Multifunctional bone cutter for spine surgery

Abstract

The utility model discloses a multifunctional bone cutter for spine surgery, which comprises a bottom plate and a bone cutting mechanism, the bone cutting mechanism comprises a positioning seat fixed on the bottom plate, a container used for placing autogenous bone is placed in the positioning seat, a latticed blade is arranged above the container, the blade is arranged in a box body with a lower opening, and the bottom of the box body is provided with an opening. The box body is connected with a lifting mechanism, the lifting mechanism comprises a base arranged at the top of the bottom plate, a rotating handle is rotationally connected to the base, a first lug plate is arranged on the rotating handle, a connecting rod is hinged to the first lug plate, a second lug plate is hinged to the connecting rod, the second lug plate is fixedly connected with a guide block, and the guide block is fixedly connected with the box body; the guide block is slidably connected with a vertical guide rod, and a spring is arranged on the outer side of the guide rod between the guide block and the bottom plate. The multifunctional bone cutter has the three functions of cutting bones, filling and compacting and cutting kirschner wires, the functions are comprehensive, the structure is simple, and more labor is saved when the rotating handle of a lever structure is adopted for operation.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a multifunctional bone shear used in spinal surgery. Background Art

[0002] During spinal surgery, such as lumbar fusion, spinal surgery, and some bone trauma surgeries, autologous bone needs to be harvested for bone transplantation. The harvested autologous bone needs to be trimmed before use. Currently, there is a lack of such instruments on the operating table. Autologous bone is trimmed manually by using bone rongeurs to cut and break up large pieces of bone bit by bit, which consumes a lot of manpower, increases the operation time, and affects the efficiency of the operation. The intervertebral fusion device used in lumbar surgery requires bone to be stuffed and compacted, which requires the use of special tools. Specific tools are required to cut Kirschner wires. Since each instrument has a single function, nurses need to constantly search for and replace instruments to achieve the surgical effect, which increases the difficulty of surgical coordination. Utility Model Content

[0003] 1. Technical problems to be solved:

[0004] In view of the above technical problems, the utility model provides a multifunctional bone shears used in spinal surgery.

[0005] 2. Technical solution:

[0006] A multifunctional bone shear used in spinal surgery includes a base plate and a bone shearing mechanism, the bone shearing mechanism includes a positioning seat fixed to the base plate, a container for placing autologous bone is placed in the positioning seat, a grid-shaped blade is provided above the container, the blade is arranged in a box body with an opening at the bottom, the box body is connected to a lifting mechanism, the lifting mechanism includes a base arranged on the top of the base plate, a rotating handle is rotatably connected to the base, a first ear plate is provided on the rotating handle, a connecting rod is hinged on the first ear plate, the connecting rod is hinged to the second ear plate, the second ear plate is fixedly connected to a guide block, the guide block is fixedly connected to the box body, the guide block is slidably connected to a vertical guide rod, and a spring is provided on the outside of the guide rod between the guide block and the base plate.

[0007] Furthermore, the multifunctional bone shears also includes a bone compression mechanism, which includes a fusion device fixing assembly arranged on the base plate, a pressure rod is provided on the top of the fusion device fixing assembly, and the pressure rod is detachably connected to the bottom of the mounting block, the mounting block is fixedly connected to the guide block, and the second ear plate is arranged on the top of the mounting block.

[0008] Furthermore, the fusion device fixing assembly includes a U-shaped slide fixed on the base plate, a splint is provided in the U-shaped slide, a guide column is fixed on the splint, the guide column is slidably connected to the guide hole on the side of the U-shaped slide, a screw rod is provided on the splint, the screw rod is threadedly connected to one side of the U-shaped slide, and a knob is provided at the front end of the threaded rod.

[0009] Preferably, the pressing rod is connected to the mounting block by insertion or threading.

[0010] Furthermore, a threaded limit block is provided on the top of the guide rod.

[0011] Furthermore, the rotating handle includes a grip rod and a connecting plate, with rotating shafts provided on both sides of the connecting plate, the rotating shafts rotatably connected to the base, a circular ring body fixedly connected to the rotating shaft is provided on the inner side of the base, a plurality of through holes with different inner diameters are provided on the circular ring body, and insertion holes corresponding to the through holes are provided on the base.

[0012] Furthermore, the mounting block and the box body are respectively arranged on both sides of the guide block, and the mounting block and the box body are fixedly connected via an adapter plate and the guide block, wherein the adapter plate between the box body and the guide block is detachably connected to the guide block.

[0013] 3.Beneficial effects:

[0014] This multifunctional bone shear can be driven by pressing a rotating handle to move the grid-shaped blades up and down, thereby cutting the autologous bone in the container into smaller volumes. After cutting, the container can be removed from the positioning seat, facilitating the transfer of the autologous bone into the fusion device. The fusion device is clamped in the fusion device fixing assembly. After the holes in the fusion device are filled with autologous bone, the rotating handle is driven to move the pressing rod up and down to compact it. It also has the function of shearing Kirschner wires. Combining the functions of bone shearing, filling and compacting, and shearing Kirschner wires, this device has comprehensive functions and a simple structure. The lever-structured rotating handle makes operation more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the top view of the multifunctional bone shears of the present invention;

[0016] Figure 2 This is a front view structural diagram of the multifunctional bone shears of the present utility model;

[0017] Figure 3 This is a right side structural diagram of the multifunctional bone shears of the present invention;

[0018] Figure 4 This is a schematic structural diagram of the rotary handle of the utility model;

[0019] Figure 5 This is a schematic diagram of the top view of the fusion device fixing assembly of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings.

[0021] As attached Figure 1 To the attached Figure 5 ,

[0022] Example 1:

[0023] A multifunctional bone shears used in spinal surgery includes a base plate 1 and a bone shearing mechanism 2. The bone shearing mechanism 2 includes a positioning seat 21 fixed on the base plate 1, a container 22 for placing autologous bone is placed in the positioning seat 21, a grid-shaped blade is provided above the container 22, and the blade is arranged in a box body 23 with an opening at the bottom, and the box body 23 is connected to a lifting structure 3. The lifting structure 3 includes a base 31 arranged on the top of the base plate 1, a rotating handle 32 is rotatably connected to the base 31, a first ear plate 33 is provided on the rotating handle 32, a connecting rod 34 is hinged on the first ear plate 33, and the connecting rod 34 is hinged to the second ear plate 35. The second ear plate 35 is fixedly connected to a guide block 36, and the guide block 36 is fixedly connected to the box body 23. The guide block 36 is slidably connected to a vertical guide rod 37. A spring 38 is provided on the outside of the guide rod 37 between the guide block 36 and the base plate 1, and a limit block 39 with a threaded connection is provided on the top of the guide rod 37.

[0024] Initially, due to the upward force of spring 38, the rotating handle 32 is tilted upward, and the box body 23 and its internal blades are located above the container 22. The autologous bone to be removed is placed into the container 22, and the rotating handle 32 is pressed downward. The rotating handle 32 pushes the guide block 36 and the box body 23 downward via the connecting rod 34, and the grid-shaped blades extend into the container 22, mincing the autologous bone in the container 22. The blades are raised again, the container 22 is removed, and it is slightly shaken and cut again. This produces relatively uniformly sized bone fragments, which are then further filled into the fusion device. Due to the provision of spring 38, the rotating handle 32 is always raised when not pressed, making operation more convenient.

[0025] Example 2:

[0026] The multifunctional bone shears also includes a bone pressing mechanism 4, which includes a fusion device fixing assembly 41 arranged on the base plate 1. A pressure rod 42 is provided on the top of the fusion device fixing assembly 41, and the pressure rod 42 is detachably connected to the bottom of the mounting block 43. Preferably, the pressure rod 42 is connected to the mounting block 43 by insertion or threading; different pressure rods 42 can be selected to be fixed on the mounting block 43 according to the style or specification of the fusion device. The mounting block 43 is fixedly connected to the guide block 36, and the second ear plate 35 is arranged on the top of the mounting block 43.

[0027] When in use, fix the fusion device on the fusion device fixing assembly 41, select a suitable pressing rod 42, adjust the fixing position of the fusion device, adjust the pressing rod 42 to align with the filling hole of the fusion device, remove the container 22, transfer the internal bone fragments to the filling hole of the fusion device, press down the rotating handle 32 to drive the mounting block 43 and the pressing rod 42 to compact the filled bone fragments, and repeat the filling and compacting actions until the filling is completed.

[0028] Example 3;

[0029] The device fixation assembly 41 comprises a U-shaped slide 411 fixed to the base plate 1. A clamping plate 412 is positioned within the U-shaped slide 411, onto which a guide post 413 is fixed. The guide post 413 slides into a guide hole on the side of the U-shaped slide 411. A screw 414 is rotatably connected to the clamping plate 412, which is threadedly connected to one side of the U-shaped slide 411. A knob 415 is positioned at the front end of the screw. Rotating the knob 415 advances the screw, pushing the clamping plate 412 toward the other side of the U-shaped slide 411. The device is then placed between the clamping plate 412 and the other sidewall of the U-shaped slide 411, securing the device. Before clamping, the device's fore-aft position can be adjusted to align its filling hole with the upper pressure rod 42.

[0030] Example 4:

[0031] The rotating handle 32 consists of a grip 321 and a connecting plate 322. Axis 323 are mounted on either side of the connecting plate 322, which rotatably connects to the base 31. A circular ring 5 is mounted on the inner side of the base 31, fixedly connected to the rotating ring 323. The ring 5 has multiple through-holes 51 of varying inner diameters, and the base 31 has insertion holes 6 corresponding to the through-holes 51. This structure is used to shear Kirschner wires. To use, the Kirschner wire is inserted through the insertion hole 6 until it enters the corresponding through-hole 51. The rotating handle 32 is then rotated, causing the through-hole 51 and the insertion hole 6 to shift, thus shearing the wire. The different inner diameters of the insertion holes 6 accommodate Kirschner wires of varying sizes.

[0032] Example 5:

[0033] The mounting block 43 and the box body 23 are respectively positioned on either side of the guide block 36. The mounting block 43 and the box body 23 are fixedly connected to the guide block 36 via an adapter plate. The adapter plate between the box body 23 and the guide block 36 is removably connected to the guide block 36. The box body 23 and the guide block 36 are detachable and can be separated after the bone shearing operation to proceed with the next step of filling the fusion cage. Specifically, this can be achieved by, for example, a removable snap-fit connection for easy removal.

[0034] Although the present invention has been disclosed above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims of this application.

Claims

1. A multifunctional bone shear used in spinal surgery, characterized in that: The bone shearing mechanism includes a base plate and a bone shearing mechanism, wherein the bone shearing mechanism includes a positioning seat fixed to the base plate, a container for placing autologous bones placed in the positioning seat, a grid-shaped blade provided above the container, the blade provided in a box body with an opening at the bottom, the box body connected to a lifting mechanism, the lifting mechanism includes a base provided on the top of the base plate, a rotating handle rotatably connected to the base, a first ear plate provided on the rotating handle, a connecting rod hinged to the first ear plate, the connecting rod hinged to the second ear plate, the second ear plate fixedly connected to a guide block, the guide block fixedly connected to the box body, the guide block slidably connected to a vertical guide rod, and a spring is provided on the outside of the guide rod between the guide block and the base plate.

2. The multifunctional bone shears for spinal surgery according to claim 1, characterized in that: The multifunctional bone shears also includes a bone pressing mechanism, which includes a fusion device fixing assembly arranged on the base plate, a pressure rod is provided on the top of the fusion device fixing assembly, and the pressure rod is detachably connected to the bottom of the mounting block, the mounting block is fixedly connected to the guide block, and the second ear plate is arranged on the top of the mounting block.

3. The multifunctional bone shears for spinal surgery according to claim 2, characterized in that: The fusion device fixing assembly includes a U-shaped slide fixed on the base plate, a splint is provided in the U-shaped slide, a guide column is fixed on the splint, the guide column is slidably connected to the guide hole on the side of the U-shaped slide, a screw rod for rotation connection is provided on the splint, the screw rod is threadedly connected to one side of the U-shaped slide, and a knob is provided at the front end of the threaded rod.

4. A multifunctional bone shear for spinal surgery according to claim 2 or 3, characterized in that: The pressing rod is connected to the mounting block by inserting or threading.

5. The multifunctional bone shears for spinal surgery according to claim 1, characterized in that: A threaded limit block is provided on the top of the guide rod.

6. The multifunctional bone shears for spinal surgery according to claim 1, characterized in that: The rotating handle includes a grip rod and a connecting plate. A rotating shaft is provided on both sides of the connecting plate. The rotating shaft is rotatably connected to the base. A circular body is provided on the inner side of the base for fixing the rotating shaft. The circular body is provided with multiple through holes with different inner diameters, and the base is provided with insertion holes corresponding to the through holes.

7. The multifunctional bone shears for spinal surgery according to claim 4, characterized in that: The mounting block and the box body are respectively arranged on both sides of the guide block, and the mounting block and the box body are fixedly connected through an adapter plate and the guide block, and the adapter plate between the box body and the guide block is detachably connected to the guide block.

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