CN110711020A

CN110711020A - Two-way draw gear of knee joint

Info

Publication number: CN110711020A
Application number: CN201911017303.3A
Authority: CN
Inventors: 郑川玉; 满毅
Original assignee: Zhabei Central Hospital Jing'an District Shanghai (zhabei Branch Shanghai Changzheng Hospital)
Current assignee: Zhabei Central Hospital Jing'an District Shanghai (zhabei Branch Shanghai Changzheng Hospital)
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-01-21

Abstract

The invention belongs to the technical field of medical instruments, and relates to a knee joint bidirectional traction device which comprises a plurality of traction rods, a plurality of connecting rods and a plurality of lifting connectors; the traction rod consists of a Kirschner wire sleeve, a Kirschner wire and a fastening bolt; the draw bar is vertically detachably connected with the connecting rods, adjacent connecting rods can be movably connected through a lifting connector, and the lifting connector consists of a pressure sensor with a display, a sleeving section, a pressure groove and a pressing nut; the height of the lifting connector can be adjusted through the pressing nut, so that the effect of adjusting the pressure is achieved, and the traction rod can penetrate through the bone. Its advantages are: the traction device is simple to operate, stable in structure, safe, reliable, controllable in traction force, continuous and stable in traction effect, capable of achieving bidirectional traction and free of active counter traction force.

Description

Two-way draw gear of knee joint

Technical Field

The invention relates to the technical field of medical instruments, in particular to a knee joint bidirectional traction device.

Background

At present, the existing tibial tubercle traction system in clinic is an important auxiliary means for treating fracture around the knee joint. After the fracture occurs, the fractured end is pulled by the muscle or tendon attached to it, and displacement such as angulation, shortening, rotation, separation and the like occurs, which easily causes the clamping pressure of blood vessels and nerves, even injury. For patients with serious soft tissue injury or more basic diseases, the reduction and fixation of the emergency operation are not suitable. At this point, tibial tubercle distraction is particularly important. The transverse tibial tubercle layer is provided with the Steiner needle with the diameter of 4.0mm for traction, the contracted muscle tendon can be retensioned, the displaced fracture block is reset or partially reset, the clamping pressure on blood vessels or nerves is reduced, the artery blood supply and vein reflux of tissues around the fracture are facilitated, the soft tissue swelling is reduced, precious time and favorable conditions are strived for phase-selective surgery, the existing tibial tubercle traction is used for traction of lower limbs under the action of gravity of a heavy object at the far end of a traction system, the traction belongs to one-way traction, a patient has discomfort, the counterforce opposite to the traction direction needs to be consciously kept, otherwise, the upper body can autonomously move along with the traction direction, and the traction effect is influenced. In addition, due to the lack of reverse traction towards the upper part of the femur, the traction effect is general, and especially the idea of reducing the fracture by the traction and compression action of the tendons is often difficult to realize.

Chinese patent documents: CN2669797Y discloses a bidirectional traction frame, which comprises side plates, traction pins, anti-traction pins and elastic ribs, wherein the two ends of each side plate are symmetrically provided with a traction hole and an anti-traction hole, a sliding groove is arranged in the middle of the side plate, so that the traction pins can smoothly slide in the sliding groove, and the connection relationship is: the two side plates are symmetrically and parallelly placed together, a traction needle penetrates through a sliding groove of each side plate, the elastic ribs penetrate through the traction holes and are sleeved at two ends of the traction needle, and countertraction needles penetrate through countertraction holes of the side plates. The medical appliance solves the problem that the anti-traction can not be used in the treatment of the upper limb fracture, so that the joints of patients with fractures of phalanges, ulna, humerus and the like can still be bent and stretched to exercise while traction is performed, and the fracture healing is promoted; has the advantages of simple structure, low manufacturing cost, convenient use, good treatment effect, pain reduction for patients, short treatment time, low cost and the like. However, the traction needle is exposed outside by the device, no relevant protection is provided, safety accidents are easily caused, and the elastic band is adopted for traction, so that the force application is unstable, and the treatment effect is influenced.

Chinese patent documents: CN204655080U discloses a phalanx traction reduction frame, which comprises two long rod hooks, two short rod hooks, four needle rod clamps and two tooth-dividing rubber rings, and is used in combination with two kirschner wires which are parallelly driven into phalanges. When the long rod hook is used, the long rod hook and the near-side Kirschner wire are respectively fixedly connected through the needle rod clamp at two sides of a finger, the short rod hook and the far-side Kirschner wire are fixedly connected through the needle rod clamp, the long rod hook and the short rod hook are connected through the tooth separating rubber ring, and traction, resetting and fracture position maintaining are realized through the tensile force of the rubber ring. This patent mainly used resets and fixes interphalangeal joint internal fracture, adopts the needle bar clamp to carry out corresponding connection moreover and fixes, and its stability is difficult to obtain effectual assurance, does not relate to the security problem that how to avoid ke shi needle both ends to expose and lead to yet, also adopts elastic component part tooth rubber circle as the application of force part, leads to the application of force unstable, influences treatment.

Chinese patent documents: CN206548586U discloses a fracture traction pressure device, including adjustable mount, rocking handle, pull pressure bar, connector, bolt and screw rod turning handle, adjustable mount is fan-shaped, and its inside is equipped with the fan-shaped groove, is equipped with the fixed sleeve pipe in the fan-shaped groove, is equipped with the screw on the adjustable mount outer wall, and pull pressure bar is straight screw rod, pulls pressure bar and screw cooperation, and its one end is connected with the rocking handle, and the other end is connected with the connector, installs the screw rod turning handle perpendicularly above the connector, and adjustable mount symmetry is installed in diaphysis both sides of fracture, and relative traction connecting rod connects on the connector, and bolt fastening connector, pull pressure bar and diaphysis length direction are parallel. The patent document has the advantages that the two ends of the fracture can be fixed, the two-way traction can be realized, the rotation of the fractured end of the fracture can be corrected by using the method that the fixing sleeve slides in the fan-shaped groove, the fractured end of the fracture can be pressurized by two-way pressurization after the deformity of the fractured end of the fracture is corrected, the anatomical reduction of the fractured end of the fracture is realized, and the operation is simple and convenient. However, the device of the patent is arranged at a unilateral position and is not symmetrical, when the device is used for continuous traction, the problem of uneven stress can be caused, the curative effect is influenced, even traction failure can be caused directly, the adjustable fixing frame is arranged, the unilateral load of a patient is further increased, when the patient moves, the Kirschner nail can not bear the moment generated by the whole device, the human body is injured, the treatment failure is caused, even medical accidents are caused, the traction force application device and the connector of the device do not have the pressure indication function, so that doctors can not clearly apply large force, and great inconvenience is caused.

In summary, there is a need for a bidirectional knee joint traction device that is simple in operation, stable in structure, safe, reliable, controllable in traction force, continuous and stable in traction effect, capable of performing bidirectional traction, and does not need to actively resist traction force.

Disclosure of Invention

The invention aims to provide a bidirectional knee joint traction device which is simple to operate, stable in structure, safe, reliable, controllable in traction force, continuous and stable in traction effect, capable of realizing bidirectional traction and free of active counter traction force.

In order to achieve the purpose, the invention adopts the technical scheme that:

a knee joint bidirectional traction device comprises a plurality of traction rods, a plurality of connecting rods and a plurality of lifting connectors; the traction rod is of a cylinder structure, a first connecting portion is arranged at the end portion of the traction rod, a second connecting portion matched with the first connecting portion is arranged at one end of each connecting rod, a connector is arranged at the other end of each connecting rod, the second connecting portions are detachably connected with the first connecting portions, the adjacent connecting rods can be movably connected through the lifting connectors, and the traction rods can penetrate through bones and are arranged right opposite to the bones.

As a preferable technical scheme, the traction rod comprises a Kirschner wire, a Kirschner wire sleeve and a fastening bolt, the Kirschner wire sleeve can be detachably connected with two ends of the Kirschner wire, and the Kirschner wire sleeve can be fastened with the Kirschner wire through the fastening bolt.

As a preferred technical scheme, the first connecting portions are cylinder structures with threaded holes and symmetrically arranged at two ends of the traction rod, and correspondingly, the second connecting portions are cylinder structures with external threads and are matched with the first connecting portions.

As a preferred technical scheme, the connecting rod is vertically detachably connected with the traction rod, the connecting rod is adjacent to the other connecting rod opposite to the connecting rod side by side, and the connecting head of the connecting rod is of a trapezoidal external thread structure.

As a preferred technical solution, the lifting connector includes a pressure sensor with a display, a socket section, a pressure groove, and a pressure nut; the pressure applying nut is provided with a trapezoidal internal thread and can be movably connected with the connector, the sleeving section is of a cylindrical hollow structure, the side edge of the pressure applying nut is provided with a pressure sensor with a display, and the tail end of the pressure sensor with the display is provided with a pressure groove.

As a preferable technical solution, the lifting connector further integrates a rechargeable battery therein.

As a preferred technical scheme, the connecting rod has multiple length specifications.

As a preferred technical scheme, the first connecting portion can also be an anti-slip band paved by a plurality of particles, correspondingly, the second connecting portion is an open-loop structure connected by a control bolt, and the open-loop structure can be sleeved and fastened with the anti-slip band through the control bolt.

The invention has the advantages that:

1. the traction rods are respectively arranged in the thighbone and the shinbone in a transverse parallel mode, the two ends of the traction rods are vertically connected with the connecting rods, the connecting rods are arranged between the connecting rods in a side-by-side adjacent mode, and the lifting connectors are connected, so that the moment between the opposite traction rods can be adjusted through the lifting connectors, the operation is convenient, the structure is simple, and bidirectional traction can be achieved through acting force and reacting force.

2. The lifting connector is provided with a pressure sensor with a display, the pressure sensor can clearly monitor the pressure value to ensure that the pressure value is maintained in a normal pressure range, so that the treatment effect is ensured, the traction force is prevented from being too large to cause damage to ligaments, bones and muscles, or the traction force is too small to cause the poor treatment effect.

3. The lifting connector movably connects the two opposite connecting rods together through the sleeving section and the pressure groove, and the pipe wall of the sleeving section and the groove wall of the pressure groove are combined together stably by matching with the pressing nut, so that the corresponding pressure value is convenient to adjust, and the lifting connector is not easy to loosen.

4. The traction rod includes ke shi needle, ke shi needle sleeve pipe, fastening bolt, and the ke shi needle makes the doctor more familiar when the operation as the traction surgical instruments who uses commonly, fastening bolt cooperation bolt hole with ke shi needle sleeve pipe fastening together, make the operation back, the ke shi needle sleeve pipe can not drop, and after adjusting the degree of depth that the ke shi needle cup jointed with the ke shi needle sleeve pipe, still can play stable fastening effect, the wrong injury problem that the needle body leads to can also effectually be prevented to the ke shi needle sleeve pipe.

5. The connector and the pressing nut adopt trapezoidal threads, so that the stability is good, the looseness is not easy to occur, the tooth root strength is high, the manufacturability is good, and the pressure effect can be kept stable.

Drawings

FIG. 1 is a perspective view of a bi-directional knee joint traction device of the present invention.

FIG. 2 is a perspective view of the lower left view of the basic components of a bi-directional knee joint traction device of the present invention.

FIG. 3 is a perspective view of the upper right perspective of each basic component of the bi-directional knee joint traction device of the present invention.

Fig. 4 is a schematic perspective view of the connecting rod and the pressing nut of the bi-directional knee joint traction device of the present invention.

FIG. 5 is a schematic front view of the bi-directional traction device for knee joint of the present invention in traction state.

FIG. 6 is a perspective view of another bi-directional knee traction apparatus of the present invention.

Detailed Description

The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications can be made by those skilled in the art after reading the disclosure of the present invention, and equivalents fall within the scope of the appended claims.

The reference numerals and components referred to in the drawings are as follows:

1. drawbar 2, connecting rod 3, lifting connector

11. Kirschner wire 12, Kirschner wire sleeve 13 and fastening bolt

14. Bolt hole 121, first connection portion 122, threaded hole

21. Second connecting part 22, connector 31, pressure sensor with display

32. A sleeve joint section 33, a pressure groove 34, a pressure nut

123. Antiskid band 211, connecting table 212 and control bolt

Example 1

Referring to fig. 1, fig. 1 is a perspective view of a bi-directional knee joint traction device according to the present invention. A knee joint bidirectional traction device comprises two traction rods 1, four connecting rods 2 and two lifting connectors 3; referring to fig. 2 and 3, fig. 2 is a left-lower perspective schematic view of each basic component of the bi-directional knee joint traction device of the present invention; FIG. 3 is a perspective view of the upper right perspective of each basic component of the bi-directional knee joint traction device of the present invention. The traction rod 1 is of a cylinder structure, and further comprises a Kirschner wire 11, two Kirschner wire sleeves 12 and two fastening bolts 13, wherein the Kirschner wire sleeves 12 are of a hollow cylindrical structure which is made of medical hard PVC materials and is provided with an opening at one end, and bolt holes 14 are further formed in the Kirschner wire sleeves; referring to fig. 1 again, the k-wire sleeve 12 can be detachably connected to both ends of the k-wire 11, the fastening bolt 13 is adapted to the bolt hole 14, and the k-wire 11 can be fastened to the k-wire sleeve 12 through the fastening bolt 13; the Kirschner wire casing 12 is provided with a first connecting part 121, the first connecting part 121 is of a cylindrical structure with a threaded hole 122, and is symmetrically arranged at two ends of the traction rod 1, namely, the positions of the first connecting parts 121 on the assembled traction rod 1 are in a symmetrical relation; referring to fig. 4, fig. 4 is a schematic perspective view of the connecting rod and the pressing nut of the bi-directional knee joint traction device of the present invention. The connecting rod 2 is made of medical hard PVC materials, one end of the connecting rod is provided with a second connecting part 21 matched with the first connecting part 121, the other end of the connecting rod is provided with a connecting head 22, the second connecting part 21 is of a cylindrical structure with external threads, the connecting rod 2 is vertically detachably connected with the traction rod 1, and a prismatic handle is arranged between the second connecting part 21 and the connecting head 22, so that the first connecting part 121 and the second connecting part 21 can be conveniently in threaded connection; the connector 22 is a trapezoidal external thread structure, two opposite connecting rods 2 are arranged side by side and movably connected through the lifting connector 3, please refer to fig. 2 and fig. 3, the lifting connector 3 includes a pressure sensor 31 with a display, a sleeve joint section 32, a pressure groove 33 and a pressure applying nut 34; the pressure applying nut 34 is provided with a trapezoidal internal thread and can be movably connected with the connector 22, the sleeve joint section 32 is of a cylindrical hollow structure with two open ends, the side edge of the sleeve joint section is connected with the pressure sensor 31 with a display, a rechargeable battery capable of providing working voltage is further integrated in the pressure sensor 31 with the display, the tail end of the pressure sensor is provided with the pressure groove 33, and the top end of the pressure groove 33 is a pressure sensing end of the pressure sensor 31 with the display.

The use mode of the invention is as follows: referring to fig. 5, fig. 5 is a front schematic view of a bi-directional knee joint traction device according to the present invention in a traction state. Determining the distance between the traction rods 1, selecting a connecting rod 2 with a proper length, preparing through a corresponding knee joint traction operation, utilizing the existing operation treatment means, respectively and transversely penetrating Kirschner wires 11 through a femoral shaft and a tibia shaft, wherein the positions of the two Kirschner wires 11 are parallel, respectively sleeving Kirschner wire sleeves 12 at two ends of the Kirschner wires 11, keeping the first connecting parts 121 on the two traction rods 1 to be mutually oppositely arranged, screwing the fastening bolt 13 into the bolt hole 14, and enabling the tail end of the bolt to prop against a needle body of the Kirschner wire 11 so as to be tightly fixed with the Kirschner wire sleeves 12 into a whole to form the traction rods 1; on one side of the knee joint, the pressing nut 34 is screwed into the connector 22 of the connecting rod 2, the connecting rod 2 is sleeved with the socket section 32 of the lifting connector 3, the socket section 32 is located at the lower end of the pressing nut 34, the second connecting portion 21 of the connecting rod 2 is screwed into the threaded hole 122 of the first connecting portion 121, another connecting rod 2 is screwed into the other first connecting portion 121 which is oppositely arranged, a pair of connecting rods 2 which are arranged side by side is formed, and the tail end of the connector 22 of the other connecting rod 2 is inserted into the pressure groove 33 of the lifting connector 3. Similarly, another pair of connecting rods 2 which are oppositely arranged side by side are also arranged on the other side of the knee joint in a matching way with the lifting connector 3, and the positions of the connecting rods 2 on the two sides are symmetrical. When utilizing the device to pull, only need rotatory both sides the nut 34 that exerts pressure, when the nut 34 that exerts pressure will when lift connector 3 promotes downwards, lift connector 3 also exerts the connecting rod 2 that links to each other with it through pressure tank 33, through the effect of effort and reaction force, has realized the function of two-way traction, and the pressure sensor 31 that shows is taken simultaneously will sense the pressure value data display on the display screen, can monitor at any time, adjust the size of pressure value. And (5) sequentially removing the corresponding devices until the treatment is finished.

It should be noted that: a knee joint bidirectional traction device comprises a plurality of traction rods 1, a plurality of connecting rods 2 and a plurality of lifting connectors 3, wherein the traction rods 1 are vertically detachably connected with the connecting rods 2, the opposite connecting rods 2 are movably connected through the lifting connectors 3, the traction rods 1 can penetrate through bones and are arranged in a right-to-right mode, so that the moment between the opposite traction rods 1 can be adjusted through the lifting connectors 3, the operation is convenient, the structure is simple, and bidirectional traction can be realized through acting force and reacting force; the traction rod 1 comprises a Kirschner wire 11, a Kirschner wire sleeve 12 and a fastening bolt 13, wherein the Kirschner wire sleeve 12 is of a hollow cylindrical structure with an opening at one end, so that the end part of the Kirschner wire 1 can be effectively hidden to prevent the problem of accidental injury caused by a needle body, the fastening bolt 13 is matched with a bolt hole 14 to fasten the Kirschner wire 11 and the Kirschner wire sleeve 12 together, so that the fastening stability between the Kirschner wire 11 and the Kirschner wire sleeve 12 can be ensured during continuous traction, the Kirschner wire sleeve 12 cannot fall off, and the sleeving depth of the Kirschner wire 11 and the Kirschner wire sleeve 12 can be adjusted as required; the first connecting part 121 is a cylindrical structure with a threaded hole 122 and is symmetrically arranged at two ends of the drawbar 1, the symmetrical arrangement can enable the stress to be more uniform, and the second connecting part 21 is a cylindrical structure with external threads and can be detachably connected with the first connecting part 121 in a threaded manner; the positions of the first connecting parts 121 which need to be placed rightly on the traction rod 1 in a differentiated mode or the sleeving distance between the Kirschner wire 11 and the Kirschner wire casing 12 in a differentiated mode can be used for ensuring that the right connecting rods 2 can be placed side by side in a staggered mode without mutual interference, and the connecting heads 22 cannot be in right contact with each other to cause mutual interference; the lifting connector 3 comprises a pressure sensor 31 with a display, a sleeving section 32, a pressure groove 33 and a pressure applying nut 34, the effect of connecting two connecting rods 2 which are arranged side by side can be realized, the required pressure can be adjusted through lifting, the pressure sensor 31 with the display can monitor pressure applying data in real time to ensure that the pressure applying data is maintained in a normal pressure range, the sleeving section 32 and the pressure groove 33 are respectively connected with the two connecting rods 2, so that the two connecting rods 2 are connected together, the interaction between an acting force and a reaction force is realized, and the lifting connector 3 is prevented from falling off from the connecting rods 2; the pressure applying nut 34 and the connector 22 are provided with matched trapezoidal threads, the lifting of the lifting connector 3 can be realized by adjusting the position of the pressure applying nut 34, so that the pressure is adjusted, the trapezoidal threads are not easy to loosen, the process is good, the root strength is high, and the pressure applying stability is facilitated. The kirschner wire 11, the pressure sensor 31 with the display and the fastening bolt 13 can be obtained by the prior art, and the kirschner wire sleeve 12 can also be manufactured in a matching way according to the selected kirschner wire 11; the pulling pin used in the pulling rod 1 in the present application is not limited to the k-wire 11, but may be a schanz pin or other pin type that can be used as a pulling pin. The length of the connecting rods 2 is different, and the proper connecting rods 2 can be selected according to the actual distance between the traction rods 1. The use mode and steps of the present embodiment can be adjusted according to the actual surgical needs.

Example 2

Referring to fig. 6, fig. 6 is a perspective view of another bi-directional knee traction apparatus of the present invention. A knee joint bidirectional traction device comprises two traction rods 1, four connecting rods 2 and two lifting connectors 3; the traction rod 1 is of a cylinder structure, and further comprises a Kirschner wire 11, two Kirschner wire sleeves 12 and two fastening bolts 13, wherein the Kirschner wire sleeves 12 are of a hollow cylindrical structure with one open end, and bolt holes 14 are further formed in the Kirschner wire sleeves; referring to fig. 1 again, the k-wire sleeve 12 can be detachably connected to both ends of the k-wire 11, the fastening bolt 13 is adapted to the bolt hole 14, and the k-wire 11 can be fastened to the k-wire sleeve 12 through the fastening bolt 13; the Kirschner wire casing 12 is provided with a first connecting part 121, the first connecting part 121 is an anti-slip belt 123 paved by a plurality of fine particles, and the first connecting part 121 is symmetrically arranged at two ends of the traction rod 1, namely the positions of the first connecting parts 121 on the assembled traction rod 1 are in a symmetrical relation; one end of the connecting rod 2 is provided with a second connecting part 21 matched with the first connecting part 121, the second connecting part 21 is of an open-loop structure with an opening, the opening is provided with a connecting platform 211 which is provided with a threaded structure and is oppositely arranged, the second connecting part 21 further comprises a control bolt 212 for adjusting the tightness degree of the open loop, the second connecting part 21 is detachably connected with the first connecting part 121, the other end of the connecting rod is provided with a connector 22, the second connecting part 21 is of a cylindrical structure with external threads, the connecting rod 2 is vertically detachably connected with the traction rod 1, and a prismatic handle is arranged between the second connecting part 21 and the connector 22; the connector 22 is of a trapezoidal external thread structure, two opposite connecting rods 2 are arranged side by side and movably connected through the lifting connector 3, and the lifting connector 3 comprises a pressure sensor 31 with a display, a sleeving section 32, a pressure groove 33 and a pressing nut 34; the pressure applying nut 34 has a trapezoidal internal thread and is movably connected to the connector 22, the sleeve joint section 32 has a cylindrical hollow structure with two open ends, the side of the hollow structure is connected to the pressure sensor 31 with display, a rechargeable battery for providing working voltage is further integrated in the pressure sensor 31 with display, the end of the pressure sensor 31 with display is provided with the pressure tank 33 (not shown in the figure), and the top end of the pressure tank 33 is a pressure sensing end of the pressure sensor 31 with display.

It should be noted that: the embodiment is substantially the same as embodiment 1, and the difference is that the connection structure and connection manner of the first connection portion 121 and the second connection portion 21 are changed, the first connection portion 121 is changed into an anti-slip band 123 structure formed by spreading a plurality of fine particles, correspondingly, the second connection portion 21 is changed into an open-loop structure connected by the control bolt 212, the open-loop structure of the second connection portion 21 can be sleeved on the anti-slip band 123 of the first connection portion 121, the anti-slip band 123 can effectively organize the relative sliding of the second connection portion 21 by fastening with the control bolt 212, and the stability of the device is ensured. The change of the connection mode between the first connection portion 121 and the second connection portion 21 does not affect the effectiveness of the present application.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and additions can be made without departing from the principle of the present invention, and these should also be considered as the protection scope of the present invention.

Claims

1. A bidirectional knee joint traction device is characterized by comprising a plurality of traction rods, a plurality of connecting rods and a plurality of lifting connectors; the traction rod is of a cylinder structure, a first connecting portion is arranged at the end portion of the traction rod, a second connecting portion matched with the first connecting portion is arranged at one end of each connecting rod, a connector is arranged at the other end of each connecting rod, the second connecting portions are detachably connected with the first connecting portions, the adjacent connecting rods can be movably connected through the lifting connectors, and the traction rods can penetrate through bones and are arranged right opposite to the bones.

2. The bidirectional knee joint traction device as claimed in claim 1, wherein the traction rod comprises a kirschner wire, a kirschner wire sleeve and a fastening bolt, the kirschner wire sleeve can be detachably connected with two ends of the kirschner wire, and the kirschner wire sleeve can be fastened with the kirschner wire through the fastening bolt.

3. The bi-directional knee joint traction device according to claim 1, wherein the first connecting portions are cylinder structures with threaded holes and symmetrically arranged at two ends of the traction rod, and correspondingly, the second connecting portions are cylinder structures with external threads and matched with the first connecting portions.

4. The bi-directional knee joint traction device according to claim 1, wherein the connecting rod is vertically detachably connected with the traction rod, the connecting rod is adjacent to another connecting rod opposite to the connecting rod side by side, and the connecting head of the connecting rod is in a trapezoidal external thread structure.

5. The bi-directional knee traction device according to claim 1 or 4, wherein the lifting connector comprises a pressure sensor with display, a socket section, a pressure groove, a pressure nut; the pressure applying nut is provided with a trapezoidal internal thread and can be movably connected with the connector, the sleeving section is of a cylindrical hollow structure, the side edge of the pressure applying nut is provided with a pressure sensor with a display, and the tail end of the pressure sensor with the display is provided with a pressure groove.

6. A bi-directional knee traction device as claimed in claim 5, wherein said lifting connector further incorporates a rechargeable battery therein.

7. A bi-directional knee traction apparatus as claimed in claim 1, wherein said connecting rods are of various length specifications.

8. The bi-directional knee traction device according to claim 1, wherein the first connection portion is an anti-slip band made of a plurality of granules, and correspondingly, the second connection portion is an open-loop structure connected by a control bolt, and the open-loop structure can be sleeved and fastened with the anti-slip band through the control bolt.