CN215606059U - Single-side barb osteotome - Google Patents

Abstract

The utility model relates to the technical field of medical instrument design, in particular to a single-sided barbed osteotome which comprises an osteotome handle, an osteotome rod and an osteotome head, wherein the osteotome handle is connected with the osteotome rod, the osteotome head is of a shovel-shaped structure, the end part of the osteotome head is provided with a cutting edge, a plurality of barbs with openings facing the end direction of the osteotome rod are punched on the upper surface of the osteotome head, and the lower surface of the osteotome head is a smooth plane. The surgical instrument provided by the utility model has the advantages of simple structure, exquisite design and convenience in operation, and can improve the precision of surgical operation, effectively shorten the surgical time and prevent surgical complications.

Description

Single-side barb osteotome

Technical Field

The utility model relates to the technical field of medical instrument design, in particular to a single-side barbed osteotome.

Background

Total Knee Arthroplasty (TKA) is an effective treatment for severe knee arthropathy today. However, because TKA surgery is relatively long and traumatic, and perioperative bleeding is increased, 1500m L can be accumulated on one side. Research shows that the acute pain after Total Knee Arthroplasty (TKA) is heavier than that after Total Hip Arthroplasty (THA), and the acute pain after TKA is obviously higher than that after THA, which may be related to long operation time, large average age, high BMI and the like of patients in TKA group. In the operation process, the operation time is shortened as much as possible, and the complication incidence rate can be avoided to a great extent.

In the TKA operation, after the four-in-one osteotomy of the femur is completed, the posterior condylar bone block of the femur is often difficult to remove. The prior art adopts traditional osteotome to remove through hitting, prizing, splitting etc. mode, in the use, because the adhesion of rear soft tissue and the hyperplasia of osteophyte, the bone piece is difficult for taking out to accidents such as bone piece fracture, close on bone injury extension injury and collateral ligament thighbone lateral insertion often appear. Not only affects the operation and increases the operation time, but also is easy to cause the occurrence of operation complications.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing the single-sided barbed osteotome which has simple structure and convenient manufacture, can greatly shorten the operation time and prevent the occurrence of operation complications.

The utility model is realized by the following technical scheme:

the utility model provides a single face barb bone knife, its includes handle of a knife, cutter arbor and tool bit, the handle of a knife is connected with the cutter arbor, the cutter arbor is formed by metal sheet integrated into one piece processing with the tool bit, and the cutter arbor is rolled into the round bar shape, the tool bit is equipped with the cutting edge for shovel column structure and tip, the barb of a plurality of openings orientation cutter arbor end direction is gone out in the punching press of tool bit upper surface, and the lower surface is glossy plane.

Preferably, the barbs are triangular in shape.

Optimally, the blade edge width comprises three specifications of 1cm, 1.5cm and 2.0 cm.

Optimally, the plurality of barbs are distributed in a plurality of rows and are arranged in a staggered mode.

Furthermore, the barb end face and the knife face of the knife head are obliquely arranged, and the longitudinal section of the barb is wedge-shaped.

Furthermore, the barb end face is provided with a plurality of saw teeth with tooth shapes facing downwards.

Furthermore, the barb end face is of an inwards concave arc structure.

Further, the handle of a knife is equipped with the cutter arbor mounting hole along the extending direction, and the bolt hole has been seted up to the handle of a knife front portion, installs the bolt device that passes the bolt hole on the handle of a knife outer wall, seted up a plurality of holes of stepping down on the cutter arbor, the bolt of bolt device passes the bolt hole and inserts in the hole of stepping down.

Further, the bolt device includes mount pad and bolt, mount pad fixed mounting is equipped with the installation cavity on the handle of a knife outer wall in the mount pad, the bolt is L shape structure, including inserting pole and pull rod, inserts the pole and inserts the installation cavity, and the pull rod is located outside the installation cavity, fixed mounting has spacing guide ring on the insert rod, and fixed mounting has the spring in the installation cavity, spring tip and spacing guide ring fixed connection, the outer fixed mounting of mount pad has the fixture block.

Further, a gap is reserved at the upper part of the cutter bar, a guide rail is fixedly installed in the cutter bar installing hole, and the cutter bar is clamped on the guide rail at the gap and slides along the guide rail.

The utility model has the advantages of

The single-side barbed osteotome protected by the utility model has the following advantages:

1. simple structure and convenient operation.

2. After the osteotome is finished, the barb surface of the osteotome is downwards punched into the osteotome gap, the barb effectively pierces into the favorable bone block at the lower end during pull-back, then the osteotome is pulled back, the osteotome can quickly take out the bone block, the bone block can not be removed by means of osteotome striking, prying, crushing and the like in the process, the bone block cannot drop, time is saved, misoperation is reduced, and damage beyond the surrounding tissue structure is avoided.

3. The operation is convenient, the operation time can be greatly shortened, and the occurrence of operation complications can be prevented.

4. The length of the osteotome can be adjusted according to actual needs, and the cutting edge of the osteotome can adapt to knee joints with different condyles.

5. The osteotome may also be used for chiseling, separating, removing, etc. osteophytes in knee replacement or other orthopedic surgical procedures.

Drawings

FIG. 1 is a schematic view of the assembly structure of the present invention;

FIG. 2 is a schematic view of an embodiment of barbs;

FIG. 3 is a schematic view of a three-configuration barb embodiment;

in the figure, 1, a knife handle, 2, a knife rod, 3, a knife head, 4, a knife edge, 5, an agnail, 6, a gap, 7, a guide rail, 8, a mounting seat, 9, a mounting cavity, 10, an insertion rod, 11, a limiting guide ring, 12, a spring, 13, a fixture block and 14, a pulling rod are arranged.

Detailed Description

The utility model provides a single face barb bone knife, its includes handle of a knife 1, cutter arbor 2 and tool bit 3, the handle of a knife is connected with the cutter arbor, the tool bit is equipped with cutting edge 4 for shovel column structure and tip, a plurality of openings of tool bit upper surface punching press play barb 5 towards cutter arbor end direction, and the lower surface is glossy plane.

Optimized, the barb is triangle-shaped, and the contained angle between two faces of concrete barb can be preferred 30, 45, 60 or 90, and processing is convenient, can conveniently pull out the bone piece moreover.

Optimally, the blade edge width comprises three specifications of 1cm, 1.5cm and 2.0cm so as to adapt to knee joints with different sizes and condyle widths.

Optimized, a plurality of barbs are multirow and distribute and staggered arrangement, make things convenient for more and take the bone piece out of whole, prevent that the bone piece from omitting or dropping.

According to the first specific embodiment, the barb end face and the knife face of the knife head are obliquely arranged, the longitudinal section of the barb is wedge-shaped, the structure is simple, and the bone block is prevented from being separated from the osteotome from the barb top in the process of pulling the osteotome backward. The angle of inclination between the barbed end face and the face of the insert may preferably be 45 or 60, or a perpendicular arrangement may be used.

In a second embodiment, the end face of the barb is provided with a plurality of saw teeth with downward tooth shapes, so that the friction force between the bone block and the barb can be increased, and the bone block is prevented from being separated from the osteotome from the position above the barb in the process of pulling the osteotome backwards, which is not shown in the attached drawings of the embodiment.

According to the third specific implementation mode, the barb end face is of an inwards concave arc-shaped structure, the bone block can stay at the inwards concave part in the process of pulling the osteotome backwards, and the osteotome is prevented from being separated from the barb top.

Further, the cutter arbor is formed by metal sheet integrated into one piece processing with the tool bit, and the cutter arbor system becomes the round bar shape, and the handle of a knife is equipped with the cutter arbor mounting hole along extending direction, and the bolt hole has been seted up to the handle of a knife front portion, installs the bolt device that passes the bolt hole on the handle of a knife outer wall, seted up a plurality of holes of stepping down on the cutter arbor, the bolt of bolt device passes the bolt hole and inserts downthehole stepping down, sets up a bolt device, and the bolt of bolt device inserts different downthehole stepping down, can adjust the length of cutter arbor as required.

Further, the bolt device includes mount pad 8 and bolt, mount pad fixed mounting is on the handle of a knife outer wall, is equipped with installation cavity 9 in the mount pad, the bolt is L shape structure, including inserting pole 10 and pull rod 14, inserts the pole and inserts in the installation cavity, and the pull rod is located outside the installation cavity, fixed mounting has spacing guide ring 11 on the inserting pole, and fixed mounting has spring 12 in the installation cavity, spring tip and spacing guide ring fixed connection, the outer fixed mounting of mount pad has fixture block 13, and when the bolt needs bayonet, rotatory pull rod to make pull rod and mount pad outer wall paste tightly, the spring makes the bolt move forward under the restoring force effect, until spacing guide ring is located the end of installation cavity, and the end of bolt inserts corresponding spacing downthehole, can accomplish the fixed of cutter arbor and handle of a knife, carries out the operation. When the length of cutter arbor needs to be adjusted, rotatory pull rod outwards draws, make the pull rod catch the fixture block, make the end of bolt shift out spacing hole, can adjust the cutter arbor, make the bolt adjust well the back with corresponding spacing hole, pull out the pull rod after and rotatory, the pull rod breaks away from and loosens behind the fixture block, make the pull rod paste tightly with the mount pad outer wall, the spring makes the insert rod move forward under the restoring force effect, be located the end of installation cavity until spacing guide ring, and the end of bolt inserts corresponding spacing downthehole, can accomplish the fixing of cutter arbor and handle of a knife. The structure and the operation are both simpler, and can adjust the length of cutter rod.

Further, a gap 6 is reserved on the upper portion of the cutter bar, a guide rail 7 is fixedly mounted in the cutter bar mounting hole, the cutter bar is clamped on the guide rail at the gap and slides along the guide rail, relative rotation between the cutter bar and the cutter handle can not occur when the cutter bar is adjusted, and the operation is more convenient and faster.

According to the single-sided barbed osteotome, the cutter bar and the cutter head are integrally formed and processed by the metal plate, the cutter bar is rolled into a round bar shape, the cutter head is of a shovel-shaped structure, and the end part of the cutter head is provided with the cutting edge, so that the structure is simple, and the single-sided barbed osteotome is convenient to manufacture and process.

Simultaneously because the barb of a plurality of openings orientation cutter arbor end direction is gone out in the punching press of cutter head upper surface, the lower surface is glossy plane, and not only the processing technology of barb is fairly simple, and the cutting edge can squeeze into the seam fast moreover to when the osteotome is pulled back, the barb pierces the bone piece, can take out the bone piece fast, need not the bone knife and strikes and remove, and the operation is more convenient, can greatly shorten operating time, prevents the emergence of operation complication.

And set up a bolt device, make the cutter arbor remove in the handle of a knife, can adjust the length of cutter arbor as required fast to adapt to different patients' needs.

And the arrangement of various embodiments can prevent the bone block from separating from the bone knife from the upside of the agnail during the process of pulling the bone knife backwards.

In conclusion, the single-sided barbed osteotome protected by the utility model has the advantages of simple structure and convenience in manufacturing, and can greatly shorten the operation time and prevent the occurrence of operation complications.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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.

Claims (10)

1. The utility model provides a single face barb bone knife, its characterized in that, includes handle of a knife, cutter arbor and tool bit, the handle of a knife is connected with the cutter arbor, the tool bit is equipped with the cutting edge for shovel column structure and tip, the barb of a plurality of openings orientation cutter arbor end direction is gone out in the punching press of tool bit upper surface, and the lower surface is glossy plane.

2. The single-sided barbed osteotome according to claim 1, wherein said barbs are triangular in shape.

3. The single-sided barbed osteotome according to claim 1, wherein said blade edge width comprises three dimensions of 1cm, 1.5cm, and 2.0 cm.

4. The single-sided barbed osteotome according to claim 2, wherein said plurality of barbs are disposed in a plurality of rows and are staggered.

5. The single-sided barbed osteotome according to claim 4, wherein the barbed end face is obliquely disposed with respect to the face of the cutting head and the longitudinal barbed cross-section is wedge-shaped.

6. The single-sided barbed osteotome according to claim 4, wherein the barbed end surface is provided with a plurality of teeth shaped to face downwardly.

7. The single-sided barbed osteotome according to claim 4, wherein the barbed end surface is of concave arcuate configuration.

8. The single-sided barbed osteotome according to claim 1, wherein the cutter bar and the cutter head are integrally formed and machined from a metal plate, the cutter bar is rolled into a round bar shape, the handle is provided with a cutter bar mounting hole along the extending direction, the front portion of the handle is provided with a latch hole, the outer wall of the handle is provided with a latch device passing through the latch hole, the cutter bar is provided with a plurality of abdicating holes, and the latch of the latch device passes through the latch hole and is inserted into the abdicating hole.

9. The single-sided barbed osteotome according to claim 8, wherein said latch means comprises a mounting seat and a latch, said mounting seat is fixedly mounted on the outer wall of said hilt, a mounting cavity is provided in said mounting seat, said latch is of an L-shaped structure and comprises an insertion rod and a pull rod, said insertion rod is inserted into said mounting cavity, said pull rod is located outside said mounting cavity, said insertion rod is fixedly mounted with a position-limiting guide ring, a spring is fixedly mounted in said mounting cavity, the end of said spring is fixedly connected with said position-limiting guide ring, and a fixture block is fixedly mounted outside said mounting seat.

10. The single-sided barbed osteotome according to claim 9, wherein a gap is provided at an upper portion of said arbor, a guide rail is fixedly mounted in said arbor mounting hole, and said arbor is snap-fitted to said guide rail at said gap and slides along said guide rail.

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