阅读说明：本技术 一种锁定套筒及骨折复位工具套装 (Locking sleeve and fracture reduction tool set ) 是由 冯阳 于 2020-07-22 设计创作，主要内容包括：本发明提供了一种锁定套筒,涉及医疗器械技术领域。该锁定套筒包括第一管筒和第二管筒,第一管筒和第二管筒同轴连接,第一管筒的近端设置有锁定外螺纹；锁定外螺纹的外径大于第二管筒的外径。本发明的锁定套筒在将第二管筒穿过体外的锁定钢板抵接体内的锁定钢板后,能够通过锁定外螺纹将锁定套筒与体外的锁定钢板、体内的锁定钢板形成稳定连接结构,避免多次重复固定两个锁定钢板的相对位置,提高了手术效率和手术成功率。在此基础上,本发明还提供了一种骨折复位工具套装。(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.)

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.

Technical Field

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

Background

At present, when fracture reduction operations of fibula, radius, thighbone and other parts are clinically carried out, the commonly used tool comprises two locking steel plates and a plurality of corresponding screw sleeves. A plurality of positioning screw holes connected with screw sleeves are formed in the locking steel plate, during operation, the first locking steel plate is placed on the surface of the skeleton in a fitting mode, and the second locking steel plate is placed outside the skin in parallel with the first locking steel plate. Then, screw sleeves are simultaneously installed on the positioning screw holes of the two locking steel plates. Since the corresponding screw sleeves on the two locking steel plates are coaxial, the appropriate multiple drilling locations on the bone can be found using the k-wire pilot guide.

However, since the two locking steel plates are respectively placed on the surface of the bone and the skin of the human body, the two locking steel plates do not have a reliable connecting structure, and the upper and lower locking steel plates are easily dislocated in the operation, so that the proper drilling position cannot be determined for the kirschner wire.

Disclosure of Invention

The invention aims to provide a locking sleeve and a fracture reduction tool set, which are helpful for solving the technical problems.

The invention is realized by the following steps:

a locking sleeve comprising a first barrel and a second barrel, the first and second barrels being coaxially connected, a proximal end of the first barrel being provided with locking external threads; the locking external thread has an outer diameter greater than an outer diameter of the second barrel.

The working principle of the locking sleeve is as follows:

first, the locking external thread has an outer diameter larger than that of the second barrel so that the second barrel can pass through the positioning screw hole of the locking steel plate placed on the skin surface and extend toward the bone surface.

Secondly, as the first and second tubes are coaxially connected, the locking external thread is provided on the first tube. After the locking external thread is meshed with the positioning screw hole and the second pipe barrel is inserted into the locking hole on the locking steel plate placed on the surface of the bone, the position of the bone to be drilled by the Kirschner wire is determined.

And finally, positioning the position to be drilled additionally by using other screw sleeves connected with the two locking steel plates, so as 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 that of the distal end of the locking external thread. The technical effects are as follows: the taper thread has better sealing performance, is beneficial to screwing and drilling, and is convenient for operation and screw connection.

Further, the locking externally threaded proximal end has an outer diameter equal to the outer diameter of the second barrel. The technical effects are as follows: at this time, the outer diameter of the second pipe barrel can be set to be equal to the inner diameter of the positioning screw hole of the locking steel plate, after the second pipe barrel penetrates through the positioning screw hole, the locking external thread can be meshed with the positioning screw hole and does not move forwards any more, and the second pipe barrel is guaranteed to have a determined axial movement distance.

Further, the locking externally threaded distal end has an outer diameter equal to the outer diameter of the first barrel. The technical effects are as follows: at the moment, the far end of the locking external thread is smoothly connected with the outer wall of the first pipe barrel, and the overall appearance of the locking sleeve is not obtrusive, so that the locking sleeve is convenient to machine and form.

Further, the first barrel has an inner diameter equal to an inner diameter of the second barrel. The technical effects are as follows: the inner diameters of the first tube barrel and the second tube barrel which are coaxial are equal, so that the Kirschner wire can be smoothly placed in the first tube barrel and the second tube barrel, and the first tube barrel and the second tube barrel are convenient to machine and form.

Furthermore, the outer wall of the first pipe barrel is provided with anti-skid grains. The technical effects are as follows: the friction coefficient of the first tube barrel is increased, and the locking sleeve is prevented from being held unstably in the operation process.

A fracture reduction kit comprises two locking steel plates, a plurality of screw sleeves and at least one locking sleeve; one locking steel plate is provided with a plurality of positioning screw holes, and the other locking steel plate is provided with locking holes corresponding to the positioning screw holes; the positioning screw hole is meshed with the locking external thread and is meshed with the external thread of the screw sleeve; the locking hole comprises a threaded hole and a unthreaded hole; the screw sleeve has a length equal to a length of the second barrel.

Furthermore, the locking steel plate comprises an arc-shaped section and an extension section which are respectively used for corresponding to the head end of the long-strip-shaped skeleton and the middle section of the long-strip-shaped skeleton. The technical effects are as follows: as the head and tail end parts of long strip-shaped bones such as humerus, ulna, radius, femur, tibia and fibula are large in size and the middle section is small in size, the arc-shaped section is arranged for being attached to or corresponding to the head end of the bones, and the extension section is arranged straightly and flatly and is used for being attached to or corresponding to the middle section of the bones.

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 effects are as follows: in the structure, one end or two ends of the screw sleeve are in a frustum shape, so that the screw sleeve is favorably inserted into the positioning screw hole and the locking hole, and the positioning precision is prevented from being influenced by vibration in an operation.

Further, the positioning screw hole is conical. The technical effects are as follows: the positioning screw hole is matched with the locking external thread and is meshed with the locking external thread in a conical surface mode.

The invention has the beneficial effects that:

according to the locking sleeve and fracture reduction tool set, 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 upper locking steel plate and the lower locking steel plate are prevented from moving in a staggered mode in an operation, and a proper drilling position is determined for a Kirschner wire.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a locking sleeve according to a first embodiment of the present invention;

FIG. 2 is a schematic structural view of a locking sleeve according to a second embodiment of the present invention;

FIG. 3 is a schematic diagram of a fracture reduction kit according to a third embodiment of the present invention;

fig. 4 is a schematic structural view of a fracture reduction tool set according to a fourth embodiment of the present invention.

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

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention that are generally described and illustrated in the figures can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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

The first embodiment:

fig. 1 is a schematic structural view of a locking sleeve according to 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 a distal end and a second barrel 200 at a proximal end, the first barrel 100 and the second barrel 200 are coaxially connected, and the proximal end of the first barrel 100 is provided with a locking external thread 300; the locking external thread 300 has an outer diameter larger than that of the second barrel 200.

Wherein, the locking sleeve is formed by adopting an integrated process.

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

In addition, as long as the installation and positioning length of the second tube barrel 200 is equal to the length of the rest screw sleeves 500 after the second tube barrel is placed and screwed, the locking steel plate 400 placed on the surface of the bone can be parallel to the locking steel plate 400 positioned outside the skin of the human body.

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

first, the locking male screw 300 has an outer diameter larger than that of the second barrel 200, so that the second barrel 200 can pass through the positioning screw hole 401 of the locking steel 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 male screw 300 is provided on the first barrel 100. After the locking male screw 300 is engaged with the positioning screw hole 401 and the second barrel 200 is inserted into the locking hole 402 of the locking steel plate 400 placed on the surface of the bone, the position of the bone to be drilled by the k-wire is determined.

Finally, the other screw sleeves 500 connected to the two locking steel plates 400 are used for positioning the position to be drilled additionally, so that accurate positioning is guaranteed.

Second embodiment:

fig. 2 is a schematic structural view of a locking sleeve according to a second embodiment of the present invention. Referring to fig. 2, the present embodiment provides a locking sleeve, which is substantially the same as the locking sleeve of the first embodiment, except that the locking external thread 300 of the locking sleeve of the present embodiment is a tapered thread, and the outer diameter of the proximal end of the locking external thread 300 is smaller than that of the distal end thereof.

In the structure, the taper thread has better sealing performance, is beneficial to screwing drilling and is convenient for screwing operation.

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 may be set to be equal to the inner diameter of the positioning screw hole 401 of the locking steel plate 400, and after the second tube 200 passes through the positioning screw hole 401, the locking male screw 300 can be engaged with the positioning screw hole 401 and no longer move forward, ensuring a certain axial movement distance of the second tube 200.

Alternatively, in order to ensure the certainty of the length of the axial movement of the second barrel 200, it is also possible to provide the locking external thread 300 as a straight thread and provide a stopper structure on the outer edge of the first barrel 100 or the second barrel 200.

In any of the above embodiments, further, as shown in fig. 2, the distal end of the locking external thread 300 has an outer diameter 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 molding.

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

In the structure, the inner diameters of the first tube barrel 100 and the second tube barrel 200 which are coaxial are equal, so that the kirschner wire can be smoothly placed in the first tube barrel and the second tube barrel, and the processing and the forming are convenient.

In any of the above embodiments, further, as shown in fig. 2, the outer wall of the first barrel 100 is provided with an anti-slip texture 101.

In this configuration, the slip resistant threads 101 increase the coefficient of friction of the first barrel 100, preventing unstable grasping of the locking sleeve during surgery.

The third embodiment:

fig. 3 is a schematic structural view of a fracture reduction tool set according to a third embodiment of the present invention. Referring to fig. 3, the present embodiment provides a fracture reduction kit, which includes two locking steel plates 400, a plurality of screw sleeves 500, and at least one locking sleeve; one locking steel plate 400 is provided with a plurality of positioning screw holes 401, and the other locking steel plate 400 is provided with locking holes 402 corresponding to the positioning screw holes 401; the positioning screw hole 401 is engaged with the locking external thread 300 and with the external thread of the screw sleeve 500; the locking hole 402 comprises a threaded hole and a light hole; the length of the screw sleeve 500 is equal to the length of the second barrel 200.

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

during surgery, the locking steel plate 400 provided with the locking holes 402 is placed in close contact with the surface of the bone, and the locking steel plate 400 provided with the positioning screw holes 401 is placed outside the skin in parallel with the locking steel plate 400 on the surface of the bone. Then, the locking sleeve is passed through the positioning screw hole 401 of the outer locking steel plate 400, and the positioning screw hole 401 is engaged with the locking male screw 300, and the second tube 200 is inserted into the unthreaded hole in the locking steel plate 400 of the bone surface. At this time, the relative positions of the two locking steel plates 400 are determined and cannot be slid relatively. And other screw sleeves 500 connected to the two locking steel plates 400 and the threaded holes can position the position of the Kirschner wire to be drilled additionally, so that the accurate drilling position is ensured.

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

In addition, the aperture of the unthreaded hole in the locking steel plate 400 that conforms to the bone surface is equal to or greater than the outer diameter of the second barrel 200. Threaded holes in locking plate 400 that engage the bone surface engage screw sleeves 500.

The fourth embodiment:

Fig. 4 is a schematic structural view of a fracture reduction tool set according to a fourth embodiment of the present invention. Referring to fig. 4, the present embodiment provides a locking sleeve, which is substantially the same as the locking sleeve of the third embodiment, except that the locking steel plate 400 of the locking sleeve of the present embodiment includes an arc-shaped section 403 and an extension section 404, which are respectively used for 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 surface of the screw sleeve 500 is smaller than the outer diameter of the middle portion of the screw sleeve 500.

In this structure, one end or both ends of the screw sleeve 500 are frustum-shaped, which is beneficial to being inserted into the positioning screw hole 401 and the locking hole 402, and prevents vibration in the operation from influencing positioning accuracy.

Further, as shown in fig. 4, the positioning screw hole 401 is tapered.

In this configuration, the positioning screw hole 401 is engaged with the locking male screw 300, both of which are in tapered engagement.

In this structure, since the head and tail of the long bar-shaped bones such as humerus, ulna, radius, femur, tibia and fibula are large in size and the middle of the bones is small in size, the arc section 403 is provided for fitting or corresponding to the head of the bones, and the extension section 404 is provided straight for fitting or corresponding to the middle of the bones.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.