Visual trephine

Abstract

The utility model relates to the technical field of surgical instruments, in particular to a visual trephine which comprises a trephine body and a tracker. The trephine body comprises a handle, a connecting rod and a trephine head which are connected in sequence, and the far end of the handle is fixedly connected with the near end of the connecting rod; the tracker comprises a reference frame, and a connecting sleeve is formed at the lower end of the reference frame; the far end of the connecting rod is detachably connected with the near end of the trephine head, and the connecting sleeve is detachably connected with the trephine body. According to the visual trephine, due to the fact that the trephine head is detachable relative to the connecting rod and the tracker is detachable relative to the trephine body, medical staff can flexibly choose to abandon the trephine head and retain the connecting rod of the trephine body and parts at the near end of the connecting rod after using the trephine. Or the trephine body is discarded, and only the tracker is reserved, so that the problem of waste of surgical instruments is solved, and the surgical cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical instruments, in particular to a visual ring saw. Background Art

[0002] Transforaminal endoscopic lumbar disc surgery has become one of the effective minimally invasive surgeries for the treatment of lumbar disc herniation, and the trephine is a commonly used surgical instrument in transforaminal endoscopic lumbar disc surgery, which can effectively remove bone tissue and has the advantages of less trauma, small incision, no need for muscle stripping, no need for excessive bone removal, little impact on the stability of the spine, fast recovery, and short hospitalization time. At present, the technology of transforaminal endoscopic lumbar disc surgery has basically matured and has achieved good clinical results in spinal decompression.

[0003] In order to ensure that the ring saw can accurately remove bone tissue, the existing technology usually combines the ring saw with various navigation technologies to monitor the working status of the ring saw in real time. When using the ring saw to cut bone tissue, some debris will adhere to the ring saw, causing residues to contaminate the ring saw, which is prone to cross infection. If the hidden danger cannot be completely eliminated by cleaning and disinfection, the contaminated old ring saw will be discarded and replaced with a new one to ensure cleanliness.

[0004] Due to the different degrees of contamination of the ring saw, in some cases only some parts need to be replaced, and in some cases the entire ring saw needs to be replaced. If the entire ring saw is discarded directly, it will lead to serious waste of surgical equipment, increase surgical costs, and increase the financial burden on patients. Utility Model Content

[0005] In order to improve the serious problem of surgical instrument waste, the present embodiment provides a visual ring saw, which can flexibly choose to discard parts or the ring saw body.

[0006] The embodiment of the utility model discloses a visual ring saw, comprising a ring saw body and a tracker;

[0007] The ring saw body comprises a handle, a connecting rod and a ring saw head which are connected in sequence, and the distal end of the handle is fixedly connected to the proximal end of the connecting rod; the tracker assembly comprises a reference frame, and a connecting sleeve is formed at the lower end of the reference frame;

[0008] The distal end of the connecting rod is detachably connected to the proximal end of the ring saw head, and the connecting sleeve is detachably connected to the ring saw body, so that the ring saw head and the ring saw body can be selectively discarded.

[0009] In some embodiments, a transition portion is formed between the handle and the connecting rod. A first step is formed between the proximal end of the transition portion and the distal end of the handle, and a second step is formed between the distal end of the transition portion and the proximal end of the connecting rod. The connecting sleeve is movably sleeved on the transition portion. The proximal end of the connecting sleeve is limited by the first step, and a limiting nut is provided at the distal end of the connecting sleeve for limiting.

[0010] In some embodiments, the limiting nut is screwed onto the transition portion from the distal end of the transition portion. A limiting ring is formed on the inner peripheral wall at the distal end of the limiting nut. The limiting ring cooperates with the second step to limit the tightening depth of the limiting nut.

[0011] In some embodiments, the head of the trephine is made of a metal material, and the handle and the connecting rod are made of plastics.

[0012] In some embodiments, the connecting rod and the head of the trephine are connected by screws.

[0013] In some embodiments, a first insertion portion is formed at the distal end of the connecting rod to extend into the proximal end of the head of the trephine. A threaded hole is formed in the outer peripheral wall of the first insertion portion, and a through hole is correspondingly formed in the outer peripheral wall at the proximal end of the head of the trephine. The screw passes through the through hole and is screwed into the threaded hole.

[0014] In some embodiments, the number of the threaded holes is greater than the number of the through holes.

[0015] In some embodiments, the connecting rod and the head of the trephine are connected by threads.

[0016] In some embodiments, a second insertion portion is formed at the proximal end of the head of the trephine to insert into the distal end of the connecting rod. External threads are provided on the outer peripheral wall of the insertion portion, and internal threads are provided on the inner peripheral wall at the distal end of the connecting rod. The external threads on the second insertion portion are engaged with the internal threads on the connecting rod.

[0017] In some embodiments, a third insertion portion is formed at the proximal end of the head of the trephine to insert into the distal end of the connecting rod. The cross section of the third insertion portion is polygonal, and a retaining ring is formed at the distal end of the third insertion portion. A polygonal groove for accommodating the third insertion portion and a ring groove for accommodating the retaining ring are correspondingly formed at the distal end of the connecting rod.

[0018] With the visual trephine of the present utility model, since the head of the trephine is detachable relative to the connecting rod and the tracker is detachable relative to the trephine body, medical staff can flexibly choose to discard the head of the trephine and retain the connecting rod of the trephine body and the components at the proximal end of the connecting rod after using the trephine; or choose to discard the entire trephine body and only retain the tracker, so as to improve the problem of waste of surgical instruments and reduce the surgical cost. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural view of the visual trephine of this embodiment;

[0020] Figure 2 It is an exploded structural view of the visual trephine of this embodiment

[0021] Figure 3 It is a schematic connection structure view of the connecting rod and the trephine head in the first embodiment;

[0022] Figure 4 It is a schematic connection structure view of the connecting rod and the trephine head in the second embodiment;

[0023] Figure 5 It is a schematic connection structure view of the connecting rod and the trephine head in the third embodiment.

[0024] In the figure: handle 10; transition part 11; holding part 12; first step 13; second step 14; connecting rod 20; first insertion part 21; threaded hole 22; polygonal groove 23; annular groove 24; trephine head 30; through hole 31; second insertion part 32; third insertion part 33; retaining ring 34; reference frame 40; connecting sleeve 41; limit nut 50. Detailed Description of the Embodiments

[0025] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following will be described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model.

[0027] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] Example 1

[0029] As Figure 1 and Figure 2 shown, this embodiment provides a disposable visualization trephine, which includes a trephine body and a tracker. The trephine body includes a handle 10, a connecting rod 20, and a trephine head 30. A gripping portion 12 is provided at the proximal end of the handle 10. The gripping portion 12 vertically extends out from both sides of the handle 10. The distal end of the handle 10 is fixedly connected to the proximal end of the connecting rod 20. The distal end of the connecting rod 20 is detachably connected to the proximal end of the trephine head 30, so that the trephine head 30 can be discarded after use, and the connecting rod 20 and the components proximal to it are retained; the distal end of the trephine head 30 is formed with saw teeth for cutting bones and other human tissues.

[0030] The tracker of this embodiment includes a reference frame 40. Multiple branches are formed at the upper end of the reference frame 40 for installing lamp beads. A connecting sleeve 41 is formed at the lower end of the reference frame 40. The connecting sleeve 41 is detachably connected to the trephine body, so that the trephine body can be discarded after use, and the tracker is retained.

[0031] In the visualization trephine of this embodiment, the trephine head 30 is detachable relative to the connecting rod 20, and the handle 10 is detachable relative to the tracker. Medical staff can flexibly choose to discard the trephine head 30 or the trephine body after using the trephine, thereby reducing costs.

[0032] This embodiment preferably integrally forms the connecting rod 20 and the handle 10 to ensure the connection strength between the connecting rod 20 and the handle 10 and simplify the assembly process. In some embodiments, the connecting rod 20 and the handle 10 can be designed as a segmented structure according to requirements, and the connecting rod 20 and the handle 10 are connected into one body by splicing.

[0033] This embodiment preferably forms a transition portion 11 between the handle 10 and the connecting rod 20 for the connecting sleeve 41 to be detachably sleeved on the transition portion 11. A first step 13 is formed between the proximal end of the transition portion 11 and the distal end of the handle 10, and a second step 14 is formed between the distal end of the transition portion 11 and the proximal end of the connecting rod 20. The connecting sleeve 41 is movably sleeved on the transition portion 11 from the distal end of the transition portion 11, and the proximal end of the connecting sleeve 41 is limited by the first step 13. A limit nut 50 is provided at the distal end of the connecting sleeve 41. The limit nut 50 is screwed onto the transition portion 11 from the distal end of the transition portion 11. A limit ring is formed on the inner peripheral wall at the distal end of the limit nut 50 for abutting against the second step 14 to limit the tightening depth of the limit nut 50.

[0034] The reference frame 40 of this embodiment is movably sleeved on the transition part 11 through a connecting sleeve 41. The axial movement of the connecting sleeve 41 is restricted by a limit nut 50 and a first step 13. At this time, the connecting sleeve 41 can rotate relative to the handle 10, and the reference frame 40 can remain stationary when the handle 10 rotates, thereby ensuring the accuracy of positioning. When the limit nut 50 is removed, the reference frame 40 can be removed from the transition part 11, and the annular saw head 30, the connecting rod 20, and the handle 10 can be discarded as a whole, and only the tracker is retained. It should be noted that the connecting sleeve 41 of this embodiment being movably sleeved on the transition part 11 specifically means that: without other restrictions, the connecting sleeve 41 can axially move and circumferentially rotate relative to the transition part 11. The tracker can also be connected to the handle 10 by other conventional means such as bolts and buckles, which are not elaborated in this embodiment.

[0035] For specific reference Figure 3 , in this embodiment, the connecting rod 20 and the annular saw head 30 are connected by screws, so that the annular saw head 30 and the connecting rod 20 are detachable. Specifically, a first insertion part 21 is formed at the distal end of the connecting rod 20 to extend into the proximal end of the annular saw head 30. Threaded holes 22 are preferably provided on the outer peripheral wall of the first insertion part 21, and through holes 31 are provided on the outer peripheral wall of the proximal end of the annular saw head 30. The through holes 31 penetrate into the inside of the annular saw head 30 and can correspond to the threaded holes 22. The screw can first pass through the through hole 31 of the annular saw head 30 and be screwed into the threaded hole 22 of the first insertion part 21 to fix the connecting rod 20 and the annular saw head 30; after the screw is removed from the threaded hole 22, the connecting rod 20 and the annular saw head 30 can be separated, which is convenient for replacement.

[0036] The number of threaded holes 22 in the first insertion part 21 of this embodiment is greater than the number of through holes 31 in the annular saw head 30, so that the annular saw can be connected to the first insertion part 21 by bolts. Since the annular saw head 30 is discarded more frequently, the production quantity of the annular saw head 30 is larger. In this embodiment, the number of through holes 31 provided on the annular saw head 30 is smaller, which is more convenient for the production and processing of the annular saw head 30. In some embodiments, the number of through holes 31 can correspond one-to-one to the number of threaded holes 22.

[0037] The annular saw head 30 of this embodiment is preferably made of a metal material, and the handle 10 and the connecting rod 20 are preferably made of plastic, which reduces the cost while ensuring the hardness of the annular saw head 30. It should be noted that the metal material of the annular saw head 30 is a conventional metal that meets the hardness requirements of the annular saw, and the specific components are not elaborated in this embodiment.

[0038] Embodiment Two

[0039] For specific reference Figure 4, the difference between this embodiment and the first embodiment lies in the connection structure between the connecting rod 20 and the circular saw head 30. In this embodiment, the connecting rod 20 and the circular saw head 30 are connected by threads, so that the circular saw head 30 is detachable from the connecting rod 20. Specifically, a second insertion portion 32 is formed at the proximal end of the circular saw head 30 to insert into the distal end of the connecting rod 20. An external thread is provided on the outer peripheral wall of the insertion portion, and an internal thread is provided on the inner peripheral wall of the distal end of the connecting rod 20. The circular saw head 30 is engaged with the internal thread on the connecting rod 20 through the external thread on the second insertion portion 32, so that the circular saw head 30 and the connecting rod 20 are connected together. Since the processing difficulty of the external thread is usually lower than that of the internal thread, this embodiment preferably processes the external thread with lower processing difficulty on the disposable circular saw head 30, which is more convenient for the production and processing of the circular saw head 30.

[0040] Embodiment Three

[0041] For specific reference Figure 5 , the difference between this embodiment and the first embodiment lies in the connection structure between the connecting rod 20 and the circular saw head 30. A third insertion portion 33 is formed at the proximal end of the circular saw head 30 to insert into the distal end of the connecting rod 20. The cross-section of the third insertion portion 33 is polygonal. A retaining ring 34 is formed at the distal end of the third insertion portion 33. A polygonal groove 23 for accommodating the third insertion portion 33 and a ring groove 24 for accommodating the retaining ring 34 are correspondingly formed at the distal end of the connecting rod 20. The third insertion portion 33 can transmit torque when inserted into the polygonal groove 23, and the retaining ring 34 can prevent the circular saw head 30 from slipping axially during normal operation. Applying an external force to the circular saw head 30 axially towards the distal end can disassemble the circular saw head 30.

[0042] It should be noted that the proximal end and the distal end of this embodiment are referenced with respect to medical staff. The part facing the medical staff is the proximal end, and the part facing the patient is the distal end. Since the means of combining the optical navigation technology with surgical instruments to assist surgery is relatively conventional, the specific principle of the tracker and other components are not described in this embodiment.

[0043] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0044] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A visualization trephine, comprising a trephine body and a tracker, characterized in that: The trephine body includes a handle (10), a connecting rod (20) and a trephine head (30) connected in sequence. The distal end of the handle (10) is fixedly connected to the proximal end of the connecting rod (20); the tracker includes a reference frame (40), and a connecting sleeve (41) is formed at the lower end of the reference frame (40); The distal end of the connecting rod (20) is detachably connected to the proximal end of the trephine head (30), and the connecting sleeve (41) is detachably connected to the trephine body, so that the trephine head (30) and the trephine body can be selectively discarded.

2. The visualizing trephine according to claim 1, wherein: A transition portion (11) is formed between the handle (10) and the connecting rod (20). The proximal end of the transition portion (11) forms a first step (13) with the distal end of the handle (10), and the distal end of the transition portion (11) forms a second step (14) with the proximal end of the connecting rod (20); the connecting sleeve (41) is movably sleeved on the transition portion (11), the proximal end of the connecting sleeve (41) is limited by the first step (13), and a limit nut (50) is provided at the distal end of the connecting sleeve (41) for limiting.

3. The visualizing trephine according to claim 2, wherein: The limit nut (50) is screwed onto the transition portion (11) from the distal end of the transition portion (11). A limit ring is formed on the inner peripheral wall of the distal end of the limit nut (50), and the limit ring cooperates with the second step (14) to limit the tightening depth of the limit nut (50).

4. The visualizing trephine according to claim 1, wherein: The trephine head (30) is made of metal material, and the handle (10) and the connecting rod (20) are made of plastic.

5. The visualizing trephine according to any one of claims 1-4, characterized in that: The connecting rod (20) and the trephine head (30) are connected by screws.

6. The visualizing trephine according to claim 5, wherein: A first insertion portion (21) is formed at the distal end of the connecting rod (20) to extend into the proximal end of the trephine head (30). A threaded hole (22) is formed on the outer peripheral wall of the first insertion portion (21), and a through hole (31) is correspondingly formed on the outer peripheral wall of the proximal end of the trephine head (30). The screw passes through the through hole (31) and is screwed into the threaded hole (22).

7. The visualizing trephine according to claim 6, characterized in that: The number of the threaded holes (22) is greater than the number of the through holes (31).

8. The visualizing trephine according to any one of claims 1-4, characterized in that, The connecting rod (20) and the trephine head (30) are connected by threads.

9. The visualizing trephine according to claim 8, wherein: A second insertion portion (32) is formed at the proximal end of the trephine head (30) to insert into the distal end of the connecting rod (20). External threads are provided on the outer peripheral wall of the insertion portion, and internal threads are provided on the inner peripheral wall of the distal end of the connecting rod (20). The external threads on the second insertion portion (32) are engaged with the internal threads on the connecting rod (20).

10. The visualizing trephine according to any one of claims 1-4, characterized in that: A third insertion portion (33) is formed at the proximal end of the trephine head (30) to insert into the distal end of the connecting rod (20). The cross section of the third insertion portion (33) is polygonal, and a retaining ring (34) is formed at the distal end of the third insertion portion (33); a polygonal groove (23) for accommodating the third insertion portion (33) and a ring groove (24) for accommodating the retaining ring (34) are correspondingly formed at the distal end of the connecting rod (20).

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