Tendon pretensioning device

Abstract

The utility model relates to tendon pre-tensioning instrument field, specifically is a kind of tendon pre-tensioning instrument, including metal plate and upper pulley, the upper pulley is arranged in the upper side of metal plate one side, the upper pulley is used to change the direction of force, the lower side of upper pulley is provided with spring assembly, spring assembly is used to convert force into spring compression amount for measurement, the lower side of metal plate one side is provided with curling assembly, curling assembly is used to curl metal wire, the function double-beam kit of the utility model is through ingenious metal wire reverse folding structure, utilizes movable pulley principle to make tendon force reduction half, not only reduce the operation difficulty, also revolutionize pre-tensioning mode.It kit support, square cylinder and fixed part one work together, ensure that structure is stable and operation safety.Anatomy single-beam and anatomy double-beam kit are aimed at the characteristics of isolated tendon, provide reliable attachment point for tendon wire fixation and tensioning through notch, recess, fixed part two and perforation etc. design, meet the special needs of tendon processing under different operation.

Description

Technical Field

[0001] This utility model relates to the field of tendon pretensioning device technology, and in particular to a tendon pretensioning device. Background Technology

[0002] In the field of knee ligament reconstruction surgery, the workstation is a key auxiliary device, and its performance plays a crucial role in the surgical outcome.

[0003] Currently, traditional workstations are primarily designed and applied for anatomical single-bundle and anatomical double-bundle procedures. However, with the continuous development and innovation of medical technology, new functional double-bundle procedures have emerged, gradually highlighting the limitations of traditional workstations in terms of surgical compatibility. They cannot simultaneously meet the needs of functional double-bundle procedures, resulting in clinicians lacking effective equipment support when facing such surgeries. This significantly limits the selection and implementation of surgical plans, hindering the widespread clinical application and promotion of new procedures.

[0004] From a tensile performance perspective, the upper limit of pretension in traditional workstations is only 90N. However, numerous cutting-edge medical studies have shown that 80N is only the routinely used pretension value in tendon pretensioning procedures for anatomical single-bundle surgeries, while a pretension of 160N can bring more ideal results for tendon repair and reconstruction. This gap makes traditional workstations inadequate in pursuing better treatment outcomes and unable to meet the urgent need for higher pretension in clinical practice.

[0005] Therefore, this utility model provides a tendon pretensioning device. Utility Model Content

[0006] The purpose of this invention is to provide a tendon pretensioning device, which solves the above-mentioned problems when used in operation.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a tendon pretensioning device, comprising a metal plate and an upper pulley, wherein the upper pulley is provided above one side of the metal plate and the upper pulley is used to change the direction of the force;

[0008] A spring assembly is installed below the upper pulley. The spring assembly is used to convert force into spring compression for measurement.

[0009] A coiling assembly is provided on the lower side of one side of the metal plate; the coiling assembly is used to coil the metal wire.

[0010] The metal plate has a functional double-bundle kit and an anatomical single-bundle kit and an anatomical double-bundle kit respectively installed on the upper and lower sides of one side. The functional double-bundle kit provides attachment points for the retraction of the metal wire, while the anatomical single-bundle kit and the anatomical double-bundle kit are used to provide attachment points for the tensioning of isolated tendons.

[0011] Preferably, the spring assembly includes a reset post disposed below the upper pulley, with fixed seats at the upper and lower ends of the reset post, the fixed seats being fixed to a metal plate, a stop block disposed below the upper fixed seat, the stop block being fixed to the outside of the reset post, and a compression spring disposed below the stop block, the compression spring being wound around the outside of the reset post.

[0012] Preferably, the curling assembly includes a lower pulley disposed below one side of the metal plate, a fixed turntable fixed on a shaft at one end of the lower pulley, the fixed turntable and the lower pulley being coaxially linked, a scale plate disposed on the inner side of the fixed turntable, the scale plate being fixed on the metal plate, a plurality of small holes being opened directly below the fixed turntable, and a circular hole being opened on the scale plate corresponding to the small holes opened directly below the fixed turntable, and a metal rod being disposed in the aforementioned small holes and circular holes.

[0013] Preferably, the functional dual-beam kit includes a kit support leg disposed above one side of the metal plate, the kit support leg being located below the upper pulley, a transverse cylinder being provided at the end of the kit support leg, a groove being provided between the transverse cylinder and the kit support leg, and a fixing member being provided at the lower end of the kit support leg.

[0014] Preferably, the anatomical single-beam and anatomical double-beam kit includes a lower cube disposed below one side of the metal plate, the lower cube having a perforation inside, an upper cube fixed to the end of the lower cube, a notch at the rear end of the upper cube, a groove on the outer side of the top of the lower cube, and a fixing member two fixed to the front end of the lower cube.

[0015] Preferably, the bottom of the metal plate is threaded with a metal handle, and the bottom of the metal handle is connected to an extension handle.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model provides a tendon pretensioning device. The functional double-bundle kit, through a clever metal wire reversal structure, utilizes the principle of a movable pulley to halve the force on the tendon, not only reducing the difficulty of operation but also innovating the pretensioning method. Its kit legs, square and round cylinders, and fixation element work together to ensure structural stability and operational safety. The anatomical single-bundle and anatomical double-bundle kits, specifically designed for isolated tendons, provide reliable attachment points for tendon suture fixation and tensioning through notches, grooves, fixation element two, and perforations, meeting the specific needs of tendon treatment under different surgical procedures.

[0018] 2. This utility model provides a tendon pretensioning device. The upper pulley flexibly adapts to changes in the tendon stretching direction during surgery, changing the direction of the applied force in real time to ensure that the applied force always matches the tendon's movement trajectory, greatly improving the precision and comfort of the surgical procedure. The compression spring, based on the direct proportionality between force and compression, accurately converts force into measurable compression, providing doctors with intuitive and reliable force data, assisting in precise force control during surgery.

[0019] 3. This utility model provides a tendon pretensioning device with a coaxial linkage mechanism between the fixed turntable and the sliding wheel. Combined with a unique dial design, it can convert the length of the coiled metal wire into a precise force scale display. The dial has two sets of scales with different precision to meet diverse measurement needs. Furthermore, by using a metal rod passing through corresponding holes in the dial and the fixed turntable, the tension can be precisely fixed, ensuring force stability during tendon pretensioning and weaving, and reducing operational errors.

[0020] 4. This utility model provides a tendon pretensioning instrument that, whether used in functional double-bundle surgery where only one end of the tendon needs to be connected, or in anatomical single-bundle and double-bundle surgery where both ends of the tendon need to be fixed, achieves precise pretensioning of the tendon through a simple and smooth operating procedure: rotating the fixed turntable drives the relevant components to work together. The unique pretensioning method in functional double-bundle surgery, without relying on a high-precision dial, flexibly changes the tendon force through a simple structural design, greatly improving surgical efficiency and providing surgeons with a convenient and efficient surgical tool. Attached Figure Description

[0021] Figure 1 This is the side view structure of this utility model. Figure 1 ;

[0022] Figure 2 This is the front view structure in this utility model. Figure 1 ;

[0023] Figure 3 This is the side view structure of this utility model. Figure 2 ;

[0024] Figure 4 This is the front view structure in this utility model. Figure 2 ;

[0025] Figure 5 This is a front view of the functional dual-beam kit in this utility model;

[0026] Figure 6 This is a side view of the functional dual-beam kit in this utility model;

[0027] Figure 7 This is a top view of the functional dual-beam kit in this utility model;

[0028] Figure 8 This is a front view structural diagram of the anatomical single-beam and anatomical double-beam kits of this utility model;

[0029] Figure 9 This is a side view of the anatomical single-beam and anatomical double-beam kits of this utility model;

[0030] Figure 10This is a top view of the anatomical single-beam and anatomical double-beam kits of this utility model;

[0031] Figure 11 This is a structural diagram of the extension handle in this utility model.

[0032] The following are the annotations in the diagram: 1. Metal plate; 11. Metal handle; 12. Extension handle; 2. Upper pulley; 3. Kit support leg; 31. Horizontal cylinder; 32. Groove; 33. Fixing component one; 4. Reset post; 41. Fixing base; 42. Compression spring; 43. Stop block; 5. Dial; 51. Fixed turntable; 52. Metal rod; 53. Lower pulley; 6. Lower cube; 61. Upper cube; 62. Notch; 63. Groove; 64. Perforation; 65. Fixing component two. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0035] Combination Figures 1 to 11 As shown, a tendon pretensioning device of the present invention includes a metal plate 1 and an upper pulley 2. The upper pulley 2 is provided above one side of the metal plate 1 and is used to change the direction of force.

[0036] A spring assembly is provided below the upper pulley 2. The spring assembly is used to convert force into spring compression for measurement.

[0037] A coiling assembly is provided on the lower side of one side of the metal plate 1. The coiling assembly is used to coil the metal wire.

[0038] The metal plate 1 has a functional double-bundle kit and an anatomical single-bundle kit and an anatomical double-bundle kit respectively installed on the upper and lower sides of one side. The functional double-bundle kit provides attachment points for the retraction of the metal wire, and the anatomical single-bundle kit and the anatomical double-bundle kit are used to provide attachment points for the tensioning of isolated tendons.

[0039] The spring assembly includes a reset post 4 located below the upper pulley 2. The upper and lower ends of the reset post 4 are fitted with fixing seats 41, which are fixed to the metal plate 1. A stop block 43 is located below the upper fixing seat 41 and is fixed to the outside of the reset post 4. A compression spring 42 is located below the stop block 43 and is wound around the outside of the reset post 4. The compression spring 42 is self-fixed between the lower fixing seat 41 and the stop block 43 with a certain initial compression force.

[0040] The curling assembly includes a lower roller 53 disposed below one side of the metal plate 1. A fixed turntable 51 is fixed on the shaft at one end of the lower roller 53. The fixed turntable 51 is coaxially linked with the lower roller 53. A scale 5 is disposed on the inner side of the fixed turntable 51. The scale 5 is fixed on the metal plate 1. Multiple small holes are opened directly below the fixed turntable 51. A circular hole is opened on the scale 5 corresponding to the small holes opened directly below the fixed turntable 51. A metal rod 52 is disposed in the small holes and the circular holes.

[0041] The functional dual-beam kit includes a kit support leg 3 located above one side of the metal plate 1. The kit support leg 3 is located below the upper pulley 2. A transverse cylinder 31 is provided at the end of the kit support leg 3. A groove 32 is provided between the transverse cylinder 31 and the kit support leg 3. A fixing member 33 is provided at the lower end of the kit support leg 3.

[0042] The folded metal wire is fixed to the horizontal cylinder 31. There is a hollow gap between the horizontal cylinder 31 and the kit support 3 to provide space for fixing the metal wire.

[0043] The anatomical single-beam and anatomical double-beam kit includes a lower cube 6 located below one side of the metal plate 1. The lower cube 6 has a perforation 64 inside. An upper cube 61 is fixed to the end of the lower cube 6. A notch 62 is provided at the rear end of the upper cube 61. A groove 63 is provided on the outer side of the top of the lower cube 6. A fixing member 2 65 is fixed to the front end of the lower cube 6.

[0044] A metal handle 11 is threadedly connected to the bottom of the metal plate 1, and an extension handle 12 is connected to the bottom of the metal handle 11. The metal handle 11 is designed to be relatively short because the instrument needs to be repeatedly sterilized after each use. For ease of sterilization, it is designed in two parts: the metal handle 11 and the extension handle 12. The metal handle 11 and the extension handle 12 are threadedly connected, and both are hollow steel tubes. The length of the extension handle 12 is set to 45cm, and the extension handle 12 is fixed to the operating table.

[0045] Specifically, such as Figures 1 to 4 As shown:

[0046] The upper pulley 2 is used to change the direction of the force, so that the applied force can change with the direction of tendon stretching during the operation.

[0047] Compression spring 42: 10cm in length. Within a certain range, the compression amount of compression spring 42 is directly proportional to its elastic force. The force is converted into the compression amount of compression spring 42 for measurement. Its actual function is measurement.

[0048] The fixed turntable 51 and the lower pulley 53 are coaxially linked, quantifying and displaying the length of a certain coiled metal wire through the fixed turntable 51 and the scale 5. At the same time, the scale of the scale 5 occupies only 1 / 3 of the angle, and a circular hole is set in the opposite 1 / 3 to fix the lower pulley 53, thereby fixing the applied force.

[0049] Dial 5: It is stationary and will not rotate. The top third of the dial is engraved with graduations. There are two sets of graduations: one set with each graduation measuring 20N, up to a maximum of 200N; the other set with each graduation measuring 10N, up to a maximum of 100N. The total length of the graduations is the same. This is related to pulley technology; by changing the connection method of the metal wires, the force applied to the tendon is multiplied. The bottom third has multiple small holes, corresponding to each graduation.

[0050] Lower pulley 53: The applied force is quantified by the length of the coiled metal wire. It is coaxially connected to the outer dial 5 and the fixed turntable 51.

[0051] Metal rod 52: When the desired force is applied, the metal rod 52 passes through the hole below the turntable 51 and the corresponding hole in the scale 5 at the same time, so as to fix the tension.

[0052] like Figures 5 to 7 As shown, this is a functional double-bundle kit: kit support 3 is used to fix the kit's feet and is used to insert the metal plate 1; the square-round cylinder 32 provides space; the fixing member 33 is a protruding structure that prevents the kit from falling off downwards when the metal wire is pulled down, and plays a fixing role when the kit is subjected to downward force. The functional double-bundle kit provides an attachment point for the reverse fold of the metal wire. The reverse fold acts as a movable pulley, halving the stress on the tendon under a certain downward force.

[0053] like Figures 8 to 10 As shown, this is an anatomical single-bundle and anatomical double-bundle kit: Notch 62 is used for securing the suture. After the suture on the tendon is pressed against the upper platform, it folds downward through this notch; after the suture comes down from notch 62, it passes around groove 63, the suture winds and shapes within groove 63, and then is knotted for fixation; Fixing element 65 is a fixing structure, with the foot below the lower cube 6 inserted into the metal plate 1, this structure is used for fixation when the assembly is under force; Perforation 64 is a hole penetrating the front and back of the lower cube 6, used to pass through the metal wire, the metal wire supporting the spring assembly and the lower pulley 53. This structure is used to provide attachment points for tensioning isolated tendons in the anatomical single-bundle and anatomical double-bundle kits.

[0054] Working principle:

[0055] likeFigure 1 and Figure 2 As shown, only one end of the required tendon needs to be separated, while the other end is connected to the patient's body. Therefore, the workstation is only connected to one end. The figure shows a functional double-bundle kit, which is located between the upper pulley 2 and the spring assembly. The kit connects the wire to the separated end of the tendon, passes the wire around the upper pulley 2, and passes the wire through the top of the reset post 4 and fixes it to the functional double-bundle kit. The functional double-bundle kit provides an attachment point for the wire to bend back, and the bend acts as a movable pulley, reducing the force on the tendon by half under a certain force applied from below.

[0056] Rotating the handle to fix the turntable 51 causes the coaxial pulley 53 to rotate, which in turn drives the metal wire to pull the reset column 4 downward. The reset column 4 compresses the spring 42 and pulls the metal wire at the top. The direction of the force is changed through the upper pulley 2 and finally applied to the tendon.

[0057] When the appropriate force is applied, the metal rod 52 passes through the scale 5 and the fixed turntable 51 simultaneously and is then fixed, thereby enabling tendon pretensioning and tendon weaving.

[0058] The functional double-bundle is not just a change in pretensioning method: the workstation needs to be erected for operation. The important point is that the pretensioning force required for the functional double-bundle is half that of the anatomical single-bundle and anatomical double-bundle, through a simple structural design: the upper metal wire is fixed by reverse bending.

[0059] The functional double-bundle kit provides a gripper for the folded wire. Based on pulley theory, when applied in a functional double-bundle kit, folding the wire back halves the manually applied tension at the tendon end.

[0060] like Figure 3 and Figure 4 As shown, the workstation is placed flat on a sterile table. The required tendon needs to be removed from the patient's body and pre-stretched and braided on the sterile table. Therefore, both ends of the tendon need to be fixed on the workstation. The figure shows an anatomical single-bundle and anatomical double-bundle kit, which is located between the lower pulley 53 and the spring assembly. The two ends of the separated tendon are connected to the metal wire, so that the metal wire at one end passes around the upper pulley 2 and connects to the top of the reduction post 4. Then, the metal wire at the other end of the separated tendon is fixed to the anatomical single-bundle and anatomical double-bundle kit.

[0061] Rotating the handle to fix the turntable 51 causes the coaxial pulley 53 to rotate, which in turn drives the metal wire to pull the reset column 4 downward. The reset column 4 compresses the spring 42 and pulls the metal wire at the top. The direction of the force is changed through the upper pulley 2 and finally applied to the tendon.

[0062] In a functional double-bundle tendon, there is only one free end, whereas in anatomical single-bundle and double-bundle tendons, the tendon is completely removed from the patient, so the tendon has two ends. Both ends need to be fixed; one end is stretched by the upper metal wire, and the other end needs to be fixed to this kit for tendon stretching.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tendon pretensioning device, comprising a metal plate (1) and an upper pulley (2), characterized in that: An upper pulley (2) is provided on the upper side of one side of the metal plate (1), and the upper pulley (2) is used to change the direction of the force; A spring assembly is provided below the upper pulley (2), which is used to convert force into spring compression for measurement; A coiling assembly is provided on the lower side of one side of the metal plate (1), the coiling assembly being used to coil the metal wire; The metal plate (1) is provided with a functional double-bundle kit and an anatomical single-bundle and an anatomical double-bundle kit on the upper and lower sides of one side, respectively. The functional double-bundle kit provides attachment points for the reversal of the metal wire, and the anatomical single-bundle and anatomical double-bundle kits are used to provide attachment points for the tensioning of isolated tendons.

2. The tendon pretensioning device according to claim 1, characterized in that: The spring assembly includes a reset post (4) located below the upper pulley (2). The upper and lower ends of the reset post (4) are provided with fixing seats (41), which are fixed to the metal plate (1). A stop block (43) is provided below the upper fixing seat (41), which is fixed to the outside of the reset post (4). A compression spring (42) is provided below the stop block (43), which is wound around the outside of the reset post (4).

3. The tendon pretensioning device according to claim 2, characterized in that: The curling assembly includes a pulley (53) located below one side of the metal plate (1). A fixed turntable (51) is fixed on a shaft at one end of the pulley (53). The fixed turntable (51) is coaxially linked with the pulley (53). A scale (5) is provided on the inner side of the fixed turntable (51). The scale (5) is fixed on the metal plate (1). Multiple small holes are provided directly below the fixed turntable (51). A circular hole is provided on the scale (5) corresponding to the small holes provided directly below the fixed turntable (51). A metal rod (52) is provided in the small holes and the circular hole.

4. The tendon pretensioning device according to claim 3, characterized in that: The functional dual-beam kit includes a kit support leg (3) located above one side of the metal plate (1). The kit support leg (3) is located below the upper pulley (2). A transverse cylinder (31) is provided at the end of the kit support leg (3). A groove (32) is provided between the transverse cylinder (31) and the kit support leg (3). A fixing member (33) is provided at the lower end of the kit support leg (3).

5. A tendon pretensioning device according to claim 4, characterized in that: The anatomical single-bundle and anatomical double-bundle kit includes a lower cube (6) located below one side of the metal plate (1), with a perforation (64) inside the lower cube (6), an upper cube (61) fixed to the end of the lower cube (6), a notch (62) at the rear end of the upper cube (61), a groove (63) on the outer side of the top of the lower cube (6), and a fixing member two (65) fixed to the front end of the lower cube (6).

6. A tendon pretensioning device according to claim 5, characterized in that: The bottom of the metal plate (1) is threaded with a metal handle (11), and the bottom of the metal handle (11) is connected with an extension handle (12).

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