Intervertebral disc stitching instrument capable of continuously stitching

Abstract

The intervertebral disc stitching instrument is characterized in that a thread end push rod in a puncture needle tube is provided with a groove used for containing a thread end, the far end of the puncture needle tube can contain another thread end, and a driving assembly used for pushing the thread end push rod is designed to be separated from the thread end push rod; after the first needle is pricked, the range extending shaft is additionally arranged between the driving assembly and the thread end push rod, equivalently, the thread end push rod is lengthened, so that the thread end push rod can be secondarily pushed by one driving assembly to perform secondary needle pricking, the risk of scratching tissues is reduced, and the needle pricking device is simple, convenient and rapid to use and operate, simple in structure and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to intervertebral disc suture instrument field, concretely relates to an intervertebral disc suture device of continuous suture. BACKGROUND

[0002] In the minimally invasive suture operation of deep soft tissue, the operation difficulty of the doctor is big by traditional hand-held curved needle, suture thread, if no special instrument is assisted, even cannot realize the suture operation, therefore, usually adopts the intervertebral disc suture device to suture. SUMMARY

[0003] In view of the deficiency of prior art, the utility model provides an intervertebral disc suture device of continuous suture, can improve suture efficiency and reduce the risk of tissue scratch.

[0004] To achieve the above object, the utility model is through following technical scheme:

[0005] The utility model provides an intervertebral disc suture device of continuous suture, comprising:

[0006] Suture needle assembly, it includes puncture needle tube and line head push rod, line head push rod is telescopically movable and is arranged in puncture needle tube, and the space for accommodating first line head is formed between the inside of the distal end of puncture needle tube and the distal end of line head push rod, and the recess for accommodating second line head is arranged on the one side of the distal end of line head push rod;

[0007] Handle shell, the proximal end of puncture needle tube is fixed in handle shell, and the proximal end of line head push rod is stretched out from the proximal end outside of puncture needle tube, and the movable hole for accommodating the proximal end of line head push rod is arranged in handle shell, and the installation slot communicating with movable hole is arranged on one side of movable hole;

[0008] Range increasing assembly, including range increasing shaft and first spring, range increasing shaft and first spring are placed in installation slot, and first spring is located on the one side of range increasing shaft away from movable hole, and first spring provides power for extruding range increasing shaft into movable hole;

[0009] The intervertebral disc suture device has the initial state that line head push rod and trigger button contact and the range increasing state that first spring extrudes range increasing shaft between line head push rod and trigger button after line head push rod moves towards the distal end;

[0010] The driving assembly is movably installed in the handle shell and used for pushing the thread push rod to move from the proximal end to the distal end to push the first thread out of the puncture needle tube in the initial state and pushing the range increasing shaft and the thread push rod to move from the proximal end to the distal end to push the second thread out of the puncture needle tube in the range increasing state.

[0011] Preferably, the proximal end of the thread push rod is in contact with the hole wall of the movable hole to avoid self movement of the thread push rod.

[0012] Preferably, the first spring is a square compression spring, the installation slot is provided with a square matching the structure of the square compression spring at the position corresponding to the square compression spring, the bottom of the installation slot is provided with a groove, and the end of the first spring away from the range increasing shaft is bent into a hook which hooks the side wall of the groove to fix the first spring.

[0013] Preferably, the distal end of the thread push rod is provided with an inclined surface facilitating the complete pushing of the first thread out of the puncture needle tube, and the groove wall of the groove of the thread push rod near the inclined surface of the distal end of the thread push rod is provided with an inclined surface facilitating the escape of the second thread from the groove.

[0014] In one of the schemes, the driving assembly comprises a firing button and a second spring, one end of the firing button is opposite to the proximal end of the thread push rod, the other end of the firing button extends out of the handle shell, the thread push rod can be pushed to move towards the distal end by pressing the firing button, and the second spring is sleeved outside the firing button to reset the firing button.

[0015] Preferably, the firing button is provided with a waist-shaped hole, and the handle shell is provided with a limiting pin penetrating into the waist-shaped hole.

[0016] Preferably, the movable length of the limiting pin in the waist-shaped hole is not less than the length of the range increasing shaft.

[0017] Preferably, the handle shell is provided with two through holes for the fingers of an operator to put in.

[0018] In one of the schemes, the driving assembly comprises a driving rod, an operating handle and a torsional spring, the distal end of the driving rod is opposite to the thread push rod, the operating handle is rotatably installed on the handle shell, the proximal end of the driving rod is hingedly connected to one end of the operating handle located inside the handle shell, the other end of the operating handle extends out of the handle shell, and one end of the torsional spring is fixed on the operating handle and the other end of the torsional spring is fixed on the handle shell.

[0019] Preferably, the handle shell is in the shape of a pistol, has a first part and a second part, the suture needle assembly, the range increasing assembly and the driving assembly are installed on the first part, the second part is a hand holding part, and the operating handle extends out of the first part and the second part.

[0020] The intervertebral disc suture device provided by the utility model has the following beneficial effects:

[0021] The thread push rod and the driving assembly are designed in a split mode, the range increasing assembly is arranged on one side of the thread push rod, the empty stroke between the thread push rod and the driving assembly is filled by the range increasing shaft after the thread push rod is pushed out for the first time, the thread push rod is equivalent to being lengthened, and then the second pushing is realized, and the risk of scratching the tissue is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of the first embodiment of the intervertebral disc suture device in an initial state;

[0023] Figure 2 is a schematic view of the first embodiment of the intervertebral disc suture device when the first needle is punched, and at this time, the first thread (not shown) is separated from the puncture needle tube;

[0024] Figure 3 is a schematic view of the first embodiment of the intervertebral disc suture device after the driving assembly is reset, and at this time, the range increasing shaft enters between the thread push rod and the driving assembly;

[0025] Figure 4 is a schematic view of the first embodiment of the intervertebral disc suture device when the second needle is punched, and at this time, the second thread is pushed out of the puncture needle tube.

[0026] Figure 5 is Figure 1 an enlarged view of A in the figure;

[0027] Figure 6 is Figure 2 an enlarged view of B in the figure;

[0028] Figure 7 is Figure 4 an enlarged view of C in the figure;

[0029] Figure 8 is a schematic view of the second embodiment of the intervertebral disc suture device;

[0030] Figure 9 is a schematic view of the suture of the utility model. DETAILED DESCRIPTION

[0031] The utility model will be further described in combination with the drawings and embodiments.

[0032] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0033] First embodiment

[0034] As Figures 1 to 7 shown, the embodiment discloses an intervertebral disc suture device capable of continuous suture, comprising:

[0035] The suture needle assembly comprises a puncture needle tube 1 and a thread push rod 2, the thread push rod 2 is movably arranged in the puncture needle tube 1, a space for accommodating a first thread 3 is formed between the inner part of the distal end of the puncture needle tube 1 and the distal end of the thread push rod 2, and a groove 5 for accommodating a second thread 4 is arranged on one side of the distal end of the thread push rod (when in use, a suture thread is arranged in the puncture needle tube, as Figure 9 , the first thread 3 and the second thread 4 are arranged on the suture thread, the first thread 3 is located at the end of the suture thread, and a first thread coil 17 is arranged at the end of the suture thread; in other embodiments, two suture threads can be arranged in the puncture needle tube, one of the suture threads is provided with the first thread 3 and the first thread coil 17, and the other suture thread is provided with the second thread 3);

[0036] The handle shell 8 is arranged in the puncture needle tube 1, the proximal end of the thread push rod 2 is arranged outside the proximal end of the puncture needle tube 1, the handle shell 8 is internally provided with a movable hole for accommodating the proximal end of the thread push rod 2, the proximal end of the thread push rod 2 is in contact with the hole wall of the movable hole, so as to provide sufficient damping and avoid self movement of the thread push rod 2;

[0037] The range increasing assembly comprises a range increasing shaft 6 and a first spring 7, the handle shell 8 is provided with a mounting groove on one side of the movable hole, the mounting groove is communicated with the movable hole, the range increasing shaft 6 and the first spring 7 are arranged in the mounting groove, the first spring 7 is located on the side, away from the movable hole, of the range increasing shaft 6, and the first spring 7 provides power for extruding the range increasing shaft 6 into the movable hole;

[0038] The intervertebral disc suture device has an initial state in which the thread push rod 2 is in contact with the trigger button 9 and a range increasing state in which the first spring extrudes the range increasing shaft 6 into the space between the thread push rod 2 and the trigger button 9 after the thread push rod 2 moves towards the distal end.

[0039] The drive assembly, movably mounted in the handle housing 8, is used in the initial state to push the thread pusher 2 from the proximal end to the distal end to push the first thread 3 out of the puncture needle tube 1, and in the extended state to push the extended shaft 6 and the thread pusher 2 from the proximal end to the distal end to push the second thread 4 out of the puncture needle tube 1.

[0040] The drive assembly of this embodiment includes a firing button 9 and a resilient reset component. One end of the firing button 9 faces the proximal end of the wire push rod 2, and the other end extends outside the handle housing 8. Pressing the firing button 9 can push the wire push rod 2 to move to the distal end. The resilient reset component is used to reset the firing button 9. Specifically, the resilient reset component is a second spring 10 (or a disc spring or other elastic material). The handle housing 8 has a hole inside for accommodating the firing button 9. The second spring 10 is located in this hole, which communicates with the movable hole. The second spring 10 is sleeved on the outside of the firing button 9 and pushes against the firing button 9.

[0041] The firing button 9 has a slotted hole 11, and a limiting pin 12 is installed in the handle housing 8, which passes through the slotted hole 11. The slotted hole 11 and the limiting pin 12 cooperate to prevent the firing button 9 from dislodging from the handle housing 8. Preferably, the movable length of the limiting pin 12 in the slotted hole 11 is not less than the length of the range extender shaft 6. In other embodiments, other structures can also be used to prevent the firing button 9 from dislodging from the handle housing 8.

[0042] Preferably, the first spring 7 is a square compression spring, and the position of the square compression spring in the mounting groove is set in a square shape. This can prevent the first spring 7 from rotating and shifting. In addition, the bottom of the mounting groove is provided with a groove, and the end of the first spring 7 away from the range extender shaft 6 is bent into a hook 71. The hook 71 hooks onto the side wall of the groove, thereby fixing the first spring 7 in place and preventing the first spring 7 from swinging freely in the mounting groove after the second reset of the trigger button 9, which would affect the product's quality.

[0043] The distal end of the suture pusher 2 is a bevel 13. When the first needle is inserted into the tissue and the first suture 3 is pushed out, the distal bevel 13 of the suture pusher 2 will slightly protrude from the distal bevel 13 of the puncture needle tube 1, ensuring that the suture can be pushed out of the needle tube more completely when the first needle is injected.

[0044] The groove wall of the groove 5 on the thread push rod 2, which is used to accommodate the second thread end 4, near the inclined surface 13 at the far end of the thread push rod 2, is designed to facilitate the second thread end 4 to come out of the inclined surface 13 of the groove 5. In other words, the groove 5 helps to prevent the second thread end 4 from being hooked back when pushing the second needle.

[0045] To facilitate the application of force, the handle housing 8 has two through holes for the operator's fingers to insert.

[0046] The following is the procedure for using a continuous suture disc closure device:

[0047] In the initial state, such asFigure 1 The thread pusher 2 is housed inside the puncture needle tube 1. The first thread end 3 is hidden between the distal end of the thread pusher 2 and the inner cavity of the puncture needle tube 1, and the second thread end 4 is hidden between the groove 5 at the distal end of the thread pusher 2 and the inner cavity of the puncture needle tube 1. At this time, the first thread coil 17 is exposed outside the puncture needle tube 1, and the extension shaft 6 is hidden in the mounting groove on the proximal side of the thread pusher 2. After the first needle is inserted into the tissue, press the firing button 9. Figure 2 If the button 9 is pressed, it will push the thread pusher 2, which will push the first thread 3. The first thread 3 will fall outside the puncture needle tube 1, while the second thread 4 will remain hidden between the groove 5 at the distal end of the thread pusher 2 and the inner cavity of the puncture needle tube 1. After the puncture needle tube 1 is pulled out, the first thread 3 will be hidden inside the human tissue, while the first thread coil 17 will be exposed outside the tissue.

[0048] After pressing and releasing the fire button 9 for the first time, see Figure 3 At this time, the wire end push rod 2 moves a certain distance to the far end, while the firing button 9 is reset under the action of the second spring 10. A travel distance is left between the wire end push rod 2 and the firing button 9, and the extension shaft 6 is pushed into the movable hole by the first spring 7 to fill the empty part, which is equivalent to extending the wire end push rod 2.

[0049] Pass the puncture needle 1 through the first thread loop 17, insert the second needle into the tissue, and then press the firing button 9. Figure 4 Activating button 9 pushes the extension shaft 6, which in turn pushes the thread pusher 2. The thread pusher 2 pushes the second thread 4, which falls outside the puncture needle tube 1. After the puncture needle tube 1 is removed, the second thread 4 will pass through the first thread loop 17 and be hidden in the tissue. Subsequently, the intervertebral disc suture device will be removed, and the remaining suturing operations will be performed.

[0050] Second Embodiment

[0051] The handle housing and drive assembly of the intervertebral disc suturer provided in the second embodiment are different from those in the first embodiment, but the rest of the structure is the same. The same structure will not be described in detail here, and the usage principle is also the same as that in the first embodiment.

[0052] like Figure 8 The drive assembly in this embodiment includes a drive rod 14, an operating handle 15, and a torsion spring 16 (equivalent to the elastic reset component in the first embodiment). The distal end of the drive rod 14 faces the wire end push rod 2. The operating handle 15 is rotatably mounted on the handle housing 8. The proximal end of the drive rod 14 is hinged to one end of the operating handle 15 located inside the handle housing 8 via a pin. The other end of the operating handle 15 extends outside the handle housing 8. One end of the torsion spring 16 is fixed to the operating handle 15, and the other end is fixed to the handle housing 8. When the operating handle 15 is moved, it drives the drive rod 14 to push the wire end push rod 2 or the range extender shaft 6. The drive rod 14 in this embodiment is equivalent to the firing button 9 in the first embodiment.

[0053] The handle housing 8 is pistol-shaped and has a first part and a second part. The suture needle assembly, the range extender assembly and the drive assembly are installed in the first part, and the second part is the hand grip. The operating handle 15 extends from between the first part and the second part.

[0054] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A continuous intervertebral disc suture device, characterized in that, include: A suture needle assembly includes a puncture needle tube and a suture pusher, the suture pusher being telescopically movably disposed in the puncture needle tube, a space for receiving a first suture end being provided between the distal end of the puncture needle tube and the distal end of the suture pusher, and a groove for receiving a second suture end being provided on one side of the distal end of the suture pusher. The handle housing has the proximal end of the puncture needle tube fixed in it, and the proximal end of the thread push rod extends out of the proximal end of the puncture needle tube. The handle housing has an movable hole for accommodating the proximal end of the thread push rod, and a mounting groove communicating with the movable hole is provided on one side of the movable hole. The range extender assembly includes a range extender shaft and a first spring, which are placed in a mounting groove. The first spring is located on the side of the range extender shaft facing away from the movable hole and provides power to push the range extender shaft into the movable hole. The intervertebral disc suture device has an initial state in which the thread push rod contacts the firing button, and an extended state in which the first spring squeezes the extension shaft between the thread push rod and the firing button after the thread push rod moves to the distal end. A drive assembly, movably mounted in the handle housing, is used in the initial state to push the thread pusher from the proximal end to the distal end to push the first thread out of the puncture needle tube, and in the extended state to push the extended shaft and the thread pusher from the proximal end to the distal end to push the second thread out of the puncture needle tube.

2. The intervertebral disc suture device capable of continuous suturing according to claim 1, characterized in that, The near end of the wire end push rod contacts the wall of the movable hole to prevent the wire end push rod from moving on its own.

3. The intervertebral disc suture device capable of continuous suturing according to claim 1, characterized in that, The first spring is a square compression spring. The mounting groove is set in a square shape to match the structure of the square compression spring. The bottom of the mounting groove is provided with a groove. The end of the first spring away from the range extender shaft is bent into a hook. The hook hooks onto the side wall of the groove to fix the first spring.

4. The intervertebral disc suture device capable of continuous suturing according to claim 1, characterized in that, The distal end of the thread pusher is configured with an inclined surface to facilitate the complete ejection of the first thread from the puncture needle. The groove wall of the groove of the thread pusher for accommodating the second thread is configured with an inclined surface to facilitate the second thread from exiting the groove.

5. The intervertebral disc suture device capable of continuous suturing according to any one of claims 1 to 4, characterized in that, The drive assembly includes a firing button and a second spring. One end of the firing button faces the proximal end of the wire push rod, and the other end extends outside the handle housing. Pressing the firing button can push the wire push rod to the distal end. The second spring is sleeved on the outside of the firing button to reset the firing button.

6. The intervertebral disc suture device capable of continuous suturing according to claim 5, characterized in that, The firing button has a waist-shaped hole, and a limiting pin that passes through the waist-shaped hole is installed in the handle housing.

7. The intervertebral disc suture device capable of continuous suturing according to claim 6, characterized in that, The movable length of the limit pin in the oblong hole is not less than the length of the range extender shaft.

8. The intervertebral disc suture device capable of continuous suturing according to claim 5, characterized in that, The handle housing has two through holes for the operator's fingers to insert.

9. The intervertebral disc suture device capable of continuous suturing according to any one of claims 1 to 4, characterized in that, The drive assembly includes a drive rod, an operating handle, and a torsion spring. The distal end of the drive rod faces the wire end push rod. The operating handle is rotatably mounted on the handle housing. The proximal end of the drive rod is hinged to one end of the operating handle located inside the handle housing via a pin. The other end of the operating handle extends outside the handle housing. One end of the torsion spring is fixed to the operating handle, and the other end is fixed to the handle housing.

10. The intervertebral disc suture device capable of continuous suturing according to claim 9, characterized in that, The handle housing is pistol-shaped and has a first part and a second part. The suture needle assembly, the range extender assembly and the drive assembly are installed in the first part, and the second part is the hand grip. The operating handle extends from between the first part and the second part.

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