An annulus fibrosus disposable puncture forming device

Abstract

The application discloses a kind of disposable hole breaking forming devices of annulus fibrosus, for adsorbing annulus fibrosus and cutting it, including sleeve, cutting rod and adsorption component, cutting rod is worn and slidingly connected in sleeve, and adsorption component is located at the first end of sleeve;First end of cutting rod is close to the first end of sleeve and is equipped with broken hole cutting part, and second end of cutting rod extends from the second end of sleeve;One side of cutting rod is equipped with rack part, and rack part is equipped with a plurality of first meshing teeth along the axial direction of cutting rod;Gear member is rotatably connected on the position of sleeve corresponding to rack part, and one side of gear member is equipped with a plurality of second meshing teeth for meshing with first meshing tooth;External thread part is arranged on cutting rod, and internal thread part is arranged in sleeve.The application is first adsorbed annulus fibrosus by adsorption component, on the one hand, can adsorb and fix annulus fibrosus while stabilizing the device during cutting, on the other hand, can adsorb and tension annulus fibrosus, more conducive to cutting annulus fibrosus, improve cutting efficiency.

Description

Technical Field

[0001] This invention belongs to the field of medical technology, and in particular relates to a device for one-time perforation and forming of annulus fibrosus. Background Technology

[0002] The human intervertebral disc consists of three parts: the cartilaginous endplate, the annulus fibrosus, and the nucleus pulposus. The annulus fibrosus is a multi-layered structure with fibers arranged almost concentrically. The fibers on the periphery are more vertical, while the inclination increases towards the center. Lumbar disc herniation is a relatively common condition. It mainly occurs because, after varying degrees of degeneration, the nucleus pulposus, especially the intervertebral disc, compresses the weakened annulus fibrosus under the influence of forces, forming a protrusion or even herniation of the annulus fibrosus. This leads to irritation or compression of adjacent spinal nerve roots, resulting in a series of clinical symptoms such as lower back pain, numbness and pain in one or both lower limbs. Surgical treatment is performed when conservative treatment is ineffective to remove the herniated disc tissue and hypertrophic tissue compressing the nerve (surgical decompression).

[0003] Discectomy is a minimally invasive surgery for lumbar disc herniation, with significant effects, especially suitable for patients with recurrent lumbar disc herniation. During the procedure, the surgeon first addresses the herniated disc. Specifically, the surgeon uses a sharp scalpel to puncture the annulus fibrosus, creating a rupture. Then, using the scalpel, they repeatedly cut around the rupture to enlarge the perforation. Finally, forceps are used to remove the herniated tissue, completing the decompression. However, the surgical scalpel is not designed for creating a perforation in the annulus fibrosus. Therefore, creating the perforation using a sharp scalpel in the confined and deep surgical space is cumbersome, resulting in poor surgical visibility and low efficiency.

[0004] The invention patent application with application number 202022634504.2 discloses an annulus fibrosus opening device for interbody fusion surgery, including an operating rod and a cutter disposed at one end of the operating rod. The cutter is located on one side of the operating rod, and first cutting edges are disposed on opposite sides of the cutter. The first cutting edges are located between the end of the cutter away from the operating rod and the operating rod.

[0005] Existing fiber ring openers use a manual, direct rotation of the operating lever to cut a circular opening with the first cutting edge on the side of the cutter. However, the fiber ring is a tightly packed structure composed of individual fibers and has a certain degree of elasticity. Therefore, when rotating directly, the large contact area between the fibers and the blade makes it difficult to cut through the fiber ring. Instead, the fiber ring is stretched, resulting in a larger and more irregular opening. This leads to further blunt damage to the fibers around the opening, resulting in poor overall cutting efficiency and effectiveness. Summary of the Invention

[0006] To address the problems in the background art, the purpose of this invention is to provide a one-time perforation forming device for fiber rings, used for adsorbing and cutting fiber rings, including a sleeve, a cutting rod, and an adsorption assembly. The cutting rod is inserted through and slidably connected inside the sleeve, and the adsorption assembly is disposed at the first end of the sleeve.

[0007] The first end of the cutting rod is close to the first end of the sleeve and has a piercing cutting part, and the second end of the cutting rod extends out of the second end of the sleeve;

[0008] The cutting rod has a rack portion on one side, and the rack portion has a plurality of first meshing teeth along the axial direction of the cutting rod; a gear component is rotatably connected to the sleeve at a position corresponding to the rack portion, and a plurality of second meshing teeth are provided on one side of the gear component for meshing with the first meshing teeth;

[0009] The cutting rod is provided with an external thread, and the sleeve is provided with an internal thread.

[0010] In the initial state, the perforation cutting part is located inside the sleeve, the rack part and the gear part are not engaged, and the external thread part is located on the side of the internal thread part away from the first end of the sleeve;

[0011] During operation, the fiber ring is adsorbed by the adsorption component, and the gear is rotated to mesh with the rack, thereby driving the cutting rod to move toward the first end of the sleeve, so that the perforation cutting part extends out of the first end of the sleeve and pierces the fiber ring.

[0012] After the gear rotates to disengage from the rack, the external threaded part moves to abut against the internal threaded part. The second end of the cutting rod is rotated to engage the external threaded part with the internal threaded part, thereby driving the cutting rod to move spirally toward the first end of the sleeve, so that the perforation cutting part spirally cuts the fiber ring.

[0013] Preferably, the first end of the sleeve is provided with an annular placement groove, and the adsorption component is disposed in the annular placement groove.

[0014] Preferably, the adsorption assembly includes an annular distribution tube, a plurality of suction nozzles, an extension tube, and an air intake assembly. The annular distribution tube is disposed within the annular receiving groove, and the plurality of suction nozzles are disposed on the side of the annular distribution tube facing the first end of the sleeve. The side wall of the sleeve is provided with a receiving hole extending from its first end to its second end, and the receiving hole communicates with the annular receiving groove. The extension tube is disposed within the receiving hole, with one end connected to the annular distribution tube and the other end extending out of the second end of the sleeve and connected to the air intake assembly.

[0015] Preferably, the rack portion has four first meshing teeth, and the gear component has four second meshing teeth.

[0016] Preferably, the hole-breaking cutting section includes a plurality of arc-shaped blades, which are circumferentially spaced at the first end of the cutting rod. The open end of each arc-shaped blade is a spike, and the spike has cutting edges on both sides.

[0017] Preferably, a notch is provided on one side of the sleeve, and a connecting plate is provided on both sides of the notch on the outer wall of the sleeve. A rotating shaft is rotatably connected between the two connecting plates. The gear is sleeved and fixed to the rotating shaft, and the gear meshes with the rack through the notch.

[0018] Preferably, one end of the rotating shaft is provided with a first handle.

[0019] Preferably, the second end of the cutting rod is provided with a second handle.

[0020] Preferably, a step is provided on one side of the cutting rod, and the rack portion is disposed on the step.

[0021] Preferably, the first end of the sleeve is provided with a protective sleeve made of silicone or rubber, the shape of which is consistent with the sleeve, and the adsorption component is disposed on the protective sleeve.

[0022] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art:

[0023] This invention first uses an adsorption component to adsorb the fiber ring. On the one hand, this adsorption fixes the fiber ring during the cutting process, stabilizing the device; on the other hand, it tensions the fiber ring, making it easier to cut and improving cutting efficiency. Then, a gear meshes with a rack, causing the cutting part to extend from the sleeve and pierce the fiber ring through a hole, facilitating subsequent cutting. Next, rotating the cutting rod engages the external and internal threads. The engagement of the external and internal threads, combined with the rotation of the cutting rod, allows the hole-breaking cutting part to spirally cut the fiber ring. During this process, only manual control of the cutting rod's rotation force is required; there is no need to apply force directly to the cutting rod towards the fiber ring by hand. In other words, no direct force is required on the cutting rod towards the fiber ring during the entire hole-breaking cutting process. Furthermore, since the fiber ring is composed of individual fibers with strong toughness, spiral cutting is easier, resulting in higher overall control precision and high cutting efficiency and effectiveness throughout the entire process. At the same time, after the piercing and cutting part initially penetrates the fiber ring to pierce the hole, due to the limited meshing stroke of the gear and rack parts, the gear part automatically disengages from the rack part, which allows for precise control of the piercing depth and prevents errors caused by purely manual piercing. Attached Figure Description

[0024] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the entire invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the entire invention. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the cutting rod of the present invention;

[0028] Figure 4 This is a cross-sectional view of the sleeve of the present invention;

[0029] Figure 5 This is a schematic diagram of the adsorption component of the present invention;

[0030] Figure 6 This is a cross-sectional view of the rack and gear components of the present invention when they are engaged.

[0031] Figure 7 This is a cross-sectional view of the rack and gear components of the present invention when they are disengaged.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1: Sleeve; 2: Cutting rod; 3: Adsorption assembly; 4: Hole-breaking cutting section; 5: Gear component; 6: Second meshing tooth; 7: External thread section; 8: Internal thread section; 9: Annular receiving groove; 10: Annular distribution tube; 11: Suction nozzle; 12: Extension tube; 13: Receiving hole; 14: First meshing tooth; 15: Arc-shaped blade; 16: Notch; 17: First handle; 18: Second handle; 19: Step; 20: Protective sleeve; 21: Connecting plate. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0036] See Figures 1 to 7The core of this invention is to provide a one-time perforation forming device for fiber rings, which is used to adsorb fiber rings and cut them after perforation. It includes a sleeve 1, a cutting rod 2 and an adsorption component 3. The cutting rod 2 is inserted through and slidably connected inside the sleeve 1, and the adsorption component 3 is located at the first end of the sleeve 1.

[0037] Both the cutting rod 2 and the sleeve 1 are made of stainless steel. The first end of the cutting rod 2 is close to the first end of the sleeve 1 and has a perforation cutting section 4. The second end of the cutting rod 2 extends out of the second end of the sleeve 1. The perforation cutting section 4 includes several arc-shaped blades 15 made of stainless steel. The arc-shaped blades 15 are circumferentially spaced at the first end of the cutting rod 2. The circumference size is the size of the opening to be made in the annulus fibrosus. The diameter of the circumference can be set to 2-6 mm. The gap between the arc-shaped blades 15 reduces the contact area between the arc-shaped blades 15 and the annulus fibrosus tissue, making it easier to cut. The open end of the arc-shaped blade 15 is a spike for piercing the annulus fibrosus. The two sides of the spike are provided with cutting edges for circumferentially cutting the annulus fibrosus. This shape is beneficial for guiding the arc-shaped blades 15 to pierce and cut the annulus fibrosus.

[0038] The first end of the sleeve 1 is provided with an annular placement groove 9, and the adsorption component 3 is disposed within the annular placement groove 9. The adsorption component 3 is used to adsorb the fibrous ring. Specifically, the adsorption component 3 includes an annular distribution tube 10 made of medical rubber, several suction nozzles 11, an extension tube 12, and an air suction component. The annular distribution tube 10 is disposed within the annular placement groove 9, and the several suction nozzles 11 are disposed on the side of the annular distribution tube 10 facing the first end of the sleeve 1. The side wall of the sleeve 1 is provided with a receiving hole 13 extending from its first end to its second end, and the receiving hole 13 communicates with the annular placement groove 9. The extension tube 12 is disposed within the receiving hole 13, with one end connected to the annular distribution tube 10 and the other end extending out of the second end of the sleeve 1 and connected to the air suction component. The air suction component can be a vacuum pump, a negative pressure bag, a vacuum generator, etc.

[0039] A step 19 is provided on one side of the cutting rod 2, and a rack portion is provided on the step 19. The rack portion has a plurality of first meshing teeth 14 along the axial direction of the cutting rod 2. In this embodiment, four first meshing teeth 14 are provided. A gear component 5 is rotatably connected to the sleeve 1 at a position corresponding to the rack portion. A plurality of second meshing teeth 6 for meshing with the first meshing teeth 14 are provided on one side of the gear component 5. In this embodiment, four second meshing teeth 6 are provided.

[0040] Specifically, a notch 16 is provided on one side of the sleeve 1 corresponding to the rack portion. A connecting plate 21 is provided on both sides of the notch 16 on the outer wall of the sleeve 1. A rotating shaft is rotatably connected between the two connecting plates 21. The gear component 5 is sleeved and fixed to the rotating shaft. The gear component 5 meshes with the rack portion through the notch 16. A first handle 17 is provided at one end of the rotating shaft, which allows the gear component 5 to be rotated easily.

[0041] The cutting rod 2 has an external threaded part 7, and the sleeve 1 has an internal threaded part 8. The external threaded part 7 can be screwed into the internal threaded part 8. The second end of the cutting rod 2 is provided with a second handle 18 for easy rotation of the cutting rod 2.

[0042] In the initial state, the hole-cutting part 4 is located inside the sleeve 1, the rack part and the gear part 5 are not engaged, and the external thread part 7 is located on the side of the internal thread part 8 away from the first end of the sleeve 1.

[0043] During operation, the fiber ring is adsorbed by the adsorption component 3, and then the gear component 5 is rotated to mesh with the rack part, so as to drive the cutting rod 2 to move toward the first end of the sleeve 1, so that the piercing cutting part 4 extends out of the first end of the sleeve 1 and pierces the fiber ring.

[0044] After the gear 5 rotates until it disengages from the rack, the external thread 7 moves to abut against the internal thread 8. The second end of the cutting rod 2 is rotated to engage the external thread 7 with the internal thread 8, thereby driving the cutting rod 2 to move spirally toward the first end of the sleeve 1, so that the hole-breaking cutting part 4 spirally cuts the fiber ring.

[0045] Preferably, the first end of the sleeve 1 is provided with a protective sleeve 20 made of silicone or rubber, the protective sleeve 20 having the same shape as the sleeve 1, and the adsorption component 3 is disposed on the protective sleeve 20. An annular receiving groove 9 is provided at the end of the protective sleeve 20 away from the sleeve 1. The side wall of the protective sleeve 20 is also provided with a receiving hole 13, which is coaxial with the receiving hole 13 in the side wall of the sleeve 1. The protective sleeve 20 can prevent damage to surrounding nerves and ligaments during the insertion of this device into the human body.

[0046] Preferably, the cutting rod 2 is slidably connected to the sleeve 1 using a damped sliding fit. That is, the cutting rod 2 and the sleeve 1 can be fitted with an interference fit with a certain amount of interference, so that the cutting rod 2 will not slide in the sleeve 1 by its own weight, but must be manually slid in the sleeve 1. This prevents the cutting rod 2 from moving randomly during operation and makes it more accurate.

[0047] Preferably, an initial mark is provided on the cutting rod 2. When the initial mark just begins to protrude from the second end of the sleeve 1, it indicates that the cutting rod 2 is in the initial position. At this time, rotating the gear 5 clockwise will allow its foremost second meshing tooth 6 to smoothly mesh with the first meshing tooth 14 closest to the first end of the cutting rod 2. At this time, the gear 5 and the rack part have just begun to mesh. By setting the initial mark, the device can be quickly reset. In the initial state, the length of the cutting rod 2 extending from the second end of the sleeve 1 is configured as the travel distance of the piercing cutting part 4. When the second handle 18 touches the second end of the sleeve 1, it indicates that the piercing cutting is finished. Of course, a mark for the piercing depth can also be set on the cutting rod 2 to provide real-time feedback on the piercing depth.

[0048] The working process of this invention will be further explained below:

[0049] First, establish a minimally invasive surgical channel, dissect the tissue surrounding the protrusion, expose the pre-drilled position on the annulus fibrosus, and simultaneously adjust the device to its initial state. Then, deliver the device through the surgical channel to the pre-drilled position.

[0050] The adsorption assembly 3 is activated to adsorb the fiber ring. The gear 5 is rotated clockwise by the first handle 17 to engage with the rack. The gear 5 is rotated further to move the cutting rod 2 toward the first end of the sleeve 1, so that the perforation cutting part 4 extends out of the first end of the sleeve 1 and pierces the fiber ring. After the gear 5 disengages from the rack, the external thread 7 moves to abut against the internal thread 8. The cutting rod 2 is rotated by the second handle 18 to screw the external thread 7 and the internal thread 8 together, so that the cutting rod 2 moves spirally toward the first end of the sleeve 1, so that the perforation cutting part 4 spirally cuts the fiber ring, cuts the fiber ring between the arc blades 15, and completely frees the fiber ring tissue to be removed.

[0051] When resetting this device, first rotate the cutting rod 2 in the opposite direction. When the external thread 7 and the internal thread 8 are disengaged, slowly pull the cutting rod 2 to slide it to the initial position where the initial mark point just protrudes from the second end of the sleeve 1.

[0052] This invention first uses the adsorption component 3 to adsorb the fiber ring. On the one hand, it can adsorb and fix the fiber ring during the cutting process to prevent it from moving around. On the other hand, it can adsorb and tighten the fiber ring, which is more conducive to cutting the fiber ring and improves cutting efficiency. Then, the gear component 5 meshes with the rack part to drive the cutting part to extend out of the sleeve 1 and pierce the fiber ring, so as to facilitate the subsequent cutting of the fiber ring. Then, by rotating the cutting rod 2, the external thread part 7 and the internal thread part 8 are screwed together. Through the cooperation of the external thread part 7 and the internal thread part 8, the cutting rod 2 can be rotated so that the hole-breaking cutting part 4 can spirally cut the fiber ring. In this process, only the rotation force of the cutting rod 2 needs to be manually controlled. There is no need to apply force towards the fiber ring directly to the cutting rod 2 by hand. That is to say, there is no need to apply force towards the fiber ring directly to the cutting rod 2 by hand during the entire hole-breaking cutting process. Since the fiber ring is composed of individual fibers, the fiber structure has strong toughness, and spiral cutting is easier to cut, resulting in higher overall control precision and high cutting efficiency and good effect throughout the process. Simultaneously, after the cutting part initially pierces the annulus fibrosus, due to the limited meshing stroke of the gear component 5 and the rack component, the gear component 5 automatically disengages from the rack component, thus precisely controlling the puncture depth and preventing errors caused by purely manual puncture. Furthermore, the design of the arc-shaped blade 15 enables complete penetration of the annulus fibrosus, completing the tear formation in one step. The protective sheath 20 acts as a protective cover before cutting, preventing damage to surrounding tissue during the insertion of the device.

[0053] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A disposable annulus puncture forming device for absorbing and cutting a fiber ring, characterized by, It includes a sleeve, a cutting rod, and an adsorption assembly, wherein the cutting rod is inserted through and slidably connected inside the sleeve, and the adsorption assembly is disposed at the first end of the sleeve; The first end of the cutting rod is close to the first end of the sleeve and has a piercing cutting part, and the second end of the cutting rod extends out of the second end of the sleeve; The cutting rod has a rack portion on one side, and the rack portion has a plurality of first meshing teeth along the axial direction of the cutting rod; a gear component is rotatably connected to the sleeve at a position corresponding to the rack portion, and a plurality of second meshing teeth are provided on one side of the gear component for meshing with the first meshing teeth; The cutting rod is provided with an external thread, and the sleeve is provided with an internal thread. In the initial state, the perforation cutting part is located inside the sleeve, the rack part and the gear part are not engaged, and the external thread part is located on the side of the internal thread part away from the first end of the sleeve; During operation, the fiber ring is adsorbed by the adsorption component, and the gear is rotated to mesh with the rack, thereby driving the cutting rod to move toward the first end of the sleeve, so that the perforation cutting part extends out of the first end of the sleeve and pierces the fiber ring. After the gear rotates to disengage from the rack, the external threaded part moves to abut against the internal threaded part. The second end of the cutting rod is rotated to engage the external threaded part with the internal threaded part, thereby driving the cutting rod to move spirally toward the first end of the sleeve, so that the perforation cutting part spirally cuts the fiber ring.

2. The annulus fibrosus disposable breach forming device of claim 1, wherein, The first end of the sleeve is provided with an annular groove, and the adsorption component is disposed in the annular groove.

3. The annulus fibrosus disposable breach forming device of claim 2, wherein, The adsorption assembly includes an annular distribution tube, several nozzles, an extension tube, and an air intake assembly. The annular distribution tube is disposed within the annular groove, and the several nozzles are disposed on the side of the annular distribution tube facing the first end of the sleeve. The side wall of the sleeve is provided with a receiving hole extending from its first end to its second end, and the receiving hole communicates with the annular groove. The extension tube is disposed within the receiving hole, with one end connected to the annular distribution tube and the other end extending out of the second end of the sleeve and connected to the air intake assembly.

4. The fiber ring one-time perforation forming device according to claim 1, characterized in that, The rack portion is provided with four first meshing teeth, and the gear component is provided with four second meshing teeth.

5. The fiber ring one-time perforation forming device according to claim 1, characterized in that, The hole-breaking cutting section includes several arc-shaped blades, which are circumferentially spaced at the first end of the cutting rod. The open end of each arc-shaped blade is a spike, and the spike has cutting edges on both sides.

6. The fiber ring one-time perforation forming device according to claim 1, characterized in that, The sleeve has a notch on one side, and a connecting plate is provided on both sides of the notch on the outer wall of the sleeve. A rotating shaft is rotatably connected between the two connecting plates. The gear is sleeved and fixed to the rotating shaft. The gear meshes with the rack through the notch.

7. The fiber ring one-time perforation forming device according to claim 6, characterized in that, One end of the rotating shaft is provided with a first handle.

8. The fiber ring one-time perforation forming device according to claim 1, characterized in that, The second end of the cutting rod is provided with a second handle.

9. The fiber ring one-time perforation forming device according to claim 1, characterized in that, The cutting rod has a step on one side, and the rack is located on the step.

10. The fiber ring one-time perforation forming device according to claim 1, characterized in that, The first end of the sleeve is provided with a protective sleeve made of silicone or rubber, the shape of which is consistent with the sleeve, and the adsorption component is disposed on the protective sleeve.

Images