JPS6122972B2 - - Google Patents

Abstract

External orthopedic fixing apparatus comprises a pair of hexagonal collars (1, 2) connected parallel to each other by means of a pair of adjustable spacers (3) each extending normal to the planes of the collars and connected to opposite sides of each collar; each collar being further provided (in the sides thereof not connected to the adjustable spacing members) with apertures (4) extending transversely of the collar for mounting fixing rods (8) extending between opposite faces of the collar. In one embodiment (as illustrated) the adjustable spacing members take the form of a male member (9) slideable in a longitudinal aperture in a female member (8) each demountably connected, via screw thread rods (6) and nuts (7), to the collars. In another embodiment, the adjustable spacing means take the form of rotatable screw threaded rods connected to one collar and passing through a thread hole in the other collar. <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to medical science, particularly orthopedics and trauma therapy.

The concept of external fixation devices and their applications are widely known. For example, in 1942 in the United States, Haynes designed his own square splint, which consisted of four screw pins that were introduced into the bone. In 1970, the Montpollier school in France was not satisfied with the degree of fixation provided by these devices and created a double square fixation device, which later led to circular or semicircular fixation devices in 1980. Research on external fixation devices began at a research institute in Kergan, Siberia, Soviet Union. Dr. Grabiel Ilizarov devised a device consisting of two integrally formed hoop members with four cylindrical shafts with worm screws, in which a pair of crossed wires in each segment were inserted into the bone. pierced through the longitudinal axis. Also in the Soviet Union, Dr. Volkov and Dr. Oganesian actually used their device, which consisted of two intersecting shortening devices with four half-loops connected by a cylindrical shaft. It consists of two horizontal bars made of two cylindrical bars (cylinders) with internal screws.

The above-mentioned Gabriel Ilizarov prototype is the closest to the present invention. However, Dr. Ilizarov's external fixation device is not easy to use since the surgeon requires the assistance of a few assistants when applying it. This device requires at least three loop members and thus some wires are used to attach it to the bone, and its tightening requires winding of the wires, so these wires cannot be used with other fixation devices. becomes useless. Its handling is complex, requiring the use of wrenches on various nuts, which can be dangerous if the member is being stretched, and requires a quarter turn every six hours, requiring most of the attendants. Since the adjustments are made by relatives, it is unsafe for both the patient and the relatives attending, and it is painful for the patient, and if the adjustment is not carried out correctly, it may cause an irreversible accident. Additionally, a three-loop device takes up much more space and is heavier.

The present invention has been made to eliminate this drawback, and its purpose is to cure many medical conditions with one device, to reduce installation time on the patient by half, and to make it easy to assemble in any orthopedic surgery. The object of the present invention is to obtain such an orthopedic fixation device.

The features and advantages of the present invention are as follows.

B. Diaphyseal fracture, pseudoarthrosis,
Conditions such as elongation or shortening of cut ends, etc. can be cured without any modification.

(b) The time required to wear the device of the present invention is much less than half the time required to wear Dr. Ilizarov's device and others.

C. This device can be left assembled in advance, so it can be easily placed in any orthopedic surgery.

D. Handling of this device is easy and safe for patients and their relatives, and the device is equipped with a scale with cm graduations, and two scale wing nuts ensure correct operation of the device by manual operation.

The device of the present invention consists of two sliders connected by two sliders.
It is a device formed by two hexagonal bony plates, upper and lower. Each side adjacent to each hexagonal slider is provided with four narrow cuts and fixedly provided with two guides inserted into two holes in the end of each slider. Between these guides there is a hole for a threaded rod, and the threaded rods protrude from both the upper and lower ends of the slider, and each has a nut, so that when the nuts are turned, the hexagonal flat plate moves away from or approaches the slider. It is configured.

The external fixation device for fingers consists of two hexagonal flat plates connected by two sliders in the form of connecting threaded rods, and three holes on each side adjacent to the connecting threaded rods of the upper and lower plates. The holes are adapted to receive the threaded rods and are open at different levels to prevent the threaded rods from coming into contact with each other. Furthermore, there are 2 at the vertices of the hexagon.
Two holes are provided to allow rods to pass diagonally in the case of unstable fractures. The connecting threaded rod has a nut, and when turned clockwise, the hexagonal plates move apart, and when turned in the opposite direction, the hexagonal plates move toward each other.

Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

In Fig. 1, this device consists of an upper piece 2 and a lower piece 1 of two hexagonal bone-shaped flat plates connected by two sliders 3, and two hexagonal side surfaces to which the sliders connect. Four thin cuts 4 with a length of 5 cm and a height of 0.3 cm are formed on the other four sides, and each slider 3 is fixed on the corresponding side of the hexagon and is located at the top and bottom ends of the slider. The coupling by the slider is performed by two guides 5 passed through the two insertion holes. A hole is formed on the same side of this hexagon and between the guides, through which a screw 6 extends so as to protrude from both ends of the slider, and when the nut 7 is turned, the hexagonal piece is brought closer to the slider. Or separate them.

Each slider 3 consists of two parts, a male part 9 and a female part 10. The male part travels through a dovetail groove, and both parts are connected to a semicircular part 11 at the base of the female part 10.
2 of the small rectangular part 12 fixed to the end of the male part.
It is connected by two element members. These two element members are fixed on the semicircular part 11 and the male part 9
It is connected to the upper wing nut 14, and when the nut 14 is turned to the right, the slider 3 is closed, and the slider is connected at the same time to the hexagonal piece at its end, and when the two are brought together, and the nut is turned in the opposite direction, the slider 3 is closed. The sliders are pulled apart and the hexagonal pieces are pulled apart by these sliders. The so-called female part 1 of this slider 3
0 has a scale with graduations down to 11cm.
The maximum opening depth of the slider 3 is shown.

The purpose of the thin cut holes 4 formed in pairs on the front sides of each hexagon is to have heights different by 3.5 mm so that the threaded rods 8 cannot come into contact with each other when penetrating the bone.
This provides good attachment to the bone.

The dimensions of the slot 5 of 5 cm long and 0.3 cm wide also provide support and guidance for the threaded rod and different angles facing the bone, allowing movement of the rod once the bone is fixed with the rod. The running-in rod is threaded and acts as a male part of the screw that penetrates the bone at low rotational speeds and provides a rigid fixation. The threaded rod passes through each hexagonal piece at an angle determined by the wound (in the case of displaced fractures), at an angle of 60° in the case of pseudoarthrosis without elongation or displacement, and protrudes through the small incision 4. Nuts make it easy to fully tighten the threaded rod 8, and these nuts ensure the fixity of the threaded rod. This ensures the immobility of the rod. Lateral movement of the bone can be compensated for by loosening one end of the rod 8 and tightening the nut at the other end, pulling the end of the bone towards this side; each hexagonal piece has four ends, so each A wide range of movement for each slot in the hexagonal piece allows correction of movement in four directions.

If it is necessary to pass a rod through it, up to 6 rods can be used.

Some patients have unstable fractures or third fragments;
Or, in view of the fact that it is necessary to lower the corticotomi´a and cure pseudoarthrosis with bone loss, two holes are formed in the angle part of the hexagon that extend to the opposite ends of the other hexagon, and the rod is diagonally The rod is made easier to pass through in a crosswise manner, and the rod is tensioned by a wing nut or by forming a spigot at one end for rotating the nut.

Both crossbars must be removed to allow the slider to move.

For patients with shortening, the external fixation device is closed and assembled. That is, by fully connecting the hexagonal pieces to the slides and closing them, the patient can handle the device as follows. Make 1/4 turn every 6 hours with nut 7. This nut is provided with a slit to avoid patient error, which also allows precise control of the resulting elongation.

In the case of pseudoarthrosis, the device is left open according to the surgeon's criteria for the compression necessary to create induration of the bone.

In the case of a new fracture with superposition of fractures, the device is kept closed, the superposition is calculated in cm on the X-ray, and both sliders 3 are adjusted to 0.5 of the superposition.
cm upward, then correct the lateral movement using the threaded rod as described above, and once each epiphysis is in front, slider 3 is closed until the desired compression is achieved, and the patient is I was able to walk the next day.

Next, the external fixation device for fingers is 2 as shown in Figure 4.
It has two hexagonal upper pieces 17 and a lower hexagonal piece 16, each having three holes 18 on each side, and a threaded rod 19.
These holes are placed at different levels (1 mm) so that the threaded rods do not touch each other. Two holes 20 are formed at the apex of each hexagon to allow threaded rods to pass diagonally in the case of unstable fractures. Both hexagons are connected by two sliders 21 by a threaded rod 22 that is rotated by a nut 23, and when the nut is rotated to the right, the hexagons are separated, and when the nut is rotated to the left, the hexagons are brought closer together.

The application implementation of this finger device is the same as that of the orthopedic external fixation device described above.

The external fixation device of the present invention has been utilized for the following medical conditions:

Pseudoarthrosis (femur, tibia, epiradius) (epiphyseal detachment, corticotomi´a) Fracture (femur, tibia, anterior radius) The results showed that treatment of pseudoarthrosis without bandage surgery reduced 70% of the cases. exceeds 100% for extension and fracture.

External fixation devices for fingers have been used for pathologies such as elongation of amputated ends, open or closed fractures of phalanges, and congenital deformities of fingers.

The orthopedic external fixation device of the present invention exhibits great economic efficiency in hospital management because it minimizes hospital stays, medicated plaster dressings, and the use of artificial bone in cases such as fractures and pseudoarthrosis. Finally, the device accelerates patient recovery.

[Brief explanation of the drawing]

Figure 1 is an isometric drawing of the external fixation device;
2 shows a front and side view of the slider, FIG. 3 shows a top and side view of the hexagonal plate of bone, and FIG. 4 shows an external fixation device for a finger. 1: Hexagonal flat plate bottom piece; 2: Hexagonal flat plate top piece;
3: Slider; 4: Thin cut; 5: Guide; 6:
Screw pin; 7: Wing nut; 8: Rod; 9: Male part;
10: Female part; 11: Semicircular part; 12: Square part; 13: Screw pin; 14: Wing nut.

Claims (1)

[Claims] 1. Two bone-like hexagonal flat plates, an upper piece 2 and a lower piece 1.
Each hexagon is provided with four thin cuts 4 located on adjacent sides of the slider, and each hexagon is fixed in two holes at each end of the slider. Two guides 5 passing through this are provided, and between the guides a hole is formed through which a threaded pin 6 having a wing nut extends outwardly from each end of the slider, and when the wing nut is turned, a hexagonal shape is formed. An external fixation orthopedic device that can move the segment toward and away from the slider. 2 In the device according to claim 1, the thin cut opening 4 formed with a hexagonal hole has a length of 5 cm and a height of 0.3 cm, which is similar to dislocation after fixing the bone with a rod. A device characterized in that different angles facing the bone can be obtained. 3. A device according to claim 1, in which the slider consists of two parts, a male part 9 and a female part 10 passing through a dovetail cut, the male and female parts being at the base of the two elements, namely the female part. semicircular part 1
1 and a square part 12 fixed to the end of the male part, which part is joined by a threaded pin 13 fixed to the semicircular part and the square part, which threaded pin also has a wing nut 14, which A device characterized by opening or closing a slider depending on the direction of rotation. 4. A device according to claim 3, which is provided with a screw pin 6 fixed at the end of the slider and actuated by a wing nut 7, for longitudinally moving the bony hexagonal plate away from or approaching the slider. A device characterized by: 5. Device according to claim 3, characterized in that the female part 10 of the slider 3 and the slider have a graduated scale. 6. A device according to claim 1, in which the upper piece 2 and the lower piece 1 of the bony hexagonal plate have two holes at each apex of the hexagon, by means of which the rod 8 is fed in an oblique direction. A device characterized by making it possible. 7. Device according to claim 1, characterized in that the narrow cuts 4, which are located directly opposite each other in a paired configuration, are hexagonal and have a height difference of 3.5 mm. 8 External fixation device for fingers, consisting of two hexagonal upper parts 16 and lower parts 17, each side of each hexagon having to pass through a threaded rod 19.
There are two holes 18, the distance between the holes is 1 mm,
Each hexagonal vertex has 2 holes for passing a rod diagonally through it.
There are two holes 20, both hexagonal pieces are joined by two sliders 21 by a threaded rod 22, which rotates with a wing nut 23, and when the wing nut rotates to the right, it opens the hexagon to the left. A device characterized in that when rotated, the hexagons approach each other.