Minimally invasive suture threading device for orthopedics department

Abstract

The utility model relates to a minimally invasive suture threading device for the orthopedics department. The minimally invasive suture threading device comprises a handheld part, an extension section and a suture threading part, the lead part is provided with a U-shaped hook, and the U-shaped hook sequentially comprises a connecting section, an arc-shaped section and a straight section; a lead groove is formed between the straight section and the connection section; the straight section is of a circular truncated cone structure. Compared with the prior art, the utility model has the beneficial effects that the lead part with a special structure is arranged, and the groove width of the lead groove is ensured as much as possible under the condition that the section length of the lead part is reduced, so that the lead part can smoothly penetrate through a small-aperture bone measuring hole, and a suture line is not influenced to enter the lead groove; a high-strength implant stainless steel material is adopted, the head is tapered, a taper part can be conveniently bent into a conventional hook by special process equipment, the strength of the hook is ensured, the hook can smoothly penetrate through a suture from a bone side hole, the operation time is greatly shortened, the pain of a patient is greatly reduced, and unnecessary troubles and risks of medical staff are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an orthopedic minimally invasive suture passer. Background Art

[0002] In orthopedic surgery, during the installation of implanted devices, the surgery is generally performed through a minimally invasive small incision to ensure stable and effective device implantation, prevent unnecessary tissue damage and patient pain, and speed up postoperative recovery time. Suture binding is often used, but due to the narrow incision of minimally invasive surgery, the small field of view and the very limited scope of surgical operation, there is a lack of tools for suture threading in minimally invasive incisions, making the operation very inconvenient and difficult to ensure the expected results of the surgery, which greatly reduces the efficiency of the surgery and also increases the pain of the patient.

[0003] However, if there is a minimally invasive suture passer that can be reasonably designed to have higher precision and greater flexibility, and is easy to operate, and can be used for soft tissue suturing in minimally invasive surgeries in various parts of the body, it will help doctors more efficiently complete soft tissue repair and fracture fixation surgeries through minimally invasive incisions, providing patients with good surgical results and rapid postoperative recovery guarantees.

[0004] In the past, thinner wires were used to pass through the through hole on the side of the bone rod, and then tools were used to bend the wire head. Since the wire is thin but very difficult to bend, it often breaks when bent, or it is too large to pass through the through hole on the side of the bone rod. Even after bending, the hook needs to be passed through the through hole on the side of the bone rod very carefully and slowly. Since the bone hole is only 2.0mm, the wire needs to be very thin. The thinner the wire, the more difficult it is to bend. In addition, it is easy to deform when passing through the side hole of the bone, resulting in failure of insertion. It often needs to be repeated many times, which brings great inconvenience to the operation. Although the wire does not break after being bent, fatigue damage has been caused to the bend of the wire. During the hooking process, the hook part will break and remain in the middle of the bone shaft or in the medullary cavity. If the broken wire is not removed, it will lead to the risk of infection, inflammation and other complications for the patient. However, it is very difficult to remove it, and special removal tools are required, which brings great troubles and pain to medical staff and patients.

[0005] Therefore, it is necessary to design a minimally invasive suture passer that can pass through the narrow space of the bone hole to pull the suture, shorten the operation time, and reduce the pain of the patient. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model provides an orthopedic minimally invasive suture passer.

[0007] The above-mentioned problem of the utility model is solved by the following technical solutions:

[0008] An orthopedic minimally invasive suture passer, comprising a handheld part, an elongating section and a lead wire section which are connected in sequence; a U-shaped hook is arranged on the lead wire section, which sequentially includes a connecting section, an arc section and a straight section; a lead wire groove is formed between the straight section and the connecting section;

[0009] The straight section is a frustum structure.

[0010] The further setting of the above technical solution is that: the connecting section is a frustum structure and is connected to the elongating section and the arc section.

[0011] The further setting of the above technical solution is that: the narrowing directions of the straight section and the connecting section are arranged in the opposite direction.

[0012] The further setting of the above technical solution is that: a hemispherical guiding part is arranged at the head of the straight section.

[0013] The further setting of the above technical solution is that: the radial width of the lead wire section is 1.7 mm - 1.9 mm.

[0014] The further setting of the above technical solution is that: the handheld part is an annular ring, including a bent section and a handheld section connected to the elongating section, and the handheld section is connected to the elongating section through a squeezing section to form a ring.

[0015] The further setting of the above technical solution is that: a welding section is bent and connected to the end of the squeezing section, the welding section is parallel to the elongating section and can be in contact and connection with the elongating section.

[0016] The further setting of the above technical solution is that: the welding section and the elongating section are laser welded.

[0017] The further setting of the above technical solution is that: the bent section is an arc less than a semi-circle, and the handheld section is inclined relative to the elongating section.

[0018] The further setting of the above technical solution is that: the handheld part, the elongating section and the lead wire section are integrally made of high-strength implant stainless steel material.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. By setting a lead wire section with a special structure, while reducing the cross-sectional length of the lead wire section, the groove width of the lead wire groove is ensured as much as possible, so that the lead wire section can smoothly pass through the small-diameter bone measuring hole and does not affect the suture entering the lead wire groove;

[0021] 2. The high-strength implant stainless steel material is adopted, and the head has a grinding taper, which is convenient for bending the taper part with a special process equipment to form a hook, ensuring the strength of the hook, enabling the hook to smoothly pass the suture through the bone side hole, greatly shortening the operation time, and greatly reducing the pain of the patient and the unnecessary trouble and risk of medical staff. Brief Description of the Drawings

[0022] Figure 1 It is a structural schematic diagram of the present utility model.

[0023] Figure 2 It is Figure 1 an enlarged structural schematic diagram of part A in

[0024] Figure 3 It is Figure 1 an enlarged structural schematic diagram of part B in

[0025] Marked on the drawings: 100, elongation section;

[0026] 200, hand-held part; 210, bending section; 220, hand-held segment; 230, extrusion section; 240, welding section;

[0027] 300, lead wire part; 310, connection section; 320, arc section; 330, straight section; 340, guiding part; 301, lead wire groove. Detailed Description of the Preferred Embodiments

[0028] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following will, in conjunction with the drawings and preferred embodiments, detail the specific implementation manners, structures, features and their effects of the present utility model as follows.

[0029] As Figures 1-3 shown, the following embodiment discloses an orthopedic minimally invasive suture passer, which includes a hand-held part 200, an elongation section 100 and a lead wire part 300 connected in sequence; a U-shaped hook is provided on the lead wire part 300, which sequentially includes a connection section 310, an arc section 320 and a straight section 330; a lead wire groove 301 is formed between the straight section 330 and the connection section 310;

[0030] The straight section 330 is a frustum structure.

[0031] The above is the basic solution of this embodiment.

[0032] Specifically referring to Figure 1 shown, from the head to the tail of the passer are the lead wire part 300, the elongation section 100 and the hand-held part 200 in sequence, and the elongation section 100 provides the required length for the lead wire part 300.

[0033] During threading in the operation, pass the suture through the lead wire groove 301, and then operate the threading device to make the lead wire part 300 pass through the bone measuring hole, so that the suture in the lead wire groove 301 is also brought from one side of the bone measuring hole to the other side.

[0034] In this embodiment, for the convenience of threading, the lead wire groove 301 is an open groove, and the suture can be snapped into the groove from the opening part.

[0035] At the same time, in this embodiment, the straight section 330 is set in a frustum shape, and preferably the large diameter end is closer to the opening end. In this structure, the groove wall of the lead wire groove 301, at least the groove wall on the straight section 330, is an inclined line relative to the elongation section 100, and the end of this inclined line closer to the opening is closer to the opposite side. With this setting, when the suture enters the lead wire groove 301 and moves towards the opening side, it will be blocked by the inclined groove wall in the horizontal direction, so that the suture cannot smoothly escape from the opening side of the lead wire groove 301, which can ensure the position of the suture in the lead wire groove 301 to a certain extent.

[0036] Preferably, in this embodiment, the length of the connection section 310 is not shorter than that of the straight section 330.

[0037] To ensure the consistency of the lead wire groove 301, in this embodiment, the connection section 310 is a frustum structure and is connected to the elongation section 100 and the arc section 320.

[0038] Moreover, in this embodiment, the constriction direction of the straight section 330 and the constriction direction of the connection section 310 are set in the opposite direction.

[0039] The connection section 310 is set as a frustum, and the constriction direction is opposite to that of the straight section 330, so that the lead wire groove 301 formed between the connection section 310 and the straight section 330 is still a straight groove with a consistent groove width, but the direction of the straight groove is inclined relative to the elongation section 100. Specifically, refer to Figure 2 As shown, the advantage of this setting is that the consistent groove width enables the suture to smoothly slide into the lead wire groove 301 from the opening. During the threading process, if the suture wants to slide out of the lead wire groove 301, it needs to move along the inclined direction, which can prevent the suture from sliding out to a certain extent.

[0040] In this embodiment, in order to enable the suture to smoothly enter the lead wire groove 301, a hemispherical guiding part 340 is provided at the head of the straight section 330.

[0041] This guiding part 340 can form a flared shape at the opening position, so as to guide the suture into the lead wire groove 301.

[0042] During the operation, the bone measuring hole is only 2 mm. To ensure that the penetrator does not contact the hole wall of the bone measuring hole during the wire threading process, or can smoothly pass through the bone measuring hole, therefore, the cross-section of the penetrator needs to be smaller than that of the bone measuring hole. At least the cross-section of the wire threading part 300 is smaller than that of the bone measuring hole. The maximum dimension position of the wire threading part 300 is the radial width formed by the straight section 330, the connecting section 310, and the wire hole. In this embodiment, this width is set to 1.7 mm - 1.9 mm.

[0043] Preferably, in this embodiment, the width of the wire groove 301 in this radial direction is set to 0.6 mm. Since the wire groove 301 has a certain slope, its own width is greater than 0.6 mm, which can also meet the size requirements of the suture.

[0044] Preferably, in this embodiment, the hand-held part 200, the extension section 100, and the wire threading part 300 are integrally made of high-strength implant stainless steel material.

[0045] The specific implementation manner of the hand-held part 200 in this embodiment is as follows:

[0046] The hand-held part 200 is a circular ring, including a bent section 210 connected to the extension section 100 and a hand-held section 220. The hand-held section 220 is connected to the extension section 100 through an extrusion section 230 to form a ring.

[0047] To streamline the structure, usually when manufacturing the penetrator, a thinner metal wire is used. Its head is bent to form the wire threading part 300, and the tail is used for holding. However, since the metal wire is not convenient to hold, in this embodiment, the tail of the metal wire is bent to form a circular ring, and the user holds the circular ring, thus facilitating the use of the penetrator.

[0048] When the user holds it, the hand-held section 220 closely adheres to the palm. When applying force, the hand-held section 220 squeezes towards the extension section 100 side to tightly hold the hand-held part 200 in the palm.

[0049] To fix the hand-held part 200 and prevent the circular ring from deforming when being squeezed by the palm, the end of the extrusion section 230 is bent and connected with a welding section 240. The welding section 240 is parallel to the extension section 100 and can contact and connect with the extension section 100.

[0050] Preferably, the welding section 240 and the extension section 100 are laser welded.

[0051] In this embodiment, the welding section 240 and the extension section 100 are in line contact and welded through the outer periphery. When the holding section 220 is deformed toward the extension section 100 under the extrusion of the palm, the welding section 240 and the extrusion section 230 support it to reduce its deformation amount and ensure the consistency of the holding part.

[0052] Laser welding is an efficient and precise welding method that uses a laser beam with a high energy density as the heat source. Laser welding is one of the important aspects of the application of laser material processing technology. The welding process belongs to the heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses inward through heat conduction. By controlling parameters such as the width, energy, peak power, and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully applied to the precision welding of micro and small parts.

[0053] Due to the small size of the metal wire, laser welding can make the welding position more accurate and avoid affecting the lead part 300 at its head.

[0054] In order to make the holding part 200 adapt to the structure of the human hand for gripping, the bending section 210 is an arc less than a semi-circle, and the holding section 220 is inclined relative to the extension section 100.

[0055] Refer to Figure 1 and Figure 3 As shown, the holding section 220 is set to be inclined, so that the cross-section of the entire holding part 200 forms a structure similar to a triangle. The holding section 220 has different distances from the extension section 100 at different positions, so as to meet the gripping space of different palms.

[0056] Preferably, in this embodiment, the distance between the farthest end of the holding section 220 and the extension section 100 is preferably set to 26 mm, which can adapt to the operator's palm.

[0057] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention in any form. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An orthopedic minimally invasive suture passer, characterized in that: The device comprises a hand-held portion (200), an elongated section (100) and a lead portion (300) which are connected in sequence; the lead portion (300) is provided with a U-shaped hook, which comprises a connecting section (310), an arc section (320) and a straight section (330) in sequence; a lead groove (301) is formed between the straight section (330) and the connecting section (310); The straight section (330) is a truncated cone structure.

2. The orthopedic minimally invasive suture passer according to claim 1, characterized in that: The connecting section (310) is a truncated cone structure and is connected to the elongated section (100) and the arc section (320).

3. The orthopedic minimally invasive suture passer according to claim 2, characterized in that: The shrinking direction of the straight section (330) and the shrinking direction of the connecting section (310) are arranged in opposite directions.

4. The orthopedic minimally invasive suture passer according to claim 1, characterized in that: The head of the straight section (330) is provided with a hemispherical guide portion (340).

5. The orthopedic minimally invasive suture passer according to claim 1, characterized in that: The radial width of the lead part (300) is 1.7 mm-1.9 mm.

6. The orthopedic minimally invasive suture passer according to claim 1, characterized in that: The hand-held portion (200) is an annular ring, comprising a bending section (210) and a hand-held section (220) connected to the extension section (100); the hand-held section (220) is connected to the extension section (100) through the extrusion section (230) to form a ring shape.

7. The orthopedic minimally invasive suture passer according to claim 6, characterized in that: The end of the extrusion section (230) is bent and connected to a welding section (240); the welding section (240) is parallel to the elongated section (100) and can be in contact with and connected to the elongated section (100).

8. The orthopedic minimally invasive suture passer according to claim 7, characterized in that: The welding section (240) and the elongated section (100) are welded by laser.

9. The orthopedic minimally invasive suture passer according to claim 6, characterized in that: The bending section (210) is in an arc shape smaller than a semicircle, and the hand-held section (220) is arranged obliquely relative to the extension section (100).

10. The orthopedic minimally invasive suture passer according to any one of claims 1 to 9, characterized in that: The hand-held part (200), the extension section (100) and the lead part (300) are made of a high-strength implant stainless steel material in one piece.

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