Medical fine steel cable material reliability detection system

Abstract

The invention discloses a medical fine steel cable material reliability detection system, and belongs to the technical field of medical fine steel cables, the medical fine steel cable material reliability detection system comprises a test board for detecting a steel cable and two simulation test slide rails, the inner side walls of the simulation test slide rails are slidably connected with a state monitoring box, and the state monitoring box is slidably provided with a simulation skeleton; the end of the simulation framework is connected with a monitoring assembly used for simulating the state change of the simulation framework after the steel cable applies tension, and a plurality of air pressure grooves are formed in the side wall of the simulation framework. According to the invention, through the arrangement of the monitoring assembly, the abstract tensioning force applied by the steel cable can be directly converted and displayed as specific pressure data of the simulated skeleton in real time by utilizing the synergistic effect of the tension spring, the sliding limiting seat and the pressure sensor; therefore, the potential compression injury risk of the steel cable to the skeleton under different tensile forces can be quantitatively evaluated, and the accuracy and reliability of test data are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of medical precision steel cable technology, and in particular to a reliability testing system for medical precision steel cable materials. Background Technology

[0002] Medical precision steel cable is an orthopedic implant material made of multiple strands of ultra-high-quality medical-grade stainless steel or cobalt-chromium alloy wires through a precision braiding process. In orthopedic surgery, it is widely used for cerclage fixation of large bones such as the femur and tibia, as well as tension band fixation. The standard procedure involves wrapping or passing the cable around or through the bone, threading both ends through specialized cable loops, applying precise pretension using a tensioner, and finally flattening the cable loops with a pressure device to permanently lock them in place, thus forming a stable ring-shaped fixation structure.

[0003] However, in actual surgical procedures, especially when performing long-path circumduction on large bones, surgeons often find it difficult to complete the procedure in one go and need to alternately clamp the end of the cable multiple times for threading. This process can easily cause the cable to twist or even form knots, severely altering its mechanical properties. Such knots not only significantly increase the internal friction loss of the cable, leading to uneven stress distribution, but also significantly reduce the overall strength of the cable at the twist point, posing a potential safety risk. In addition, the surgical wound environment further exacerbates the uncontrollability of the cable's performance. Foreign matter such as blood, tissue fluid, and bone fragments can easily adhere to the cable surface, changing its coefficient of friction. At the same time, the friction state faced by the cable when passing through bone passages, around sharp bone edges, or being compressed by soft tissue is complex and variable. These factors work together to directly affect the sliding performance and final fixation strength of the cable. Based on this, a reliability testing system for medical precision steel cable materials is proposed. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a reliability testing system for medical precision steel cable materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A reliability testing system for medical precision steel cable materials includes a test bench for testing the steel cable and two simulated test slide rails. A state monitoring box is slidably connected to the inner wall of the simulated test slide rails. A simulated skeleton is slidably arranged in the state monitoring box. A monitoring component for simulating the state change of the skeleton after the steel cable is subjected to tension is connected to the end of the simulated skeleton. Multiple air pressure grooves are opened on the side wall of the simulated skeleton. A simulated soft tissue airbag for simulating soft tissue state is connected to the inner wall of the air pressure groove. The front and rear side walls of the simulation test slide rail are fixed with lifting components by multiple mounting seats. The lifting components are connected to a kinking drive rack for driving the steel cable to twist and knot through an adjustment guide rail. The kinking drive rack is connected to a kinking cylinder for guiding the steel cable through a kinking gear. The kinking cylinder is equipped with a pressure application component for adjusting the tension of the steel cable during the test.

[0006] Preferably, the top of the test platform has two symmetrically arranged fixed side plates fixed by multiple supports. The front and rear ends of the fixed side plates are rotatably connected to winding rollers, and the simulated test slide rail is fixedly connected to the fixed side plates.

[0007] Preferably, the monitoring component includes a sliding limit seat fixed to the end of the simulated skeleton, the simulated skeleton being slidably connected to the status monitoring box via the sliding limit seat, and a pressure sensor being fixedly connected to the side wall of the sliding limit seat.

[0008] Preferably, a tension spring is fitted on the outer wall of the simulated skeleton, and the two ends of the tension spring are fixedly connected to the inner wall of the status monitoring box and the sliding limit seat, respectively. The adjacent end faces of the two simulated skeletons are inclined to match each other.

[0009] Preferably, the air pressure groove of the simulated skeleton is connected to an air pump system through an air channel, and the simulated skeleton is provided with multiple spray nozzles to simulate the wet friction state of the steel cable passing through the tissue fluid. The spray nozzles are connected to a hydraulic system.

[0010] Preferably, the lifting assembly includes a lifting guide rail fixed on the simulation test slide rail, the lifting guide rail is slidably connected to a flat seat through a convex slide block, the flat seat is fixedly connected to the adjustment guide rail, and the two flat seats are fixed to bearing stabilizing seats through two oblique rods.

[0011] Preferably, the adjusting guide rail is slidably connected to the kink drive rack, the kink drive rack meshes with the kink gear, the inner wall of the bearing stabilizer is rotatably connected to the kink cylinder, and the kink cylinder is fixedly connected to the kink gear.

[0012] Preferably, the pressure-applying component includes two pressure-limiting protrusions disposed inside the twisted cylinder, and two intersecting storage grooves are provided in the threading channel of the twisted cylinder, and the inner end face of the storage groove is fixedly connected to the pressure-limiting protrusions by two hydraulic push rods.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting up monitoring components, this solution can utilize the synergistic effect of tension springs, sliding limit seats, and pressure sensors to convert and display the abstract tension force applied by the steel cable in real time as specific pressure data on the simulated skeleton in a clear and intuitive manner. This allows for the quantitative assessment of the potential compressive damage risk to the skeleton caused by the steel cable under different tensions, greatly improving the accuracy and reliability of the test data.

[0014] 2. This solution simulates the soft tissue airbag and spray net settings. The spray net can simulate the tissue fluid and blood environment to test the wet friction performance of the steel cable. By simulating the collapse and expansion of the soft tissue airbag, it dynamically simulates the different states of the steel cable passing around sharp bone edges and being wrapped in soft tissue. The multi-state composite test can obtain the performance data of the steel cable under different friction conditions, making the test results closer to clinical reality and providing richer data dimensions.

[0015] 3. This solution, through the setting of kink drive rack and kink cylinder, can actively control the steel cable to generate controllable kinks using a unique kink drive mechanism (kink drive rack, kink gear and kink cylinder). It is specifically designed to assess the fatal impact of this common clinical operation error on the strength of the steel cable, which is something that traditional unidirectional tensile testing cannot achieve. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a reliability testing system for medical precision steel cable materials proposed in this invention; Figure 2 This is an overall assembly drawing of a medical precision steel cable material reliability testing system proposed in this invention; Figure 3 This is a schematic diagram of the structure of two simulated skeleton positions in a reliability testing system for medical precision steel cable materials proposed in this invention; Figure 4 This is a cross-sectional view of the status monitoring box in a medical precision steel cable material reliability testing system proposed in this invention; Figure 5 This is a schematic diagram of the connection between a simulated soft tissue airbag and a simulated skeleton in a medical precision steel cable material reliability testing system proposed in this invention; Figure 6 This is a schematic diagram of the position of the kink drive rack in a reliability testing system for medical precision steel cable materials proposed in this invention. Figure 7 This is an assembly diagram of the kink cylinder in a medical precision steel cable material reliability testing system proposed in this invention; Figure 8 This is a cross-sectional view of the kink in a reliability testing system for medical precision steel cable materials proposed in this invention.

[0017] In the diagram: 1. Test bench; 2. Simulated test slide rail; 3. Fixed side plate; 4. Take-up roller; 5. Status monitoring box; 6. Simulated skeleton; 7. Sliding limit seat; 8. Tension spring; 9. Pressure sensor; 10. Simulated soft tissue airbag; 11. Spray net; 12. Lifting guide rail; 13. Convex slide; 14. Flat seat; 15. Adjustment guide rail; 16. Twisted drive rack; 17. Bearing stabilizer; 18. Twisted cylinder; 19. Twisted gear; 20. Hydraulic push rod; 21. Pressure limiting convex plate. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example, refer to Figures 1 to 8 A reliability testing system for medical precision steel cable materials includes a test bench 1 for testing the steel cable and two simulated test slide rails 2. A state monitoring box 5 is slidably connected to the inner wall of the simulated test slide rail 2. A simulated skeleton 6 is slidably set in the state monitoring box 5. A monitoring component for simulating the state change of the simulated skeleton 6 after the steel cable is subjected to tension is connected to the end of the simulated skeleton 6. Furthermore, the top of the test platform 1 is fixed with two symmetrically arranged fixed side plates 3 by multiple supports. The front and rear ends of the fixed side plates 3 are rotatably connected with winding rollers 4. The simulated test slide rail 2 is fixedly connected to the fixed side plates 3. The monitoring component includes a sliding limit seat 7 fixed to the end of the simulated skeleton 6. The simulated skeleton 6 is slidably connected to the status monitoring box 5 through the sliding limit seat 7. A pressure sensor 9 is fixedly connected to the side wall of the sliding limit seat 7. A tension spring 8 is sleeved on the outer side wall of the simulated skeleton 6. The two ends of the tension spring 8 are fixedly connected to the inner side wall of the status monitoring box 5 and the sliding limit seat 7, respectively. The adjacent end faces of the two simulated skeletons 6 are inclined in a mutually compatible manner. It should be noted that: the new medical steel cable to be tested is wound onto one of the take-up rollers 4. Then, the cable is passed through the twisting cylinder 18 and wound around the outer walls of the two simulated skeletons 6. The cable is then passed through another twisting cylinder 18 and wound onto the other take-up roller 4. The two take-up rollers 4 keep the new medical steel cable under slight tension. As the tension applied to the cable increases, the winding pressure of the cable on the two simulated skeletons 6 also increases. Therefore, as the pressure at the inclined end between the two simulated skeletons 6 increases, the simulated skeletons 6 will be tilted towards... The state monitoring box 5 is pushed in, so that the simulated skeleton 6 stretches and tightens the spring 8 through the sliding limit seat 7, and the pressure sensor 9 senses the pressure change on the inner wall of the state monitoring box 5, so that the steel cable is subjected to different tension forces, which affects the winding pressure of the simulated skeleton 6. The data changes of the pressure sensor 9 in the state monitoring box 5 are intuitively displayed. In this process, by adjusting the sliding position of the state monitoring box 5 in the simulation test slide rail 2, the direction of the steel cable winding force on the simulated skeleton 6 is changed. During the simulated surgery, the surgeon guides the skeleton at different angles. The advantages mentioned above are that the winding pressure applied by the steel cable to the simulated frame 6 is controllable and visible throughout the entire test process, and the pressure influence on the steel cable at the simulated frame 6 is also controllable and visible, thus ensuring the reliability of the test data. Multiple air pressure grooves are provided on the side wall of the simulated skeleton 6, and simulated soft tissue airbags 10 for simulating soft tissue conditions are connected to the inner side wall of the air pressure grooves. Furthermore, the air pressure tank of the simulated skeleton 6 is connected to an air pump system through an air passage, and multiple spray nozzles 11 are provided on the simulated skeleton 6 to simulate the wet friction state of the steel cable passing through the tissue fluid. The spray nozzles 11 are connected to a hydraulic system. It should be noted that during the test, the spray nozzles 11 on the simulated skeleton 6 will spray out a liquid with a certain viscosity to simulate the state of the steel cable encountering tissue fluid or blood during the threading process. The steel cable will be subjected to wet friction as it moves around on the simulated skeleton 6, replicating the actual state of the steel cable during surgery. At the same time, the air passages in the air pressure groove of the simulated skeleton 6 will be in two states of negative pressure and high pressure through suction and blowing, causing the simulated soft tissue airbag 10 to collapse and expand, simulating the state of the steel cable encountering sharp bone edges and soft tissue during the threading process. The benefits mentioned above are as follows: the combined changes in these states cause the friction of the steel cable to change to different degrees during the threading process. That is, the test shows the working strength of the steel cable in different areas or environments under the same tension force, making the test data richer and ensuring the stability of the test. The front and rear side walls of the simulated test slide rail 2 are fixed with lifting components by multiple mounting seats. The lifting components are connected to a twist drive rack 16 for driving the steel cable to twist and knot through the adjustment guide rail 15. The twist drive rack 16 is connected to a twist cylinder 18 for guiding the steel cable through the twist gear 19. The twist cylinder 18 is equipped with a pressure application component for adjusting the tension of the steel cable during the test.

[0022] Furthermore, the lifting assembly includes a lifting guide rail 12 fixed on the simulation test slide rail 2. The lifting guide rail 12 is slidably connected to a flat seat 14 via a convex slide seat 13. The flat seat 14 is fixedly connected to an adjusting guide rail 15. The two flat seats 14 are fixed to a bearing stabilizing seat 17 via two inclined rods. The adjusting guide rail 15 is slidably connected to a kink drive rack 16. The kink drive rack 16 meshes with a kink gear 19. The inner side wall of the bearing stabilizing seat 17 is rotatably connected to a kink cylinder 18. The kink cylinder 18 is fixedly connected to the kink gear 19. The pressure application assembly includes two pressure limiting protrusions 21 disposed inside the kink cylinder 18. Two intersecting storage slots are opened in the wire threading channel of the kink cylinder 18. The inner end face of the storage slot is fixedly connected to the pressure limiting protrusions 21 via two hydraulic push rods 20. It should be noted that after the above tests are completed, the sliding of the convex slide block 13 within the lifting guide rail 12 can be controlled to change the insertion and exit angles of the steel cable, thereby realizing the influence of different angle operations when fixing different parts of the skeleton, enriching the test data. After the steel cable passes through the twisting cylinder 18, the steel cable inside the twisting cylinder 18 is in a wave-shaped fixed and limited state under the alternating pressing action of the two pressure limiting convex plates 21. Then, the hydraulic push rod 20 controls the pressure limiting convex plates 21 in the receiving groove. The extension and retraction control the overall tension of the steel cable, facilitating the testing of the cable's strength under high tension. Subsequently, when simulating a kink in the steel cable, the sliding of the kink drive rack 16 within the adjustment guide rail 15 is controlled, allowing the kink drive rack 16 to drive the meshing kink gear 19 to rotate. The kink gear 19 then drives the kink cylinder 18 to deflect. Since the steel cable is tensioned and limited by the two intersecting pressure limiting convex plates 21, the steel cable will kink along with the kink cylinder 18. The advantages mentioned above are: it facilitates the simulation tests to be performed when the steel cable is in a kinked state, and reproduces the state in which the steel cable is prone to local kinking during the process of threading the large skeleton, making the whole test more complete and ensuring that the strength of the new material steel cable under skeleton pressure in a kinked state, as well as the strength of the tension applied during threading, are qualified. In use, the medical steel cable of the new material to be tested is wound onto a take-up roller 4 on one side. Then, the cable is passed through a twisting cylinder 18 and wound around the outer walls of two simulated skeletons 6. The cable is then passed through another twisting cylinder 18 and wound onto a take-up roller 4 on the other side. The two take-up rollers 4 keep the medical steel cable of the new material to be tested in a slightly taut state. As the tension applied to the cable increases, the winding pressure of the cable on the two simulated skeletons 6 also increases. As the pressure at the inclined end between the two simulated skeletons 6 increases, the simulated skeletons 6 are pushed into the state monitoring box 5, causing the simulated skeletons 6 to stretch the tension spring 8 through the sliding limit seat 7, thus reducing the pressure. Force sensor 9 senses pressure changes on the inner wall of the state monitoring box 5, causing different tension forces to be applied to the steel cable. The effect of this tension on the winding pressure of the simulated skeleton 6 is visually represented by the data changes of the pressure sensor 9 inside the state monitoring box 5. During this process, by adjusting the sliding position of the state monitoring box 5 in the simulation test slide rail 2, the direction of the steel cable winding force on the simulated skeleton 6 is changed. During the simulated surgery, the surgeon guides the skeleton at different angles, making the winding pressure applied by the steel cable to the simulated skeleton 6 controllable and visible throughout the entire test. Therefore, the pressure effect of the steel cable on the simulated skeleton 6 is also controllable and visible, ensuring the reliability of the test data. During the test, the spray nozzles 11 on the simulated skeleton 6 spray out a viscous liquid to simulate the state of the steel cable encountering tissue fluid or blood during the threading process. The steel cable will be subjected to wet friction as it moves and winds around the simulated skeleton 6, replicating the actual state of the steel cable during surgery. At the same time, the air passages in the air pressure groove of the simulated skeleton 6 will be in two states, negative pressure and high pressure, through suction and blowing, causing the simulated soft tissue airbag 10 to collapse and expand, simulating the state of the steel cable encountering sharp bone edges and soft tissue during the threading process. The combined changes of these states cause the friction of the steel cable to change to different degrees during the threading process. That is, the test shows the working strength of the steel cable in different areas or environmental conditions under the same tension force, making the test data richer and ensuring the stability of the test. After the above tests are completed, the sliding of the convex slide 13 within the lifting guide rail 12 can be controlled to change the insertion and exit angles of the steel cable, thus realizing the influence of different angle operations when fixing different parts of the skeleton, enriching the test data. After the steel cable passes through the twisting cylinder 18, the steel cable inside the twisting cylinder 18 is in a wave-shaped fixed and limited state under the staggered pressing action of the two pressure limiting convex plates 21. Then, the hydraulic push rod 20 can control the overall tension of the steel cable by controlling the pushing and retracting of the pressure limiting convex plates 21 in the receiving groove, which is convenient for testing the strength of the steel cable under large tension. Subsequently, when simulating the situation of the steel cable being twisted, The sliding of the control kink drive rack 16 within the adjustment guide rail 15 allows the kink drive rack 16 to drive the meshing kink gear 19 to rotate. The kink gear 19 then drives the kink cylinder 18 to deflect. Due to the tensioning and limiting of the steel cable by the two intersecting pressure limiting convex plates 21, the steel cable will kink along with the kink cylinder 18. This facilitates the simulation tests mentioned above when the steel cable is in a kinked state, replicating the state where the steel cable is prone to local kinking during the large skeleton threading process. This makes the entire test more complete and ensures that the strength of the new material steel cable under skeleton pressure in a kinked state, as well as the strength of the tension applied during threading, are qualified.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A reliability testing system for medical precision steel cables, comprising a test bench (1) for testing the steel cables and two simulated test slides (2), characterized in that, The inner wall of the simulation test slide rail (2) is slidably connected to a state monitoring box (5), and the state monitoring box (5) is slidably provided with a simulation skeleton (6). The end of the simulation skeleton (6) is connected to a monitoring component for simulating the state change of the simulation skeleton (6) after the steel cable is subjected to tension. Multiple air pressure grooves are opened on the side wall of the simulation skeleton (6), and the inner wall of the air pressure groove is connected to a simulation soft tissue airbag (10) for simulating the soft tissue state. The front and rear side walls of the simulation test slide rail (2) are fixed with lifting components by multiple mounting seats. The lifting components are connected to a twist drive rack (16) for driving the steel cable to twist and knot through the adjustment guide rail (15). The twist drive rack (16) is connected to a twist cylinder (18) for guiding the steel cable to pass through through the twist gear (19). The twist cylinder (18) is provided with a pressure application component for adjusting the tension of the steel cable during the test.

2. The medical precision steel cable material reliability testing system according to claim 1, characterized in that, The test bench (1) has two symmetrically arranged fixed side plates (3) fixed at the top of the test bench (1) by multiple supports. The front and rear ends of the fixed side plates (3) are rotatably connected to the winding rollers (4). The simulated test slide rail (2) is fixedly connected to the fixed side plates (3).

3. The reliability testing system for medical precision steel cable materials according to claim 1, characterized in that, The monitoring component includes a sliding limit seat (7) fixed to the end of the simulation skeleton (6). The simulation skeleton (6) is slidably connected to the status monitoring box (5) through the sliding limit seat (7). A pressure sensor (9) is fixedly connected to the side wall of the sliding limit seat (7).

4. The reliability testing system for medical precision steel cable materials according to claim 1, characterized in that, The outer wall of the simulated skeleton (6) is fitted with a tension spring (8), and the two ends of the tension spring (8) are fixedly connected to the inner wall of the status monitoring box (5) and the sliding limit seat (7) respectively. The adjacent end faces of the two simulated skeletons (6) are inclined to match each other.

5. The reliability testing system for medical precision steel cable materials according to claim 1, characterized in that, The air pressure groove of the simulated skeleton (6) is connected to an air pump system through an air channel. The simulated skeleton (6) is provided with multiple spray net openings (11) to simulate the wet friction state of the steel cable passing through the tissue fluid. The spray net openings (11) are connected to a hydraulic system.

6. The reliability testing system for medical precision steel cable materials according to claim 1, characterized in that, The lifting assembly includes a lifting guide rail (12) fixed on the simulation test slide rail (2). The lifting guide rail (12) is slidably connected to a plane seat (14) via a convex slide (13). The plane seat (14) is fixedly connected to the adjustment guide rail (15). The two plane seats (14) are fixed to a bearing stabilizing seat (17) via two oblique rods.

7. The reliability testing system for medical precision steel cable materials according to claim 6, characterized in that, The adjustment guide rail (15) is slidably connected to the kink drive rack (16), the kink drive rack (16) meshes with the kink gear (19), the inner wall of the bearing stabilizer (17) is rotatably connected to the kink cylinder (18), and the kink cylinder (18) is fixedly connected to the kink gear (19).

8. The medical precision steel cable material reliability testing system according to claim 1, characterized in that, The pressure application assembly includes two pressure limiting protrusions (21) disposed inside the twisted cylinder (18). Two intersecting storage slots are provided in the threading channel of the twisted cylinder (18). The inner end face of the storage slot is fixedly connected to the pressure limiting protrusions (21) by two hydraulic push rods (20).

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