient is walking in the device.

FIG. 1 shows a compression-distraction apparatus, a horizontal projection; in fig. 2 - the same, axonometric projection; in fig. 3 - installation of the apparatus on the bone, the initial stage; in fig. 4 - the same, intermediate stage; in fig. 5 is the same, the step of attaching the movable bars to the ring; in fig. 6 is a diagram of the apparatus without a removable console.

The device contains rings 1 with spokes 2, connected by threaded rods 3. The device is equipped with a removable device that includes two pairs of rods 4, 5 and 6.7, which are installed at one end with fixing screws 8 on the spokes 2, and at the other end flax placed on a telescopically connected half ring 9 and arc 10, having the possibility of mutual movement along the arc of a circle within 170. Moreover, one pair of rods 4.5 is located at the ends of the half ring 9, and at the diametrically opposite ends of the arc 10 - another pair of rods 6.7. On the half-ring 9, a detachable ring 12 with an angular scale of 13 is mounted on racks 11,} ia of which movable strips 14 are placed

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with linear scales 15 and holes 16 for threaded rods 3. Movable strips 14 have the possibility of radial movement, rotation and fixation on the split ring 12 due to the presence of clamps 17 with clamping screws 18,19. To increase the contact area of the spokes 2 with the rods 4-7, the latter at the ends have thickening 20 with grooves 21 (Fig. 2). The rings 1 of the apparatus are provided with external strips 22. At the ends of the half-rings 9 and the arcs 10 there are tides 23 with locking screws 24 intended for connecting rods 4-7. Detachable rings 12-performed with a hinge 25 and a lock 26.

The device works as follows at once.

Under local or general anesthesia through the bone above or below the defect (for example, false joint, osteotomy area, performed previously), at least two pairs of mutually intersecting spokes 2 are made. Each pair is fixed with tension in ring 1 of the compression ring. - a straction apparatus, for example, an apparatus of Ilizarov or Kalnberz type, etc., as they were carried out, having ring 1 at approximately the same distance from the skin of the limb segment, along its entire perimeter. Then the split ring 12 is opened, releasing the lock 26, half-ring 9 and the arc 10 are folded together, retracted to the maximum position. The rods 4-7, movable slats 14 are positioned and the proposed device is placed in this position in the plane of the ring 1, close to it. Push the rods 4-7 in the radial direction until the thickening of the 20 rods 4.5 mounted on the half-ring 9 is located between the skin of the limb and the inner diameter of the ring 1 (arc 10 and the rods 6.7 can be located arbitrarily), after which they put the rods 4.5 with grooves 21 on one of the spokes 2 and fix them in this position with the fixing screws 8 (Fig. 3). Then the arc 10 is moved. Relative to the half ring 9 until the rods 6 and 7 start to run parallel to the second spoke 2 (Fig. 4), and due to the mobility of the rods 4 and 5, the arc 10 moves to

until the rods 6.7 are in alignment with the second needle 2, and are fixed to it like rods 4.5. 5 As a result, the semi-ring 9. And the arc 10 will be located on a circle with the center at the point of intersection of the spokes 2 in the bone (Fig. 4). In this position, the rods 4 and -5 are fixed in tides 0 by locking screws 5, after which the device is integral with the ring 1 of the distraction-compression apparatus. A split ring 12 is then connected, a closure lock 26, 5 which also becomes a concentric circle formed by a half ring 9 and an arc 10. The clamping screws 18 and 19 are released on one of the clamps 17 opposite to

0 is a section of ring 1 that is as far as possible from the center of the found circle, preferably opposite one of the holes on it. Combine the hole 16 at the end of the movable bar with from-5 version 22 in the ring 1 of the apparatus, thread the rod 3 through them and fix it with nuts to the ring 1. Note the position of the movable bar 14 relative to the clamp 17

0 on a linear scale 15 position. clamps 17 on the angular scale 13. The remaining movable strips 16 (their number should correspond to the number of threaded rods 3 required

5 for fixing the rings 1) are positioned on the angular scale 13 at regular intervals, and the sliding bars 14 of each of the clamps 17 are set in the same position as

0 and first, focus on the readings of the linear scales 15 (Fig. 5.6). As a result, the holes 16 at the central ends of the movable bars 14 indicate the required positions of the remaining threaded rods, which are guided through these holes 16 and temporarily fixed to the bars with nuts. They are then connected to the ring 1 by means of Additional strips 22, which are attached to

Q ring 1 in such a way as to fix its threaded rods 3 in the position found. Then, the rods 4-7 are released from fixation to the spokes 2 and the rod 3 in the opposite order to

g overlay. Similarly, the position of the ends of the rods 2 relative to the second ring 1 is found and fixed to the second ring 1, thus ending the installation of the apparatus.

By placing the threaded rods of the distraction-compression apparatus at equal intervals and at equal distances from the center of the circle, with the center in the bone, the shoulders of the loads on each of the rods are leveled, as a result of which the distortion of the rings of the apparatus is eliminated. This allows treatment of patients by free walking of patients in the apparatus, which significantly reduces the labor intensity and cost of treatment, eliminates the need to use external loading drives, and makes it possible to simultaneously treat large numbers of patients (for example, in military field conditions).

The design of the device for mounting the apparatus provides a quick and accurate finding of the location of the threaded rods relative to the bone of the limb and the distraction-compress 61436 rings. 6

device, and the possibility of temporary fixation of the rods to the device speeds up the process of imposing the device. This device can either be mounted with a distraction-compression device initially, or it can be re-mounted during treatment with a conventional Ilizarov-type device, 10 if the fact of a delayed rearrangement of the distraction bone regenerate is established.

The preliminary reinforcement of the spokes in the ring of the usual distraction-complexcJHOHHoro apparatus simplifies or leaves unchanged the duration of surgery for transosseous osteosynthesis, which does not create additional stress on the patient's body, does not lengthen the anesthesia time, since all subsequent manipulations are carried out after complete the operation.

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Claims (1)

COMPRESSION AND DISTRACTION APPARATUS containing rings with knitting needles connected with threaded rods, characterized in that, in order to ensure uniformity of regenerate formation along the entire perimeter of the bone fracture by preventing the threaded rods from skewing while the patient is walking in the apparatus, the apparatus is equipped with a removable attachment comprising two pairs of rods installed by one end with the help of fixing screws on the knitting needles, and by the other ends pairwise placed in the radial direction with the possibility of movement at diametrically opposite ends along ukoltsa arc and telescopically interconnected for semiring via struts installed releasable ring with an angular scale which has movable strap with linear scales and orienting holes for the threaded rods.