Orthopedic trephine

Abstract

The utility model belongs to the technical field of medical instruments, and discloses an orthopedic trephine which comprises a hollow trephine body, the trephine body comprises an inner tube, and a saw head is arranged at one end of the inner tube; a pentagonal joint is arranged at the other end of the inner pipe; an interface at one end of the pentagonal joint of the trephine is connected with the pentagonal sleeve of the trephine handle; the trephine handle comprises a pressing reset type clamping ring, a pentagonal sleeve is arranged on the inner wall of the clamping ring, and a spring is arranged on the outer side of the pentagonal sleeve. The pentagonal sleeve is used in cooperation with the clamping ring, and the trephine is fixedly connected or loosened. A trephine protection sleeve is arranged on the outer side of the trephine, the trephine protection sleeve comprises a sleeve, the sleeve can determine the position of the target tissue, and the trephine works by penetrating through a trephine protection sleeve channel; the trephine, the trephine handle and the sleeve are all made of metal materials; the trephine saw head solves the problems that a traditional trephine saw head is large in resistance in the cutting process, and the cutting force and the cutting direction are not easy to master.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an orthopedic trephine. Background Art

[0002] Minimally invasive orthopedic surgery is a type of surgery performed using modern medical devices and related equipment such as arthroscopes and spinal endoscopes. It has the advantages of small incisions, mild pain, and easy recovery. The existing ring saw is a commonly used tool for minimally invasive orthopedic surgery with only 90° equilateral triangle single-directional saw teeth to remove and correct bone tissue.

[0003] The structure of the existing ring saw head ( Figure 6 ) It does not have the bidirectional streamlined cutting function, is difficult to operate and not easy to master, and often results in the cutting site being not precise enough during surgery and exceeding the range of the target tissue. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides an orthopedic ring saw, the saw head of which can be reused and can perform bidirectional spiral precise resection, thereby minimizing the resistance during cutting or correction, being easy to operate and having excellent use effect.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] An orthopedic ring saw comprises a hollow ring saw, which comprises an inner tube, one end of which is provided with a saw head; the other end of the inner tube is provided with a pentagonal joint; an interface at one end of the pentagonal joint of the ring saw is connected to a pentagonal sleeve inside a clamping ring of a ring saw handle, the pentagonal joint and the pentagonal sleeve are coaxially arranged, the ring saw handle comprises a pressable and resettable clamping ring, the inner wall of the clamping ring is provided with a pentagonal sleeve, which is used in conjunction with the clamping ring to fix or release the ring saw; a ring saw protective sleeve is provided on the outer side of the ring saw, and the ring saw passes through the channel of the ring saw protective sleeve to determine the location of the target tissue for work.

[0007] Furthermore, the ring saw includes a saw head arranged at one end of the inner tube, and the end of the saw head is provided with a plurality of circular closed-loop structures with uniform wavy continuous teeth ( Figure 7 ); By holding the horizontal handle of the ring saw, it can be rotated continuously in the forward or reverse direction, while driving the ring saw head in the same direction to perform spiral precise resection of the target tissue, minimizing the resistance generated during cutting or correction.

[0008] Furthermore, the ring saw includes a pentagonal joint arranged at the other end of the inner tube, the pentagonal joint and the inner tube are coaxial, the pentagonal joint is slightly wider than the cross section of the inner tube, and the pentagonal joint is a pentagonal prism with an annular bayonet.

[0009] Furthermore, a pentagonal through hole is provided in the inner wall of the pentagonal sleeve, a circular through hole is provided at the rear of the pentagonal through hole, the outer surface of the circular through hole is a handle rod and a cross handle, and the handle rod and the cross handle are provided with a "T"-shaped structure.

[0010] Furthermore, the ring saw handle includes a pressable reset clamp ring, the outer wall of the clamp ring is provided with a cylindrical shape, the inner wall of the clamp ring is provided with a pentagonal sleeve, and the inner wall of the pentagonal sleeve is provided with a marble. The marble cooperates with the clamp ring to lock or loosen the pentagonal joint of the ring saw, thereby fixing or loosening the ring saw.

[0011] Furthermore, a hollow shovel-shaped structure is provided at the end of the cannula, which can fix the position of the target tissue.

[0012] Furthermore, a gourd-shaped handle is provided on the top of the sleeve, and a keyway-shaped channel is provided on the handle. The channel can also fix the position of the target tissue by passing an auxiliary instrument.

[0013] Furthermore, the ring saw works by passing through the ring saw protection sleeve channel.

[0014] Furthermore, the ring saw, the ring saw handle and the sleeve are all made of metal materials.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) Compared with the features of existing ring saw heads, the saw head of this device has a bidirectional spiral cutting or correction of bone tissue, small cutting resistance, easy to control, good stability and strong durability.

[0017] (2) Compared with existing products, this device can cut the target tissue accurately and effectively, and minimize the deviation of the target tissue caused by the removal or correction of relatively hard bone tissue parts, which affects the normal cutting function of the target tissue, so as to facilitate the habits of different types of operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an exploded view of the utility model in Example 1;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model in Example 1;

[0020] Figure 3 Schematic diagram of the three-dimensional structure of the inner core in Example 1;

[0021] Figure 4 A half-section view of the ring saw handle of the utility model in Example 1;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the utility model in Example 2;

[0023] Figure 6A schematic diagram of a conventional ring saw head;

[0024] Figure 7 This is a schematic diagram of a ring saw head of the present invention;

[0025] In the figure: horizontal handle 1, handle rod 2, spring 3, clamp ring 4, pentagonal sleeve 5, pentagonal joint 6, handle 7, sleeve 8, inner tube 9, saw head 10, marble 11. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further explained below with reference to the accompanying drawings.

[0027] Example 1

[0028] See also Figures 1-4 , an orthopedic ring saw, including a hollow ring saw, the ring saw includes a cylindrical inner tube 9, one end of the inner tube 9 is provided with a saw head 10, the saw head 10 is a bidirectional spiral saw tooth extended from one end of the ring saw; the other end of the inner tube 9 is provided with a pentagonal pentagonal joint 6 with a diameter larger than the inner tube 9, the outer wall of the pentagonal joint 6 is provided with an annular bayonet, the pentagonal joint 6, the inner tube 9 and the saw head 10 are hollow coaxial structures, the inner cavity of the pentagonal joint 6, the inner cavity of the inner tube 9 and the inner cavity of the saw head 10 The cavity is through-going; the end interface of the pentagonal joint 6 of the ring saw is connected to the inner wall of the pentagonal sleeve 5 of the ring saw handle, and the ring saw handle includes a cylindrical clamping ring 4, and the inner wall of the clamping ring 4 is provided with a pentagonal sleeve 5 of a hollow pentagonal column, and the end of the pentagonal sleeve 5 is connected to the handle rod 2, and a spring 3 is sleeved on the outside of the handle rod 2 and the pentagonal sleeve 5. The clamping ring 4, the pentagonal sleeve 5, the handle rod 2 and the spring 3 are coaxially arranged; the handle rod 2 and the cross handle 1 form a vertical 90° structure, that is: a "T"-shaped structure.

[0029] It also includes a marble 11 placed in the step hole on the inner wall of the pentagonal sleeve 5, and a semicircular groove is provided on the inner wall of the clamping ring 4 on the outside of the pentagonal sleeve 5 directly below the step hole on the inner wall of the pentagonal sleeve 5; when holding the horizontal handle 1 of the ring saw handle and pulling the clamping ring 4, the semicircular groove on the inner wall of the clamping ring 4 is aligned with the step hole on the inner wall of the pentagonal sleeve 5, and at this time, the marble 11 just falls into the semicircular groove with the clamping ring 4, so that the pentagonal joint 6 of the ring saw can be inserted into the channel of the pentagonal sleeve 5; release the hand pulling the clamping ring 4, and the marble 11 is just pushed into the outer wall of the pentagonal joint 6 where the annular bayonet is provided, and at this time, the ring saw and the ring saw handle are in a tightly connected state, and form a coaxial arrangement structure that becomes one with each other. Again, pull the clamping ring 4 of the ring saw handle to make the marble 11 fall into the semicircular arc groove preset in the clamping ring 4 again. At this time, the ring saw can be pulled out of the pentagonal sleeve 5; loosen the clamping ring 4 to make the ring saw handle in the initial state, and then the ring saw and the ring saw handle constitute two separate independent components.

[0030] The trephine protection sleeve includes a sleeve 8 with a hollow, spade-shaped structure at the end. A gourd-shaped handle 7 is located at the top of the sleeve 8. The handle 7 has a keyway-shaped channel. The trephine protection sleeve can fix the target tissue position. The trephine then passes through the trephine protection sleeve channel to operate. The entire device is made of metal.

[0031] The installation process of the utility model is as follows: press the clamp ring 4 of the ring saw handle to connect the pentagonal sleeve 5 of the ring saw handle and the pentagonal joint 6 of the ring saw, and then the sleeve 8 of the ring saw protection sleeve passes through the saw head 10 and the inner tube 9 of the ring saw to complete the assembly of the device.

[0032] Example 2

[0033] See also Figure 5 , an orthopedic ring saw, the only difference from Example 1 is that the marble 11 is set in a stepped hole on the inner wall of the pentagonal sleeve 5 and penetrates the inner wall of the pentagonal sleeve 5.

Claims

1. An orthopedic trephine, comprising a hollow trephine, the trephine comprising an inner tube, one end of the inner tube being provided with a saw head, the other end of the inner tube being provided with a pentagonal joint, characterized in that: The end of the saw head is provided with a circular closed-loop structure with multiple uniform wavy continuous teeth. By holding the horizontal handle of the ring saw, it can be rotated continuously in the forward or reverse rotation direction, and at the same time drive the ring saw head in the same direction to perform spiral precise removal of target tissue, thereby minimizing the resistance generated during cutting or correction; the interface at one end of the pentagonal joint of the ring saw is connected to the pentagonal sleeve of the ring saw handle; the ring saw handle includes a clamping ring, the inner wall of the clamping ring is provided with a pentagonal sleeve, and the outer side of the pentagonal sleeve is provided with a spring; the pentagonal sleeve is used in conjunction with the clamping ring to fix or release the ring saw; a ring saw protection sleeve is provided on the outer side of the ring saw, and the ring saw protection sleeve includes a sleeve, which can determine the position of the target tissue, and the ring saw works by passing through the ring saw protection sleeve channel.

2. The orthopedic trephine according to claim 1, characterized in that: The ring saw comprises a pentagonal joint arranged at the other end of the inner tube. The pentagonal joint is a pentagonal prism, and the pentagonal prism is provided with an annular bayonet.

3. The orthopedic trephine according to claim 2, characterized in that: The inner wall of the pentagonal sleeve is provided with a pentagonal through hole, and a circular through hole is provided at the rear of the pentagonal through hole.

4. The orthopedic trephine according to claim 3, characterized in that: The ring saw handle includes a pressable reset clamp ring, a pentagonal sleeve is provided on the inner wall of the clamp ring, and a marble is provided on the inner wall of the pentagonal sleeve. The marble cooperates with the clamp ring to lock or loosen the pentagonal joint of the ring saw, thereby fixing or loosening the ring saw.

5. The orthopedic trephine according to claim 4, characterized in that: A ring saw protection sleeve is provided on the outer side of the ring saw, and a hollow shovel-shaped structure is provided at the end of the sleeve.

6. The orthopedic trephine according to claim 5, characterized in that: A gourd-shaped handle is provided on the top of the sleeve, and a groove-shaped channel is provided on the gourd-shaped handle.

7. The orthopedic trephine according to claim 6, characterized in that: The sleeve can determine the location of the target tissue through the hollow shovel-shaped and groove-shaped channels therein, and the ring saw works by passing through the ring saw protection sleeve channel.

8. The orthopedic trephine according to claim 7, characterized in that: The ring saw, the ring saw handle and the sleeve are all made of metal materials.

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