A method for characterizing the softness of a catheter and a device for detecting the softness of a catheter

Abstract

This application relates to the technical field of medical catheter detection, and particularly to a method for characterizing the softness of a catheter and a device for detecting the softness of a catheter; the method includes the following steps: S1. Provide a guide wheel assembly, the guide wheel assembly includes, three guide wheels are relatively positioned in the first direction; also provide a pressure detection member for detecting the pressure borne by the second guide wheel in the second direction; S2. Wind the catheter to be detected around the three guide wheels; S3. Make the guide wheel assembly displace relative to the catheter to be detected from the initial position to the end position in the first direction, and form several sites S between the initial position and the end position in the first direction; when obtaining the pressure detection member at the corresponding site S, the pressure value F obtained by the pressure detection member is used to characterize the softness of the catheter to be detected through the site S and the pressure value F at the corresponding site S; the method provided by this application can intuitively characterize the softness of each position of the catheter in its length direction.

Description

Technical Field

[0001] The present application relates to the technical field of medical catheter detection, and particularly relates to a method for characterizing the softness of a catheter and a device for detecting the softness of a catheter. Background Art

[0002] For some existing medical catheters, such as intracranial catheters, etc., they are mostly hose structures. Different from traditional hoses, the softness of various parts of such medical catheters is not uniform. Instead, according to actual needs, the softness design of different positions of the catheter is different, and it is difficult to subjectively observe the softness of these different positions. Therefore, there is an urgent need to provide a method that can characterize the softness of the catheter. Summary of the Invention

[0003] In order to solve at least one technical problem mentioned in the background art, 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 object, the present application provides the following technical solutions.

[0005] On the one hand, the present application provides a method for characterizing the softness of a catheter, including the following steps:

[0006] S1. Provide a guide wheel assembly, the guide wheel assembly includes three guide wheels, the three guide wheels maintain relative positioning in the first direction. Among the three guide wheels, two of the guide wheels are arranged at intervals 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 the second direction, where the second direction is perpendicular to the first direction; also provide a pressure detection member for detecting the pressure borne by the second guide wheel in the second direction;

[0007] S2. Wind the catheter to be detected around the three guide wheels so that the second guide wheel is on the opposite side of the two first guide wheels in the second direction;

[0008] S3. Displace the guide wheel assembly relative to the catheter to be detected from the initial position to the end position in the first direction, and form a number of sites S between the initial position and the end position along the first direction; obtain the pressure value F obtained by the pressure detection member when the pressure detection member is at the corresponding site S, and characterize the softness of the catheter to be detected through the site S and the pressure value F corresponding to the site S.

[0009] As an optional implementation manner of the present application, in step S3, the method of characterizing the softness of the catheter to be detected through the site S and the pressure value F corresponding to the site S is:

[0010] Taking one of the site S and the pressure value F as the abscissa and the other as the ordinate, a site S-pressure value F curve graph is plotted, and the softness of the catheter to be detected is characterized by this curve graph.

[0011] As an alternative embodiment of the present application, the first direction is horizontal and the second direction is vertical.

[0012] As an alternative embodiment of the present application, the guide wheels can all rotate around their own axes, or the guide wheels remain fixed.

[0013] As an alternative embodiment of the present application, in step S3, the method of displacing the guide wheel assembly relative to the catheter to be detected from the initial position to the end position along the first direction is as follows:

[0014] At least fix one end of the catheter to be detected. Taking one of the fixed ends of the catheter as the fixed end, drive the guide wheel assembly to move away from the fixed end side along the first direction, so that the guide wheel assembly and the catheter to be detected perform relative displacement in the first direction;

[0015] Alternatively, keep the position of the guide wheel assembly unchanged, and draw the catheter to be detected along the first direction, so that the guide wheel assembly and the catheter to be detected perform relative displacement in the first direction.

[0016] As an alternative embodiment of the present application, all three guide wheels have a wheel groove circumferentially surrounding the guide wheel. In the working state, the catheter is embedded in the wheel groove.

[0017] As an alternative embodiment of the present application, the pressure detection member is a pressure sensor.

[0018] On the other hand, the present application also provides a device for detecting the softness of a catheter. The device includes a guide wheel assembly and a pressure detection member; the guide wheel assembly includes three guide wheels, and the three guide wheels are relatively positioned in the first direction. Among the three guide wheels, two of the guide wheels are arranged at intervals 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 the second direction, where the second direction is perpendicular to the first direction; the pressure detection member is used to detect the pressure borne by the second guide wheel in the second direction.

[0019] As an alternative embodiment of the present application, the device further includes a linear module, and the guide wheel assembly is installed on the linear module and is driven to move along the first direction by the linear module.

[0020] As an alternative embodiment of the present application, the guide wheel includes a wheel shaft and two wheel bodies axially spaced apart on the wheel shaft, and a wheel groove for the catheter to be embedded is formed by the interval between the two wheel bodies.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The method provided by the present application can intuitively characterize the softness of each position of the catheter in its length direction through the sliding of the guide wheel assembly relative to the catheter, and the operation is simple.

[0023] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become easily understood through the following description. Description of the Drawings

[0024] By referring to the accompanying drawings and reading the following detailed description, the above and other objects, features, and advantages of the exemplary embodiments of the present application will become easily understood. In the drawings, several embodiments of the present application are shown in an exemplary rather than restrictive manner, wherein:

[0025] In the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0026] Figure 1 Shows a schematic structural diagram of the present application;

[0027] Figure 2 Shows a schematic structural diagram of the guide wheel assembly of the present application;

[0028] Figure 3 Shows a partial structural diagram of Embodiment 2 of the present application;

[0029] Figure 4 Shows the curve obtained by using the method provided by the present application.

[0030] Explanation of the reference numerals in the drawings:

[0031] 1. Catheter;

[0032] 2. Guide wheel assembly; 201. Wheel body; 202. Wheel shaft; 203. Wheel groove; 21. First guide wheel; 22. Second guide wheel;

[0033] 3. Pressure sensor;

[0034] 4. Linear module; 41. Slide rail; 42. Slide block.

[0035] 51. Main wheel frame; 52. Sub-wheel frame. Detailed Embodiments

[0036] To make the objectives, features, and advantages of this application more apparent and understandable, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of this application.

[0037] Embodiment 1

[0038] Referring to Figures 1-3 As shown, in order to characterize the softness of the catheter in this embodiment, a method for characterizing the softness of the catheter is provided. This method specifically includes the following steps S1 to S3:

[0039] S1. As Figure 1 shown, a guide wheel assembly 2 is provided. The guide wheel assembly 2 includes three guide wheels. The three guide wheels maintain relative positioning in the first direction. Relative positioning can also be understood as that the three guide wheels move synchronously and in the same direction along the first direction. Or rather, the movement of the three guide wheels in the first direction is equivalent to the movement of a whole.

[0040] In addition, among the three guide wheels in this embodiment, as Figure 1 shown, two of the guide wheels are arranged at intervals 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 to say, 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 at intervals in sequence along the first direction.

[0041] Among them, as Figure 1 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 on the center line of the connection line of the two first guide wheels 21. At this time, the connection lines of the centers of the two first guide wheels 21 and the second guide wheel 22 form an isosceles triangle.

[0042] In this embodiment, the second direction is perpendicular to the first direction. For example, in some embodiments, the horizontal direction is denoted 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.

[0043] In addition, it is worth noting that the three guide wheels can be guide wheels that can rotate freely, that is, each guide wheel can rotate around its own axis; of course, the three guide wheels can also be guide wheels that cannot rotate, that is, the guide wheels are fixed and do not rotate.

[0044] In order to prevent the catheter 1 from slipping out of the guide wheel, in some embodiments, as Figure 2As shown, all three guide wheels have a wheel groove 203 that circumferentially surrounds the guide wheel. For example, each guide wheel is a spool. In the working state, the conduit 1 is inserted into the wheel groove 203, and through the restriction of the wheel groove 203, the conduit 1 is restricted from disengaging from the guide wheel in the axial direction of the guide wheel.

[0045] 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 further provided. The pressure detection member can adopt 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 exerted by the conduit 1 on it during the detection process. Specifically:

[0046] In this embodiment, as Figure 2 shown, the main function of the two first guide wheels 21 is to provide two fulcrums for the conduit 1, so that a part of the conduit 1 is erected on the two fulcrums 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 conduit 1 exerts pressure on the second guide wheel 22, and this pressure is finally detected and obtained by the pressure detection member.

[0047] For example, in this embodiment, as Figure 2 shown, the second guide wheel 22 presses down on the detection section of the conduit 1. In this way, the contact point where the detection section of the conduit 1 is in direct contact with the second guide wheel 22 will exert an upward pressure on the second guide wheel 22, and then this pressure data is measured by the pressure detection member.

[0048] That is to say, in this embodiment, what the pressure detection member detects is the pressure reflected at the contact point between the conduit 1 and the second guide wheel 22. The softness of the conduit 1 is fed back by the pressure value measured by the pressure detection member. The larger the pressure value measured by the pressure detection member, the harder the conduit 1 is at the position corresponding to this pressure value, and vice versa.

[0049] S2. In the Figure 2 shown manner, the conduit 1 to be detected is wound around the three guide wheels, so that the second guide wheel 22 is on the opposite side of the two first guide wheels 21 in the second direction; that is to say, the conduit 1 is passed between the first guide wheel 21 and the second guide wheel 22, and the conduit 1 is supported by the two first guide wheels 21, and the second guide wheel 22 presses down on the conduit 1.

[0050] S3. Displace the guide wheel assembly 2 relative to the conduit 1 to be detected from the initial position to the end position in the first direction. It should be noted that here it refers to the relative displacement between the guide wheel assembly 2 and the conduit 1. Therefore, specifically, it can be one of the following two forms to achieve the relative displacement between the guide wheel assembly 2 and the conduit 1.

[0051] Form 1: The guide wheel assembly 2 moves while the catheter 1 remains stationary. The specific method is to fix at least one end of the catheter 1 to be detected. Using one of the fixed ends of the catheter 1 as the fixed end, drive the guide wheel assembly 2 to move away from the fixed end side in the first direction, so that the guide wheel assembly 2 and the catheter 1 to be detected have a relative displacement in the first direction.

[0052] For example, in some embodiments, both ends (left and right ends) of the catheter 1 can be fixed. Taking the left end of the catheter 1 as the fixed end, then drive the guide wheel assembly 2 to move from the starting position to the ending position to the right in the first direction. The starting position and the ending position are specifically selected according to actual needs.

[0053] Form 2: The guide wheel assembly 2 remains stationary while the catheter 1 moves. The specific method is to keep the position of the guide wheel assembly 2 unchanged, and then pull the catheter 1 to be detected along the first direction, so that the guide wheel assembly 2 and the catheter 1 to be detected have a relative displacement in the first direction.

[0054] A number of position points, simply referred to as position points S, are sequentially formed between the initial position and the ending position along the first direction. Taking the displacement of the guide wheel assembly 2 along the first direction as an example, several position points are intercepted during the process of the guide wheel assembly 2 moving from the initial position to the ending position as the pressure detection points of the pressure sensor 3. For example, each position point is sequentially denoted as S1, S2, S3, S4, S5... S N , and each position point is a pressure detection point.

[0055] During the relative displacement of the guide wheel assembly 2, when the pressure detection component is at the corresponding position point S, obtain the pressure value F obtained by the pressure detection component. For example, the pressure value obtained at the position of position point S1 is denoted as pressure value F1, and the pressure value obtained at position point S2 is denoted as F2... the pressure value obtained at position point S N is denoted as F N .

[0056] Characterize the softness of the catheter 1 to be detected through the position point S and the corresponding pressure value F at the position point S. That is, through the above method, a set of data of the pressure values F corresponding to each position point S can be obtained.

[0057] In some embodiments, in order to more intuitively characterize the softness of the catheter 1, the measured position point S and pressure value F can be displayed in the form of a curve. For example, taking the position point S as the abscissa and the pressure value as the ordinate, several plane coordinate points can be obtained at this time, which are respectively (S1, F1), (S2, F2)... (S N , F N ), and connecting these coordinate points in sequence can obtain a curve as shown in Figure 4 . This curve can characterize the softness of the catheter 1.

[0058] It is understandable that the more coordinate points there are, the more accurate the obtained curve will be. Therefore, in some embodiments, the curve can be obtained by relying on computer software processing, that is, the computer collects and analyzes all the data of the positions S and pressure values F of the guide wheel assembly 2 during the entire displacement process from the initial position to the end position, so as to draw the Figure 4 curve shown.

[0059] In addition, in Figure 4 , it can be understood that the initial position is the position of the abscissa "0" point, and the other abscissas can be understood as the distance or displacement of the guide wheel assembly relative to the initial position, with the unit being mm. For example, at the position of the abscissa 10 mm in Figure 4 , it is the position (point) 10 mm away from the initial position.

[0060] Of course, in some other alternative embodiments, the position S can also be used as the ordinate and the pressure value F as the abscissa, and the curve can also be obtained in this way.

[0061] Embodiment 2

[0062] Based on the characterization method provided in Embodiment 1, this embodiment provides a device for detecting the softness of the catheter 1. The device provided in this embodiment mainly includes a guide wheel assembly 2 and a pressure detector.

[0063] Among them, as Figures 1-3 shown, the guide wheel assembly 2 includes three guide wheels. The three guide wheels maintain relative positioning in the first direction. Among the three guide wheels, two of the guide wheels are arranged at intervals in sequence in 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, where the second direction is perpendicular to the first direction; the pressure detector is used to detect the pressure borne by the second guide wheel 22 in the second direction.

[0064] For the guide wheel assembly 2 and the pressure detector here, reference can be specifically made to the description in Embodiment 1, and no repeated elaboration will be made here.

[0065] In addition, in order to enable the guide wheel assembly 2 to move linearly in the first direction, in this embodiment, the device further includes a linear module 4. The guide wheel assembly 2 is installed on the linear module 4 and is driven by the linear module 4 to move in the first direction. Taking the first direction as the horizontal direction as an example, at this time, the linear module 4 is used to drive the guide wheel assembly 2 to move horizontally.

[0066] Among them, as Figure 3As shown in the figure, the linear module 4 can adopt an existing servo lead screw linear module. This kind of module can not only drive the guide wheel assembly 2 to move linearly, but also accurately collect and obtain each position point. The servo lead screw linear module 4 mainly includes a slide rail 41, a slider 42 and a lead screw (not shown in the figure), etc. Among them, the slide rail 41 extends along the first direction, and the slider 42 is slidably connected to the slide rail 41 along the first direction. The lead screw is driven to rotate by a servo motor, and then the lead screw will drive the slider 42 to slide along the slide rail 41.

[0067] In this way, as long as the guide wheel assembly 2 is installed on the slider 42, it can be driven by the slider 42 to displace along the first direction. Specifically, as Figure 3 shown in the figure, the guide wheel assembly 2 further 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 installed on a sub-wheel frame 52, and the top of the sub-wheel frame 52 is installed on the main wheel frame 51 through a pressure sensor 3, that is, the pressure sensor 3 is installed between the main wheel frame 51 and the sub-wheel frame 52 to realize pressure detection.

[0068] In order to prevent the catheter 1 from slipping out of the guide wheel, in some embodiments, as Figure 2 shown in the figure, all three guide wheels have a wheel groove 203 that circumferentially surrounds the guide wheel. For example, each guide wheel is an I-shaped wheel; in the working state, the catheter 1 is embedded in the wheel groove 203, and through the limitation of the wheel groove 203, the guide wheel is restricted from slipping out of the guide wheel in the axial direction of the guide wheel.

[0069] As a way of forming the wheel groove 203, as Figure 2 shown in the figure, the guide wheel includes a wheel shaft 202 and two wheel bodies 201 that are axially spaced apart on the wheel shaft 202. A wheel groove 203 for the catheter 1 to be embedded is formed by the spaced arrangement between the two wheel bodies 201.

[0070] It should be understood that various forms of processes shown above can be used, reordering, adding or deleting steps. For example, the steps described in this application can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this application can be achieved. This is not limited herein.

[0071] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0072] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the said claims.

Claims

1. A method for characterizing the softness of a catheter, characterized in that, The steps are as follows: S1. Provide a guide wheel assembly, which includes three guide wheels. The three guide wheels are relatively positioned in the first direction. Among the three guide wheels, two of them are arranged at intervals in sequence in 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 wheels in the second direction, where the second direction is perpendicular to the first direction. The function of the two first guide wheels is to provide two fulcrums for the catheter, so that part of the catheter section is erected on the two fulcrums as the detection section; the second guide wheel is used to press on the detection section, so that the detection section of the catheter applies pressure to the second guide wheel; also provide a pressure detection component for detecting the pressure borne by the second guide wheel in the second direction. The pressure borne by the second guide wheel in the second direction comes from the pressure applied by the catheter to it during the detection process; S2. Wind the catheter to be detected around the three guide wheels, so that the second guide wheel is on the opposite side of the two first guide wheels in the second direction; S3. Displace the guide wheel assembly relative to the catheter to be detected from the initial position to the end position in the first direction, and several sites S are formed between the initial position and the end position in the first direction; Obtain the pressure value F obtained by the pressure detection component at the corresponding site S, and characterize the softness of the catheter to be detected through the site S and the pressure value F at the corresponding site S.

2. The method for characterizing the softness of a catheter according to claim 1, wherein In step S3, the method of characterizing the softness of the catheter to be detected through the site S and the pressure value F at the corresponding site S is as follows: Take one of the site S and the pressure value F as the abscissa and the other as the ordinate, and draw a site S - pressure value F curve graph, and characterize the softness of the catheter to be detected through this curve graph.

3. A method for characterizing the softness of a catheter according to claim 1 or 2, characterized in that, The first direction is horizontal and the second direction is vertical.

4. A method for characterizing the softness of a catheter according to claim 1 or 2, characterized in that, Each of the guide wheels can rotate around its own axis, or the guide wheels remain fixed.

5. A method for characterizing the softness of a catheter according to claim 1, characterized in that, In step S3, the method of displacing the guide wheel assembly relative to the catheter to be detected from the initial position to the end position in the first direction is as follows: Fix at least one end of the catheter to be detected. Take one of the fixed ends of the catheter as the fixed end, and drive the guide wheel assembly to move away from the fixed end side in the first direction, so that the guide wheel assembly and the catheter to be detected are relatively displaced in the first direction; Or, keep the position of the guide wheel assembly unchanged, and draw out the catheter to be detected in the first direction, so that the guide wheel assembly and the catheter to be detected are relatively displaced in the first direction.

6. A method for characterizing the softness of a catheter according to claim 1, characterized in that, Each of the three guide wheels has a wheel groove circumferentially surrounding the guide wheel. In the working state, the catheter is embedded in the wheel groove.

7. A method for characterizing the softness of a catheter according to claim 1, characterized in that The pressure detection component is a pressure sensor.

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