SU1049052A1 - Apparatus for removing metal parts in case of osteosynthesis - Google Patents

Abstract

A DEVICE FOR REMOVAL OF METAL ELEMENTS IN OSTEOSYNTHESIS, containing mtoK with a flange, a gripper connected to the rod, a drummer mounted on the rod coaxially with the possibility of reciprocating mixing, characterized by the fact and the safety of the surgeon’s work, it is equipped with a housing with a hinged-lever lever, which is located in the groove of the firing pin and has on its short shoulder a folding spring-loaded pawl connected to the drummer using mounted in the guide groove of the rod, wherein the lever is connected to the housing by means of an axis eccentrically mounted in the hinge, the device is also provided with springs mounted in the housing for interacting with the hammer.

Description

four:

WITH

JV The invention relates to medicine, namely to traumatology. A device is known for extracting metal elements during osteosynthesis, which comprises a handle, a mechanism for creating oscillations in the form of an electromagnetic vibrator, and a gripper formed by a frame with a two-link lever and a vibrator core 1. The drawbacks of operating with electric current are small; the size of the device is sufficient effort to extract the metal elements of the osteosynthesis. It is also known a device for removing metal elements during osteosynthesis, containing a stem with a flange, a gripper connected to the stem, and a drummer mounted on the rod coaxially with the possibility of reciprocating movement 2. However, the device is inconvenient in operation, since it requires simultaneous holding hand and striking the other and maintaining coaxiality of the stem and the element to be removed, which can lead to trauma to the bone tissue. In addition, its use is associated with the danger of tra. The surgeon’s aim is to reduce bone trauma, improve the convenience and safety of the surgeon. The goal is achieved by the device for removing metal elements during osteosynthesis, containing flange brushes, gripper connected to the stem, drummer, mounted on the rod coaxially with the possibility of reciprocating movement; A short shoulder folding spring-loaded pawl connected to the drummer with a driver mounted in the stem guide groove, while the lever is connected to the body with an axis eccentrically mounted in the hinge, the device is also equipped with springs mounted in the housing for interacting with the drummer. FIG. 1 shows the device, a general view; in fig. 2 is a section A-A in FIG. I; in fig. 3 is a diagram of the change in the amount of compression of the working springs. The device {FIG. I and 2) comprises a housing 1, consisting of two parts connected by a thread, and ending with a support lug 2 and tides 3. In case 1, the rod 4 is movably mounted with a flange 5. Spring 6 with a threaded sleeve 7 with a washer 8 and a restricting pin 9 located in the groove 10 of the housing 1, provide 1 2 the creation of a working gap between the flange 5 of the rod 4 and the gasket 11. On the rod 4 we have a drummer 12, constantly pressed against the flange 5 of the rod 4 by three working springs 13 with our fingers 14 and 15 , To the body 1 by means of the axis 16 the double-arm lever 17, of lengths, is hingedly attached whose shoulder 18 is made in the form of a handle. On its short shoulder 19 on the axis 20, there is a folding dog 21, which is constantly pressed by spring 22 to step 23. Spring 24 serves to return the two shoulders lever 17 after its working rotation to the extreme position before the uro in restrictive pin 25. Short shoulder 19 together with the folding dog 21 is located in the groove 26 of the striker 12 (Fig. 2), where it contacts with the leads 27 fixed in it, which enter into the guide grooves 28 of the rod 4. The two-arm lever axis 16 is installed in the eccentric 29 with the handle 30 rotatable in the tides of the hull 1 In this case, a grip of one type or another is attached to the threaded shank 32 protruding from the body in relation to the metal osteosynthesis element to be removed. FIG. 1 shows, for example, a hook-shaped gripper 33 for removing the intra-bone pin 34. The device operates as follows. In the initial position, the hammer 12 is pressed by the working springs 13 to the flange 5 and through the gasket And to the body I. The double-shouldered lever 17 by the spring 24 is pressed to its outermost position. the initial position, and folding dog 21 is in contact with the leads 27 (Fig. 1). Covering with fingers the support lug 22 of the housing 1 and the long arm 18 of the double-arm lever 17, the surgeon squeezes them, turning the double-arm lever 17 around the axis 16. At the same time, the folding dog 21 moves the hammer 12 over the rod 4, compressing the working springs 13. And at the beginning of the movement of the drummer The 12 stem 4 under the action of the spring 6 performs a slight axial movement relative to the housing I within the groove 0 under the pin 9, thereby creating a guaranteed clearance between the flange 5 of the stem 4 and the gasket 11. At the end of the turn of the two shoulders lever 17 (Fig. 1). shown hornpunk By straight lines, the folding dog 21 comes off the leads 27 and the drummer 12 under the action of the working springs 13 performs its working return movement on the rod 4, the impact at the end of movement on the flange 5 and transferring the force, impact through the rod 4 and the grip 33 to the extracted intraosseous rod 34. After the surgeon's fingers are released, the two shoulders lever 17 returns to its original position under the action of the spring 24, and the folding dog 21, turning under the action of the spring 22 around the axis 20, again jumps over the leashes 27. On subsequent turns, the cycle of operation repeats. Until a complete recovery intraosseous pin 3.4 of the medullary canal.

The magnitude of the impact on the flange 5 of the rod 4 of the striker 12 is determined by the sharpness of its cocking, as well as the compressing force of the working springs 13, which are controlled by the amount of their compression, which can change from the starting point Oo .. by turning the handle 30 of the eccentric 29. (Fig. 3) . At the same time, the size of the short arm 19 of the two shoulders lever 17 changes and the folding dog 21 is removed or approaches the leads 27 of the impactor 12. With the minimum compression Hi of the working springs 13, the axis 16 of the double arm 17 is at the point Oj and with the R radius of the folding dog , jumps off leashes 27 at point a. When turning the eccentric 29 to its extreme position, the axis-16 is located at the point Oi ,. and the folding off of the folding dog 21 occurs at the point as .. at the maximum hectare bt of the working springs. 13. Changing the magnitude of the Lg-hi compression is carried out continuously during operation of the device by turning the handle 30. with your thumb. Using the proposed device, thanks to the kinematic scheme adopted in it, will increase the safety of the surgeon’s work by placing the Darnik in the hull, increasing the convenience of work. The hook, like arming and dropping the drummer, will be realized by the force of one hand, which will allow the surgeon with the other hand to hold the body the coaxiality of the device and the element to be removed, which, in turn, will reduce the likelihood of injury to the bone tissue.

18

33

/ 3

31 ge

 J

FIG.

Claims (1)

DEVICE FOR REMOVING METAL ELEMENTS IN OSTEOSYNTHESIS, comprising a rod with a flange, a grip connected to the rod, impact -. nickname mounted on the stem coaxially with the possibility of reciprocating movement, characterized in that "in order to reduce trauma to bone tissue, increase the convenience and safety of the surgeon, it is equipped with a housing with a pivotally mounted double arm located in the groove drummer and has on its short shoulder a hinged spring-loaded dog connected to the drummer with a leash. installed in the guide groove of the rod, while * the lever is connected to the body with the help of an eccentrically installed 'in the hinge axis, the device is also provided with springs, installed in the housing for interaction with the hammer.