Flexible self-locking sternum ribbon and tightening device thereof

Abstract

The utility model discloses a flexible self-locking type sternum tie and a tightening device thereof, the flexible self-locking type sternum tie comprises a toothed belt and a tightening mechanism, one end of the toothed belt is provided with a lock catch, the other end of the toothed belt is provided with a puncture needle, the lock catch is provided with a square through hole, the square through hole is internally provided with an embedded sheet with a sharp corner at the end, and the outer wall of the toothed belt opposite to the embedded sheet is provided with a plurality of protrusions matched with the embedded sheet. The tightening mechanism comprises a handle, an ejector rod arranged at one end of the handle and a handle cover plate arranged at the other end of the handle, a cavity with a sliding block is formed in the handle, sliding grooves are formed in the upper end and the lower end of the handle, a locking knob penetrating through the sliding grooves to be in threaded connection is arranged at the upper end of the sliding block, and a U-shaped clamping groove is formed in the side face of the end close to the handle cover plate. The handle cover plate is in threaded connection with an adjusting knob, one end, located in the cavity, of the adjusting knob is provided with a circular stop block arranged in the U-shaped clamping groove, and notches are formed in the same horizontal plane of the same sides of the ejector rod, the handle and the sliding block. The dental implant can be self-locked, is good in biocompatibility, and can be developed under X-rays.

Description

Technical Field

[0001] This utility model relates to a sternal ligament, and more particularly to a flexible self-locking sternal ligament and its tightening device. Background Technology

[0002] Open-chest surgery requires longitudinally splitting the sternum. After the surgery, the separated sternum sections need to be closed using a fixation device. Currently, many clinical cases both domestically and internationally use metal wires for binding. However, metal wires have many problems in clinical use, such as easily causing cutting of the sternum, metal particles generated when the wire rubs against the bone causing bone resorption, improper twisting of the wire leading to breakage, and prolonged surgery time when using metal wire binding. These problems have persisted, negatively impacting both doctors and patients.

[0003] Authorization Announcement No. CN215534935U discloses a non-traumatic flexible sternal band with a self-locking structure. This patent includes a buckle and a band connected together. The buckle has a one-way spring piece integrally formed with the buckle. The band has several teeth that cooperate with the one-way spring piece. Although the structure is simple and simplifies the surgical procedure, the overall design of the band is made of metal. It does not fundamentally change the problem of metal wire binding. For example, it can still cause metal particles to be generated during friction, resulting in bone dissolution and poor biocompatibility.

[0004] Authorization announcement number CN215534935U discloses an orthopedic bandage locking and fixation device, which consists of a long, toothed bandage with stainless steel hooks and a buckle. The long, toothed bandage is made of polyetheretherketone (PEEK), with one end connected to the pointed stainless steel hook and the other end connected to the buckle with a one-way locking mechanism. However, the elastic locking teeth in the buckle are integrally molded from PEEK, and due to the limited space in the buckle, the locking teeth cannot theoretically be made too large. This means that during surgery, or after the bandage is implanted, if the force is too great or the force is applied incorrectly, the locking teeth are prone to failure, leading to surgical failure. Furthermore, PEEK is not radiolucent under X-rays, which hinders observation by doctors during later recovery examinations. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art by providing a flexible self-locking sternal ligation and its tightening device, which solves the problems of easy failure of the sternal ligation locking teeth, poor biocompatibility, and inability to be visualized under X-ray.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a flexible self-locking sternal band and its tightening device, comprising a toothed band and a tightening mechanism. One end of the toothed band is provided with a buckle, and the other end is provided with a puncture needle. The buckle has a square through hole, and an insert is provided in the square through hole near the toothed band. The insert has a pointed end. The outer wall of the toothed band near the buckle, opposite to the insert, has multiple protrusions that cooperate with the insert. The pointed end of the insert rests against the protrusions. The tightening mechanism includes a handle, a push rod provided at one end of the handle, and a push rod provided at the other end of the handle. The handle cover has a cavity inside, with grooves at the upper and lower ends. A slider that can slide within the cavity is provided. A locking knob threaded through the groove is located at the upper end of the slider. A U-shaped groove is provided on the side near the handle cover. An adjustment knob is threaded on the handle cover. A circular stop is located at the end of the adjustment knob inside the cavity. The circular stop is located in the U-shaped groove. The top rod, handle, and slider all have slots on the same side. The three slots are connected and on the same horizontal plane. When the toothed belt is tightened, it is placed in the slot.

[0007] Furthermore, each of the four inner walls of the four-sided through hole is provided with at least one insert, and the outer wall around the end of the toothed belt near the buckle is provided with multiple protrusions that cooperate with the inserts.

[0008] Furthermore, two or more inserts are longitudinally arranged on the inner wall of the same side of the quadrangular through hole.

[0009] Furthermore, the protrusions are in the shape of dots or serrations.

[0010] Furthermore, the upper end of the slider is provided with a first scale line between the locking knob and the U-shaped groove, and the handle is provided with a second scale line on one side of the groove.

[0011] Furthermore, the connection between the puncture needle and the toothed belt is provided with an anti-rotation and anti-dislodgement mechanism. The anti-rotation and anti-dislodgement mechanism includes an I-shaped locking block at one end of the puncture needle and a locking groove at the other end of the toothed belt that cooperates with the I-shaped locking block. The locking block is disposed in the locking groove.

[0012] Furthermore, the puncture needle is arc-shaped and is made of medical-grade stainless steel or titanium alloy.

[0013] Furthermore, the insert is made of medical implant-grade metal material or titanium and titanium alloy or cobalt-chromium alloy or nickel-titanium alloy.

[0014] Furthermore, the buckle and toothed belt are made of polyetheretherketone material, and the insert, puncture needle, buckle and toothed belt are integrally injection molded.

[0015] The beneficial effects of the above-mentioned structure of this utility model are as follows: The flexible self-locking sternal band and its tightening device provided by this utility model tighten the toothed band by inserting the toothed band into the buckle. The tip of the insert rests on the protrusion of the long toothed band, which can prevent the toothed band from loosening and achieve self-locking. It is simple to operate, has good mechanical strength, is not easy to be damaged, and is sturdy and durable. Moreover, the buckle and toothed band are made of polyetheretherketone material, which has good biocompatibility and prevents the generation of metal particles and bone dissolution when the metal band is rubbed. The insert is made of metal material, which has high mechanical strength and is not easy to be damaged. It is more sturdy and durable than the polyetheretherketone elastic toothed band, and can be visualized under X-ray in vivo. Attached Figure Description

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the flexible self-locking sternal bandage described in this utility model.

[0018] Figure 2 This is a schematic diagram of the tightening device described in this utility model.

[0019] Figure 3 This is a schematic diagram of the tightening device of this utility model without the handle and the push rod.

[0020] Figure 4 This is a schematic diagram of the structure of the flexible self-locking sternal band with a circular protrusion described in this utility model.

[0021] Figure 5 This is a cross-sectional view of the flexible self-locking sternal band with a circular protrusion described in this utility model.

[0022] Figure 6 This invention relates to a schematic diagram of the flexible self-locking sternal band with serrated protrusions.

[0023] The components are: 1. Toothed belt; 2. Locking buckle; 3. Puncture needle; 4. Square through hole; 5. Insert; 6. Protrusion; 7. Handle; 8. Top rod; 9. Handle cover plate; 10. Slide groove; 11. Slider; 12. Locking knob; 13. U-shaped groove; 14. Adjustment knob; 15. Circular stop; 16. Groove; 17. First scale line; 18. Second scale line; 19. Locking block. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] In response to the needs of sternal bandages, the designer of this utility model has innovatively proposed a flexible self-locking sternal bandage and its tightening device, which is self-locking, has good biocompatibility, and is visible under X-ray.

[0026] like Figures 1 to 6 As shown, a flexible self-locking sternal band and its tightening device include a toothed band 1 and a tightening mechanism. One end of the toothed band 1 has a buckle 2, and the other end has a puncture needle 3. The buckle 2 has a square through hole 4, and an insert 5 is provided inside the square through hole 4 near the toothed band 1. The angle between the insert 5 and the inner wall of the square through hole 4 is 30-60 degrees, and the end of the insert 5 has a pointed tip. Multiple protrusions 6 that cooperate with the insert 5 are provided on the outer wall of the side of the toothed band 1 near the buckle 2 opposite to the insert 5. The pointed tip of the insert 5 rests below the protrusions 6. The tightening mechanism includes a handle 7, a push rod 8 at one end of the handle 7, and a handle cover plate 9 at the other end of the handle 7. The handle 7 and the handle cover plate 9 are screwed together. The handle 7 is connected by a threaded or interference fit. It has a cavity inside and a sliding groove 10 at the upper and lower ends. A slider 11 that can slide inside the cavity is provided. The upper end of the slider 11 is provided with a locking knob 12 that is threaded through the sliding groove 10. A U-shaped groove 13 is provided on the side near the handle cover plate 9. An adjustment knob 14 is threaded on the handle cover plate 9. A circular stop 15 is provided at the end of the adjustment knob 14 located inside the cavity. The circular stop 15 is set in the U-shaped groove 13. The top rod 8, the handle 7 and the slider 11 are all provided with slots 16 on the same side. The three slots 16 are connected and on the same horizontal plane. When the toothed belt 1 is tightened, the toothed belt 1 is placed in the slot 16.

[0027] At least one insert 5 is provided on each of the four inner walls of the four-sided through hole 4, and multiple protrusions 6 that cooperate with the insert 5 are provided on the outer wall of the toothed band 1 near the buckle 2.

[0028] Two or more inserts 5 are longitudinally arranged on the inner wall of the same side of the square through hole 4.

[0029] The protrusion 6 is in the shape of a dot or a serrated edge.

[0030] The upper end of the slider 11 is provided with a first scale line 17 between the locking knob 12 and the U-shaped groove 13, and the handle 7 is provided with a second scale line 18 on one side of the slide groove 10, so as to facilitate the adjustment of the tension of the sternal bandage.

[0031] The connection between the puncture needle 3 and the toothed belt 1 is provided with an anti-rotation and anti-detachment mechanism. The anti-rotation and anti-detachment mechanism includes an I-shaped locking block 19 at one end of the puncture needle 3 and a locking groove at the other end of the toothed belt 1 that cooperates with the I-shaped locking block 19. The locking block 19 is located in the locking groove to effectively prevent the puncture needle 3 from falling off.

[0032] The puncture needle 3 is arc-shaped and is made of medical stainless steel or titanium alloy.

[0033] The insert 5 is made of medical implant-grade metal material, titanium and titanium alloy, cobalt-chromium alloy, or nickel-titanium alloy, which is easy to visualize under X-ray.

[0034] The buckle 2 and the toothed belt 1 are made of polyetheretherketone material, which has good biocompatibility. The insert, puncture needle, buckle and toothed belt are integrally injection molded.

[0035] The upper end of the latch 2 is provided with positioning slots on both sides of the square through hole 4, which facilitates the placement and positioning of the insert 5 during injection molding.

[0036] When using it, step 1: After the open-chest surgery is completed, align the split sternum;

[0037] Step 2: Clamp the puncture needle 3 of the sternal ligation with surgical forceps, puncture the soft tissue under the sternum, and move the toothed band 1 to the other side of the sternum.

[0038] Step 3: Cut the connection between the puncture needle 3 and the sternal ligation band, and discard the puncture hook;

[0039] Step 4: Pass the end of the toothed band 1 that wraps around the sternum through the square through hole 4 of the buckle 2, and pull it until the buckle 2 contacts the sternum.

[0040] Step 5: Place the toothed belt 1 into the slot 16 on the side of the tightening device, the push rod 8 contacts the buckle 2, rotate the locking knob 12 to press down and lock the long toothed belt 1.

[0041] Step 6: Rotate the adjustment knob 14 of the tightening device, refer to the first scale line 17 of the slider 11 corresponding to the second scale line 18 on the handle 7, and adjust the tension of the sternal bandage to a suitable tension value.

[0042] Step 7: Use surgical scissors to cut off the long toothed strip 1 that is exposed outside the lock 2, and discard the cut-off long toothed strip 1.

[0043] When using the tightening device, the toothed belt 1 is placed into the slot 16 on the side of the tightening device. The toothed belt 1 is tightened by rotating the adjustment knob 14 through the screw thread and the threaded hole. Rotating the adjustment knob 14 drives the slider 11 to move. When the slider 11 moves, the tension value can be displayed by the first scale line 17 on the slider 11 corresponding to the second scale line 18 on the handle 7. Then, the toothed belt 1 is loosened by rotating the adjustment knob 14 through the screw thread and the threaded hole, and the toothed belt 1 is removed.

[0044] The beneficial effects of the above-mentioned structure of this utility model are as follows: The flexible self-locking sternal band and its tightening device provided by this utility model tighten the toothed band by inserting the toothed band into the buckle. The tip of the insert rests on the protrusion of the long toothed band, which can prevent the toothed band from loosening and achieve self-locking. It is simple to operate, has good mechanical strength, is not easy to be damaged, and is sturdy and durable. Moreover, the buckle and toothed band are made of polyetheretherketone material, which has good biocompatibility and prevents the generation of metal particles and bone dissolution when the metal band is rubbed. The insert is made of metal material, which has high mechanical strength and is not easy to be damaged. It is more sturdy and durable than the polyetheretherketone elastic toothed band, and can be visualized under X-ray in vivo.

[0045] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A flexible self-locking sternal band and its tightening device, comprising a toothed band and a tightening mechanism, characterized in that, The toothed belt has a buckle at one end and a piercing needle at the other end. The buckle has a square through hole, and an insert is provided on the side of the square through hole near the toothed belt. The insert has a pointed end. The outer wall of the toothed belt on the side opposite the insert at the buckle has multiple protrusions that cooperate with the insert. The pointed end of the insert rests against the protrusion. The tightening mechanism includes a handle, a push rod at one end of the handle, and a handle cover plate at the other end of the handle. The handle has a cavity inside, with grooves at the upper and lower ends. A slider that can slide in the cavity is provided. The upper end of the slider has a locking knob threaded through the groove. A U-shaped groove is provided on the side near the handle cover plate. An adjustment knob is threaded on the handle cover plate. A circular stop is provided at the end of the adjustment knob inside the cavity. The circular stop is located in the U-shaped groove. The push rod, handle, and slider all have slots on the same side. The three slots are connected and on the same horizontal plane. When the toothed belt is tightened, it is placed in the slot.

2. The flexible self-locking sternal bandage and its tightening device as described in claim 1, characterized in that: Each of the four inner walls of the four-sided through hole is provided with at least one insert piece, and the outer wall around the end of the toothed belt near the buckle is provided with multiple protrusions that cooperate with the insert pieces.

3. The flexible self-locking sternal bandage and its tightening device as described in claim 2, characterized in that: Two or more inserts are longitudinally arranged on the inner wall of the same side of the four-sided through hole.

4. The flexible self-locking sternal bandage and its tightening device as described in claim 1, characterized in that: The protrusions are either dot-shaped or serrated.

5. The flexible self-locking sternal bandage and its tightening device as described in claim 1, characterized in that: The upper end of the slider is provided with a first scale line between the locking knob and the U-shaped groove, and the handle is provided with a second scale line on one side of the groove.

6. The flexible self-locking sternal bandage and its tightening device as described in claim 1, characterized in that: The connection between the puncture needle and the toothed belt is provided with an anti-rotation and anti-dislodgement mechanism. The anti-rotation and anti-dislodgement mechanism includes an I-shaped locking block at one end of the puncture needle and a locking groove at the other end of the toothed belt that cooperates with the I-shaped locking block. The locking block is located in the locking groove.

7. The flexible self-locking sternal bandage and its tightening device as described in claim 1, characterized in that: The puncture needle is arc-shaped and is made of medical stainless steel or titanium alloy.

8. The flexible self-locking sternal bandage and its tightening device as described in claim 7, characterized in that: The insert is made of medical implant-grade metal material, titanium and titanium alloy, cobalt-chromium alloy, or nickel-titanium alloy.

9. The flexible self-locking sternal bandage and its tightening device as described in claim 8, characterized in that: The buckle and toothed belt are made of polyetheretherketone (PEEK) material, and the insert, puncture needle, buckle and toothed belt are integrally injection molded.

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