An instrument for small arthroscopic bone grafting

Abstract

The present invention discloses an instrument for bone grafting under small arthroscopy. The present invention provides an instrument for bone grafting under small arthroscopy, which can standardize the bone grafting steps, quantify the amount of bone grafting, pressurize the bone grafting quality in advance, and make the bone grafting process less prone to complications, short time consumption, and high efficiency. The present invention comprises an insertion accessory (1) and a bone grafting accessory (2). The insertion accessory (1) is used to insert into the bone defect of the joint space and open a channel for the bone grafting accessory (2) to be inserted. The bone grafting accessory (2) is used to pressurize the bone and send it into the bone defect through the channel opened by the insertion accessory (1); the bone grafting accessory (2) is provided with an adjustment unit (23) for adjusting the amount of bone carried by the bone grafting accessory (2). The present invention is suitable for bone grafting under small arthroscopy.

Description

[Technical field]

[0001] The invention relates to the technical field of medical equipment, and in particular to an instrument for bone grafting under small arthroscopy. [Background technology]

[0002] Bone grafting is the process of transplanting bone tissue into a patient's body where there is a bone defect or where reinforcement or fusion is needed. With the continuous development of endoscopic technology, arthroscopic surgery has become a routine diagnostic and treatment method in joint surgery. Through arthroscopy, the internal structure of the joint can be directly observed to determine the location, type, severity of meniscus injury, and whether there are any associated injuries, which significantly improves the accuracy of clinical diagnosis and provides a reference for choosing the appropriate surgical method.

[0003] For small joint bone diseases such as scaphoid nonunion and lunate cyst, minimally invasive treatment is currently used under arthroscopy, and one of the key steps is to fill the bone under arthroscopy. However, the bone grafting instruments used in the existing arthroscopic bone grafting surgery are relatively simple, and the arthroscopic outer sleeve and trocar or Kirschner wire are generally used for bone grafting. The process is: first insert the arthroscopic outer sleeve and the matching trocar into the joint, pull out the trocar, align the bone grafting site under the microscope, put the cancellous bone particles into the arthroscopic outer sleeve through curved forceps, and use a Kirschner wire that is slightly thinner than the trocar to push it to the bone grafting site in the joint. The bone grafting process has the following disadvantages: 1. Only a little bone can be put in each time. If there is too much bone, it is easy to get stuck in the trocar and it is not easy to push out, so the efficiency is low. The force is not easy to control when pushing out, and it is easy for bone to fall into other gaps in the joint. 2. Bone grafting cannot be performed with one hand under arthroscopic monitoring. 3. If bone is stuck in the trocar, it needs to be removed and cleaned again, and then the bone grafting process is repeated, which takes a long time. 4. The bone grafting is scattered, and the amount of bone grafting is unknown after bone grafting, so the amount of bone grafting cannot be effectively evaluated.

[0004] The present invention is made based on this situation. [Summary of the invention]

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an instrument for small arthroscopic bone grafting that can standardize bone grafting steps, quantify and calculate the amount of bone grafting, pressurize the bone grafting quality in advance, make the bone grafting process less prone to complications, shorten the time and increase the efficiency.

[0006] The present invention is achieved through the following technical solutions:

[0007] An instrument for bone grafting under small arthroscopy comprises an insertion accessory and a bone grafting accessory. The insertion accessory is used to be inserted into a bone defect in a joint space and to open a channel for the bone grafting accessory to be inserted. The bone grafting accessory is used to pressurize bone and send it into the bone defect through the channel opened by the insertion accessory. The bone grafting accessory is provided with an adjustment unit for adjusting the amount of bone carried by the bone grafting accessory.

[0008] As described above, an instrument for bone grafting under small arthroscopy, the insertion accessory includes a first sleeve for inserting into the joint space, the first sleeve is a hollow tube; the bone grafting accessory includes a second sleeve for temporarily storing bone, and a second sleeve needle for inserting into the second sleeve to compress and eject the bone therein, the second sleeve is a hollow tube and can be inserted into the first sleeve; the adjustment unit includes a plurality of different slots arranged at the tail of the second sleeve, and a limiting handle arranged at the tail of the second sleeve needle that can be inserted into the slots, and different slots have different axial lengths.

[0009] As described above, an instrument for bone grafting under small arthroscopy, each of the slots extends from the rear end surface of the second sleeve to the front end in the axial direction, and different slots extend axially to the front end by different lengths; and each of the slots penetrates from the inside of the second sleeve to its outer surface in the radial direction; each of the slots is distributed circumferentially along the axis of the second sleeve; when the limit handle is inserted into different slots, the front end of the second sleeve needle is inserted into the second sleeve to different depths, and different lengths of gaps for bone storage will be left inside the front end of the second sleeve, and the different lengths of the gaps correspond to different bone grafting lengths.

[0010] In the instrument for bone grafting under small arthroscopy as described above, at least one of the slots corresponds to a bone graft length of zero, and the other slots correspond to bone graft lengths greater than zero.

[0011] In the instrument for small arthroscopic bone grafting as described above, the front end of the second trocar is in the shape of a concave surface.

[0012] In the instrument for small arthroscopic bone grafting as described above, the insertion accessory also includes a first trocar, which is rod-shaped and used to be inserted into the first sleeve and support the first sleeve during the insertion of the first sleeve into the joint space.

[0013] In the instrument for small arthroscopic bone grafting as described above, the front end of the first trocar is in an outwardly convex hemispherical shape.

[0014] In the instrument for small arthroscopic bone grafting as described above, the first sleeve tail, the first sleeve needle tail and the second sleeve tail all include an operating handle for convenient hand-holding.

[0015] In the instrument for small arthroscopic bone grafting as described above, the first sleeve tail portion and the second sleeve tail portion both include a limiting tail seat with a diameter larger than that of the front tubular portion thereof.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The present invention is an instrument for bone grafting under small arthroscopy, including an insertion accessory and a bone grafting accessory, in the form of a double cannula plus a trocar; the bone grafting accessory is provided with an adjustment unit for adjusting the amount of bone carried by the bone grafting accessory, and the adjustment unit adjusts the amount of bone grafting by cooperating between a limit handle and slots of different lengths. The bone grafting accessory can pre-pressurize the cancellous bone into bone strips, which can effectively evaluate the amount of bone grafting, avoid problems such as loose bone falling and bone jam; and control the amount of bone implantation through the adjustment unit, standardize the operation, and reduce the operation time and surgical complications; when multiple bone grafting is required or the amount of bone grafting is large, multiple bone grafting accessories carrying bone can be prepared in advance before the operation, which will make the bone grafting operation simple, fast and accurate.

[0018] 2. The second trocar of the present invention is a concave end, because its inward concave surface will squeeze the bone it contacts toward the center of the concave surface instead of squeezing the bone outward, thus avoiding the bone being squeezed between the second trocar and the inner wall of the second cannula, thereby preventing the bone from being stuck. Such a concave design also has the advantages of high efficiency and easy control of force during pushing.

Brief Description of the Drawings

[0019] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0021] Figure 2 is a schematic diagram of a first sleeve of the present invention;

[0022] Figure 3 is a schematic diagram of a first trocar of the present invention;

[0023] Figure 4 is a schematic diagram of a second sleeve of the present invention;

[0024] Figure 5 is a schematic diagram of a second trocar of the present invention;

[0025] Figure 6 yes Figure 5A is an enlarged schematic diagram. [Specific implementation method]

[0026] The present invention will be further described below in conjunction with the accompanying drawings:

[0027] like Figures 1 to 6 The device for bone grafting under small arthroscopy shown in the figure comprises an insertion accessory 1 and a bone grafting accessory 2. The insertion accessory 1 is used to be inserted into the bone defect of the joint space and to open a channel for the insertion of the bone grafting accessory 2. The bone grafting accessory 2 is used to pressurize the bone and send it into the bone defect through the channel opened by the insertion accessory 1. The bone grafting accessory 2 is provided with an adjustment unit 23 for adjusting the amount of bone carried by the bone grafting accessory 2. The bone grafting accessory 2 can pressurize the cancellous bone into bone strips in advance, which can effectively evaluate the amount of bone grafting and avoid problems such as loose bone falling and bone jam. The amount of bone implantation can be controlled by the adjustment unit 23, the operation is standardized, and the operation time and surgical complications are reduced. When multiple bone graftings are required or the amount of bone grafting is large, multiple bone grafting accessories 2 carrying bone can be prepared in advance before the operation, which will make the bone grafting operation simple, fast and accurate.

[0028] Specifically, the insertion accessory 1 includes a first sleeve 11 for inserting into the joint gap, and the first sleeve 11 is a hollow tube; the bone grafting accessory 2 includes a second sleeve 21 for temporarily storing bone, and a second sleeve needle 22 for inserting the second sleeve 21 to press and eject the bone therein, the second sleeve 21 is a hollow tube and the second sleeve 21 can be inserted into the first sleeve 11; the adjustment unit 23 includes a plurality of different slots 211 provided at the tail of the second sleeve 21, and a limiting handle 221 provided at the tail of the second sleeve needle 22 that can be inserted into the slot 211, and different slots 211 have different axial lengths. This bone implant structure adopts a double-cannula plus a trocar structure. The second cannula 21 is used to temporarily store the bone to be implanted. The cooperation between the limit handle 221 and the different slots 211 can adjust the amount of bone temporarily stored in the second cannula 21. During bone implantation, the first cannula 11 is inserted into the joint gap, the second cannula needle 22 is inserted into the second cannula 21, and the second cannula 21 is inserted into the first cannula 11. The second cannula needle 22 can push out the bone temporarily stored in the second cannula 21 and push it into the bone defect in the joint gap. In addition, this structure is simple and easy to operate, and the bone implantation operation can be performed with one hand during the operation.

[0029] Of course, the length of the second cannula 21 is slightly greater than or equal to the length of the first cannula 11 , and the length of the second trocar 22 is less than or equal to the length of the second cannula 21 .

[0030] Specifically, each of the slots 211 extends from the rear end of the second sleeve 21 to the front end in the axial direction, and different slots 211 extend axially to the front end by different lengths; and each of the slots 211 penetrates from the inside of the second sleeve 21 to its outer surface in the radial direction; each of the slots 211 is distributed circumferentially along the axis of the second sleeve 21; when the limit handle 221 is inserted into different slots 211, the front end of the second sleeve needle 22 is inserted into the second sleeve 21 at different depths, and different lengths of gaps for storing bones are left inside the front end of the second sleeve 21, and the spongy bone is filled into the gap with curved forceps and pressed into bone strips; the gaps of different lengths correspond to different bone grafting lengths. In this way, the limit handle 221 can be selected to be inserted into different slots 211 according to different predetermined bone grafting amounts, and the amount of bone grafting can be accurately evaluated during surgery.

[0031] Specifically, at least one of the slots 211 has a bone graft length of zero, and the other slots 211 have bone graft lengths greater than zero. During surgery, the limit handle 221 inserted into the other slots 211 is switched and inserted into the slot 211 corresponding to the bone graft length of zero, so that all the bone in the second sleeve 21 can be pushed out.

[0032] Specifically, the front end of the second trocar 22 is in the shape of a concave surface. The second trocar 22 is a concave end because its concave surface will squeeze the bone it contacts toward the center of the concave surface instead of squeezing the bone outward, thus avoiding the bone being squeezed between the second trocar 22 and the inner wall of the second cannula 21, thereby causing bone jam. Such a concave surface design also has the advantages of high efficiency and easy control of force during pushing.

[0033] Specifically, the insertion accessory 1 further includes a first trocar 12, which is rod-shaped and is used to be inserted into the first trocar 11 and to support the first trocar 11 during the insertion of the first trocar 11 into the joint gap. The first trocar 12 is inserted into the first trocar 11, and the two are inserted into the joint gap together, so that the first trocar 11 can be inserted into the joint more easily; with the first trocar 12 as an inner support, the first trocar 11 is not easily deformed by the bone when inserted into the joint.

[0034] Specifically, the front end of the first trocar 12 is in a convex hemispherical shape, so that the first trocar 12 is easier to insert into the first cannula 11.

[0035] Specifically, the tail of the first sleeve 11, the tail of the first trocar 12 and the tail of the second sleeve 21 all include an operating handle 111 for convenient hand-holding. Because the bone grafting operation needs to be operated by hand, the operating handle 111 is for convenient hand-holding.

[0036] Specifically, the tail of the first sleeve 11 and the tail of the second sleeve 21 both include a limit tail seat 112 with a diameter larger than the diameter of the front tubular portion thereof. The limit tail seat 112 is used to limit the maximum insertion depth of the first sleeve 11 or the second sleeve 21, and also has the function of facilitating hand holding.

[0037] The bone grafting operation steps of the present invention are as follows:

[0038] Step 1: first insert the first trocar 12 into the first trocar 11, then insert the two together into the bone defect in the joint space, and then pull out the first trocar 12 to prepare for bone grafting;

[0039] Step 2: insert the second trocar 22 into the second sleeve 21, and insert the limit handle 221 into the corresponding slot 211 according to the predetermined bone graft length. There will be a gap of corresponding depth at the front end of the second sleeve 21, and then use curved forceps to fill the spongy bone into the gap and press it tightly.

[0040] Step 3: insert the second sleeve 21 together with the second trocar 22 therein into the first sleeve 11, and then insert the limit handle 221 into the corresponding slot 211 with a zero bone graft length, that is, use the second trocar 22 to push the bone strip into the bone defect in the joint space, and then pull out the second sleeve 21 and the second trocar 22 after completion; if multiple bone grafting is required, repeat steps 2 and 3;

[0041] Step 4: Pull out the first sleeve 11 to complete the bone grafting.

[0042] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An instrument for small arthroscopic bone grafting, characterized in that: The invention comprises an insertion accessory (1) and a bone grafting accessory (2), wherein the insertion accessory (1) is used to be inserted into a bone defect in a joint space and to open a channel for inserting the bone grafting accessory (2), and the bone grafting accessory (2) is used to pressurize bone and then deliver it into the bone defect through the channel opened by the insertion accessory (1); the bone grafting accessory (2) is provided with an adjustment unit (23) for adjusting the amount of bone carried by the bone grafting accessory (2); The insertion accessory (1) comprises a first sleeve (11) for inserting into a joint gap, the first sleeve (11) being in a hollow tubular shape; the bone grafting accessory (2) comprises a second sleeve (21) for temporarily storing bone, and a second sleeve needle (22) for inserting into the second sleeve (21) to compress and eject the bone therein, the second sleeve (21) being in a hollow tubular shape and capable of being inserted into the first sleeve (11); the adjustment unit (23) comprises a plurality of different slots (211) provided at the rear of the second sleeve (21), and a limit handle (221) provided at the rear of the second sleeve needle (22) capable of being inserted into the slots (211), and the different slots (211) have different axial lengths; The bone graft length corresponding to at least one of the slots (211) is zero, and the bone graft lengths corresponding to the other slots (211) are greater than zero; and the length of the second sleeve (21) is slightly greater than or equal to the length of the first sleeve (11).

2. The instrument for small arthroscopic bone grafting according to claim 1, characterized in that: Each of the slots (211) extends from the rear end surface of the second sleeve (21) to the front end in the axial direction, and different slots (211) extend axially to the front end by different lengths; and each of the slots (211) penetrates from the inside of the second sleeve (21) to its outer surface in the radial direction; each of the slots (211) is distributed circumferentially along the axis of the second sleeve (21); when the limit handle (221) is inserted into different slots (211), the front end of the second sleeve needle (22) is inserted into the second sleeve (21) to different depths, and different lengths of gaps for storing bones are reserved inside the front end of the second sleeve (21), and the different lengths of the gaps correspond to different bone grafting lengths.

3. The instrument for small arthroscopic bone grafting according to claim 1, characterized in that: The front end of the second trocar (22) is in the shape of a concave surface.

4. The instrument for small arthroscopic bone grafting according to claim 1, characterized in that: The insertion accessory (1) further comprises a first trocar (12), wherein the first trocar (12) is rod-shaped and is used for being inserted into the first cannula (11) and supporting the first cannula (11) during the process of inserting the first cannula (11) into the joint space.

5. The instrument for small arthroscopic bone grafting according to claim 4, characterized in that: The front end of the first trocar (12) is in the shape of a hemispherical protrusion.

6. The instrument for small arthroscopic bone grafting according to claim 4, characterized in that: The tail of the first cannula (11), the tail of the first trocar (12) and the tail of the second cannula (21) all comprise an operating handle (111) for convenient hand-holding.

7. The instrument for small arthroscopic bone grafting according to claim 1, characterized in that: The tail portion of the first sleeve (11) and the tail portion of the second sleeve (21) both comprise a portion of a limiting tail seat (112) having a diameter larger than that of the front tubular portion thereof.

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