Fibrous ring stitching instrument capable of realizing continuous stitching and use method of fibrous ring stitching instrument

Abstract

The invention relates to the technical field of medical apparatus and instruments, and provides a fibrous ring stitching instrument capable of performing continuous stitching and a use method.The stitching instrument comprises a handle assembly, an outer tube, an inner tube, a stitching needle and a pushing mechanism; one end of the outer tube is connected with the handle assembly, the other end of the outer tube is connected with the suture needle, and the suture needle is provided with an inner cavity; the inner tube is arranged in the outer tube and extends into an inner cavity of the suture needle, and a first cavity is formed between the inner tube and the outer tube; a first winding bar and a second winding bar are sequentially contained in an inner cavity of the suture needle and the inner tube in the axial direction away from the suture needle, the pushing mechanism is arranged in the handle assembly and comprises a pushing head operably stretching out of the handle assembly and a pushing rod connected with the pushing head, and the pushing rod stretches into the inner tube. According to the scheme, all the steps can be completed in two times of puncture only by operating the pushing mechanism, the suture process is greatly simplified, and the operation time is shortened.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a continuous suture annulus fibrosus suture device and its method of use. Background Technology

[0002] With an aging population, the number of surgeries for herniated discs is increasing. In discectomy, surgeons need to create a regular surgical incision in the annulus fibrosus to remove the diseased tissue. Unlike spontaneous, irregular tears that are difficult to suture, this type of artificial incision has clear edges and is suitable for suturing. If not sutured post-operatively, this incision will become a persistent weak point, making it easy for residual nucleus pulposus to protrude again, a significant cause of post-operative recurrence. Therefore, actively suturing this incision is crucial for restoring the integrity of the annulus fibrosus and reducing the risk of recurrence. Currently, universal instruments are inconvenient to use, and traditional suturing methods require multiple punctures and sutures in a confined space to form a single knot, making the procedure cumbersome and risky. For small incisions that typically require only one effective suture to close, current techniques are relatively inefficient.

[0003] Therefore, there is an urgent need for a specialized instrument designed for intervertebral disc annulus fibrosus suture, capable of deep intervertebral disc manipulation and reliably sutured with minimal steps, in order to improve surgical efficiency and safety and effectively reduce postoperative recurrence rate. Summary of the Invention

[0004] To address the problems existing in the background art, this invention proposes a continuous suture annulus fibrosus suture device and its usage method. Users do not need to frequently thread needles or change instruments in a confined space. They can complete all steps in two punctures simply by operating the pushing mechanism, which greatly simplifies the suturing process and shortens the operation time.

[0005] To achieve the above objectives, the present invention adopts the following solution: A continuous suture loop suture device includes a handle assembly, an outer tube, an inner tube, a suture needle, and a pushing mechanism. One end of the outer tube is connected to the handle assembly, and the other end of the outer tube is connected to the suture needle, which has an inner cavity. The inner tube is axially movable within the outer tube, with one end extending into the inner cavity of the suture needle and the other end extending into the handle assembly and connected to the pushing mechanism. A first cavity is formed between the inner tube and the outer tube. A first suture bar and a second suture bar are sequentially housed in the inner cavity of the suture needle and the inner tube along an axial direction away from the suture needle. The first suture bar is connected to a first suture thread, and the second suture bar is connected to a second suture thread. The pushing mechanism is located within the handle assembly and includes a pushing head that can be operably extended from the handle assembly and a push rod connected to the pushing head, the push rod extending into the inner tube; the pushing mechanism is used to drive the push rod and the inner tube to move in two stages, sequentially pushing the first suture bar and the second suture bar out of the suture needle.

[0006] Optionally, the first suture bar is housed in the inner cavity of the suture needle, the second suture bar is housed in the end of the inner tube, and the end of the push rod near the suture needle abuts against the second suture bar.

[0007] Optionally, the pushing mechanism includes a state switching component, which is used to switch between a first pushing state and a second pushing state. In the first pushing state, the pushing head is operated to drive the push rod, the inner tube, and the second suture bar to move together by a first stroke, so as to push the first suture bar out of the suture needle. In the second pushing state, the pushing head is operated to drive the push rod to move by a second stroke greater than the first stroke, while the inner tube follows the first stroke to push the second suture bar out of the inner tube and the suture needle.

[0008] Optionally, the pushing mechanism further includes a housing, a tubular inner tube seat, a first spring, and a second spring; the housing is fixed inside the handle assembly, and the tubular inner tube seat, the first spring, and the second spring are located inside the housing; the first spring and the second spring are sequentially sleeved on the push rod along an axial direction away from the outer tube; the tubular inner tube seat is sleeved outside the second spring, one end of the tubular inner tube seat abuts against the first spring and is fixed to the end of the inner tube, and two slots are formed opposite to each other on the side wall of the other end of the tubular inner tube seat; the pushing head is slidably inserted through the handle assembly and the housing, with one end extending into the tubular inner tube seat, and a protrusion is provided on the side wall of the pushing head between the tubular inner tube seat and the housing, the protrusion slidingly engaging with the slot; the state switching component is composed of the protrusion and the slot.

[0009] Optionally, the handle assembly includes a detachably connected upper handle cover and a lower handle cover; the housing includes an upper housing and a lower housing that are interlocked and fixed to the upper handle cover and the lower handle cover, respectively.

[0010] Optionally, the end of the push head extending beyond the handle assembly is provided with a rotation indicator mark, and the outer side wall of the handle assembly is provided with a first state position mark and a second state position mark that cooperate with the rotation indicator mark, corresponding to the first push state and the second push state, respectively.

[0011] Optionally, the outer periphery of the push head is provided with two axially extending recesses, and the handle assembly is provided with an elastic ball. The ball head of the elastic ball abuts against the outer periphery of the push head radially. The elastic ball cooperates with the recesses, and the two recesses are distributed circumferentially, with their positions corresponding to the first push state and the second push state, respectively. When the push head is rotated to either state, the ball head of the elastic ball engages in the corresponding recess for rotational positioning.

[0012] Optionally, the first suture and the second suture extend through the first cavity into the handle assembly.

[0013] A method of using a continuous suture annulus fibrosus suture device includes the following steps: Step 1, piercing the suture needle through one side of the annulus fibrosus incision; Step 2, operating the pushing mechanism to a first pushing state, then pressing the pushing head to drive the push rod, inner tube, and second suture bar to move together for a first stroke, pushing the first suture bar and its connected first suture out of the suture needle and leaving it outside the annulus fibrosus; Step 3, withdrawing the suture needle from the annulus fibrosus; Step 4, piercing the suture needle again through the other side of the annulus fibrosus incision; Step 5: operating the pushing mechanism to a second pushing state, then pressing the pushing head to drive the push rod to move for a second stroke, while the inner tube follows the first stroke, pushing the second suture bar and its connected second suture out of the suture needle and inner tube and leaving it outside the annulus fibrosus; Step 6: withdrawing the suture needle from the annulus fibrosus, tightening the first and second sutures, tying a knot outside the incision to complete the suture.

[0014] The beneficial effects of this invention are as follows: First, this solution integrates two sutures into the suture device in advance through a double-thread built-in, step-by-step suturing method. Users do not need to frequently thread needles or change instruments in a confined space. They can complete all steps in two punctures simply by operating the pushing mechanism, which greatly simplifies the suturing process and shortens the operation time.

[0015] Furthermore, the pushing mechanism, through the cooperation of the state switching component—the protrusion and the slot—combined with the compression of the first and second springs, allows switching between the first and second pushing states by rotating the pushing head. Each press of the pushing head precisely limits the stroke of the push rod and inner tube, ensuring that the first and second thread bars are pushed out sequentially. The cooperation of the recess and the elastic ball provides positional control, and the inclusion of a rotation indicator prevents misoperation, ensuring the reliability and safety of the sewing operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a cross-sectional view of the handle assembly in an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the handle assembly in an embodiment of the present invention; Figure 5 for Figure 1 Enlarged view of point A in the middle.

[0017] The following are the labeling elements in the diagram: 1. Handle assembly; 2. Outer tube; 3. Inner tube; 4. Suture needle; 5. Push head; 6. Housing; 7. Tubular inner tube seat; 8. First spring; 9. Second spring; 10. Slot; 11. Protrusion; 12. Recess; 13. Elastic ball bearing; 14. First cavity; 15. First thread bar; 16. Second thread bar; 17. Push rod; 18. Rotation indicator. Detailed Implementation

[0018] To make the present invention clearer and more understandable, the present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the given embodiments are only one implementation method and do not represent all embodiments.

[0019] Example 1 Combination Figures 1-5 The present invention provides a continuously sutureable annular fiber suture device, comprising a handle assembly 1, an outer tube 2, an inner tube 3, a suture needle 4, and a pushing mechanism; One end of the outer tube 2 is connected to the handle assembly 1, and the other end of the outer tube 2 is connected to the suture needle 4, which has an inner cavity. The inner tube 3 is axially movable inside the outer tube 2, with one end extending into the inner cavity of the suture needle 4 and the other end extending into the handle assembly 1 and connected to the pushing mechanism. A first cavity 14 is formed between the inner tube 3 and the outer tube 2. A first suture bar 15 and a second suture bar 16 are sequentially housed in the inner cavity of the suture needle 4 and the inner tube 3 along an axial direction away from the suture needle 4. The first suture bar 15 is connected to a first suture thread, and the second suture bar 16 is connected to a second suture thread. The pushing mechanism is located inside the handle assembly 1 and includes a pushing head 5 that can be operably extended out of the handle assembly 1 and a push rod 17 connected to the pushing head 5. The push rod 17 extends into the inner tube 3. The pushing mechanism is used to drive the push rod 17 and the inner tube 3 to move in two stages, sequentially pushing out the first thread bar 15 and the second thread bar 16 from the suture needle 4.

[0020] Preferably, the first suture bar 15 is housed within the inner cavity of the suture needle 4, and the second suture bar 16 is housed within the end of the inner tube 3. The first suture bar 15 and the second suture bar 16 are housed separately within two structures, facilitating safe and stable sequential ejection and preventing the second suture bar 16 from slipping during the first movement of the pushing mechanism. It should be noted that the second suture bar 16 may also be partially housed within the inner cavity of the suture needle 4. Furthermore, the end of the push rod 17 near the suture needle 4 abuts against the second suture bar 16, facilitating the second suture bar 16 being ejected from the inner tube 3 by the push rod 17 during the second movement of the pushing mechanism.

[0021] Specifically, the pushing mechanism includes a state switching component, which is used to switch between a first pushing state and a second pushing state. In the first pushing state, the pushing head 5 is operated to drive the push rod 17, the inner tube 3, and the second suture bar 16 to move together by a first stroke, so as to push the first suture bar 15 out of the suture needle 4. In the second pushing state, the pushing head 5 is operated to drive the push rod 17 to move by a second stroke greater than the first stroke, while the inner tube 3 follows the first stroke to push the second suture bar 16 out of the inner tube 3 and the suture needle 4.

[0022] Furthermore, the pushing mechanism mainly includes a housing 6, a tubular inner tube seat 7, a first spring 8, and a second spring 9. The housing 6 is fixedly installed inside the handle assembly 1 as a basic frame. One end of the push rod 17 extends into the inner tube 3, and the other end is fixed to the pushing head 5. Inside the housing 6, the first spring 8 and the second spring 9 are sequentially sleeved on the push rod 17, arranged along the axial direction away from the outer tube 2. A tubular inner tube seat 7 is further sleeved outside the second spring 9. One end of the tubular inner tube seat 7 abuts against the first spring 8 and is fixed to the end of the inner tube 3, preventing the inner tube 3 from entering the tubular inner tube seat 7; two slots 10 are formed on the side wall of the other end near the pushing head 5. The push head 5 is slidably inserted into the handle assembly 1 and the housing 6. Its end extending into the housing 6 is located within the tubular inner tube seat 7. Two protrusions 11 are provided on the side wall of the push head 5 between the tubular inner tube seat 7 and the housing 6. These two protrusions 11 are slidably engaged with two slots 10. The protrusions 11 are confined within the housing 6, limiting the distance the push head 5 is pushed out when the spring returns, thus maintaining the push head 5 in its axial direction and ensuring the accuracy of the pushing mechanism. It should be noted that, to facilitate the compression of the second spring 9, preferably, the slots 10 can extend to the middle position of the second spring 9 in its natural state.

[0023] The state switching component is composed of the protrusion 11 and the slot 10. Furthermore, the end of the push head 5 extending out of the handle assembly 1 is provided with a rotation indicator 18. The outer side wall of the handle assembly 1 is provided with a first state position mark and a second state position mark that cooperate with the rotation indicator 18, respectively corresponding to the first push state and the second push state.

[0024] Specifically, the working principle of the push mechanism is as follows: When the push head 5 is rotated, causing the rotation indicator 18 to indicate the first state position, the protrusion 11 on the push head 5 is offset from the slot 10 (i.e., the protrusion 11 is located between the tubular inner tube seat 7 and the housing 6 outside the slot 10), and the entire mechanism is in the first pushing state. When the push head 5 is pressed, since the protrusion 11 cannot slide in the slot 10, the movement of the push head 5 will drive the entire tubular inner tube seat 7 to move together. The tubular inner tube seat 7 compresses the first spring 8, thereby driving the push rod 17, the inner tube 3, and the second thread bar 16 to move forward together by a short first stroke, which is just enough to push out the first thread bar 15 located at the front of the suture needle 4.

[0025] When the second thread bar 16 needs to be pushed, the push head 5 can be rotated so that the rotation indicator 18 indicates the second state position mark. At this time, the protrusion 11 is aligned with the slot 10 on the tubular inner tube seat 7. At this time, the protrusion 11 can slide into the slot 10, and the mechanism switches to the second pushing state. In this state, pressing the push head 5 again, since the protrusion 11 is embedded in the slot 10, the push head 5 is compressed by the second spring 9, and at the same time, it drives the tubular inner tube seat 7 to move synchronously and compress the first spring 8. The inner tube 3, which is fixed to the tubular inner tube seat 7, moves with it, completing the first stroke of compressing the first spring 8, while the push rod 17, which is fixed to the push head 5, receives a greater pushing force, realizing the second stroke of simultaneous compression of the first spring 8 and the second spring 9. Then, after the second thread bar 16 completes the first stroke with the inner tube 3, it is pushed out of the inner tube 3 by the push rod 17 under the compression of the second spring 9, and finally pushes out the suture needle 4. This embodiment can realize the switching between two pushing states with a single mechanism. The structure is simple and can reduce the failure rate of the equipment, thereby reducing the later maintenance cost.

[0026] Furthermore, this embodiment also includes a limiting structure to restrict the rotation of the push head 5. Specifically, the outer periphery of the push head 5 is provided with two axially extending recesses 12, and the handle assembly 1 is provided with an elastic ball 13. The ball head of the elastic ball 13 abuts against the outer periphery of the push head 5 radially. The elastic ball 13 cooperates with the recesses 12, and the two recesses 12 are distributed circumferentially, their positions corresponding to the first push state and the second push state, respectively. When the push head 5 is rotated to either state, the ball head of the elastic ball 13 engages with the corresponding recess 12 to achieve rotational positioning of the push head 5.

[0027] Specifically, the first suture and the second suture extend through the first cavity 14 into the handle assembly 1 for easy storage of the sutures.

[0028] Therefore, this embodiment uses this suture device to reliably close the surgical incision on the annulus fibrosus, fundamentally reducing the recurrence rate and improving the long-term efficacy for patients.

[0029] Example 2 This embodiment provides a method for using a continuously sutureable annular fiber suture device, including the following steps: Step 1: Insert the suture needle 4 through one side of the annulus fibrosus incision; Step 2: Rotate the push head 5 so that the rotation indicator 18 indicates the first state position mark. The ball head of the elastic ball 13 is inserted into the corresponding recess 12, limiting the rotation of the push head 5. At this time, the mechanism is in the first push state. Then, press the push head 5, and the tubular inner tube seat 7 compresses the first spring 8, driving the push rod 17, inner tube 3 and second thread bar 16 to move together for a first stroke, pushing the first thread bar 15 and the first suture connected to it out of the suture needle 4 and leaving it outside the annulus fibrosus. Step 3: Remove the suture needle 4 from the annulus fibrosus; Step 4: Insert the suture needle 4 through the other side of the annulus fibrosus incision again; Step 5: Rotate the push head 5 so that the rotation indicator 18 indicates the second state position mark. The ball head of the elastic ball 13 is inserted into the recess 12 corresponding to the second push state, limiting the rotation of the push head 5. At this time, the mechanism is in the second push state. Then press the push head 5, the push head 5 compresses the second spring 9, the tubular inner tube seat 7 compresses the first spring 8, and drives the push rod 17 to move a second stroke. At the same time, the inner tube 3 follows and moves a first stroke, pushing the second thread bar 16 and the second suture connected to it out of the inner tube 3 and the suture needle 4.

[0030] Step 6: Withdraw the suture needle 4 from the fiber ring, tighten the first and second sutures, tie a knot outside the incision, and complete the suturing.

[0031] This embodiment uses a double-thread built-in, step-by-step suturing method, pre-integrating two sutures inside the suture device. Users do not need to frequently thread needles or change instruments in a confined space. They can complete all steps in two punctures simply by operating the pushing mechanism, which greatly simplifies the suturing process and shortens the operation time.

[0032] The specific 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 described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A continuously suture-able annuloplasty device, comprising: The handle assembly (1), the outer tube (2), the inner tube (3), the suture needle (4) and the pushing mechanism are included. One end of the outer tube (2) is connected with the handle assembly (1), the other end of the outer tube (2) is connected with the suture needle (4), the suture needle (4) has an inner cavity; the inner tube (3) is movably arranged in the outer tube (2) along the axial direction, one end of the inner tube (3) extends into the inner cavity of the suture needle (4), the other end of the inner tube (3) extends into the handle assembly (1) and is connected with the pushing mechanism, the first cavity (14) is formed between the inner tube (3) and the outer tube (2); the inner cavity of the suture needle (4) and the inner tube (3) sequentially accommodate the first wire rod (15) and the second wire rod (16) along the axial direction away from the suture needle (4); The pushing mechanism is arranged in the handle assembly (1) and includes a pushing head (5) operatively extending out of the handle assembly (1) and a push rod (17) connected with the pushing head (5), the push rod (17) extends into the inner tube (3); the pushing mechanism is used for driving the push rod (17) and the inner tube (3) to move twice to sequentially push the first wire rod (15) and the second wire rod (16) out of the suture needle (4).

2. The continuously suture-able annuloplasty device according to claim 1, characterized in that: The first wire rod (15) is accommodated in the inner cavity of the suture needle (4), the second wire rod (16) is accommodated in the end of the inner tube (3), and one end of the push rod (17) close to the suture needle (4) abuts against the second wire rod (16).

3. A continuously suture-able annuloplasty device according to claim 2, wherein: The pushing mechanism includes a state switching assembly, the state switching assembly is used for switching between a first pushing state and a second pushing state; in the first pushing state, operating the pushing head (5) drives the push rod (17), the inner tube (3) and the second wire rod (16) to move a first stroke to push the first wire rod (15) out of the suture needle (4); in the second pushing state, operating the pushing head (5) drives the push rod (17) to move a second stroke greater than the first stroke, and the inner tube (3) moves the first stroke to push the second wire rod (16) out of the inner tube (3) and the suture needle (4).

4. The continuously suture-able annuloplasty device according to claim 3, characterized in that: The pushing mechanism further comprises a containing housing (6), a tubular inner tube seat (7), a first spring (8) and a second spring (9); the containing housing (6) is fixed in the handle assembly (1), and the tubular inner tube seat (7), the first spring (8) and the second spring (9) are located in the containing housing (6); the first spring (8) and the second spring (9) are sequentially sleeved on the push rod (17) in the axial direction away from the outer tube (2); the tubular inner tube seat (7) is sleeved outside the second spring (9), one end of the tubular inner tube seat (7) abuts against the first spring (8) and is fixed with the end of the inner tube (3), and two slot holes (10) are oppositely formed in the side wall of the other end of the tubular inner tube seat (7); the pushing head (5) is slidably arranged in the handle assembly (1) and the containing housing (6), one end of the pushing head (5) extends into the tubular inner tube seat (7), a convex body (11) is arranged on the side wall between the tubular inner tube seat (7) and the containing housing (6), the convex body (11) is in sliding cooperation with the slot hole (10), and the state switching assembly is composed of the convex body (11) and the slot hole (10).

5. A continuously suture-able annuloplasty device according to claim 4, characterized in that: The handle assembly (1) comprises a handle upper cover and a handle lower cover which are detachably connected; the containing housing (6) comprises an upper housing and a lower housing which are fixedly buckled with each other and are respectively fixed to the handle upper cover and the handle lower cover.

6. A continuously suture-able annuloplasty device according to claim 5, wherein: An end portion of the pushing head (5) extending out of the handle assembly (1) is provided with a rotation indication mark (18), and a first state position mark and a second state position mark which are matched with the rotation indication mark (18) are arranged on the outer side wall of the handle assembly (1) and correspond to the first pushing state and the second pushing state respectively.

7. A continuously suture-able annuloplasty device according to claim 6, wherein: The outer periphery of the pushing head (5) is provided with two axially extending recesses (12), and an elastic bumping bead (13) is arranged in the handle assembly (1), wherein the ball head of the elastic bumping bead (13) abuts against the outer periphery of the pushing head (5) in the radial direction of the pushing head (5); the elastic bumping bead (13) is matched with the recess (12), and the two recesses (12) are distributed in the circumferential direction and correspond to the first pushing state and the second pushing state respectively, when the pushing head (5) is rotated to any state, the ball head of the elastic bumping bead (13) is clamped into the corresponding recess (12) for realizing rotation positioning.

8. The continuously suture-able annuloplasty device according to claim 1, wherein: The first wire rod (15) is connected with a first suture, the second wire rod (16) is connected with a second suture, and the first suture and the second suture extend into the handle assembly (1) through the first cavity (14).

9. A method of using a continuous suture annuloplasty device according to any one of claims 1-8, wherein, The method comprises the following steps: Step 1, the suture needle (4) is pierced through one side of the annular fibrosus incision; Step 2, the pushing mechanism is operated to be in the first pushing state, then the pushing head (5) is pressed to drive the push rod (17), the inner tube (3) and the second wire rod (16) to move a first stroke, the first wire rod (15) and the first suture connected therewith are pushed out of the suture needle (4) and left outside the annular fibrosus; Step 3: the suture needle (4) is withdrawn from the annulus fibrosis; Step 4: the suture needle (4) is again punctured through the other side of the annulus fibrosis incision; Step 5: the push mechanism is operated to switch to the second push state, then the push head (5) is pressed to drive the push rod (17) to move a second stroke, while the inner tube (3) moves a first stroke, so that the second wire rod (16) and the second suture connected thereto are pushed out of the inner tube (3) and the suture needle (4) and left outside the annulus fibrosis; Step 6: the suture needle (4) is withdrawn from the annulus fibrosis, the first suture and the second suture are pulled tight, and knots are tied outside the incision to complete the suture.

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