Tendon pre-tensioning instrument

Abstract

The invention belongs to the field of tendon pre-tensioning instruments, and particularly relates to a tendon pre-tensioning instrument which comprises a metal plate and an upper pulley, the upper pulley is arranged above one side of the metal plate and used for changing the direction of force, and a spring assembly is arranged below the upper pulley and used for converting force into spring compression amount for measurement. According to the functional double-bundle suite, through an ingenious metal wire reverse folding structure, tendon stress is reduced by half by means of the movable pulley principle, the operation difficulty is lowered, and the pre-tensioning mode is innovated. The suite supporting feet, the square cylinder and the first fixing piece work cooperatively, and structural stability and operation safety are guaranteed. The dissecting single-bundle and dissecting double-bundle suite provides a reliable attachment point for fixing and tensioning a tendon line belt through the design of a notch, a groove, a fixing part II, a through hole and the like according to the characteristics of the in-vitro tendon, and meets the special requirements of different operation modes on tendon treatment.

Description

Technical Field

[0001] The invention belongs to the field of tendon pretensioning devices, in particular to a tendon pretensioning device. Background Art

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

[0003] At present, traditional workstations are mainly designed and applied around anatomical single-beam and anatomical double-beam procedures. However, with the continuous development and innovation of medical technology, new functional double-beam procedures have emerged, and the limitations of traditional workstations in procedure compatibility have gradually become apparent. It cannot take into account the requirements of functional double-beam procedures, resulting in a lack of effective equipment support for clinicians in the face of such operations, which greatly limits the selection and implementation of surgical plans and hinders the widespread application and promotion of new procedures in clinical practice.

[0004] From the perspective of tensile performance, the upper limit of the pre-tension of traditional workstations is only 90N. However, a large number of cutting-edge medical studies have shown that in the tendon pre-tensioning operation of the anatomical single-bundle procedure, 80N is only the conventional pre-tension value, and 160N pre-tension can bring more ideal results for tendon repair and reconstruction. This gap makes it difficult for traditional workstations to achieve better treatment results and meet the urgent demand for higher pre-tension in clinical practice.

[0005] To this end, the present invention provides a tendon pretensioning device. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a tendon pretensioning device described in the present invention comprises a metal plate and an upper pulley, wherein the upper pulley is arranged 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 provided below the upper pulley, and the spring assembly is used to convert the force into spring compression for measurement;

[0009] A curling assembly is arranged below one side of the metal plate, and the curling assembly is used to curl the metal wire;

[0010] A functional double-bundle kit and an anatomical single-bundle and anatomical double-bundle kits are respectively arranged above and below one side of the metal plate. The functional double-bundle kit provides an attachment point for the folding of the metal wire, and the anatomical single-bundle and anatomical double-bundle kits are used to provide attachment points for tensioning the isolated tendon.

[0011] Preferably, the spring assembly includes a reset column arranged below the upper pulley, a fixed seat is arranged at the upper and lower ends of the outside of the reset column, the fixed seat is fixed on the metal plate, a stopper is arranged below the upper end fixed seat, the stopper is fixed to the outside of the reset column, a compression spring is arranged below the stopper, and the compression spring is wound around the outside of the reset column.

[0012] Preferably, the curling assembly includes a lower pulley arranged below one side of the metal plate, a fixed turntable is fixed on the shaft at one end of the lower pulley, the fixed turntable is coaxially linked with the lower pulley, a scale dial is arranged on the inner side of the fixed turntable, the scale dial is fixed on the metal plate, a plurality of small holes are opened directly below the fixed turntable, the scale dial is opened with circular holes corresponding to the small holes opened directly below the fixed turntable, and metal rods are arranged in the above-mentioned small holes and the circular holes.

[0013] Preferably, the functional double-beam kit includes a kit support foot arranged above one side of the metal plate, the kit support foot is located below the upper pulley, a transverse cylinder is arranged at the end of the kit support foot, a groove body is arranged between the transverse cylinder and the kit support foot, and a fixing part is arranged at the lower end of the kit support foot.

[0014] Preferably, the anatomical single-bundle and anatomical double-bundle kits include a lower cube arranged below one side of a metal plate, the interior of the lower cube is provided with a through hole, an upper cube is fixed to the end of the lower cube, a notch is provided at the rear end of the upper cube, a groove is provided on the outer side of the top of the lower cube, and a fixing part 2 is fixed to the front end of the lower cube.

[0015] Preferably, the bottom of the metal plate is threadedly connected to a metal handle, and the bottom of the metal handle is connected to an extended handle.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The tendon pretensioning device described in the present invention is a functional double-bundle kit that uses a clever metal wire folding structure and the movable pulley principle to reduce the force on the tendon by half, which not only reduces the difficulty of operation, but also innovates the pretensioning method. The kit's support feet, square and round columns, and fixings work together to ensure structural stability and operational safety. The anatomical single-bundle and anatomical double-bundle kits are designed with notches, grooves, fixings 2, and perforations to provide reliable attachment points for tendon line fixation and tensioning, meeting the special needs of tendon treatment under different surgical procedures.

[0018] 2. The tendon pretensioning device described in the present invention has an upper pulley that can flexibly adapt to the changes in the tendon stretching direction of the patient during surgery, change the direction of the loading force in real time, and ensure that the application of force always fits the movement trajectory of the tendon, greatly improving the accuracy and comfort of the surgical operation. The compression spring accurately converts force into measurable compression based on the proportional relationship between force and compression, providing doctors with intuitive and reliable force data, and helping to accurately control the force during surgery.

[0019] 3. The tendon pretensioning device described in the present invention has a coaxial linkage mechanism between the fixed turntable and the lower pulley, and a unique dial design, which can convert the length of the curled metal wire into an accurate force scale display. The dial has two sets of scales with different precisions to meet diverse measurement needs, and the metal rod passes through the corresponding holes of the dial and the fixed turntable to accurately fix the tension, ensure the stability of the force during tendon pretensioning and braiding, and reduce operational errors.

[0020] 4. The tendon pretensioning device described in the present invention, whether it is a functional double-bundle procedure that only needs to connect one end of the tendon, or an anatomical single-bundle and double-bundle procedure that needs to fix both ends of the tendon, the device uses a simple and smooth operation process, that is, rotating the fixed turntable to drive the relevant components to work together to achieve accurate pretensioning of the tendon. The unique pretensioning method in the functional double-bundle procedure, without relying on a high-precision dial, flexibly changes the tendon force through a simple structural design, greatly improves the efficiency of surgical operations, and provides doctors with a convenient and efficient surgical tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is the side view structure in the present invention Figure 1 ;

[0023] Figure 2 It is the front view structure in the present invention Figure 1 ;

[0024] Figure 3 It is the side view structure in the present invention Figure 2 ;

[0025] Figure 4 It is the front view structure in the present invention Figure 2 ;

[0026] Figure 5 This is a front view structural diagram of the functional double-beam kit in the present invention;

[0027] Figure 6 It is a side view structural diagram of the functional double-beam kit in the present invention;

[0028] Figure 7 It is a top view structural diagram of the functional dual-beam kit in the present invention;

[0029] Figure 8 It is a front view structural diagram of the anatomical single-bundle and anatomical double-bundle kits of the present invention;

[0030] Fig. 9 It is a side view of the structure of the anatomical single-bundle and anatomical double-bundle kits of the present invention;

[0031] Fig.10 It is a top view of the structure of the anatomical single-bundle and anatomical double-bundle kits of the present invention;

[0032] Fig.11 It is a structural diagram of the extended handle in the present invention.

[0033] In the figure: 1. metal plate; 11. metal handle; 12. extension handle; 2. upper pulley; 3. kit support foot; 31. horizontal cylinder; 32. trough body; 33. fixing part 1; 4. reset column; 41. fixing seat; 42. compression spring; 43. stopper; 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 part 2. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] like Figures 1 to 11 As shown, a tendon pretensioning device according to an embodiment of the present invention comprises a metal plate 1 and an upper pulley 2. The upper pulley 2 is arranged above one side of the metal plate 1, and the upper pulley 2 is used to change the direction of the force;

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

[0037] A curling assembly is provided below one side of the metal plate 1, and the curling assembly is used to curl the metal wire;

[0038] A functional double-bundle kit and an anatomical single-bundle and anatomical double-bundle kits are respectively arranged above and below one side of the metal plate 1. The functional double-bundle kit provides an attachment point for the folding of the metal wire, and the anatomical single-bundle and anatomical double-bundle kits are used to provide attachment points for tensioning the isolated tendon.

[0039] The spring assembly includes a reset column 4 disposed below the upper pulley 2, a fixing seat 41 is disposed at the upper and lower ends of the reset column 4, the fixing seat 41 is fixed on the metal plate 1, a stopper 43 is disposed below the upper end fixing seat 41, the stopper 43 is fixed to the outside of the reset column 4, a compression spring 42 is disposed below the stopper 43, and the compression spring 42 is wound around the outside of the reset column 4. The compression spring 42 is fixed between the lower fixing seat 41 and the stopper 43 by itself with a certain initial compression force.

[0040] The curling assembly includes a lower pulley 53 arranged below one side of the metal plate 1, a fixed turntable 51 is fixed on the shaft at one end of the lower pulley 53, the fixed turntable 51 is coaxially linked with the lower pulley 53, a scale plate 5 is arranged on the inner side of the fixed turntable 51, the scale plate 5 is fixed on the metal plate 1, a plurality of small holes are opened directly below the fixed turntable 51, and circular holes corresponding to the small holes opened directly below the fixed turntable 51 are opened on the scale plate 5, and metal rods 52 are arranged in the above-mentioned small holes and the circular holes.

[0041] The functional double-beam kit includes a kit foot 3 arranged above one side of the metal plate 1, the kit foot 3 is located below the upper pulley 2, a transverse cylinder 31 is arranged at the end of the kit foot 3, a groove body 32 is arranged between the transverse cylinder 31 and the kit foot 3, and a fixing part 33 is arranged at the lower end of the kit foot 3.

[0042] The folded metal wire is fixed on the transverse cylinder 31 , and there is a hollow space between the transverse cylinder 31 and the support leg 3 of the kit to provide space for fixing the metal wire.

[0043] The anatomical single-bundle and anatomical double-bundle kits include a lower cube 6 arranged below one side of the metal plate 1, a through hole 64 is provided inside the lower cube 6, 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, and a fixing part 2 65 is fixed to the front end of the lower cube 6.

[0044] The bottom of the metal plate 1 is threadedly connected with a metal handle 11, and the bottom of the metal handle 11 is connected with an extension handle 12. The metal handle 11 is designed to be short, because the instrument needs to be repeatedly sterilized after each use. In order to facilitate sterilization, it is designed to be divided into two sections, one section is the metal handle 11, and the other section is the extension handle 12. The metal handle 11 and the extension handle 12 are threadedly connected, and both are hollow steel pipes. The length of the extension handle 12 is set to 45 cm, and the extension handle 12 is fixed to the operating table.

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

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

[0047] Compression spring 42: Length is 10 cm. The compression amount of compression spring 42 is proportional to the elastic force within a certain range. The force is converted into the compression amount of compression spring 42 for measurement. It is actually a measurement function.

[0048] The fixed turntable 51 is coaxially linked with the lower pulley 53, and the length of a certain curled wire is quantitatively displayed through the fixed turntable 51 and the scale 5. At the same time, the scale of the scale 5 only occupies 1 / 3 of the angle, and a round hole is set on the opposite 1 / 3 to fix the lower pulley 53, and then fix the applied force.

[0049] Dial 5: It is stationary and does not rotate. The upper 1 / 3 is engraved with scales. There are two sets of scales. One set has 20N scales per scale, and the maximum scale is 200N. The other set has 10N scales per scale, and the maximum scale is 100N. The total length of the scales is the same. It is related to the knowledge of pulleys. By changing the connection method of the metal wire, the force on the tendon is doubled. There are multiple small holes in the lower 1 / 3, corresponding to each scale.

[0050] The lower pulley 53 is used to quantify the applied force by the length of the curled wire. The outer scale plate 5 and the fixed turntable 51 are connected by a coaxial transmission.

[0051] Metal rod 52: When the desired force is applied, the metal rod 52 is passed through the hole below the turntable 51 and the corresponding hole in the dial 5 at the same time to play a role in fixing the pulling force.

[0052] like Figures 5 to 7 As shown, it is a functional double-beam kit: the kit foot 3 is used to fix the foot of the kit, which is used to insert the metal plate 1; the square column 32 provides space; the fixing piece 33 is a protruding structure. When the metal wire is pulled downward, this vertical structure can prevent the kit from falling out downward, and plays a fixing role when the kit is subjected to downward force. The functional double-beam kit provides an attachment point for the fold of the metal wire. The fold acts as a movable pulley, which reduces the force on the tendon by half under the condition that a certain force is applied from below.

[0053] like Figures 8 to 10 As shown, it is an anatomical single-bundle and anatomical double-bundle kit: the notch 62 is used to fix the wire. After the wire on the tendon is close to the upper platform, it is folded downward through this notch; after the wire of the tendon comes down from the notch 62, it bypasses the groove 63, and the wire is wound and shaped in the groove 63, and then tied and fixed; the second fixing member 65 is a fixing structure, and the foot under the lower cube 6 is inserted into the metal plate 1. When the component is stressed, this structure is used for fixing; the perforation 64 is a hole that runs through the front and back of the lower cube 6, which is used to pass the metal wire, and the metal wire receives the spring assembly and the lower pulley 53. The anatomical single-bundle and anatomical double-bundle kit, this structure is used to provide an attachment point for the tensioning of the isolated tendon.

[0054] Working principle:

[0055] like Figure 1 and Figure 2As shown, only one end of the required tendon needs to be separated, and the other end is connected to the patient's body, so the workstation is only connected to one end. A functional double-bundle kit is installed in the figure. The functional double-bundle kit is located between the upper pulley 2 and the spring assembly. The metal wire is connected to the separated end of the tendon, and the metal wire is passed through the upper pulley 2, and the metal wire is passed through the top of the reset column 4 and fixed on the functional double-bundle kit. The functional double-bundle kit provides an attachment point for the fold of the metal wire, and the fold plays the role of a movable pulley, which reduces the force on the tendon by half under the condition that a certain force is applied from below;

[0056] By rotating the fixed turntable 51 through the handle, the coaxial lower pulley 53 rotates, driving the metal wire to pull the reset column 4 downward, and the reset column 4 squeezes the compression spring 42 to contract, while pulling the top metal wire, changing the direction of the force through the upper pulley 2, and finally applying it to the tendon.

[0057] When the corresponding force is applied, the metal rod 52 is passed through the scale plate 5 and the fixed turntable 51 at the same time and then fixed, thereby pre-tensioning and braiding the tendon.

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

[0059] The functional double-beam kit provides a grip for the reflexed wire. According to pulley knowledge, when used in a functional double-beam, the wire is reflexed to halve the artificial tension at the tendon end.

[0060] like Figure 3 and Figure 4 As shown, the workstation is placed flat on the sterile table, and the required tendons are removed from the patient's body and pre-tensioned and braided on the sterile table. Therefore, both ends of the tendon must 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 is passed by the upper pulley 2 and connected to the top of the reset column 4, and 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] By rotating the fixed turntable 51 through the handle, the coaxial lower pulley 53 rotates, driving the metal wire to pull the reset column 4 downward, and the reset column 4 squeezes the compression spring 42 to contract, while pulling the top metal wire, changing the direction of the force through the upper pulley 2, and finally applying it to the tendon.

[0062] The functional double-bundle tendon has only one free end, while in the anatomical single-bundle and double-bundle, 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 metal wire above, and the other end needs to be fixed to this kit to stretch the tendon.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached 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 arranged above 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 arranged below the upper pulley (2), and the spring assembly is used to convert force into spring compression for measurement; A curling assembly is provided below one side of the metal plate (1), and the curling assembly is used to curl the metal wire; A functional double-bundle kit and an anatomical single-bundle and anatomical double-bundle kits are respectively arranged above and below one side of the metal plate (1). The functional double-bundle kit provides an attachment point for the folding of the metal wire, and the anatomical single-bundle and anatomical double-bundle kits are used to provide an attachment point for tensioning an isolated tendon.

2. A tendon pretensioning device according to claim 1, characterized in that: The spring assembly comprises a reset column (4) arranged below the upper pulley (2); a fixing seat (41) is arranged at the upper and lower ends of the reset column (4); the fixing seat (41) is fixed on the metal plate (1); a stopper (43) is arranged below the upper end fixing seat (41); the stopper (43) is fixed to the outside of the reset column (4); a compression spring (42) is arranged below the stopper (43); and the compression spring (42) is wound around the outside of the reset column (4).

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

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

5. A tendon pretensioning device according to claim 4, characterized in that: The anatomical single-beam and anatomical double-beam kits include a lower cube (6) arranged below one side of a metal plate (1), a through hole (64) is provided inside the lower cube (6), 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), and a fixing part 2 (65) is 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 threadedly connected to a metal handle (11), and the bottom of the metal handle (11) is connected to an extension handle (12).

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