CN219184060U

CN219184060U - External positioner of intertrochanter fracture

Info

Publication number: CN219184060U
Application number: CN202320166310.5U
Authority: CN
Inventors: 李仁波
Original assignee: THIRD PEOPLE'S HOSPITAL OF DALIAN
Current assignee: THIRD PEOPLE'S HOSPITAL OF DALIAN
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-06-16
Anticipated expiration: 2033-02-09

Abstract

The utility model provides an external positioning device for intertrochanteric fracture, and relates to the technical field of medical appliances. The connecting pivot comprises a first connecting piece and a second connecting piece, wherein a first through hole is formed in the first connecting piece, the curved Kirschner wire penetrates through the first through hole and can move relative to the first through hole, the second connecting piece is movably connected to the end part of the first connecting piece, a second through hole is formed in the second connecting piece, the straight Kirschner wire penetrates through the second through hole and can move relative to the second through hole, the second connecting piece can rotate relative to the first connecting piece so that the straight Kirschner wire can rotate relative to the curved Kirschner wire, left-right movement, up-down movement and rotation between the straight Kirschner wire and the curved Kirschner wire are realized through the connecting pivot, the intramedullary nail feeding point can be rapidly and accurately determined, the operation time is saved, the operation efficiency is improved, especially good guiding significance is achieved for a beginner, and the operation safety and reliability are improved.

Description

External positioner of intertrochanter fracture

Technical Field

The utility model relates to the technical field of medical appliances, in particular to an external positioning device for intertrochanteric fracture.

Background

Intertrochanteric fractures usually occur between 66 and 76 years old, with a 3-fold higher rate in females than in males. Studies with 300 intertrochanteric fractures of femur by Griffin and Boyd showed that the patient's mortality rate within 3 months after injury was 16.7% and approximately 2 times that of the femoral neck fracture patient. The reason for such high mortality is that the patient is older, the fracture is more traumatic, the blood loss after the fracture is large, and the treatment operation is relatively large, so that the intertrochanteric fracture is a serious fracture.

The treatment of intertrochanteric fractures of the femur can be effected by conservative treatment if only fracture healing is considered. However, the death rate of the elderly patients is high, the limb movement is limited for a long time in the conservative treatment, and fracture complications are more. Therefore, in recent years, it is agreed that the treatment principle of intertrochanteric fracture is that the firm internal fixation of fracture and early limb activity after operation of patient, horowitz report that in intertrochanteric fracture patient, the patient death rate of traction treatment group is 34.6%, while the patient death rate of internal fixation group is 17.5%. Due to the improvement of the surgical technique, the internal fixation materials are continuously developed, and the occurrence of surgical complications is greatly reduced. Surgical treatment of intertrochanteric fractures has become the method of choice.

Intramedullary fixation is mainly a method for treating proximal femur fracture, and the proposal of the concept has important significance for the development of the whole long bone fracture treatment concept, and the fixation operation has the characteristics of minimally invasive, small soft tissue interference, blood transportation protection and high healing rate. Research shows that the marrow expansion in operation can stimulate periosteum and realize bone grafting at broken ends of bones, thereby promoting fracture healing. The intramedullary fixation operation has obvious advantages, the operation technology is easy to master, the incision is small, the bleeding is less, the intramedullary fixation operation is a preferred mode for treating the fracture, the intramedullary fixation operation has more obvious reconstruction effect on the lateral wall and better stability compared with the intramedullary fixation operation represented by dynamic hip screws.

The applicant found that at least the following technical problems exist in the prior art: along with the deep research of medical workers on intertrochanter fracture of femur, various intramedullary nails are continuously improved and updated, the selection of a needle insertion point is particularly important for ensuring the fixation of an intramedullary center, and the needle insertion point is accurate, so that two near-end screws can not only increase holding force and anti-rotation capability, but also reduce complications such as screw cutting, broken nails, penetrating out and the like, firmly fix unstable fracture and reduce fracture caused by stress concentration, and the condition of internal fixation failure caused by poor needle insertion point positions of the intramedullary nails frequently occurs in the existing clinical work, and the quick and accurate determination of the needle insertion point of the intramedullary nail is difficult for a beginner.

Disclosure of Invention

The utility model aims to provide an external positioning device for intertrochanter fracture, which solves the technical problem that the needle insertion point of an intramedullary nail cannot be rapidly and accurately determined in the prior art. The preferred technical solutions of the technical solutions provided by the present utility model can produce a plurality of technical effects described below.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an external positioner of tuberosity fracture, includes straight kirschner wire, crooked kirschner wire, connection pivot, the connection pivot includes first connecting piece and second connecting piece, first through-hole has been seted up on the first connecting piece, crooked kirschner wire wears to establish in the first through-hole and can be relative first through-hole removes, second connecting piece swing joint is in the tip of first connecting piece, the second through-hole has been seted up on the second connecting piece, straight kirschner wire wears to establish in the second through-hole and can be relative the second through-hole removes, the second connecting piece can be relative first connecting piece rotates so that straight kirschner wire is relative crooked kirschner wire rotates.

Preferably, the connecting hub further comprises a third connecting piece, wherein the third connecting piece is movably connected to the first connecting piece and is located between the second connecting piece and the curved k-wire, and the third connecting piece can form extrusion contact with the curved k-wire so as to limit the relative movement between the curved k-wire and the first connecting piece.

Preferably, the first connecting piece is cylindrical, the first connecting piece is provided with the first through hole in a penetrating way along the circumferential direction of the first connecting piece, the aperture of the first through hole is matched with the outer diameter of the curved kirschner wire, and the outer wall of the first connecting piece is provided with external threads along the axial direction of the first connecting piece.

Preferably, the connecting groove has been seted up to the one end of second connecting piece, the connecting groove is cylindric, the internal diameter of connecting groove and the external diameter phase-match of first connecting piece, the inner wall of connecting groove is provided with the internal thread so that the second connecting piece with first connecting piece threaded connection, the second connecting piece is kept away from the one end of connecting groove has run through along its circumference direction and has been seted up the second through-hole, the aperture of second through-hole with the external diameter phase-match of straight line k's needle.

Preferably, the third connecting piece is provided with a connecting hole along the axial direction thereof, the connecting hole is in a circular ring shape, the inner diameter of the connecting hole is matched with the outer diameter of the first connecting piece, and the inner wall of the connecting hole is provided with internal threads so that the third connecting piece is in threaded connection with the first connecting piece.

Preferably, the curved k-wire comprises a first straight rod section, a curved section and a second straight rod section, wherein two ends of the curved section are respectively connected with the first straight rod section and the second straight rod section, the first straight rod section is mutually perpendicular to the second straight rod section, and the second straight rod section is penetrated in the first through hole.

Preferably, the second connecting piece has a hexagonal prism shape.

Preferably, the third connecting member has a hexagonal prism shape.

The beneficial effects of the utility model are as follows: the connecting hinge is provided with the first connecting piece and the second connecting piece, the first connecting piece can drive the straight Kirschner wire to move up and down relative to the bent Kirschner wire, the straight Kirschner wire can move left and right relative to the second connecting piece, and the second connecting piece can drive the straight Kirschner wire to rotate relative to the bent Kirschner wire;

the device is arranged in such a way, not only can the thighbone tuberosity point be determined through two-dimensional positioning between the straight Kirschner wire and the curved Kirschner wire and projected to the body surface, the optimal operation incision is selected, but also the central axis of the femoral shaft can be determined through one of the straight Kirschner wire and the curved Kirschner wire, and the entering direction of the guide pin is guided;

through using this device, can be fast, accurate confirm intramedullary nail needle insertion point, practiced thrift operation time, improve operation efficiency, especially play fine guiding meaning to the beginner, increase operation security and reliability, increase beginner's operation's confidence simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a side elevational structural view of the present utility model;

FIG. 2 is a front view block diagram of the present utility model;

FIG. 3 is a front view of the present utility model, wherein the second connector rotates the straight Kirschner wire by 30 degrees;

FIG. 4 is a side view of the connecting hub of the present utility model with the second connector rotated 30;

FIG. 5 is an exploded view of the present utility model, wherein the first connector is further shown in cross-section;

in the figure, 1, a straight Kirschner wire;

2. bending the Kirschner wire; 21. a first straight pole section; 22. a curved section; 23. a second straight rod section;

3. the connecting hinge; 31. a first connector; 311. a first through hole; 32. a second connector; 321. a connecting groove; 322. a second through hole; 33. a third connecting member; 331. and a connection hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

In the description of the present utility model, it should be understood that the terms "center", "side", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in fig. 1 are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

Referring to fig. 1 to 5, the utility model provides an external positioning device for intertrochanter fracture, which comprises a straight kirschner wire 1, a curved kirschner wire 2 and a connecting hub 3, wherein the straight kirschner wire 1 and the curved kirschner wire 2 are contacted with the skin of a human body, the curved kirschner wire 2 is arranged closer to the skin, the connecting hub 3 comprises a first connecting piece 31 and a second connecting piece 32, a first through hole 311 is formed in the first connecting piece 31, the curved kirschner wire 2 is arranged in the first through hole 311 in a penetrating way and can move relative to the first through hole 311, the second connecting piece 32 of the curved kirschner wire 2 is movably connected to the end part of the first connecting piece 31, a second through hole 322 is formed in the second connecting piece 32, the straight kirschner wire 1 is arranged in the second through hole 322 in a penetrating way and can move relative to the second through hole 322, and the second connecting piece 32 can rotate relative to the first connecting piece 31 so that the straight kirschner wire 1 can rotate relative to the curved kirschner wire 2;

through being provided with first connecting piece 31 and second connecting piece 32 in connecting pivot 3, first connecting piece 31 can drive straight line kirschner wire 1 and crooked kirschner wire 2 and reciprocate, and straight line kirschner wire 1 can be relative second connecting piece 32 and left and right movements, and second connecting piece 32 can drive straight line kirschner wire 1 and crooked kirschner wire 2 and rotate, and the rotation scope is 0 ° to 30 ° of preference;

the device is arranged in such a way, not only can the thighbone tuberosity point be determined through the two-dimensional positioning between the straight Kirschner wire 1 and the curved Kirschner wire 2 and projected to the body surface, the optimal operation incision is selected, but also the central axis of the femoral shaft can be determined through one of the straight Kirschner wire 1 and the curved Kirschner wire 2, and the entering direction of the guide wire is guided;

As an alternative embodiment, the connection hub 3 further includes a third connecting member 33, where the third connecting member 33 is movably connected to the first connecting member 31 and is located between the second connecting member 32 and the curved k-wire 2, and the third connecting member 33 can form a pressing contact with the curved k-wire 2 to limit the relative movement between the curved k-wire 2 and the first connecting member 31, so as to avoid the connection hub 3 from moving downward relative to the curved k-wire 2 under the action of gravity.

As an alternative embodiment, the first connecting piece 31 is cylindrical, the first connecting piece 31 is provided with a first through hole 311 in a penetrating way along the circumferential direction, the aperture of the first through hole 311 is matched with the outer diameter of the curved k-wire 2, the curved k-wire 2 can move in the first through hole 311, and certain tight connection exists between the two, so that the curved k-wire 2 can move in the first through hole 311 under the action of external force, but the curved k-wire 2 can be ensured to keep still when no external force exists;

the outer wall of the first connecting member 31 is provided with an external thread in its axial direction to facilitate the threaded connection with the second and third connecting

members

32 and 33.

As an alternative embodiment, a connecting groove 321 is formed at one end of the second connecting piece 32, the connecting groove 321 is in a cylindrical shape, the inner diameter of the connecting groove 321 is matched with the outer diameter of the first connecting piece 31, an inner thread is formed on the inner wall of the connecting groove 321 so as to enable the second connecting piece 32 to be in threaded connection with the first connecting piece 31, the second connecting piece 32 can rotate relative to the first connecting piece 31, and the straight kirschner wire 1 can be driven to rotate in the rotating process, so that the relative rotation between the straight kirschner wire 1 and the curved kirschner wire 2 is realized;

the second connecting piece 32 is kept away from the one end of spread groove 321 and is run through along its circumference direction and has been seted up the second through-hole 322, the aperture of second through-hole 322 and the external diameter phase-match of straight line kirschner wire 1, straight line kirschner wire 1 can wear to establish in the second through-hole 322 to there is certain zonulae occludens between the two, makes straight line kirschner wire 1 can remove in the second through-hole 322 under the exogenic action, but can guarantee again that straight line kirschner wire 1 can keep motionless when no exogenic action.

As an alternative embodiment, the third connecting piece 33 is provided with a connecting hole 331 along an axial direction of the third connecting piece 33, the connecting hole 331 is in a ring shape, an inner diameter of the connecting hole 331 is matched with an outer diameter of the first connecting piece 31, an inner thread is arranged on an inner wall of the connecting hole 331 so that the third connecting piece 33 is in threaded connection with the first connecting piece 31, the third connecting piece 33 can rotate relative to the first connecting piece 31, the third connecting piece 33 can move close to or far away from the sinkers 2 in the rotating process, when the sinkers 2 close to the bending are moved to a limiting position, the third connecting piece can be in pressing contact with the sinkers 2, therefore, relative movement between the connecting hub 3 and the sinkers 2 is further limited, the connecting hub 3 is prevented from moving downwards relative to the sinkers 2 under the action of gravity, when the sinkers 2 far away from the bending are moved, the pressing contact between the connecting hub 3 and the sinkers 2 can be relieved, and at the moment, the position of the connecting hub 3 can be adjusted, so that the position of the connecting hub 3 relative to the sinkers 2 is adjusted.

As an alternative embodiment, the curved k-wire 2 includes a first straight bar section 21, a curved section 22 and a second straight bar section 23, two ends of the curved section 22 are respectively connected with the first straight bar section 21 and the second straight bar section 23, the first straight bar section 21 is perpendicular to the second straight bar section 23, the second straight bar section 23 is arranged in the first through hole 311 in a penetrating manner, the length of the first straight bar section 21 and the second straight bar section 23 is preferably 20cm, and the diameter of the curved k-wire 2 is preferably 2mm.

As an alternative embodiment, the diameter of the straight k-wire 1 is preferably 2mm, and the length of the straight k-wire 1 is preferably between 20cm and 30 cm.

As an alternative embodiment, the second connecting member 32 has a hexagonal prism shape, so that the second connecting member 32 is similar to the nut of the outer hexagonal bolt, which is convenient for production and manufacturing, and also convenient for the medical staff to hold the second connecting member 32 to adjust the angle and the positional relationship.

As an alternative embodiment, the third connecting member 33 has a hexagonal prism shape, so that the third connecting member 33 may be directly made of a hexagonal nut, which is convenient for purchase and obtaining, and it should be noted that, in order to minimize the volume and size of the connecting hub 3, the third connecting member 33 preferably has a relatively thin thickness.

The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. The external positioning device for the intertrochanter fracture is characterized by comprising a straight Kirschner wire (1), a curved Kirschner wire (2) and a connecting hinge (3), wherein: the connecting hub (3) comprises a first connecting piece (31) and a second connecting piece (32), a first through hole (311) is formed in the first connecting piece (31), the bent Kirschner wire (2) is arranged in the first through hole (311) in a penetrating mode and can move relative to the first through hole (311), the second connecting piece (32) is movably connected to the end portion of the first connecting piece (31), a second through hole (322) is formed in the second connecting piece (32), the straight Kirschner wire (1) is arranged in the second through hole (322) in a penetrating mode and can move relative to the second through hole (322), and the second connecting piece (32) can rotate relative to the first connecting piece (31) so that the straight Kirschner wire (1) rotates relative to the bent Kirschner wire (2).

2. The intertrochanteric fracture in-vitro positioning device according to claim 1, wherein: the connecting hub (3) further comprises a third connecting piece (33), the third connecting piece (33) is movably connected to the first connecting piece (31) and located between the second connecting piece (32) and the curved kirschner wire (2), and the third connecting piece (33) can form extrusion contact with the curved kirschner wire (2) so as to limit the relative movement between the curved kirschner wire (2) and the first connecting piece (31).

3. The intertrochanteric fracture in-vitro positioning device according to claim 2, wherein: the first connecting piece (31) is cylindrical, the first connecting piece (31) penetrates through the first through hole (311) along the circumferential direction of the first connecting piece, the aperture of the first through hole (311) is matched with the outer diameter of the curved kirschner wire (2), and external threads are arranged on the outer wall of the first connecting piece (31) along the axial direction of the outer wall of the first connecting piece.

4. An intertrochanteric fracture in vitro positioning device according to claim 3, wherein: the utility model discloses a novel straight-line Kirschner wire, including first connecting piece (31), second connecting piece (32), connecting groove (321) have been seted up to one end of second connecting piece (32), connecting groove (321) are cylindric, the internal diameter of connecting groove (321) matches with the external diameter of first connecting piece (31), the inner wall of connecting groove (321) is provided with the internal thread so that second connecting piece (32) with first connecting piece (31) threaded connection, second connecting piece (32) keep away from one end of connecting groove (321) has run through along its circumference direction and has seted up second through-hole (322), the aperture of second through-hole (322) with the external diameter phase-match of straight-line Kirschner wire (1).

5. An intertrochanteric fracture in vitro positioning device according to claim 3, wherein: the third connecting piece (33) is provided with a connecting hole (331) along the axial direction of the third connecting piece, the connecting hole (331) is in a circular ring shape, the inner diameter of the connecting hole (331) is matched with the outer diameter of the first connecting piece (31), and the inner wall of the connecting hole (331) is provided with internal threads so that the third connecting piece (33) is in threaded connection with the first connecting piece (31).

6. The intertrochanteric fracture in-vitro positioning device according to claim 1, wherein: the curved Kirschner wire (2) comprises a first straight rod section (21), a curved section (22) and a second straight rod section (23), wherein two ends of the curved section (22) are respectively connected with the first straight rod section (21) and the second straight rod section (23), the first straight rod section (21) is mutually perpendicular to the second straight rod section (23), and the second straight rod section (23) is penetrated in the first through hole (311).

7. The intertrochanteric fracture in-vitro positioning device according to claim 1, wherein: the second connecting piece (32) is in a hexagonal prism shape.

8. The intertrochanteric fracture in-vitro positioning device according to claim 2, wherein: the third connecting piece (33) is in a hexagonal prism shape.