CN111839703A - A locking sleeve and fracture reduction tool set - Google Patents

Abstract

The invention provides a locking sleeve, and relates to the technical field of medical instruments. The locking sleeve comprises a first pipe barrel and a second pipe barrel which are coaxially connected, and a locking external thread is arranged at the proximal end of the first pipe barrel; the locking external thread has an outer diameter larger than the outer diameter of the second barrel. According to the locking sleeve, after the second tube barrel penetrates through the locking steel plate outside the body and abuts against the locking steel plate inside the body, the locking sleeve, the locking steel plate outside the body and the locking steel plate inside the body can form a stable connecting structure through the locking external threads, the relative positions of the two locking steel plates are prevented from being repeatedly fixed for many times, and the operation efficiency and the operation success rate are improved. On the basis, the invention also provides a fracture reduction tool set.

Description

A locking sleeve and fracture reduction tool set

technical field

The invention relates to the technical field of medical devices, in particular to a locking sleeve and a fracture reduction tool set.

Background technique

At present, the commonly used tools include two locking plates and a plurality of corresponding screw sleeves when performing fracture reduction operations of the fibula, radius, femur, etc. clinically. The locking plate is provided with a plurality of positioning screw holes connected with the screw sleeves. During the operation, the first locking plate is placed against the surface of the bone, and the second locking plate is placed parallel to the first locking plate outside the skin. Then, install the screw sleeves on the positioning screw holes of the two locking steel plates at the same time. Since the corresponding screw sleeves on the two locking plates are coaxial, the K-wire positioning guide can be used to find suitable multiple drilling positions in the bone.

However, since the two locking plates are placed on the surface of the bone and the skin of the human body, the two do not have a reliable connection structure, which may easily cause the dislocation of the upper and lower locking plates during the operation. hole location.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a locking sleeve and a fracture reduction tool set, which are helpful to solve the above technical problems.

The present invention is realized in this way:

A locking sleeve, comprising a first tube and a second tube, the first tube and the second tube are coaxially connected, and the proximal end of the first tube is provided with a locking external thread; The outer diameter of the locking external thread is larger than the outer diameter of the second barrel.

The working principle of the above locking sleeve is:

First, the outer diameter of the locking external thread is larger than the outer diameter of the second barrel, so the second barrel can pass through the positioning screw holes on the locking plate placed on the skin surface and extend toward the bone surface.

Secondly, since the first barrel and the second barrel are coaxially connected, the locking external thread is provided on the first barrel. After the locking external thread is engaged with the positioning screw hole, and the second tube is inserted into the locking hole on the locking plate placed on the bone surface, the position of the bone to be drilled by the K-wire is determined.

Finally, use other screw sleeves connected to the two locking steel plates to locate another position to be drilled to ensure accurate positioning.

Further, the locking external thread is a tapered thread, and the outer diameter of the proximal end of the locking external thread is smaller than the outer diameter of the distal end thereof. The technical effect is as follows: in addition to having better sealing performance, the tapered thread is also beneficial for screwing and drilling, and is convenient for screwing in surgical operations.

Further, the outer diameter of the proximal end of the locking male thread is equal to the outer diameter of the second barrel. The technical effect is: at this time, the outer diameter of the second tube can be set to be equal to the inner diameter of the positioning screw hole of the locking steel plate, and after the second tube passes through the positioning screw hole, the locking external thread can engage with the positioning screw hole and No further forward movement, ensuring that the second barrel has a certain axial movement distance.

Further, the outer diameter of the distal end of the locking male thread is equal to the outer diameter of the first barrel. The technical effect is as follows: at this time, the distal end of the locking external thread is smoothly connected with the outer wall of the first barrel, and the overall shape of the locking sleeve is not obtrusive, which is convenient for processing and forming.

Further, the inner diameter of the first tube is equal to the inner diameter of the second tube. The technical effect is that the inner diameters of the coaxial first tube and the second tube are equal, which facilitates the smooth insertion of the K-wire and facilitates processing and forming.

Further, the outer wall of the first tube is provided with anti-skid lines. The technical effect is that the friction coefficient of the first tube is increased, and the locking sleeve is prevented from being unstablely held during the operation.

A fracture reduction tool set, comprising two locking steel plates, a plurality of screw sleeves and at least one above-mentioned locking sleeve; a plurality of positioning screw holes are arranged on one of the locking plates, and a plurality of positioning screw holes are arranged on the other locking plates There is a locking hole corresponding to the positioning screw hole; the positioning screw hole is engaged with the locking external thread, and is engaged with the external thread of the screw sleeve; the locking hole includes a threaded hole and a smooth hole; the screw The length of the sleeve is equal to the length of the second barrel.

Further, the locking steel plate includes an arc-shaped section and an extended section, which are respectively used to correspond to the head end of the elongated bone and the middle section of the elongated bone. The technical effect is: since the head and tail ends of elongated bones such as the humerus, ulna, radius, femur, tibia, and fibula are larger in size and smaller in the middle, an arc-shaped segment is set to fit or correspond to the head end of the bone. , while the extended segment is set straight to fit or correspond to the middle of the bone.

Further, the outer diameter of the end face of the screw sleeve is smaller than the outer diameter of the middle part of the screw sleeve. The technical effect is: in this structure, one end or both ends of the screw sleeve are in the shape of a truncated cone, which is convenient for being inserted into the positioning screw hole and the locking hole, and prevents the vibration during the operation from affecting the positioning accuracy.

Further, the positioning screw holes are tapered. The technical effect is that the positioning screw hole and the locking external thread cooperate with each other, and both are in conical meshing.

The beneficial effects of the present invention are:

The locking sleeve and the fracture reduction tool set of the present invention can lock the locking sleeve with the locking steel plate outside the body and the locking steel plate inside the body through the locking external thread after the second tube is passed through the locking steel plate outside the body and abutting the locking steel plate inside the body. The steel plate forms a stable connection structure, avoids the dislocation movement of the upper and lower locking plates during the operation, and determines the appropriate drilling position for the Kirschner wire.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a locking sleeve provided by a first embodiment of the present invention;

2 is a schematic structural diagram of a locking sleeve provided by a second embodiment of the present invention;

3 is a schematic structural diagram of a fracture reduction tool set provided by a third embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a fracture reduction tool set provided by a fourth embodiment of the present invention.

In the figure: 100-first tube; 101-anti-skid pattern; 200-second tube; 300-locking external thread; 400-locking steel plate; 401-positioning screw hole; 402-locking hole; 403-arc segment; 404-extension; 500-screw sleeve.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the invention generally described and labeled in the drawings can be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhanging" etc. do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and features in the embodiments may be combined with each other without conflict.

First embodiment:

FIG. 1 is a schematic structural diagram of a locking sleeve provided by a first embodiment of the present invention. Referring to FIG. 1 , the present embodiment provides a locking sleeve, which includes a first barrel 100 at the distal end and a second barrel 200 at the proximal end. The first barrel 100 and the second barrel 200 are coaxially connected, The proximal end of the first barrel 100 is provided with a locking external thread 300 ; the outer diameter of the locking external thread 300 is larger than that of the second barrel 200 .

Among them, the locking sleeve is formed by an integrated process.

Optionally, the locking external thread 300 may be provided at the proximal end of the first barrel 100 , and may optionally be provided at the distal end of the second barrel 200 .

In addition, as long as the installation and positioning length of the second tube 200 is equal to the length of the remaining screw sleeves 500 after the second tube 200 is placed and screwed, that is, the locking plate 400 placed on the surface of the bone can be locked with the locking plate 400 located outside the human skin. The steel plates 400 may be parallel to each other.

The working principle of the locking sleeve of this embodiment is as follows:

First, the outer diameter of the locking external thread 300 is larger than the outer diameter of the second barrel 200, so the second barrel 200 can pass through the positioning screw holes 401 on the locking plate 400 placed on the skin surface and extend toward the bone surface.

Secondly, since the first barrel 100 and the second barrel 200 are coaxially connected, the locking external thread 300 is provided on the first barrel 100 . After the locking external thread 300 is engaged with the positioning screw hole 401 and the second barrel 200 is inserted into the locking hole 402 on the locking plate 400 placed on the bone surface, the bone position to be drilled by the K-wire is determined.

Finally, other screw sleeves 500 connected to the two locking steel plates 400 are used to locate another position to be drilled to ensure accurate positioning.

Second embodiment:

FIG. 2 is a schematic structural diagram of a locking sleeve provided by a second embodiment of the present invention. Referring to FIG. 2 , this embodiment provides a locking sleeve, which is substantially the same as the locking sleeve of the first embodiment. The difference between the two is that the locking external thread 300 in the locking sleeve of this embodiment is a tapered thread. The outer diameter of the proximal end of the locking male thread 300 is smaller than the outer diameter of the distal end thereof.

In this structure, in addition to good sealing performance, the tapered thread is also convenient for screwing and drilling, and is convenient for screwing in surgical operations.

In any of the above embodiments, further, as shown in FIG. 2 , the outer diameter of the proximal end of the locking external thread 300 is equal to the outer diameter of the second barrel 200 .

In this structure, the outer diameter of the second tube 200 can be set to be equal to the inner diameter of the positioning screw hole 401 of the locking steel plate 400. After the second tube 200 passes through the positioning screw hole 401, the locking external thread 300 can be connected with the positioning screw The hole 401 is engaged and no longer moves forward, ensuring that the second barrel 200 has a certain axial movement distance.

Optionally, in order to ensure that the length of the axial movement of the second barrel 200 is deterministic, the locking external thread 300 can also be set as a straight thread, and is provided on the outer edge of the first barrel 100 or the second barrel 200 Limit structure to achieve.

In any of the above embodiments, further, as shown in FIG. 2 , the outer diameter of the distal end of the locking external thread 300 is equal to the outer diameter of the first barrel 100 .

In this structure, the distal end of the locking external thread 300 is smoothly connected with the outer wall of the first barrel 100, and the overall shape of the locking sleeve is not obtrusive, which is convenient for processing and forming.

In any of the above embodiments, further, the inner diameter of the first tube 100 is equal to the inner diameter of the second tube 200 .

In this structure, the inner diameters of the coaxial first tube 100 and the second tube 200 are equal, which facilitates the smooth insertion of the K-wire and facilitates processing and forming.

In any of the above embodiments, further, as shown in FIG. 2 , the outer wall of the first tube 100 is provided with anti-slip textures 101 .

In this structure, the anti-slip texture 101 increases the coefficient of friction of the first barrel 100, preventing the locking sleeve from being held unstable during the operation.

Third embodiment:

FIG. 3 is a schematic structural diagram of a fracture reduction tool set provided by a third embodiment of the present invention. Referring to FIG. 3 , the present embodiment provides a fracture reduction tool set, which includes two locking steel plates 400 , a plurality of screw sleeves 500 and at least one of the above-mentioned locking sleeves; a locking steel plate 400 is provided with a plurality of positioning screws The other locking steel plate 400 is provided with a locking hole 402 corresponding to the positioning screw hole 401; the positioning screw hole 401 is engaged with the locking external thread 300, and is engaged with the external thread of the screw sleeve 500; the locking hole 402 includes Threaded and smooth holes; the length of the screw sleeve 500 is equal to the length of the second barrel 200 .

The working principle and operation method of the fracture reduction tool set of the present embodiment are as follows:

During surgery, the locking plate 400 with locking holes 402 is placed on the bone surface, and the locking plate 400 with positioning screw holes 401 is placed outside the skin in parallel with the locking plate 400 on the bone surface. Then, insert the locking sleeve through the positioning screw hole 401 of the outer locking steel plate 400, and make the positioning screw hole 401 engage with the locking external thread 300, and insert the second tube 200 into the light hole in the locking steel plate 400 on the bone surface . At this time, the relative positions of the two locking steel plates 400 are determined and cannot slide relative to each other. The other screw sleeves 500 and the threaded holes connected to the two locking steel plates 400 can also locate the position of another K-wire to be drilled, so as to ensure the accurate drilling position.

It should be noted that the length of the screw sleeve 500 is equal to the length of the second barrel 200 , in order to ensure that the two locking steel plates 400 are placed in parallel with each other.

In addition, the diameter of the light hole in the locking steel plate 400 that fits the bone surface is greater than or equal to the outer diameter of the second tube 200 . Threaded holes in the locking plate 400 that conform to the bone surface engage the screw sleeves 500 .

Fourth embodiment:

FIG. 4 is a schematic structural diagram of a fracture reduction tool set provided by a fourth embodiment of the present invention. Referring to FIG. 4 , this embodiment provides a locking sleeve, which is substantially the same as the locking sleeve of the third embodiment. The difference between the two is that the locking steel plate 400 in the locking sleeve of this embodiment includes an arc-shaped segment 403 . and the extension section 404, respectively corresponding to the head end of the elongated bone and the middle section of the elongated bone.

Further, as shown in FIG. 4 , the outer diameter of the end face of the screw sleeve 500 is smaller than the outer diameter of the middle portion of the screw sleeve 500 .

In this structure, one or both ends of the screw sleeve 500 is in the shape of a frustum, which is convenient for being inserted into the positioning screw hole 401 and the locking hole 402, and prevents vibration during operation from affecting the positioning accuracy.

Further, as shown in FIG. 4 , the positioning screw holes 401 are tapered.

In this structure, the positioning screw hole 401 and the locking external thread 300 cooperate with each other, and both are in conical engagement.

In this structure, since the head and tail ends of elongated bones such as the humerus, ulna, radius, femur, tibia, and fibula are larger in size and smaller in the middle, arc segments 403 are provided for fitting or corresponding to the head of the bone. end, and the extension section 404 is arranged straight and is used to fit or correspond to the middle section of the bone.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A locking sleeve, characterized by comprising a first barrel (100) and a second barrel (200), the first barrel (100) and the second barrel (200) being coaxially connected, the proximal end of the first barrel (100) being provided with a locking external thread (300); the locking external thread (300) has an outer diameter larger than that of the second barrel (200).

2. The locking sleeve of claim 1, wherein the locking external thread (300) is a tapered thread, the locking external thread (300) having a proximal end with an outer diameter smaller than an outer diameter of a distal end thereof.

3. The locking sleeve of claim 2, wherein the outer diameter of the locking external thread (300) proximal end is equal to the outer diameter of the second barrel (200).

4. The locking sleeve of claim 3, wherein the outer diameter of the distal end of the locking external thread (300) is equal to the outer diameter of the first barrel (100).

5. The locking sleeve of claim 1, wherein the inner diameter of the first barrel (100) is equal to the inner diameter of the second barrel (200).

6. The locking sleeve of claim 1, wherein the outer wall of the first barrel (100) is provided with an anti-slip texture (101).

7. A fracture reduction kit, comprising two locking steel plates (400), a plurality of screw sleeves (500) and at least one locking sleeve according to any one of claims 1 to 6; a plurality of positioning screw holes (401) are formed in one of the locking steel plates (400), and locking holes (402) corresponding to the positioning screw holes (401) are formed in the other locking steel plate (400); the positioning screw hole (401) is engaged with the locking external thread (300) and is engaged with the external thread of the screw sleeve (500); the locking hole (402) comprises a threaded hole and a light hole; the screw sleeve (500) has a length equal to the length of the second barrel (200).

8. The fracture reduction kit of claim 7, wherein the locking plate (400) comprises an arc-shaped section (403) and an extension section (404) for corresponding to the head end of the elongated bone and the middle section of the elongated bone, respectively.

9. The fracture reduction tool set of claim 7, wherein the outer diameter of the end face of the screw sleeve (500) is smaller than the outer diameter of the middle portion of the screw sleeve (500).

10. The fracture reduction tool set according to claim 7, wherein the positioning screw holes (401) are tapered.

Images