Spinal tumor puncture device

Abstract

The utility model discloses a kind of spinal tumor puncture devices, belong to medical instrument technical field, the spinal tumor puncture device includes dilator, ring saw, divider and first push rod, wherein: ring saw includes ring saw main body and the first handle located above ring saw main body, first passageway is equipped on ring saw vertically through, the lower end of ring saw main body is equipped with sawtooth;Divider includes the divider main body that can be inserted into first passageway and the second handle located above divider main body, second passageway is equipped on divider vertically through, the lower side of divider main body is equipped with slot, the lower side of divider main body is equipped with the first blade edge of vertically extending in the side edge of slot close to;First push rod includes the first push rod main body that can be inserted into second passageway and the third handle located above first push rod main body.The utility model is convenient for sampling to hardened bone and non-hardened bone, sampling is sufficient, and it is easy to puncture, amount of bleeding is less, and tissue damage is small.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a spinal tumor puncture device. Background Technology

[0002] Spinal tumors refer to primary and secondary tumors occurring in the spine. The overall incidence of primary spinal tumors is approximately 0.4%. The vast majority of spinal tumors in adolescents are benign, while those in middle-aged and young adults are more likely to be malignant. Benign tumors often involve posterior structures, while malignant tumors often involve the vertebral bodies. Primary benign spinal tumors generally progress slowly and have a long course; malignant spinal tumors progress more rapidly, have a shorter course, and present with clinical symptoms more quickly, accounting for approximately 10% of newly diagnosed malignant bone tumors each year. As a common orthopedic condition, accurate diagnosis of spinal (bone) tumors is crucial for treatment and patient prognosis. Currently, biopsy for pathological diagnosis is one of the most important examinations for confirming spinal tumors.

[0003] Because of the deep location of the vertebral body, surrounded by important nerves, blood vessels, and abundant muscles, open surgery for biopsy is highly invasive. Percutaneous biopsy via a narrow pedicle or extrapedicle approach is less invasive and avoids damage to the spinal cord, nerves, and surrounding blood vessels. Therefore, the key to surgical success lies in using simple and precise tools to puncture the diseased vertebral body and achieving multiple biopsies to improve the positive rate of clinical diagnosis. Clinically, commonly used bone biopsy needles are mostly designed for superficial biopsies of the sternum, iliac bone, etc., employing a single puncture needle. The surgeon roughly locates the site by palpation before the procedure, and then punctures and collects the sample after anesthesia. Subsequently, biopsy needles specifically designed for vertebral body biopsy have also emerged, also using a single puncture needle, with a principle similar to that of ordinary bone biopsy needles.

[0004] While these biopsy needles can perform the surgery, they still have at least the following drawbacks: for some patients, such as those with severe bone destruction or relatively low bone content, or those with significant sclerosis, it may be impossible to remove the lesion. Utility Model Content

[0005] The technical problem to be solved by this invention is to provide a spinal tumor puncture device that is convenient and sufficient for sampling both sclerotic and non-sclerotic bone.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A spinal tumor puncture device includes an expander, a trephine, a segmenter, and a first push rod, wherein:

[0008] The ring saw includes a ring saw body and a first handle located above the ring saw body. The ring saw has a vertical through-hole and the lower end of the ring saw body has saw teeth.

[0009] The divider includes a divider body that can be inserted into the first channel and a second handle located above the divider body. The divider has a vertically penetrating second channel, and the lower side of the divider body has a slot. The lower edge of the divider body near the slot has a vertically extending first cutting edge.

[0010] The first push rod includes a first push rod body that can be inserted into the second channel and a third handle located above the first push rod body.

[0011] Furthermore, the upper part of the ring saw body is provided with a scale;

[0012] And / or, each tooth of the saw teeth includes a vertical side and a diagonal side, and the included angle between the vertical side and the diagonal side is 45-80 degrees;

[0013] And / or, each tooth of the saw teeth includes two symmetrically arranged oblique sides, the included angle between the two oblique sides being 70-110 degrees;

[0014] And / or, the lower inner side of the ring saw body is provided with a barb extending circumferentially above the saw teeth;

[0015] And / or, the first handle is made of plastic and is injection molded to the body of the ring saw;

[0016] And / or, the first handle has a connector post at the upper center and the second handle has a connector groove at the lower center that mates with the connector post.

[0017] Furthermore, the second handle is cylindrical, and the upper center of the first handle is provided with a receiving groove for accommodating the second handle, and the outer surface of the second handle is provided with a limiting surface that cooperates with the inner sidewall of the receiving groove.

[0018] Furthermore, the lower end of the divider body is provided with a laterally extending hook below the first cutting edge, and the edge of the hook is provided with a second cutting edge.

[0019] And / or, the second handle is made of plastic and is injection molded to the body of the divider.

[0020] Furthermore, the expander includes an expander body and a fourth handle located above the expander body. The expander has a vertically penetrating third channel, into which the ring saw body can be inserted. After sampling is completed, a sealing material is placed in the third channel.

[0021] Furthermore, the expander body is provided with graduations;

[0022] And / or, the fourth handle is made of plastic and is injection molded to the expander body.

[0023] Furthermore, the spinal tumor puncture device also includes a circuit opener, which includes a circuit opener body that can be inserted into the third channel and a fifth handle located above the circuit opener body. The lower end of the circuit opener body is provided with a third cutting edge.

[0024] Furthermore, the fifth handle has a receiving groove at its lower center for accommodating the fourth handle, wherein:

[0025] The upper middle part of the fourth handle is provided with a mating groove, and the receiving groove is provided with a mating cylinder that mates with the mating groove;

[0026] And / or, the upper end of the fourth handle is provided with limiting holes on both sides, and the receiving groove is provided with limiting posts that cooperate with the limiting holes;

[0027] And / or, the fourth handle is provided with limiting blocks on both sides, and the edge of the receiving groove is provided with a limiting groove that cooperates with the limiting blocks.

[0028] Furthermore, the circuit breaker body is provided with a scale;

[0029] And / or, the third cutting edge is triangular;

[0030] And / or, the fifth handle is made of plastic and is injection molded to the circuit breaker body.

[0031] Furthermore, the spinal tumor puncture device also includes a second push rod for pushing the occluder in the dilator into the puncture notch, the second push rod including a second push rod body capable of being inserted into the third channel and a sixth handle located above the second push rod body.

[0032] This utility model has the following beneficial effects:

[0033] This invention relates to a spinal tumor puncture device, comprising an expander, a ring saw, a divider, and a first pusher. The ring saw is suitable for sampling relatively dense bone, while the divider is suitable for sampling relatively porous bone. For sclerotic bone, the ring saw and divider can be used sequentially for sampling; for non-sclerotic bone, only the divider can be used. After sampling, the first pusher can be inserted into the first channel of the ring saw or the second channel of the divider to expel bone or tissue. Furthermore, the divider includes a divider body with a groove on its lower side and a vertically extending first cutting edge on the lower edge of the divider body near the groove. This allows the divider to scrape bone within a certain vertical space, ensuring sufficient sampling. Existing technologies typically lack dilatation tools, making it difficult to reach the vertebral body through the narrow pedicles, or requiring force for successful puncture, resulting in significant tissue damage and causing considerable pain and discomfort for patients under local anesthesia. This invention incorporates an expander, effectively addressing these issues. Therefore, this invention facilitates sampling of both sclerotic and non-sclerotic bone, ensuring sufficient sampling, easy puncture, minimal bleeding, and minimal tissue damage. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the spinal tumor puncture device of this utility model;

[0035] Figure 2 for Figure 1 Schematic diagram of the combined structure of the central ring saw, the divider, the first push rod, and the expander;

[0036] Figure 3 for Figure 1 A schematic diagram of the combined structure of the ring saw, the divider and the first push rod, where (a) is a front view and (b) is a side sectional view;

[0037] Figure 4 for Figure 1 A schematic diagram of the structure of a ring saw, where (a) is a front view and (b) is a side sectional view;

[0038] Figure 5 for Figure 4 Enlarged view of the lower end of the ring saw, where (a) shows one saw tooth structure, (b) shows another saw tooth structure, and (c) shows the inner structure of the lower end of the ring saw;

[0039] Figure 6 for Figure 1 A schematic diagram of the structure of the divider, wherein (a) is a front view, (b) is a side sectional view and an enlarged view of the lower end of the divider is also shown;

[0040] Figure 7 for Figure 1 A schematic diagram of the combined structure of the expander and the opener, where (a) is a front view and (b) is a side sectional view;

[0041] Figure 8 for Figure 1 A schematic diagram of the structure of the expansion device, where (a) is a front view and (b) is a side sectional view;

[0042] Figure 9 for Figure 1 A schematic diagram of the structure of the intermediate frequency circuit breaker;

[0043] Figure 10 for Figure 1 A schematic diagram of the combined structure of the middle expander and the second push rod. Detailed Implementation

[0044] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0045] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] This invention provides a spinal tumor puncture device, such as... Figure 1-10 As shown, it includes an expander 4, a ring saw 1, a divider 2, and a first push rod 3, wherein:

[0047] The ring saw 1 includes a ring saw body 11 and a first handle 12 located above the ring saw body 11. The ring saw 1 has a vertical through first channel 13 and a saw tooth 14 at the lower end of the ring saw body 11.

[0048] The divider 2 includes a divider body 21 that can be inserted into the first channel 13 and a second handle 22 located above the divider body 21. The divider 2 is provided with a vertically penetrating second channel 23. The lower side of the divider body 21 is provided with a slot 24. The lower edge of the divider body 21 near the slot 24 is provided with a vertically extending first cutting edge 25.

[0049] The first push rod 3 includes a first push rod body 31 that can be inserted into the second channel 23 and a third handle 32 located above the first push rod body 31.

[0050] In this invention, the ring saw 1 and the divider 2 are used for straight sampling. The ring saw 1 is suitable for sampling relatively dense bone / tissue (though it can also sample relatively loose bone / tissue), while the divider 2 is suitable for sampling relatively loose bone / tissue. For sclerotic bone, the ring saw 1 and the divider 2 can be used sequentially for sampling. Specifically, during surgery, a working channel reaching the vicinity of the vertebral lesion can first be established on the narrow pedicle using the expander 4. Then, the ring saw 1 is inserted into the working channel to break up the bone before sampling. During sampling, the ring saw is rotated 180 degrees left and right and then removed. If the sample volume is insufficient, the divider 2 is inserted into the bottom of the first channel 13 of the ring saw 1, and the ring saw is rotated 180 degrees left and right before being removed. For non-sclerotic bone, only the divider 2 can be used for sampling, i.e., the divider 2 is directly inserted into the working channel, rotated 180 degrees left and right, and then removed. After sampling, the first pusher 3 can be inserted into the first channel 13 of the ring saw 1 or the second channel 23 of the divider 2 to push out the bone or tissue.

[0051] This invention relates to a spinal tumor puncture device, comprising an expander, a ring saw, a divider, and a first pusher. The ring saw is suitable for sampling relatively dense bone, while the divider is suitable for sampling relatively porous bone. For sclerotic bone, the ring saw and divider can be used sequentially for sampling; for non-sclerotic bone, only the divider can be used. After sampling, the first pusher can be inserted into the first channel of the ring saw or the second channel of the divider to expel bone or tissue. Furthermore, the divider includes a divider body with a groove on its lower side and a vertically extending first cutting edge on the lower edge of the divider body near the groove. This allows the divider to scrape bone within a certain vertical space, ensuring sufficient sampling. Existing technologies typically lack dilatation tools, making it difficult to reach the vertebral body through the narrow pedicles, or requiring force for successful puncture, resulting in significant tissue damage and causing considerable pain and discomfort for patients under local anesthesia. This invention incorporates an expander, effectively addressing these issues. Therefore, this invention facilitates sampling of both sclerotic and non-sclerotic bone, ensuring sufficient sampling, easy puncture, minimal bleeding, and minimal tissue damage.

[0052] like Figure 4 As shown, the upper part of the ring saw body 11 of the ring saw 1 may be provided with a scale 111 to facilitate identification of the insertion depth of the ring saw body 11.

[0053] To facilitate sampling, the saw teeth 14 at the lower end of the ring saw body 11 can have the following structural forms:

[0054] Structural Form 1

[0055] like Figure 5 As shown in (a), each tooth of the serration 14 includes a vertical side and a diagonal side, with an angle α between the vertical side and the diagonal side of 45-80 degrees, which facilitates the circumduction of relatively hard bone and allows for a considerable sample volume.

[0056] Structural Form Two

[0057] like Figure 5 As shown in (b), each tooth of the serration 14 includes two symmetrically arranged oblique sides, and the included angle β between the two oblique sides is 70-110 degrees, which facilitates the circumferential harvesting of soft tissue.

[0058] Furthermore, such as Figure 5 As shown in (c), a barb 15 extending circumferentially may be provided on the inner side of the lower end of the ring saw body 11 above the saw teeth 14, which facilitates better removal of bone or soft tissue.

[0059] The first handle 12 can be made of plastic, and is a single-use unit. It is injection molded to the ring saw body 11, resulting in a strong and low-cost connection, facilitating large-scale single-use. The first channel 13 allows the divider body 21 to extend into it, and can also be used as a storage space for the circumcised bone.

[0060] like Figure 3-6 As shown, to facilitate the assembly of the ring saw 1 and the divider 2, a connector post 121 can be provided at the upper center of the first handle 12 of the ring saw 1, and a connector groove 221 that mates with the connector post 121 is provided at the lower center of the second handle 22 of the divider 2, facilitating the assembly of the first handle 12 and the second handle 22, so that the ring saw 1 and the divider 2 can be assembled together. Furthermore, the second handle 22 can be columnar, and a receiving groove 122 for accommodating the second handle 22 is provided at the upper center of the first handle 12. The outer surface of the second handle 22 is provided with a limiting surface (specifically, several cutting planes) that mates with the inner sidewall of the receiving groove 122, thus making the assembly of the first handle 12 and the second handle 22 more secure.

[0061] like Figure 6 As shown, the lower end of the main body 21 of the divider 2 can be provided with a laterally extending hook below the first cutting edge 25. The edge of the hook is provided with a second cutting edge 26. The sharp design of the first cutting edge 25 and the second cutting edge 26 facilitates the removal of soft tissue. The special design of the second cutting edge 26 (similar to a hook) facilitates the extraction of soft tissue, and can bring out tumor lesions similar to soft tissue. Experiments have shown that the sample volume is considerable and the sampling effect is good. The second handle 22 can be made of plastic and is injection molded to the main body 21 of the divider, which is a firm connection and low cost, and is convenient for large-scale single use. The second channel 23 can facilitate the insertion of the first push rod body 31, and can also be used as a storage space for the circumferentially extracted tissue.

[0062] like Figure 7-9As shown, the expander 4 preferably includes an expander body 41 and a fourth handle 42 located above the expander body 41. The expander 4 is provided with a vertically penetrating third channel 43, and the ring saw body 11 can be inserted into the third channel 43. After sampling, a sealing material can be provided in the third channel 43 to block the puncture gap.

[0063] In this way, when used during the operation, the dilator 4 can be used as a guiding device, which can solve the problem of needing multiple X-rays to determine the puncture location during the operation, prolonging the operation time, increasing the amount of bleeding during the operation, increasing the surgical risk, and causing patients and doctors to be exposed to the X-ray radiation environment multiple times, which affects the health of patients and doctors.

[0064] The expander body 41 may be provided with a scale 411 to facilitate identification of the depth to which the expander body 41 enters the human body; the fourth handle 42 may be made of plastic and be injection molded to the expander body 41, which is a strong connection and low cost, and is convenient for large-scale disposable use.

[0065] In addition, the spinal tumor puncture device may also include a circuit opener 5, which includes a circuit opener body 51 that can be inserted into the third channel 43 and a fifth handle 52 located above the circuit opener body 51. The lower end of the circuit opener body 51 is provided with a third cutting edge 53.

[0066] During the procedure, the initiator 5 and dilator 4 can be used together to open the incision and establish a channel in the early stages of the puncture surgery. Specifically, the initiator 5 and dilator 4 can reach the vicinity of the vertebral lesion through the narrow pedicle to establish a working channel. Afterward, the initiator 5 is removed, leaving the dilator 4 for use as the channel. The initiator 5 and dilator 4 have relatively small diameters, resulting in less bleeding and less tissue damage.

[0067] To facilitate the combination of the circuit breaker 5 and the expander 4, a receiving groove 521 for accommodating the fourth handle 42 of the expander 4 can be provided in the lower center of the fifth handle 52 of the circuit breaker 5, wherein:

[0068] The upper middle part of the fourth handle 42 is provided with a mating groove 421, and the receiving groove 521 is provided with a mating cylinder 522 that mates with the mating groove 421;

[0069] And / or, the upper end of the fourth handle 42 is provided with limiting holes (not shown) on both sides, and the receiving groove 521 is provided with limiting pins 523 that cooperate with the limiting holes;

[0070] And / or, the fourth handle 42 is provided with limiting blocks 422 on both sides, and the edge of the receiving groove 521 is provided with limiting grooves 524 that cooperate with the limiting blocks 422;

[0071] In this way, through the above-mentioned various combinations, the fourth handle 42 and the fifth handle 52 can be firmly combined, making it easy for the expander 4 and the circuit breaker 5 to be fixed together for use.

[0072] The circuit breaker body 51 may have a scale 511 to facilitate identification of the depth to which the circuit breaker body 51 enters the human body. The third cutting edge 53 may be triangular, with a sharp edge, making it easier to pierce. The fifth handle 52 may be made of plastic and injection molded to the circuit breaker body 51, providing a strong connection and low cost, facilitating large-scale disposable use.

[0073] After sampling, to prevent tissue leakage from the lesion, a sealing agent can be used to plug the opening. Therefore, such as... Figure 1 and Figure 10 As shown, the spinal tumor puncture device may also include a second push rod 6 for pushing the occluder (similar to gelatin sponge or bone wax) in the dilator 4 into the puncture notch. The second push rod 6 includes a second push rod body 61 that can be inserted into the third channel 43 of the dilator 4 and a sixth handle 62 located above the second push rod body 61.

[0074] During the procedure, after sampling is completed, the second push rod 6 can be used to pass the sealing material through the dilator 4 to block the gap left after sampling, thus completing the entire surgical operation.

[0075] The sixth handle 62 can be made of plastic and is injection molded to the second push rod body 61, which is a strong connection with low cost and is convenient for large-scale disposable use.

[0076] In summary, this utility model provides a complete set of tumor puncture tools, including a puncturist, dilator, ring saw, divider, push rod, etc., which has obvious advantages in surgical operation, with less bleeding during incision, less tissue damage, and a considerable sample volume.

[0077] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A spinal tumor puncture device, characterized in that, Includes an expander, a ring saw, a divider, and a first push rod, wherein: The ring saw includes a ring saw body and a first handle located above the ring saw body. The ring saw has a vertical through-hole and the lower end of the ring saw body has saw teeth. The divider includes a divider body that can be inserted into the first channel and a second handle located above the divider body. The divider has a vertically penetrating second channel, and the lower side of the divider body has a slot. The lower edge of the divider body near the slot has a vertically extending first cutting edge. The first push rod includes a first push rod body that can be inserted into the second channel and a third handle located above the first push rod body.

2. The spinal tumor puncture device according to claim 1, characterized in that, Each tooth of the saw includes a vertical side and a diagonal side, and the included angle between the vertical side and the diagonal side is 45-80 degrees; And / or, each tooth of the saw teeth includes two symmetrically arranged oblique sides, the included angle between the two oblique sides being 70-110 degrees; And / or, the lower inner side of the ring saw body is provided with a barb extending circumferentially above the saw teeth; And / or, the upper part of the ring saw body is provided with a scale; And / or, the first handle is made of plastic and is injection molded to the body of the ring saw; And / or, the first handle has a connector post at the upper center and the second handle has a connector groove at the lower center that mates with the connector post.

3. The spinal tumor puncture device according to claim 2, characterized in that, The second handle is cylindrical, and the upper center of the first handle is provided with a receiving groove for accommodating the second handle. The outer surface of the second handle is provided with a limiting surface that cooperates with the inner sidewall of the receiving groove.

4. The spinal tumor puncture device according to claim 1, characterized in that, The lower end of the divider body is provided with a laterally extending hook below the first cutting edge, and the edge of the hook is provided with a second cutting edge. And / or, the second handle is made of plastic and is injection molded to the body of the divider.

5. The spinal tumor puncture device according to any one of claims 1-4, characterized in that, The expander includes an expander body and a fourth handle located above the expander body. The expander has a vertically penetrating third channel, into which the ring saw body can be inserted. After sampling is completed, a sealing material is placed in the third channel.

6. The spinal tumor puncture device according to claim 5, characterized in that, The expander body is provided with graduations; And / or, the fourth handle is made of plastic and is injection molded to the expander body.

7. The spinal tumor puncture device according to claim 5, characterized in that, The spinal tumor puncture device also includes a circuit opener, which includes a circuit opener body that can be inserted into the third channel and a fifth handle located above the circuit opener body. The lower end of the circuit opener body is provided with a third cutting edge.

8. The spinal tumor puncture device according to claim 7, characterized in that, The fifth handle has a receiving groove at its lower center for accommodating the fourth handle, wherein: The upper middle part of the fourth handle is provided with a mating groove, and the receiving groove is provided with a mating cylinder that mates with the mating groove; And / or, the upper end of the fourth handle is provided with limiting holes on both sides, and the receiving groove is provided with limiting posts that cooperate with the limiting holes; And / or, the fourth handle is provided with limiting blocks on both sides, and the edge of the receiving groove is provided with a limiting groove that cooperates with the limiting blocks.

9. The spinal tumor puncture device according to claim 7, characterized in that, The circuit breaker body is equipped with a scale. And / or, the third cutting edge is triangular; And / or, the fifth handle is made of plastic and is injection molded to the circuit breaker body.

10. The spinal tumor puncture device according to claim 5, characterized in that, The spinal tumor puncture device also includes a second push rod for pushing the occluder in the dilator into the puncture notch, the second push rod including a second push rod body capable of being inserted into the third channel and a sixth handle located above the second push rod body.

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