Trephine for minimally invasive spine surgery

Abstract

The utility model relates to a trephine for a minimally invasive spine surgery, belongs to the technical field of medical instruments, and solves the technical problem that a manual trephine and an electric trephine for the minimally invasive spine surgery cannot be universally used. The trephine comprises a saw handle, a saw rod and saw teeth, the saw rod is rotatably mounted on the saw handle; the saw handle comprises a box body, an electric assembly, a manual assembly and a gear shifting assembly; the gear shifting assembly comprises a first ring body, a second ring body and a bearing. The first ring body is rotatably connected with the box body, the second ring body is slidably connected with the box body, the second ring body can drive the saw rod to move in the axial direction by rotating the first ring body, and the saw rod is matched with the manual assembly or the electric assembly so as to enter a manual gear or an electric gear. The trephine disclosed by the utility model can be used for carrying out manual ring cutting and electric ring cutting, and switching between an electric gear and a manual gear can be carried out without dismounting, so that the operation steps of a doctor are simplified, and the efficiency of a foramen vertebroplasty operation under a foramen vertebroscope is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a ring saw used for minimally invasive spine surgery. Background Art

[0002] Transforaminal endoscopic lumbar disc surgery is a common choice for the treatment of lumbar disc herniation. In this operation, the doctor needs to use a ring saw to perform a circular resection of the spine. In order to balance the resection force and surgical safety, and to reduce the doctor's operating fatigue, the operation usually combines manual and electric operation modes. However, there is currently no universal ring saw that is both manual and electric. During the operation, the ring saw often needs to be repeatedly disassembled and installed to switch between manual and electric modes. This process is both cumbersome and time-consuming. Utility Model Content

[0003] In view of the above analysis, the embodiment of the utility model aims to provide a ring saw for minimally invasive spinal surgery to solve the technical problem that manual and electric ring saws used in minimally invasive spinal surgery cannot be used interchangeably.

[0004] The purpose of this utility model is mainly achieved through the following technical solutions:

[0005] A trephine saw for minimally invasive spinal surgery comprises a saw handle, a saw bar and saw teeth; the saw bar is rotatably mounted on the saw handle;

[0006] The saw handle comprises a box body, an electric component, a manual component and a gear adjustment component, and the electric component, the manual component and the gear adjustment component are all located in the box body;

[0007] The gear adjustment assembly comprises a first ring body, a second ring body and a bearing, the first ring body and the second ring body are rotatably connected, the second ring body is fixedly sleeved outside the bearing, and the bearing is sleeved on the saw rod;

[0008] The first ring body is rotatably connected to the box body, and the second ring body is slidably connected to the box body. Rotating the first ring body can cause the second ring body to drive the saw bar to move axially, so that the saw bar can cooperate with the manual component or the electric component respectively to enter the manual gear position or the electric gear position.

[0009] Furthermore, a connecting cavity is provided in the box body, and the first ring body and the second ring body are both located in the connecting cavity.

[0010] Furthermore, a side wall of the connecting cavity is provided with an annular rotating groove, and a side wall of the first ring body is provided with a rotating block matching the rotating groove.

[0011] Furthermore, a vertical sliding groove is provided on the side wall of the connecting cavity, and a sliding block matching the sliding groove is provided on the side wall of the second ring body.

[0012] Furthermore, a spiral matching structure is provided between the first ring body and the second ring body.

[0013] Furthermore, the box body includes an upper cover, and a mirror hole is opened on the upper cover for inserting a foraminal mirror.

[0014] Furthermore, the electric assembly includes a driven gear, an electric slot and an electric key. The electric slot is located at the shaft hole of the driven gear, and the electric key is located on the outer wall of the saw bar and matches the electric slot.

[0015] Furthermore, the manual assembly includes a manual slot and a manual key, wherein the manual slot is located on the inner wall of the upper cover, and the manual key is located at the end of the saw bar and matches the manual slot.

[0016] Furthermore, both the manual key and the electric key are bar-shaped protrusions.

[0017] Furthermore, the gear adjustment assembly also includes a gear control component, one end of which is fixed on the first ring body, and the other end is located outside the box body.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] (1) The circular saw of the utility model can perform both manual and electric circular cutting, and the electric and manual gears can be switched without disassembly, which simplifies the operation steps of the doctor and improves the efficiency of the foraminal plasty surgery under the percutaneous endoscopic discectomy.

[0020] (2) The ring saw of the utility model, by providing a rotating telescopic structure between the first ring body and the second ring body, can drive the saw bar to slide axially through rotation, thereby completing the conversion between electric and manual gear positions.

[0021] (3) The ring saw of the utility model adopts a spiral rotating and telescopic structure that cooperates with each other, so the structure is simple, the number of parts is small, the operation is flexible and easy to control.

[0022] (4) The manual assembly and the electric assembly of the ring saw of the utility model can respectively drive the saw bar to rotate and conveniently switch between manual and electric gears by providing key slots that match each other.

[0023] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the following content, and some advantages can be obvious from the description or understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents specifically pointed out in the text and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0025] Figure 1 It is a schematic diagram of the overall external structure of a trephine saw according to a specific embodiment;

[0026] Figure 2 It is a schematic diagram of the overall internal structure of the saw handle of the ring saw in a specific embodiment;

[0027] Figure 3 It is a schematic diagram of the partial internal structure of the saw handle of the ring saw in a specific embodiment;

[0028] Figure 4 It is a schematic diagram of the internal structure of the upper cover of the box body of the ring saw in a specific embodiment;

[0029] Figure 5 It is a schematic cross-sectional structure diagram of a transmission gear of a ring saw according to a specific embodiment.

[0030] Reference numerals:

[0031] 1-saw handle; 11-housing; 111-connecting cavity; 1111-rotating groove; 1112-sliding groove; 112-upper cover; 113-mirror hole; 114-control board; 1141-through groove; 12-electric component; 121-driven gear; 1211-electric groove; 122-electric key; 13-manual component; 131-manual groove; 132-manual key; 14-gear adjustment component; 141-first ring body; 1411-rotating block; 142-second ring body; 1421-sliding block; 143-bearing; 144-gear control member; 2-saw bar; 3-saw teeth. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0033] Example 1

[0034] A specific embodiment of the utility model is as follows Figure 1 and Figure 2 As shown, the utility model provides a ring saw for minimally invasive spinal surgery, including a saw handle 1, a saw rod 2 and saw teeth 3; the saw handle 1 includes a box body 11, an electric component 12, a manual component 13 and a gear adjustment component 14, and the electric component 12, the manual component 13 and the gear adjustment component 14 are all located in the box body 11; the box body 11 includes an upper cover 112, and a mirror hole 113 is opened on the upper cover 112 for inserting a foraminal endoscope.

[0035] One end of the saw rod 2 is located in the box body 11, and the other end is fixedly connected to the saw teeth 3. The axis line of the mirror hole 113 coincides with the axis line of the saw rod 2. The intervertebral foraminal endoscope can be inserted into the saw rod 2 through the mirror hole 113, so that the ring saw can be operated visually under the intervertebral foraminal endoscope; the gear adjustment component 14 can switch the ring saw between electric and manual modes, so that the ring saw can be operated electrically and manually respectively without disassembly, which simplifies the doctor's operating steps and improves the efficiency of foraminal shaping surgery under the intervertebral foraminal endoscope.

[0036] Specifically, in order to facilitate hand holding, the box body 11 is in the shape of a long strip, including an upper cover 112 in contact with the palm and control panels 114 on both sides, which are used for holding and pressing with the palms during circumcision so that the teeth 3 of the circumcision apply pressure to the vertebrae while rotating. The control panel 114 is provided with a control component for operating the circumcision.

[0037] Further, such as Figure 3 , Figure 4 and Figure 5 As shown, the gear adjustment assembly 14 is sleeved on the end of the saw bar 2, and includes a first ring body 141, a second ring body 142 and a bearing 143. The second ring body 142 is fixedly sleeved outside the bearing 143, and the bearing 143 is sleeved on the saw bar 2; the first ring body 141 and the second ring body 142 are connected by rotation and telescoping. Preferably, the inner wall of the first ring body 141 is provided with a spiral rotating groove 1412, and the outer wall of the second ring body 142 is provided with a rotating slider 1422 matching the rotating groove 1412. By rotating, the second ring body 142 can be linearly telescoped on the first ring body 141, so that the saw bar 2 can be driven to move along the axis to adjust and switch between manual and electric gears. The gear adjustment assembly 14 of this embodiment adopts a spiral rotating and telescopic structure to cooperate with each other, so it has a simple structure, fewer parts, flexible operation and easy control.

[0038] Furthermore, a connecting cavity 111 is provided in the box body 11, and the first ring body 141 and the second ring body 142 are both located in the connecting cavity 111. The side wall of the connecting cavity 111 is provided with an annular groove 1111, and the side wall of the first ring body 141 is provided with an axial positioning block 1411 matching the annular groove 1111. The axial positioning block 1411 matches the annular groove 1111, so that the position of the first ring body 141 and the connecting cavity 111 in the direction of the axis centerline can be fixed, and can rotate relatively along the axis centerline.

[0039] Furthermore, the side wall of the connecting cavity 111 is provided with a strip groove 1112 along the axis direction, and the side wall of the second ring body 142 is provided with a circumferential positioning block 1421 matching the strip groove 1112. The circumferential positioning block 1421 matches the strip groove 1112, so that the position of the second ring body 142 and the connecting cavity 111 in the circumferential direction can be fixed, and can slide relative to each other along the axis direction.

[0040] Since the position of the first ring body 141 and the connecting cavity 111 in the axial direction is fixed, and the position of the second ring body 142 and the connecting cavity 111 in the circumferential direction is fixed, when the first ring body 141 is rotated, due to the cooperation between the rotating groove 1412 and the rotating slider 1422, the second ring body 142 can move linearly in the connecting cavity 111 toward or away from the upper cover 112, thereby driving the saw rod 2 to move linearly synchronously.

[0041] Furthermore, the electric assembly 12 includes a driven gear 121, an electric slot 1211 and an electric key 122. The electric slot 1211 is located in the shaft hole of the driven gear 121 and is used to drive the electric key 122 to rotate synchronously. The electric key 122 is located on the outer wall of the saw bar 2 and matches the electric slot 1211.

[0042] Furthermore, the manual assembly 13 includes a manual slot 131 and a manual key 132. The manual slot 131 is located on the inner wall of the upper cover 112 and is used to drive the manual key 21 to rotate synchronously. The manual key 132 is located at the end of the saw bar 2 and matches the manual slot 131.

[0043] Preferably, the manual key 132 and the electric key 122 are both strip-shaped protrusions located on the side wall of the saw bar 2 .

[0044] The electric component 12 and the manual component 13 of this embodiment both include keyways that match each other, which can respectively drive the saw bar 2 to rotate and facilitate switching between manual and electric gears.

[0045] When the trepanning saw of this embodiment is in use, the initial state can be set to the manual gear position, at which time the manual key 132 is located in the manual slot 131, and the electric key 122 is separated from the electric slot 1211. When the saw handle 1 is rotated back and forth, the manual slot 131 drives the manual key 132 to rotate the saw bar 2, and the hand presses the upper cover 112 at the same time, so that the saw teeth 3 perform trepanation on the target vertebra. When electric cutting is required, the first ring body 141 is rotated to move the saw bar 2 away from the upper cover 112 until the electric key 122 is located in the electric slot 1211, and the bottom surface of the electric key 122 is in contact with the bottom surface of the electric slot 1211, and the manual key 132 is moved out of the manual slot 131, and the conversion from manual gear to electric gear is completed. When it is necessary to switch from the electric gear to the manual gear, the first ring body 141 is rotated in the reverse direction to move the saw bar 2 toward the upper cover 112 until the manual key 132 is located in the manual slot 131 and the top surface of the manual key 132 is in contact with the bottom surface of the manual slot 131. At the same time, the electric key 122 moves out of the electric slot 1211 to complete the switch from the electric gear to the manual gear.

[0046] It should be noted that in order to align the slot keys with each other when shifting gears, the electric component 12 can be provided with a function of resetting the driven gear 121. The technology for realizing the resetting function is prior art and does not fall within the protection scope of the present utility model.

[0047] Further, such as Figure 1 and Figure 3 As shown, the gear adjustment assembly 14 further includes a gear control member 144, one end of which is fixed to the first ring body 141, and the other end is located outside the box body 11. Preferably, a through slot 1141 is provided on the control panel 114, and the gear control member 144 is a push rod or an arc-shaped rotating disk with stripes, and the other end of the gear control member 144 passes through the through slot 1141 to facilitate the hand to perform gear adjustment control outside the box body 11.

[0048] Preferably, in order to make the structure of the ring saw more stable during operation, buckles are provided at both ends of the through slot 1141 to lock the gear control member 144 in the manual or electric position to prevent accidental movement of the internal components.

[0049] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A trephine for minimally invasive spinal surgery, characterized in that: It comprises a saw handle (1), a saw bar (2) and saw teeth (3); the saw bar (2) is rotatably mounted on the saw handle (1); The saw handle (1) comprises a box body (11), an electric component (12), a manual component (13) and a gear adjustment component (14); the electric component (12), the manual component (13) and the gear adjustment component (14) are all located in the box body (11); The gear adjustment assembly (14) comprises a first ring body (141), a second ring body (142) and a bearing (143); the first ring body (141) and the second ring body (142) are rotatably connected; the second ring body (142) is fixedly sleeved outside the bearing (143); and the bearing (143) is sleeved on the saw bar (2); The first ring body (141) is rotatably connected to the housing (11), and the second ring body (142) is slidably connected to the housing (11). Rotating the first ring body (141) enables the second ring body (142) to drive the saw bar (2) to move axially, so that the saw bar (2) can respectively cooperate with the manual component (13) or the electric component (12) to enter the manual gear position or the electric gear position.

2. The trephine for minimally invasive spinal surgery according to claim 1, characterized in that: A connecting cavity (111) is provided in the box body (11), and the first ring body (141) and the second ring body (142) are both located in the connecting cavity (111).

3. The trephine for minimally invasive spinal surgery according to claim 2, characterized in that: The side wall of the connecting cavity (111) is provided with an annular rotating groove (1111), and the side wall of the first ring body (141) is provided with a rotating block (1411) matching the rotating groove (1111).

4. The trephine for minimally invasive spinal surgery according to claim 3, characterized in that: A vertical sliding groove (1112) is provided on the side wall of the connecting cavity (111), and a sliding block (1421) matching the sliding groove (1112) is provided on the side wall of the second ring body (142).

5. The trephine for minimally invasive spinal surgery according to claim 4, characterized in that: A spiral matching structure is provided between the first ring body (141) and the second ring body (142).

6. The trephine for minimally invasive spinal surgery according to any one of claims 1 to 5, characterized in that: The box body (11) comprises an upper cover (112), and a mirror hole (113) is provided on the upper cover (112) for inserting a foraminal mirror.

7. The trephine for minimally invasive spinal surgery according to claim 6, characterized in that: The electric component (12) comprises a driven gear (121), an electric slot (1211) and an electric key (122); the electric slot (1211) is located in the shaft hole of the driven gear (121); and the electric key (122) is located on the outer wall of the saw bar (2) and matches the electric slot (1211).

8. The trephine for minimally invasive spinal surgery according to claim 7, characterized in that: The manual assembly (13) comprises a manual slot (131) and a manual key (132), wherein the manual slot (131) is located on the inner wall of the upper cover (112), and the manual key (132) is located at the end of the saw bar (2) and matches the manual slot (131).

9. The trephine for minimally invasive spinal surgery according to claim 8, characterized in that: The manual key (132) and the electric key (122) are both bar-shaped protrusions.

10. The trephine for minimally invasive spinal surgery according to claim 9, characterized in that: The gear adjustment assembly (14) further comprises a gear position control member (144), one end of which is fixed on the first ring body (141) and the other end of which is located outside the box body (11).

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