Guide wire tension detection system

Abstract

The invention relates to the field of mechanical testing, and provides a guide wire tension detection system, which comprises a guide wire clamping module, the guide wire clamping module comprises a testing clamp and a testing pipeline, the testing clamp is used for clamping two ends of a to-be-tested guide wire, the to-be-tested guide wire is located in the testing pipeline when the to-be-tested guide wire is clamped by the testing clamp, and the testing pipeline is used for testing tension of the to-be-tested guide wire; simulation liquid for simulating a blood vessel environment is arranged in the test pipeline; the fatigue test module is used for performing twisting operation and / or stretching operation on the to-be-tested guide wire based on preset fatigue test parameters, so that the to-be-tested guide wire is in a fatigue state and corresponding fatigue test information is obtained; the tension test module is used for applying axial tension to the to-be-tested guide wire in the fatigue state until the to-be-tested guide wire is broken, and fatigue peak tension of the to-be-tested guide wire is obtained; and the result output module is used for outputting a test result of the to-be-tested guide wire according to the fatigue test information and the fatigue peak tension.

Description

Technical Field

[0001] This application relates to the field of mechanical testing, and more particularly to a guide wire tension detection system. Background Technology

[0002] Guidewires are commonly used instruments in coronary interventional procedures, used to enter the coronary arteries and establish pathways for delivering balloons, stents, and microcatheters. During surgery, guidewires face complex operating environments, such as traversing tortuous, calcified, and narrowed blood vessels, and may experience unexpected and abnormal tension. To ensure the guidewire does not easily break and thus protect patient safety, tension testing is necessary. However, the risk of guidewire breakage is primarily concentrated during retraction, and existing tension tests struggle to simulate the complex environment faced by the guidewire during surgery, resulting in inaccurate reflection of its performance during retraction within the surgical context. Therefore, how to simulate the surgical environment during guidewire tension testing to improve its accuracy has become a pressing issue. Summary of the Invention

[0003] The main objective of this application is to provide a guidewire tension testing system that simulates the environment of the guidewire during surgery during the guidewire tension testing process, thereby improving the accuracy of the guidewire tension testing.

[0004] In a first aspect, this application provides a guidewire tension detection system, the guidewire tension detection system comprising: A guidewire clamping module includes a test clamp and a test tube. The test clamp is used to clamp both ends of the guidewire to be tested. When the guidewire to be tested is clamped in the test clamp, the guidewire to be tested is located in the test tube. The test tube is provided with a simulated fluid for simulating the vascular environment. The fatigue testing module is used to perform torsion and / or extension operations on the guide wire under test based on preset fatigue testing parameters, so as to put the guide wire under test into a fatigue state and obtain corresponding fatigue testing information. A tensile testing module is used to apply axial tensile force to the guide wire under fatigue state until the guide wire breaks, and to obtain the fatigue peak tensile force of the guide wire. The result output module is used to output the test results of the guide wire under test based on the fatigue test information and the fatigue peak tensile force.

[0005] In some implementations, the test results include strength retention rate, and the step of outputting the test results of the guide wire under test based on the fatigue test information and the peak fatigue tensile force includes: Obtain the peak tension required to apply an axial tensile force to the guidewire under normal conditions until the guidewire breaks; The peak fatigue tensile force of the guide wire under test under different fatigue states is obtained, and the strength retention rate of the guide wire under test under different fatigue states is determined according to the ratio of the peak fatigue tensile force to the conventional peak tensile force, wherein the number of torsions and / or the number of extensions and retractions corresponding to the guide wires under test under different fatigue states are different.

[0006] In some embodiments, the test result further includes a failure threshold, and the step of outputting the test result of the guide wire under test based on the fatigue test information and the fatigue peak tensile force further includes: Based on the strength retention rate, plot the strength retention rate curve as a function of the number of torsion cycles and / or the number of expansion cycles; Integrate the strength retention rate curve to obtain the target integral value corresponding to the maximum number of torsion cycles and / or the maximum number of expansion cycles on the strength retention rate curve; A failure threshold is determined based on the target integral value. The failure threshold includes: the number of threshold torsions and / or the number of threshold expansions. The ratio of the integral threshold corresponding to the number of threshold torsions and / or the number of threshold expansions to the target integral value is a preset ratio.

[0007] In some embodiments, the fatigue test parameters include torsion parameters and / or extension parameters. The process of performing torsion and / or extension operations on the guidewire under test based on preset fatigue test parameters to subject the guidewire to a fatigue state and obtain corresponding fatigue test information includes: The guide wire under test is subjected to a torsion operation based on the torsion parameters, and / or stretched and compressed based on the extension parameters, so that the guide wire under test is in a fatigue state; wherein, the torsion parameters include: torsion angle and torsion speed, and the extension parameters include: stroke amplitude and loading frequency; The proximal input torque and distal output torque of the guidewire under test in a fatigue state are obtained, and the first torque transmission efficiency is determined based on the ratio of the distal output torque to the proximal input torque. Based on the mapping relationship between torque transmission efficiency and guide wire length, the target torque transmission efficiency is determined according to the first torque transmission efficiency.

[0008] In some embodiments, obtaining the bending stiffness and torque transmission efficiency of the guide wire under fatigue state to obtain the fatigue test information includes: The guide wire under fatigue condition is placed between two support points, and a load is applied to the guide wire to obtain the deflection of the guide wire under the load. The bending stiffness is determined based on the span between the support points, the load, and the deflection.

[0009] In some embodiments, obtaining the bending stiffness and torque transmission efficiency of the guide wire under fatigue state to obtain the fatigue test information includes: The proximal input torque and distal output torque of the guidewire under test in a fatigue state are obtained, and the first torque transmission efficiency is determined based on the ratio of the distal output torque to the proximal input torque. Based on the mapping relationship between torque transmission efficiency and guide wire length, the target torque transmission efficiency is determined according to the first torque transmission efficiency.

[0010] In some embodiments, the step of performing torsion and / or extension operations on the guidewire under test based on preset fatigue test parameters to subject the guidewire to a fatigue state and obtain corresponding fatigue test information includes: The length of the guide wire to be tested is determined based on the distance between the test fixtures; The stroke range of the telescopic operation and the torsion angle of the torsion operation are determined based on the guide wire length.

[0011] In some embodiments, determining the stroke range of the telescopic operation and the torsion angle of the torsion operation based on the guidewire length includes: The stroke range is determined based on the guidewire length using the following formula: ; Where L represents the guidewire length and A represents the stroke range. This indicates the preset length, and k is the preset S-curve parameter. It represents the frequency of a sine wave.

[0012] In some embodiments, determining the stroke range of the telescopic operation and the torsion angle of the torsion operation based on the guidewire length includes: Obtain the shear modulus, polar moment of inertia, and proportionality constant between the torque and the test wire; The torsional constant is determined based on the ratio of the proportionality constant to the product of the shear modulus and the polar moment of inertia; The torsion constant is multiplied by the square of the length of the guide wire to be tested to obtain the torsion angle.

[0013] This application provides a guidewire tension testing system. The system includes a guidewire clamping module comprising a test fixture and a test tube. The test fixture clamps both ends of the guidewire under test, and the guidewire is located within the test tube when clamped. The test tube contains a simulated fluid to simulate a vascular environment. A fatigue testing module is used to perform torsional and / or extension / retraction operations on the guidewire under test based on preset fatigue testing parameters, thereby subjecting the guidewire to a fatigue state and obtaining corresponding fatigue test information. A tension testing module applies axial tension to the fatigued guidewire until it breaks, obtaining the peak fatigue tension of the guidewire. A result output module outputs the test results of the guidewire under test based on the fatigue test information and the peak fatigue tension. By immersing the guidewire in a simulated liquid and performing fatigue tests, including torsion and / or retraction, the fatigue of the guidewire during a real surgical procedure is simulated, thus improving the accuracy of the guidewire tension test by mimicking the environment of the guidewire during surgery. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic block diagram of a guide wire tension detection system provided in an embodiment of this application; Figure 2 A schematic flowchart illustrating a guidewire tension detection method provided in an embodiment of this application; Figure 3 This is a schematic block diagram of the structure of a computer device according to an embodiment of this application. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0018] This application provides a guide wire tension detection system.

[0019] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] Please refer to Figure 1 , Figure 1 This is a schematic block diagram of a guide wire tension detection system provided in one embodiment of this application.

[0021] like Figure 1 As shown, the guide wire tension testing system includes: a guide wire clamping module 110, a fatigue testing module 120, a tension testing module 130, and a result output module 140.

[0022] The guidewire clamping module 110 includes a test clamp and a test tube. The test clamp is used to clamp both ends of the guidewire to be tested. When the guidewire to be tested is clamped in the test clamp, the guidewire to be tested is located in the test tube. The test tube is provided with a simulated fluid for simulating the vascular environment. The fatigue testing module 120 is used to perform torsion and / or extension operations on the guide wire under test based on preset fatigue testing parameters, so as to put the guide wire under test into a fatigue state and obtain corresponding fatigue testing information. The tensile testing module 130 is used to apply axial tensile force to the guide wire under test in the fatigue state until the guide wire under test breaks, and to obtain the fatigue peak tensile force of the guide wire under test. Result output module 140, the result output module is used to output the test results of the guide wire under test according to the fatigue test information and the fatigue peak tensile force.

[0023] For example, guidewires undergo repeated bending, twisting, and passage through narrow and tortuous blood vessels during use, subjecting them to significant mechanical stress. Repeated pushing and twisting can lead to subtle permanent deformation or fatigue, resulting in curled guidewires after use. Therefore, there is a greater risk of breakage during guidewire retraction. However, guidewire tensile testing in related technologies is typically performed on brand-new guidewires, making it difficult to assess the mechanical properties of used guidewires during retraction.

[0024] For example, in this embodiment of the application, the guidewire to be tested is placed in a simulated liquid to simulate the environment in a blood vessel. The simulated liquid can be, for example, physiological saline. In order for the test fixture to be able to test guidewires of different lengths, the spacing between the test fixtures can be adjusted within a certain range, for example, the adjustable range of the spacing between the test fixtures can be 10cm-90cm.

[0025] For example, the fatigue test involves repeatedly twisting the guidewire immersed in a simulated solution, simulating the surgeon adjusting the guidewire's direction by applying torque during surgery; and repeatedly extending and retracting the guidewire, also immersed in the simulated solution, simulating the delivery and retraction of the guidewire during surgery. The fatigue test subjects the guidewire to a fatigued state, simulating the state of the guidewire after use.

[0026] For example, the test results include the strength retention rate, failure threshold, and fatigue test information determined based on the peak fatigue tensile force, and the result output module can display the above information on the terminal device.

[0027] In some implementations, the test results include strength retention rate, and the step of outputting the test results of the guide wire under test based on the fatigue test information and the peak fatigue tensile force includes: Obtain the peak tension required to apply an axial tensile force to the guidewire under normal conditions until the guidewire breaks; The peak fatigue tensile force of the guide wire under test under different fatigue states is obtained, and the strength retention rate of the guide wire under test under different fatigue states is determined according to the ratio of the peak fatigue tensile force to the conventional peak tensile force, wherein the number of torsions and / or the number of extensions and retractions corresponding to the guide wires under test under different fatigue states are different.

[0028] For example, the guidewire under fatigue condition can be a guidewire that has only undergone a torsion operation, a guidewire that has only undergone a telescoping operation, or a guidewire that has undergone both a torsion operation and a telescoping operation.

[0029] For example, peak tensile force is the maximum tensile force that the guide wire withstands before breaking during the stretching process. The guide wire under test in its normal state is the guide wire that has not undergone fatigue testing; the peak tensile force measured under normal conditions is the normal peak tensile force; the peak tensile force measured under fatigue conditions is the fatigue peak tensile force. Understandably, the fatigue peak tensile force measured after torsion and / or stretching is usually less than the normal peak tensile force. Therefore, the ratio of fatigue peak tensile force to normal peak tensile force is a value less than 1, used to indicate the degree of strength retention of the guide wire after the fatigue test.

[0030] For example, the number of torsion cycles and / or extension cycles corresponding to the guidewire under test in different fatigue states are different. Taking only torsion operations on the guidewire as an example, assuming the upper limit of the number of torsion cycles is 5000, the number of torsion cycles corresponding to the guidewire under test in different fatigue states can be 1000, 2000, 3000, 4000, and 5000 torsion cycles, respectively. By measuring the peak fatigue tensile force of the guidewire under test after different torsion cycles, the strength retention rate of the guidewire under test after different torsion cycles is determined. It can be understood that the strength retention rate is inversely proportional to the number of torsion cycles and / or extension cycles.

[0031] In some embodiments, the test result further includes a failure threshold, and the step of outputting the test result of the guide wire under test based on the fatigue test information and the fatigue peak tensile force further includes: Based on the strength retention rate, plot the strength retention rate curve as a function of the number of torsion cycles and / or the number of expansion cycles; Integrate the strength retention rate curve to obtain the target integral value corresponding to the maximum number of torsion cycles and / or the maximum number of expansion cycles on the strength retention rate curve; A failure threshold is determined based on the target integral value. The failure threshold includes: the number of threshold torsions and / or the number of threshold expansions. The ratio of the integral threshold corresponding to the number of threshold torsions and / or the number of threshold expansions to the target integral value is a preset ratio.

[0032] For example, the strength retention rate of the guidewire under test in different fatigue states is fitted to obtain a strength retention rate curve. The strength retention rate curve includes a "twist count - strength retention rate curve" and / or a "twist count - strength retention rate curve". Taking the "twist count - strength retention rate curve" as an example, the starting point of the horizontal axis of the strength retention rate curve is 0 times the number of twists, and the ending point is the maximum number of twists, such as 5000 times.

[0033] For example, the guidewire failure threshold is determined based on the strength retention rate curve. This failure threshold indicates when the guidewire needs to be replaced. In some extreme cases, such as after angiography requiring multiple balloons or stents, the procedure may be lengthy, leading to significant guidewire wear and potentially a decrease in guidewire strength during the procedure, necessitating replacement. In such cases, the guidewire failure threshold can be used to determine whether replacement is necessary.

[0034] For example, the strength retention rate curve is integrated from the start point to the end point of the horizontal axis to obtain the target integral value, which is the area under the curve of the strength retention rate curve. The number of twists when the integral value reaches the integration threshold is determined as the threshold twist count, and / or the number of stretches when the integral value reaches the integration threshold is determined as the threshold stretch count. The ratio of the integration threshold to the target integral value is a preset proportion, for example, 80%, meaning the area under the curve corresponding to the integration threshold accounts for 80% of the area under the curve of the entire strength retention rate curve.

[0035] For example, the angle of twist or the amplitude of extension / retraction of the guidewire can be accumulated during the procedure. When the accumulated angle of twist or the amplitude of extension / retraction reaches the failure threshold, it is determined that the guidewire needs to be replaced. By determining the failure threshold, the guidewire can be maintained at a certain strength during the procedure, reducing the risk of guidewire breakage.

[0036] In some embodiments, the fatigue test parameters include torsion parameters and / or extension parameters. The process of performing torsion and / or extension operations on the guidewire under test based on preset fatigue test parameters to subject the guidewire to a fatigue state and obtain corresponding fatigue test information includes: The guide wire under test is subjected to a torsion operation based on the torsion parameters, and / or stretched and compressed based on the extension parameters, so that the guide wire under test is in a fatigue state; wherein, the torsion parameters include: torsion angle and torsion speed, and the extension parameters include: stroke amplitude and loading frequency; The bending stiffness and torque transmission efficiency of the guide wire under fatigue state are obtained to obtain the fatigue test information.

[0037] For example, the twisting operation can be performed by setting the twisting angle to a certain value, such as ±90 degrees or ±180 degrees, and then allowing the guidewire to twist cyclically between the forward and reverse directions. The twisting speed needs to be less than the preset angular velocity to prevent the thermal effect of the twisting from affecting the accuracy of the test. Therefore, the twisting parameters include: twisting angle, twisting speed, etc.

[0038] For example, the telescopic operation can be performed by setting parameters such as the tensile force and telescopic stroke of the testing machine, and then starting the testing machine to make the guide wire cycle between tension and compression at a certain frequency within the stroke range. Therefore, the telescopic parameters include: stroke range, loading frequency, etc.

[0039] For example, the performance of the guidewire under fatigue testing is measured, such as by measuring the bending performance of the guidewire under fatigue by measuring the bending stiffness and by measuring the torque transmission performance of the guidewire under fatigue by measuring the torque transmission efficiency, so as to obtain the fatigue test information of the guidewire and thus determine the impact of fatigue on the performance of the guidewire.

[0040] In some embodiments, obtaining the bending stiffness and torque transmission efficiency of the guide wire under fatigue state to obtain the fatigue test information includes: The guide wire under fatigue condition is placed between two support points, and a load is applied to the guide wire to obtain the deflection of the guide wire under the load. The bending stiffness is determined based on the span between the support points, the load, and the deflection.

[0041] For example, bending stiffness is an important concept in mechanics of materials. It reflects the ability of a guide wire to resist deformation when it is bent. By measuring whether the bending stiffness of the guide wire under fatigue condition meets the requirements of relevant standards, the bending performance of the guide wire can be evaluated.

[0042] Specifically, the bending stiffness is calculated according to the following formula. Where F represents the applied load (in Newtons), L represents the span between support points (in meters), and δ represents the deflection of the guide wire midpoint under load F (in meters).

[0043] In some embodiments, obtaining the bending stiffness and torque transmission efficiency of the guide wire under fatigue state to obtain the fatigue test information includes: The proximal input torque and distal output torque of the guidewire under test in a fatigue state are obtained, and the first torque transmission efficiency is determined based on the ratio of the distal output torque to the proximal input torque. Based on the mapping relationship between torque transmission efficiency and guide wire length, the target torque transmission efficiency is determined according to the first torque transmission efficiency.

[0044] For example, high-precision sensors are used to measure the torque at the proximal and distal ends of the guidewire, thereby obtaining the proximal input torque and the distal output torque. Torque transmission efficiency is the ratio of output torque to input torque in a mechanical transmission system. The torque transmission efficiency of the guidewire reflects whether the rotational force applied by the surgeon to the proximal end of the guidewire during operation can be efficiently transmitted to the distal end of the guidewire, and is an important indicator of guidewire performance.

[0045] For example, since the length of the guidewire being tested is relatively short, usually less than the length of the guidewire actually used during the operation, and the longer the guidewire is, the more likely it is to undergo torsional deformation, which leads to a decrease in torque transmission efficiency, it is necessary to map the first torque transmission efficiency of the guidewire to be tested to the target torque transmission efficiency of the full-length guidewire based on the mapping relationship between torque transmission efficiency and guidewire length.

[0046] For example, the full length of the guidewire is preset, such as 200cm. The torque transmission efficiency is inversely proportional to the guidewire length. The mapping relationship between torque transmission efficiency and guidewire length can be: .in, Indicates the target torque transmission efficiency. This indicates the first torque transmission efficiency of the guidewire under test. Indicates the preset full length. This indicates the length of the guidewire to be tested.

[0047] In some embodiments, the step of performing torsion and / or extension operations on the guidewire under test based on preset fatigue test parameters to subject the guidewire to a fatigue state and obtain corresponding fatigue test information includes: The length of the guide wire to be tested is determined based on the distance between the test fixtures; The stroke range of the telescopic operation and the torsion angle of the torsion operation are determined based on the guide wire length.

[0048] For example, since the distance between the test fixtures can be adjusted within a certain range, and the distance between the test fixtures is the length of the guide wire participating in the test, the guide wire length of the guide wire to be tested can be determined by obtaining the distance between the two test fixtures through a displacement sensor. For example, the distance between the test fixtures can be used as the guide wire length of the guide wire to be tested, or a certain length can be added to or subtracted from the distance between the test fixtures to obtain the guide wire length of the guide wire to be tested.

[0049] For example, in order to ensure uniform strain distribution, the stroke range and torsion angle during the guidewire fatigue test need to be determined based on the length of the guidewire under test.

[0050] In some embodiments, determining the stroke range of the telescopic operation and the torsion angle of the torsion operation based on the guidewire length includes: The stroke range is determined based on the guidewire length using the following formula: ; Where L represents the guidewire length and A represents the stroke range. This indicates the preset length, and k is the preset S-curve parameter. It represents the frequency of a sine wave.

[0051] For example, This is the basic part of the stroke range, indicating that the stroke range is approximately 1% of the guidewire length. Through An S-curve adjustment is introduced, where k is a parameter controlling the steepness of the S-curve. A larger k will make the curve steeper. For example, the value of k can be 0.01. When L approaches... At that time, the value of the S-curve is close to 1. (Through...) A sine wave adjustment is introduced, with the amplitude of the sine wave being 1 / 10 and the frequency controlled by ω, which can be, for example, 0.01. .

[0052] In some embodiments, determining the stroke range of the telescopic operation and the torsion angle of the torsion operation based on the guidewire length includes: The torsion angle is determined based on the guidewire length using the following formula: ; Wherein, θ represents the torsion angle, L represents the guide wire length, and α represents the preset torsion constant.

[0053] For example, the torsional constant reflects the torsional properties of the guidewire material, and the value of α will vary for different guidewire materials. The specific value of α can be determined experimentally; for example, if the length is known... The guidewire reached an angle of [angle value] under the torsion conditions used in the test. Then it can be done Determine the value of α.

[0054] For example, the stroke range and torsion angle provided by the above formula can simulate the effects of guidewire delivery, retraction, and torsion in blood vessels on the guidewire, as well as the effects of heartbeat and pulse on the guidewire.

[0055] Please see Figure 2 , Figure 2 This is a flowchart illustrating a guide wire tension detection method provided in one embodiment of this application.

[0056] like Figure 2 As shown, this application also provides a method for detecting guide wire tension, the method comprising steps S101-S104.

[0057] Step S101: Clamp both ends of the guidewire to be tested, and when the guidewire to be tested is clamped in the test fixture, the guidewire to be tested is located in the test channel, and the test channel is provided with a simulated liquid for simulating the vascular environment; Step S102: Perform torsion and / or extension operations on the guide wire under test based on preset fatigue test parameters, so that the guide wire under test is in a fatigue state and the corresponding fatigue test information is obtained. Step S103: Apply axial tensile force to the guide wire under fatigue state until the guide wire breaks, and obtain the fatigue peak tensile force of the guide wire. Step S104: Output the test results of the guide wire under test based on the fatigue test information and the fatigue peak tensile force.

[0058] In some implementations, the test results include strength retention rate, and the step of outputting the test results of the guide wire under test based on the fatigue test information and the peak fatigue tensile force includes: Obtain the peak tension required to apply an axial tensile force to the guidewire under normal conditions until the guidewire breaks; The peak fatigue tensile force of the guide wire under test under different fatigue states is obtained, and the strength retention rate of the guide wire under test under different fatigue states is determined according to the ratio of the peak fatigue tensile force to the conventional peak tensile force, wherein the number of torsions and / or the number of extensions and retractions corresponding to the guide wires under test under different fatigue states are different.

[0059] In some embodiments, the test result further includes a failure threshold, and the step of outputting the test result of the guide wire under test based on the fatigue test information and the fatigue peak tensile force further includes: Based on the strength retention rate, plot the strength retention rate curve as a function of the number of torsion cycles and / or the number of expansion cycles; Integrate the strength retention rate curve to obtain the target integral value corresponding to the maximum number of torsion cycles and / or the maximum number of expansion cycles on the strength retention rate curve; A failure threshold is determined based on the target integral value. The failure threshold includes: the number of threshold torsions and / or the number of threshold expansions. The ratio of the integral threshold corresponding to the number of threshold torsions and / or the number of threshold expansions to the target integral value is a preset ratio.

[0060] In some embodiments, the fatigue test parameters include torsion parameters and / or extension parameters. The process of performing torsion and / or extension operations on the guidewire under test based on preset fatigue test parameters to subject the guidewire to a fatigue state and obtain corresponding fatigue test information includes: The guide wire under test is subjected to a torsion operation based on the torsion parameters, and / or stretched and compressed based on the extension parameters, so that the guide wire under test is in a fatigue state; wherein, the torsion parameters include: torsion angle and torsion speed, and the extension parameters include: stroke amplitude and loading frequency; The bending stiffness and torque transmission efficiency of the guide wire under fatigue state are obtained to obtain the fatigue test information.

[0061] In some embodiments, obtaining the bending stiffness and torque transmission efficiency of the guide wire under fatigue state to obtain the fatigue test information includes: The guide wire under fatigue condition is placed between two support points, and a load is applied to the guide wire to obtain the deflection of the guide wire under the load. The bending stiffness is determined based on the span between the support points, the load, and the deflection.

[0062] In some embodiments, obtaining the bending stiffness and torque transmission efficiency of the guide wire under fatigue state to obtain the fatigue test information includes: The proximal input torque and distal output torque of the guidewire under test in a fatigue state are obtained, and the first torque transmission efficiency is determined based on the ratio of the distal output torque to the proximal input torque. Based on the mapping relationship between torque transmission efficiency and guide wire length, the target torque transmission efficiency is determined according to the first torque transmission efficiency.

[0063] In some embodiments, the step of performing torsion and / or extension operations on the guidewire under test based on preset fatigue test parameters to subject the guidewire to a fatigue state and obtain corresponding fatigue test information includes: The length of the guide wire to be tested is determined based on the distance between the test fixtures; The stroke range of the telescopic operation and the torsion angle of the torsion operation are determined based on the guide wire length.

[0064] In some embodiments, determining the stroke range of the telescopic operation and the torsion angle of the torsion operation based on the guidewire length includes: The stroke range is determined based on the guidewire length using the following formula: ; Where L represents the guidewire length and A represents the stroke range. This indicates the preset length, and k is the preset S-curve parameter. It represents the frequency of a sine wave.

[0065] In some embodiments, determining the stroke range of the telescopic operation and the torsion angle of the torsion operation based on the guidewire length includes: The torsion angle is determined based on the guidewire length using the following formula: ; Wherein, θ represents the torsion angle, L represents the guide wire length, and α represents the preset torsion constant.

[0066] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the methods and steps described above can be referred to the corresponding process in the aforementioned system embodiments, and will not be repeated here.

[0067] The methods and systems of this application can be used in a wide variety of general-purpose or special-purpose computing system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics devices, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0068] For example, the above-described method or system can be implemented as a computer program, which can be used in, for example... Figure 3 It runs on the computer device shown.

[0069] Please see Figure 3 , Figure 3 This is a schematic block diagram illustrating the structure of a computer device provided in an embodiment of this application. The computer device may be a server or a terminal.

[0070] like Figure 3 As shown, the computer device includes a processor, a memory, and a network interface connected via a system bus, wherein the memory may include a storage medium and internal memory.

[0071] The storage medium may store an operating system and a computer program. The computer program includes program instructions that, when executed, cause the processor to perform any guidewire tension detection method.

[0072] The processor provides computing and control capabilities, supporting the operation of the entire computer device.

[0073] The internal memory provides an environment for the execution of computer programs stored in the storage medium. When the computer program is executed by the processor, it enables the processor to perform any guide wire tension detection method.

[0074] This network interface is used for network communication, such as sending assigned tasks. Those skilled in the art will understand that... Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0075] It should be understood that the processor can be a Central Processing Unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among these, a general-purpose processor can be a microprocessor or any conventional processor.

[0076] In one embodiment, the processor is configured to run a computer program stored in memory to perform the following steps: Step S101: Clamp both ends of the guidewire to be tested, and when the guidewire to be tested is clamped in the test fixture, the guidewire to be tested is located in the test channel, and the test channel is provided with a simulated liquid for simulating the vascular environment; Step S102: Perform torsion and / or extension operations on the guide wire under test based on preset fatigue test parameters, so that the guide wire under test is in a fatigue state and the corresponding fatigue test information is obtained. Step S103: Apply axial tensile force to the guide wire under fatigue state until the guide wire breaks to obtain the fatigue peak tensile force of the guide wire. Step S104: Output the test results of the guide wire under test based on the fatigue test information and the fatigue peak tensile force.

[0077] In some embodiments, the test results include strength retention rate, and the step of outputting the test results of the guide wire under test based on the fatigue test information and the peak fatigue tensile force includes: Obtain the peak tensile force required to apply an axial tensile force to the guidewire under normal conditions until the guidewire breaks; The peak fatigue tensile force of the guide wire under test under different fatigue states is obtained, and the strength retention rate of the guide wire under test under different fatigue states is determined according to the ratio of the peak fatigue tensile force to the conventional peak tensile force, wherein the number of torsions and / or the number of extensions and retractions corresponding to the guide wires under test under different fatigue states are different.

[0078] In some embodiments, the test result further includes a failure threshold, and the step of outputting the test result of the guide wire under test based on the fatigue test information and the fatigue peak tensile force further includes: Based on the strength retention rate, plot the strength retention rate curve as a function of the number of torsion cycles and / or the number of expansion cycles; Integrate the strength retention rate curve to obtain the target integral value corresponding to the maximum number of torsion cycles and / or the maximum number of expansion cycles on the strength retention rate curve; A failure threshold is determined based on the target integral value. The failure threshold includes: the number of threshold torsions and / or the number of threshold expansions. The ratio of the integral threshold corresponding to the number of threshold torsions and / or the number of threshold expansions to the target integral value is a preset ratio.

[0079] In some embodiments, the fatigue test parameters include torsion parameters and / or extension parameters. The process of performing torsion and / or extension operations on the guidewire under test based on preset fatigue test parameters to subject the guidewire to a fatigue state and obtain corresponding fatigue test information includes: The guide wire under test is subjected to a torsion operation based on the torsion parameters, and / or stretched and compressed based on the extension parameters, so that the guide wire under test is in a fatigue state; wherein, the torsion parameters include: torsion angle and torsion speed, and the extension parameters include: stroke amplitude and loading frequency; The bending stiffness and torque transmission efficiency of the guide wire under fatigue state are obtained to obtain the fatigue test information.

[0080] In some embodiments, obtaining the bending stiffness and torque transmission efficiency of the guide wire under fatigue state to obtain the fatigue test information includes: The guide wire under fatigue condition is placed between two support points, and a load is applied to the guide wire to obtain the deflection of the guide wire under the load. The bending stiffness is determined based on the span between the support points, the load, and the deflection.

[0081] In some embodiments, obtaining the bending stiffness and torque transmission efficiency of the guide wire under fatigue state to obtain the fatigue test information includes: The proximal input torque and distal output torque of the guidewire under test in a fatigue state are obtained, and the first torque transmission efficiency is determined based on the ratio of the distal output torque to the proximal input torque. Based on the mapping relationship between torque transmission efficiency and guide wire length, the target torque transmission efficiency is determined according to the first torque transmission efficiency.

[0082] In some embodiments, the step of performing torsion and / or extension operations on the guidewire under test based on preset fatigue test parameters to subject the guidewire to a fatigue state and obtain corresponding fatigue test information includes: The length of the guide wire to be tested is determined based on the distance between the test fixtures; The stroke range of the telescopic operation and the torsion angle of the torsion operation are determined based on the guide wire length.

[0083] In some embodiments, determining the stroke range of the telescopic operation and the torsion angle of the torsion operation based on the guidewire length includes: The stroke range is determined based on the guidewire length using the following formula: ; Where L represents the guidewire length and A represents the stroke range. This indicates the preset length, and k is the preset S-curve parameter. It represents the frequency of a sine wave.

[0084] In some embodiments, determining the stroke range of the telescopic operation and the torsion angle of the torsion operation based on the guidewire length includes: ; Wherein, θ represents the torsion angle, L represents the guide wire length, and α represents the preset torsion constant.

[0085] It should be noted that those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the computer equipment described above can be referred to the corresponding process in the aforementioned embodiment of the guide wire tension detection method, and will not be repeated here.

[0086] This application also provides a computer-readable storage medium storing a computer program, which includes program instructions. When the program instructions are executed, the method implemented can be referred to in various embodiments of the guide wire tension detection method of this application.

[0087] The computer-readable storage medium may be an internal storage unit of the computer device described in the foregoing embodiments, such as the hard disk or memory of the computer device. The computer-readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, SmartMedia Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the computer device.

[0088] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0089] It should also be understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, herein, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0090] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above descriptions are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A guidewire tension detection system, comprising: The guide wire tension detection system comprises: a guide wire clamping module, which comprises a test clamp for clamping two ends of a guide wire to be tested, and a test pipe in which the guide wire to be tested is located when the guide wire to be tested is clamped in the test clamp, and a simulation liquid for simulating a blood vessel environment is arranged in the test pipe; a fatigue test module for performing a torsion operation and / or a stretching and compression operation on the guide wire to be tested based on preset fatigue test parameters, so that the guide wire to be tested is in a fatigue state and corresponding fatigue test information is obtained; a tension test module for applying an axial tension to the guide wire to be tested in the fatigue state until the guide wire to be tested is broken, so that a fatigue peak tension of the guide wire to be tested is obtained; a result output module for outputting a test result of the guide wire to be tested according to the fatigue test information and the fatigue peak tension.

2. The guidewire tension detection system of claim 1, wherein, The test result comprises a strength retention rate, and the output of the test result of the guide wire to be tested according to the fatigue test information and the fatigue peak tension comprises: obtaining a conventional peak tension required for applying an axial tension to the guide wire to be tested in a conventional state until the guide wire to be tested is broken; obtaining fatigue peak tensions of the guide wire to be tested in different fatigue states, and determining a strength retention rate of the guide wire to be tested in different fatigue states according to a ratio of the fatigue peak tensions to the conventional peak tension, wherein the guide wire to be tested in different fatigue states corresponds to different torsion times and / or different stretching and compression times.

3. The guidewire tension detection system of claim 2, wherein, The test result further comprises a failure threshold, and the output of the test result of the guide wire to be tested according to the fatigue test information and the fatigue peak tension further comprises: drawing a strength retention rate curve of the strength retention rate and the torsion times and / or the stretching and compression times according to the strength retention rate; integrating the strength retention rate curve to obtain a target integral value corresponding to a maximum torsion time and / or a maximum stretching and compression time on the strength retention rate curve; determining a failure threshold according to the target integral value, wherein the failure threshold comprises a threshold torsion time and / or a threshold stretching and compression time, and a ratio of an integral threshold value corresponding to the threshold torsion time and / or the threshold stretching and compression time to the target integral value is a preset proportion.

4. The guidewire tension detection system of claim 1, wherein, The fatigue test parameters comprise torsion parameters and / or stretching and compression parameters, and the torsion operation and / or the stretching and compression operation on the guide wire to be tested based on the preset fatigue test parameters so that the guide wire to be tested is in a fatigue state and corresponding fatigue test information is obtained comprises: performing a torsion operation on the guide wire to be tested based on the torsion parameters, and / or performing a stretching and compression on the guide wire to be tested based on the stretching and compression parameters, so that the guide wire to be tested is in a fatigue state; wherein the torsion parameters comprise a torsion angle and a torsion speed, and the stretching and compression parameters comprise a stroke amplitude and a loading frequency; obtaining a bending stiffness and a torque transmission efficiency of the guide wire to be tested in a fatigue state to obtain the fatigue test information.

5. The guidewire tension detection system of claim 4, wherein, The fatigue test information comprises: placing the guide wire under test in a fatigue state between two support points, and applying a load to the guide wire under test to obtain a deflection of the guide wire under test under the load; determining the bending stiffness according to a span between the support points, the load, and the deflection.

6. The guidewire tension detection system of claim 4, wherein, The fatigue test information comprises: obtaining a proximal end input torque and a distal end output torque of the guide wire under test in a fatigue state, and determining a first torque transmission efficiency according to a ratio of the distal end output torque to the proximal end input torque; determining a target torque transmission efficiency according to the first torque transmission efficiency based on a mapping relationship between torque transmission efficiency and guide wire length.

7. The guidewire tension detection system of claim 1, wherein, The fatigue test information comprises: determining a guide wire length of the guide wire under test according to a distance between the test clamps; determining a stroke amplitude of the extension and contraction operation and a torsion angle of the torsion operation according to the guide wire length.

8. The guidewire tension detection system of claim 7, wherein, The determining the stroke amplitude of the extension and contraction operation and the torsion angle of the torsion operation according to the guide wire length comprises: determining the stroke amplitude according to the guide wire length based on the following formula: ； Wherein, L represents the guide wire length, A represents the stroke amplitude, represents a preset length, k is a preset S-shaped curve parameter, represents a sine wave frequency.

9. The guidewire tension detection system of claim 7, wherein, The determining the stroke amplitude of the extension and contraction operation and the torsion angle of the torsion operation according to the guide wire length comprises: determining the torsion angle according to the guide wire length based on the following formula: ； wherein θ represents the torsion angle, L represents the guide wire length, and a represents a preset torsion constant.

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