Catheter softness characterization method and device for detecting catheter softness

Abstract

The invention relates to the technical field of medical catheter detection, in particular to a catheter softness characterization method and a device for detecting catheter softness. Comprising the following steps that S1, a guide wheel assembly is provided, and the guide wheel assembly comprises three guide wheels which are kept relatively positioned in the first direction; the pressure detection piece is used for detecting the pressure borne by the second guide wheel in the second direction; s2, enabling a to-be-detected guide pipe to bypass the three guide wheels; s3, enabling the guide wheel assembly to move from the initial position to the final position along the first direction relative to the to-be-detected guide pipe, and forming a plurality of sites S between the initial position and the final position along the first direction; acquiring a pressure value F obtained by the pressure detection piece when the pressure detection piece is at the corresponding site S, and representing the softness of the catheter to be detected through the site S and the pressure value F of the corresponding site S; according to the method provided by the invention, the softness of each position of the catheter in the length direction can be intuitively represented.

Description

Technical Field

[0001] The present application relates to the technical field of medical catheter detection, and in particular to a catheter softness characterization method and a catheter softness detection device. Background Art

[0002] Some existing medical catheters, such as intracranial catheters, are mostly hose structures. Such medical catheters are different from traditional hoses in that the softness of the catheter is not uniform at all locations. Instead, the softness of the catheter is designed differently at different locations based on actual needs. The softness at these different locations is difficult to observe subjectively, so there is an urgent need to provide a method for characterizing the softness of the catheter. Summary of the invention

[0003] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present application is to provide a method for characterizing the softness of a catheter and a device for detecting the softness of a catheter.

[0004] To achieve the above objectives, this application provides the following technical solutions.

[0005] In one aspect, the present application provides a method for characterizing the softness of a catheter, comprising the following steps: S1. Provide a guide wheel assembly, the guide wheel assembly comprising three guide wheels, the three guide wheels are relatively positioned in a first direction, two of the three guide wheels are sequentially arranged in a spaced relationship along the first direction to form a first guide wheel, the other guide wheel forms a second guide wheel, the second guide wheel is located between the two first guide wheels and deviates from the first guide wheel in a second direction, wherein the second direction is perpendicular to the first direction; and provide a pressure detection member for detecting the pressure borne by the second guide wheel in the second direction; S2, passing the catheter to be inspected around the three guide wheels, so that the second guide wheel is located on the opposite side of the two first guide wheels in the second direction; S3. Displace the guide wheel assembly from the initial position to the end position along the first direction relative to the catheter to be tested, and form a plurality of points S along the first direction between the initial position and the end position; obtain the pressure value F obtained by the pressure detection component when the pressure detection component is at the corresponding point S, and characterize the softness of the catheter to be tested by the point S and the pressure value F corresponding to the point S.

[0006] As an optional implementation of the present application, in step S3, the method of characterizing the softness of the catheter to be tested by the site S and the pressure value F corresponding to the site S is: The site S and the pressure value F are plotted, with one of them being used as the abscissa and the other as the ordinate, to obtain a site S-pressure value F curve graph, through which the softness of the catheter to be tested is characterized.

[0007] As an optional implementation manner of the present application, the first direction is horizontal, and the second direction is vertical.

[0008] As an optional implementation of the present application, the guide wheels can rotate around their own axes, or the guide wheels remain fixed.

[0009] As an optional implementation of the present application, in step S3, the method for causing the guide wheel assembly to move relative to the catheter to be detected along the first direction from the initial position to the end position is: At least one end of the catheter to be tested is fixed, one of the fixed ends of the catheter is used as the fixed end, and the guide wheel assembly is driven to move along a first direction toward a side away from the fixed end, so that the guide wheel assembly and the catheter to be tested are relatively displaced in the first direction; Alternatively, the guide wheel assembly is kept in position, and the catheter to be tested is pulled along the first direction, so that the guide wheel assembly and the catheter to be tested are relatively displaced in the first direction.

[0010] As an optional implementation of the present application, the three guide wheels all have a wheel groove circumferentially surrounding the guide wheel, and in the working state, the guide tube is embedded in the wheel groove.

[0011] As an optional implementation of the present application, the pressure detection component is a pressure sensor.

[0012] On the other hand, the present application also provides a device for detecting the softness of a catheter, the device comprising a guide wheel assembly and a pressure detection member; the guide wheel assembly comprises three guide wheels, the three guide wheels are relatively positioned in a first direction, two of the three guide wheels are arranged in sequence along the first direction to constitute a first guide wheel, and the other guide wheel constitutes a second guide wheel, the second guide wheel is located between the two first guide wheels and deviates from the first guide wheel in a second direction, wherein the second direction is perpendicular to the first direction; the pressure detection member is a pressure detection member used to detect the pressure borne by the second guide wheel in the second direction.

[0013] As an optional implementation of the present application, the device further includes a linear module, and the guide wheel assembly is mounted on the linear module and driven by the linear module to move along the first direction.

[0014] As an optional implementation of the present application, the guide wheel includes a wheel axle and two wheel bodies axially spaced apart on the wheel axle, and the two wheel bodies are spaced apart to form a wheel groove for the guide tube to be embedded.

[0015] Compared with the prior art, this application has the following beneficial effects: The method provided in the present application can intuitively characterize the softness of the catheter at various positions along its length direction through the sliding of the guide wheel assembly relative to the catheter, and the operation is simple.

[0016] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become readily understood. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, wherein: In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0018] Figure 1 A schematic diagram of the structure of the present application is shown; Figure 2 The schematic diagram of the structure of the guide wheel assembly of the present application is shown; Figure 3 A partial structural schematic diagram of Example 2 of the present application is shown; Figure 4 The graph is obtained by using the method provided in this application.

[0019] Description of the numbers in the figure: 1. Catheter; 2. Guide wheel assembly; 201. Wheel body; 202. Wheel axle; 203. Wheel groove; 21. First guide wheel; 22. Second guide wheel; 3. Pressure sensor; 4. Linear module; 41. Slide rail; 42. Slider.

[0020] 51. Main wheel frame; 52. Auxiliary wheel frame. DETAILED DESCRIPTION

[0021] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0022] Example 1 Reference Figure 1-3 As shown, in order to characterize the softness of a catheter, this embodiment provides a method for characterizing the softness of a catheter. The method specifically includes the following steps S1 to S3: S1, such as Figure 1As shown, a guide wheel assembly 2 is provided, and the guide wheel assembly 2 includes three guide wheels. The three guide wheels maintain relative positioning in a first direction. The relative positioning can also be understood as that the three guide wheels move synchronously and in the same direction along the first direction, or in other words, the movement of the three guide wheels in the first direction is equivalent to the movement of a whole.

[0023] In addition, among the three guide wheels in this embodiment, Figure 1 As shown, two guide wheels are arranged in sequence along the first direction to form a first guide wheel 21, and the other guide wheel forms a second guide wheel 22; that is, in this embodiment, the three guide wheels include two first guide wheels 21 and one second guide wheel 22, and the two first guide wheels 21 are arranged in sequence along the first direction to form a first guide wheel 21.

[0024] Among them, Figure 1 As shown, the second guide wheel 22 is located between the two first guide wheels 21 and deviates from the first guide wheel 21 in the second direction. In some embodiments, the second guide wheel 22 is located on the center line of the line connecting the two first guide wheels 21, and the line connecting the centers of the two first guide wheels 21 and the second guide wheel 22 forms an isosceles triangle.

[0025] In this embodiment, the second direction is perpendicular to the first direction. For example, in some embodiments, the horizontal direction is recorded as the first direction, and the corresponding second direction is the vertical direction. The horizontal direction can be understood as a horizontal straight line direction, and the vertical direction is a vertical straight line direction.

[0026] In addition, it is worth mentioning that the three guide wheels can be freely rotating guide wheels, that is, each guide wheel can rotate around its own axis; of course, the three guide wheels can also be non-rotating guide wheels, that is, the guide wheels are fixed and do not rotate.

[0027] In order to prevent the catheter 1 from falling out of the guide wheel, in some embodiments, Figure 2 As shown, the three guide wheels all have a wheel groove 203 circumferentially surrounding the guide wheel, for example, each guide wheel is an I-shaped wheel; in the working state, the guide tube 1 is embedded in the wheel groove 203, and the guide tube 1 is restricted from escaping from the guide wheel in the axial direction of the guide wheel through the restriction of the wheel groove 203.

[0028] In addition, in step S1, a pressure detection member for detecting the pressure borne by the second guide wheel 22 in the second direction is provided, and the pressure detection member can be a pressure sensor 3. It can be understood that the pressure borne by the second guide wheel 22 in the second direction mainly comes from the pressure applied to it by the catheter 1 during the detection process, specifically: In this embodiment, if Figure 2As shown, the two first guide wheels 21 mainly function to provide two fulcrums for the catheter 1, so that a part of the catheter 1 is erected on the two fulcrums to serve as a detection section; and the second guide wheel 22 is used to press on the detection section, so that the detection section of the catheter 1 applies pressure to the second guide wheel 22, and the pressure is finally detected and obtained by the pressure detection component.

[0029] For example, in this embodiment, Figure 2 As shown, the second guide wheel 22 presses the detection section of the catheter 1 downward, so that the contact point where the detection section of the catheter 1 directly contacts the second guide wheel 22 will apply upward pressure to the second guide wheel 22, and then the pressure data is measured by the pressure detection component.

[0030] That is to say, in this embodiment, the pressure detection element detects the pressure reflected at the contact point between the catheter 1 and the second guide wheel 22. The softness of the catheter 1 is fed back through the pressure value measured by the pressure detection element. The larger the pressure value measured by the pressure detection element, the harder the catheter 1 is at the position corresponding to the pressure value, and vice versa.

[0031] S2, Figure 2 In the manner shown, the catheter 1 to be inspected is passed around the three guide wheels so that the second guide wheel 22 is located on the opposite side of the two first guide wheels 21 in the second direction; that is, the catheter 1 is passed between the first guide wheel 21 and the second guide wheel 22, the catheter 1 is supported by the two first guide wheels 21, and the second guide wheel 22 presses the catheter 1 downward.

[0032] S3. The guide wheel assembly 2 is displaced from the initial position to the end position along the first direction relative to the catheter 1 to be detected. It is worth noting that this refers to the relative displacement of the guide wheel assembly 2 and the catheter 1. Therefore, it can be specifically one of the following two forms to achieve the relative displacement of the guide wheel assembly 2 and the catheter 1.

[0033] Form 1: The guide wheel assembly 2 moves and the catheter 1 does not move: The specific method is to fix at least one end of the catheter 1 to be detected, take one of the fixed ends of the catheter 1 as the fixed end, and drive the guide wheel assembly 2 to move along the first direction away from the fixed end, so that the guide wheel assembly 2 and the catheter 1 to be detected are relatively displaced in the first direction.

[0034] For example, in some embodiments, both ends (left and right ends) of the catheter 1 can be fixed, with the left end of the catheter 1 as the fixed end, and then the guide wheel assembly 2 is driven to move rightward from the starting position to the end position along the first direction. The starting position and the end position here are specifically selected according to actual needs.

[0035] Form 2: The guide wheel assembly 2 is stationary and the catheter 1 moves: The specific method is to keep the guide wheel assembly 2 stationary, and then pull the catheter 1 to be tested along the first direction to make the guide wheel assembly 2 and the catheter 1 to be tested relatively displaced in the first direction.

[0036] A plurality of position points are formed in sequence between the initial position and the terminal position along the first direction, referred to as position points S for short; taking the displacement of the guide wheel assembly 2 along the first direction as an example, a plurality of position points are intercepted during the movement of the guide wheel assembly 2 from the initial position to the terminal position as pressure detection points of the pressure sensor 3; for example, the position points are respectively recorded as S1, S2, S3, S4, S5...S N , each position point is a pressure detection point.

[0037] During the relative displacement of the guide wheel assembly 2, the pressure value F obtained by the pressure detection member at the corresponding position S is obtained. For example, the pressure value obtained at the position S1 is recorded as pressure value F1, and the pressure value obtained at the position S2 is recorded as F2... N The pressure value obtained is recorded as F N .

[0038] The softness of the catheter 1 to be tested is characterized by the site S and the pressure value F corresponding to the site S. That is, a set of data of the pressure value F corresponding to each site S can be obtained by the above method.

[0039] In some embodiments, in order to more intuitively characterize the softness of the catheter 1, the measured position S and pressure value F can be displayed in the form of a curve. For example, the position S is used as the horizontal coordinate and the pressure value is used as the vertical coordinate. At this time, several plane coordinate points can be obtained, namely (S1, F1), (S2, F2)... (S N , F N ), by connecting these coordinate points in sequence, we can get a line like Figure 4 The curve shown can characterize the softness of the catheter 1.

[0040] It is also understandable that the more coordinate points there are, the more accurate the curve obtained. Therefore, in some embodiments, the curve can be obtained by computer software processing, that is, the computer collects and analyzes the data of all the positions S and the pressure values ​​F during the entire displacement process of the guide wheel assembly 2 from the initial position to the terminal position to draw a curve. Figure 4 The curve shown.

[0041] In addition, Figure 4 In the diagram, it can be understood that the initial position is the horizontal coordinate "0" point position, and the other horizontal coordinates can be understood as the distance of the guide wheel assembly compared to the initial position, or the displacement, in mm. Figure 4The 10mm position on the middle horizontal coordinate is the position (site) 10mm away from the initial position.

[0042] Of course, in some other optional implementations, the position S can be used as the ordinate and the pressure value F can be used as the abscissa. This method can also obtain a curve.

[0043] Example 2 This embodiment provides a device for detecting the softness of a catheter 1 based on the characterization method provided in Embodiment 1. The device provided in this embodiment mainly includes a guide wheel assembly 2 and a pressure detection component.

[0044] Among them, Figure 1-3 As shown, the guide wheel assembly 2 includes three guide wheels, and the three guide wheels are relatively positioned in the first direction. Among the three guide wheels, two guide wheels are arranged in sequence along the first direction to form a first guide wheel 21, and the other guide wheel forms a second guide wheel 22. The second guide wheel 22 is located between the two first guide wheels 21 and deviates from the first guide wheel 21 in the second direction, wherein the second direction is perpendicular to the first direction; the pressure detection component is a pressure detection component for detecting the pressure borne by the second guide wheel 22 in the second direction.

[0045] The guide wheel assembly 2 and the pressure detection component here can be specifically referred to the description of Example 1, and will not be repeated here.

[0046] In addition, in order to enable the guide wheel assembly 2 to move linearly along the first direction, in this embodiment, the device also includes a linear module 4, and the guide wheel assembly 2 is installed on the linear module 4, and is driven by the linear module 4 to move along the first direction. Taking the first direction as the horizontal direction as an example, the linear module 4 is used to drive the guide wheel assembly 2 to move horizontally.

[0047] Among them, Figure 3 As shown, the linear module 4 can adopt the existing servo screw linear module, which can not only drive the guide wheel assembly 2 to move linearly, but also accurately collect and obtain each position. The servo screw linear module 4 mainly includes a slide rail 41, a slider 42 and a screw (not shown in the figure), wherein the slide rail 41 extends along a first direction, and the slider 42 is connected to the slide rail 41 by sliding along the first direction. The screw is driven to rotate by the servo motor, and then the screw drives the slider 42 to slide along the slide rail 41.

[0048] In this way, as long as the guide wheel assembly 2 is installed on the slider 42, the slider 42 can drive the guide wheel assembly 2 to move in the first direction. Figure 3As shown, the guide wheel assembly 2 also includes a main wheel frame 51, and the first guide wheel 21 is rotatably connected to the main wheel frame 51; the second guide wheel 22 is rotatably mounted on a secondary wheel frame 52, and the top of the secondary wheel frame 52 is mounted on the main wheel frame 51 through the pressure sensor 3, that is, the pressure sensor 3 is installed between the main wheel frame 51 and the secondary wheel frame 52 to realize pressure detection.

[0049] In order to prevent the catheter 1 from falling out of the guide wheel, in some embodiments, Figure 2 As shown, the three guide wheels all have a wheel groove 203 circumferentially surrounding the guide wheel, for example, each guide wheel is an I-shaped wheel; in the working state, the guide tube 1 is embedded in the wheel groove 203, and the wheel groove 203 is limited to limit the guide wheel from escaping from the guide wheel in the axial direction of the guide wheel.

[0050] As a method of forming the wheel groove 203, Figure 2 As shown, the guide wheel includes a wheel axle 202 and two wheel bodies 201 axially spaced apart on the wheel axle 202 , and the two wheel bodies 201 are spaced apart to form a wheel groove 203 for the guide tube 1 to be embedded.

[0051] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution disclosed in this application can be achieved, and this document is not limited here.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for characterizing catheter softness, characterized in that: The steps include: S1. Provide a guide wheel assembly, the guide wheel assembly comprising three guide wheels, the three guide wheels are relatively positioned in a first direction, two of the three guide wheels are sequentially arranged in a spaced relationship along the first direction to form a first guide wheel, the other guide wheel forms a second guide wheel, the second guide wheel is located between the two first guide wheels and deviates from the first guide wheel in a second direction, wherein the second direction is perpendicular to the first direction; A pressure detection member for detecting the pressure borne by the second guide wheel in the second direction is also provided; S2, passing the catheter to be inspected around the three guide wheels, so that the second guide wheel is located on the opposite side of the two first guide wheels in the second direction; S3, displacing the guide wheel assembly from an initial position to an end position along a first direction relative to the catheter to be inspected, and forming a plurality of points S between the initial position and the end position along the first direction; The pressure value F obtained by the pressure detection element when the pressure detection element is at the corresponding position S is obtained, and the position S and the pressure value F corresponding to the position S are used to characterize the softness of the catheter to be detected.

2. A catheter flexibility characterization method according to claim 1, characterized in that: In step S3, the method of characterizing the softness of the catheter to be tested by using the site S and the pressure value F corresponding to the site S is: The site S and the pressure value F are plotted, with one of them being used as the abscissa and the other as the ordinate, to obtain a site S-pressure value F curve graph, through which the softness of the catheter to be tested is characterized.

3. A catheter flexibility characterization method according to claim 1 or 2, characterized in that: The first direction is horizontal, and the second direction is vertical.

4. A catheter flexibility characterization method according to claim 1 or 2, characterized in that: The guide wheels can rotate around their own axes, or the guide wheels remain fixed.

5. A catheter flexibility characterization method according to claim 1, characterized in that: In step S3, the method for causing the guide wheel assembly to move relative to the catheter to be inspected along the first direction from the initial position to the end position is: At least one end of the catheter to be tested is fixed, one of the fixed ends of the catheter is used as the fixed end, and the guide wheel assembly is driven to move along a first direction toward a side away from the fixed end, so that the guide wheel assembly and the catheter to be tested are relatively displaced in the first direction; Alternatively, the guide wheel assembly is kept in position, and the catheter to be tested is pulled along the first direction, so that the guide wheel assembly and the catheter to be tested are relatively displaced in the first direction.

6. A catheter flexibility characterization method according to claim 1, characterized in that: The three guide wheels are all provided with a wheel groove circumferentially surrounding the guide wheel, and in a working state, the guide tube is embedded in the wheel groove.

7. A catheter flexibility characterization method according to claim 1, characterized in that: The pressure detection component is a pressure sensor.

8. A device for detecting the softness of a catheter, characterized in that: The device includes a guide wheel assembly and a pressure detection component; the guide wheel assembly includes three guide wheels, and the three guide wheels are relatively positioned in a first direction. Among the three guide wheels, two guide wheels are arranged in sequence along the first direction to form a first guide wheel, and the other guide wheel forms a second guide wheel. The second guide wheel is located between the two first guide wheels and deviates from the first guide wheel in a second direction, wherein the second direction is perpendicular to the first direction; the pressure detection component is a pressure detection component used to detect the pressure borne by the second guide wheel in the second direction.

9. The device for detecting the flexibility of a catheter according to claim 8, characterized in that: The device also includes a linear module, and the guide wheel assembly is installed on the linear module and is driven by the linear module to move along the first direction.

10. The device for detecting the flexibility of a catheter according to claim 8, characterized in that: The guide wheel comprises a wheel axle and two wheel bodies which are arranged on the wheel axle at intervals along the axial direction, and the two wheel bodies are arranged at intervals to form a wheel groove for the guide tube to be embedded.

Images