Device for testing needle withdrawing length and angle of puncture needle of steam ablation catheter

Abstract

The utility model relates to the technical field of medical instruments, and provides a steam ablation catheter puncture needle withdrawing length and angle testing device which comprises a device body, a testing groove matched with and attached to the head end of a steam ablation catheter is formed in one side of the device body, and a needle outlet allowing a puncture needle at the head end of the steam ablation catheter to penetrate out is formed in the testing groove. The observation window is formed on one side of the device main body, and the observation window is communicated with the test groove through the needle outlet; the test mark extends from the needle outlet to the observation window, the two sides of the test mark are obliquely arranged along the two sides of the extension direction of the needle outlet respectively, and the test mark is provided with a standard scale mark which is a preset distance away from the needle outlet. According to the testing device, by designing the special testing groove and the needle outlet, a tester of the device can quickly observe the needle outlet length and angle of the puncture needle through the testing identifier in the observation window, whether the length and angle of the needle outlet part of the puncture needle meet requirements or not is quickly judged, and errors caused by manual judgment of a conventional testing method are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a device for testing the needle - extending length and angle of a puncture needle of a steam ablation catheter. Background Art

[0002] In medical intervention technology, as an important treatment tool, the steam ablation catheter is widely used in multiple fields such as cardiac electrophysiology treatment and tumor ablation. One of its core functions is to accurately pierce the target tissue through the puncture needle built in it to achieve the treatment effect by transmitting heat energy or other treatment means. Therefore, the needle - extending length and angle of the puncture needle, as key parameters directly affecting the treatment accuracy and safety, the testing of their accuracy and reliability is particularly important.

[0003] However, for existing steam ablation catheter products, especially the design of the head end part of its sheath, due to functional requirements, it often presents an irregular appearance, which brings many challenges to the testing of the needle - extending length and angle of the puncture needle. Specifically, because there are no obvious geometric features (such as reference points, reference lines, reference planes) at the head end of the sheath as testing benchmarks, traditional measuring tools and methods (such as vernier calipers and protractors) are difficult to accurately position and measure in actual operation, resulting in the test results being easily interfered by human factors and having large uncertainties and errors. Summary of the Utility Model

[0004] The utility model provides a device for testing the needle - extending length and angle of a puncture needle of a steam ablation catheter to solve the problems in the prior art that it is difficult to accurately position and measure the needle - extending length and angle of the puncture needle of the steam ablation catheter, resulting in the test results being easily interfered by human factors and having large uncertainties and errors.

[0005] The utility model provides a device for testing the needle - extending length and angle of a puncture needle of a steam ablation catheter, including:

[0006] A device main body, on one side of which there is a test slot adapted to fit the head end of the steam ablation catheter, and an exit port for the puncture needle on the head end of the steam ablation catheter to pass through is provided on the test slot;

[0007] An observation window is formed on one side of the device main body, and the observation window is communicated with the test slot through the exit port;

[0008] A test mark extends from the exit port towards the observation window, both sides of the test mark are inclined along both sides of the extending direction of the exit port, and standard scale lines are provided on the test mark at a preset distance from the exit port.

[0009] A test device for the needle - extending length and angle of a puncture needle of a steam ablation catheter provided by the present utility model, the left and right sides of the test mark are inclined at a preset angle with respect to the extending direction of the needle outlet.

[0010] A test device for the needle - extending length and angle of a puncture needle of a steam ablation catheter provided by the present utility model, the preset angle is ±10 degrees.

[0011] A test device for the needle - extending length and angle of a puncture needle of a steam ablation catheter provided by the present utility model, the standard scale lines include:

[0012] The first standard scale line, perpendicular to the extending direction of the needle outlet, formed on the test mark, at a first preset distance from the needle outlet;

[0013] The second standard scale line, perpendicular to the extending direction of the needle outlet, formed on the test mark, at a second preset distance from the needle outlet;

[0014] Wherein, the first preset distance is greater than the second preset distance.

[0015] A test device for the needle - extending length and angle of a puncture needle of a steam ablation catheter provided by the present utility model, the first standard scale line is parallel to the second standard scale line.

[0016] A test device for the needle - extending length and angle of a puncture needle of a steam ablation catheter provided by the present utility model, a groove is formed on the test mark, and the first standard scale line and the second standard scale line are respectively formed on both sides of the groove.

[0017] A test device for the needle - extending length and angle of a puncture needle of a steam ablation catheter provided by the present utility model, the shape of the test slot is adapted to the outer shape of one side of the head end of the steam ablation catheter to accommodate the head end of the steam ablation catheter.

[0018] A test device for the needle - extending length and angle of a puncture needle of a steam ablation catheter provided by the present utility model, an opening for inserting the head end of the steam ablation catheter is provided on the outside of the test slot, and a notch for the corresponding tail of the head end of the steam ablation catheter to pass through is provided on one side of the test slot.

[0019] A test device for the needle - extending length and angle of a puncture needle of a steam ablation catheter provided by the present utility model, the device body is an aluminum alloy shell.

[0020] A test device for the needle - extending length and angle of a puncture needle of a steam ablation catheter provided by the present utility model, the test mark is one of a fan - shaped mark, a triangular mark or a trapezoidal mark.

[0021] The steam ablation catheter puncture needle needle - out length and angle testing device provided by the present utility model can ensure the stability and accuracy of the head end of the steam ablation catheter and its puncture needle during the testing process by designing a special testing groove and a needle - out port. The adaptively - fitted design of the testing groove reduces the deviation during the testing process, and the precise position of the needle - out port ensures the accurate measurement of the needle - out length of the puncture needle. The observation window provided on the device body is connected to the needle - out port, enabling the tester to quickly observe the needle - out length and angle of the puncture needle through the test marks in the observation window, quickly judge whether the length and angle of the needle - out part of the puncture needle meet the requirements, and at the same time avoid the errors caused by the artificial judgment of the conventional testing method and reduce the probability of misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 is one of the schematic diagrams of the head end of the steam ablation catheter provided by the present utility model.

[0024] Figure 2 is the second schematic diagram of the head end of the steam ablation catheter provided by the present utility model.

[0025] Figure 3 is the side view of the steam ablation catheter puncture needle needle - out length and angle testing device provided by the present utility model.

[0026] Figure 4 is the three - dimensional structure schematic diagram of the steam ablation catheter puncture needle needle - out length and angle testing device provided by the present utility model.

[0027] Figure 5 is the first front view of the steam ablation catheter puncture needle needle - out length and angle testing device provided by the present utility model.

[0028] Figure 6 is the second front view of the steam ablation catheter puncture needle needle - out length and angle testing device provided by the present utility model.

[0029] Figure 7 is the first schematic diagram of the steam ablation catheter puncture needle needle - out length and angle testing device during actual testing provided by the present utility model.

[0030] Figure 8 is the second schematic diagram of the steam ablation catheter puncture needle needle - out length and angle testing device during actual testing provided by the present utility model.

[0031] Reference numerals:

[0032] 100, apparatus main body; 110, test tank; 120, needle outlet; 200, distal end of steam ablation catheter; 210, puncture needle; 300, observation window; 400, test mark; 410, first standard scale line; 420, second standard scale line. Detailed implementation manners

[0033] The following further describes the implementation manners of the present application in detail in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0034] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or a detachable connection, where the fixed connection can include an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0036] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0037] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0038] As Figure 1 and Figure 2 shown, a puncture needle 210 is provided in the distal end 200 of the existing steam ablation catheter. When it is necessary to measure the needle extending length of the puncture needle 210, the structure of the distal end 200 of the steam ablation catheter is complex. When measuring the needle extending length of the puncture needle 210, due to the lack of a clear initial reference point and the irregularity of the distal end of the sheath, it is very difficult to accurately find the root of the puncture needle 210 extending out as the starting point for measurement, thus affecting the accuracy of the length. And when it is necessary to measure the needle extending angle of the puncture needle 210, due to the lack of a clear reference line and reference plane, the measurement of the angle often depends on the subjective judgment of the operator, resulting in inconsistent results and being difficult to reproduce. Moreover, when the puncture needle 210 extends out, it is bent under force, and the extending part of the puncture needle 210 is not a straight line nor a curve with a certain pattern, which poses an obstacle to the length test and angle test.

[0039] To solve the above problems, an embodiment of the present utility model provides a device for testing the needle extending length and angle of a puncture needle of a steam ablation catheter. As Figures 3 to 8 shown, the device for testing the needle extending length and angle of a puncture needle of a steam ablation catheter includes: a device main body 100, an observation window 300, and a test mark 400. A test groove 110 adapted to fit the distal end 200 of the steam ablation catheter is formed on one side of the device main body 100, and a needle outlet 120 through which the puncture needle 210 on the distal end 200 of the steam ablation catheter passes through is provided on the test groove 110; the observation window 300 is formed on one side of the device main body 100, and the observation window 300 communicates with the test groove 110 through the needle outlet 120; the test mark 400 extends from the needle outlet 120 towards the observation window 300, and both sides of the test mark 400 are inclined along both sides of the extending direction of the needle outlet 120, and standard scale lines at a preset distance from the needle outlet 120 are provided on the test mark 400.

[0040] In this embodiment, the device main body 100 serves as the basis of the entire testing device. The device main body 100 not only needs to have sufficient strength and stability, but also needs to be designed with a test slot 110 that perfectly fits the tip 200 of the steam ablation catheter. The test slot 110 is located on one side of the device main body 100, and its shape and size need to be customized according to the actual size of the tip 200 of the steam ablation catheter.

[0041] The length of the test slot 110 is greater than or equal to the length of the tip 200 of the steam ablation catheter. A smooth transition surface is provided inside the test slot 110 to reduce the wear on the catheter or the puncture needle 210. An needle outlet 120 is provided on the test slot 110 for guiding the puncture needle 210 to penetrate and serving as a reference point for measuring the needle penetration length.

[0042] The needle outlet 120 is an opening on the test slot 110, and its position and size need to be adjusted according to the specifications of the tip 200 of the steam ablation catheter to ensure that the puncture needle 210 can penetrate smoothly and stably. The edge of the needle outlet 120 is smoothed to avoid unnecessary damage during the puncture process. The observation window 300 is located on one side of the device main body 100 and is connected to the test slot 110 and the needle outlet 120. The observation window 300 is used for the operator to clearly observe the entire process of the puncture needle 210 penetrating the test slot 110, including the changes in the needle penetration length and the needle penetration angle. The test mark 400 is the main tool for testing on the testing device. The test mark 400 extends along the needle outlet 120 towards the observation window 300 and is inclined on both sides along the extension direction, so that the test mark 400 can intuitively reflect the angle change of the puncture needle 210 during the penetration process. Standard scale lines are also provided on the test mark 400 at a preset distance from the needle outlet 120 for accurately measuring the needle penetration length of the puncture needle 210.

[0043] During the test, the tip 200 of the steam ablation catheter is placed and positioned so that the tip 200 of the steam ablation catheter is set in the test slot 110, and at the same time, the puncture needle 210 on the tip 200 of the steam ablation catheter correspondingly passes through the needle outlet 120, and a part of the puncture needle 210 is set in the observation window 300. By observing the relationship between the puncture needle 210 and the test mark 400 in the observation window 300, the needle penetration length and angle of the puncture needle 210 can be confirmed.

[0044] According to the positional relationship between the tip of the puncture needle 210 and the standard scale line, it can be confirmed whether the needle penetration length of the puncture needle 210 meets the requirements.

[0045] For example, if the length of the tip of the puncture needle 210 is higher than the standard scale line, it means that the puncture needle 210 is too long. If the tip of the puncture needle 210 is less than the standard scale line, it means that the puncture needle 210 is too short.

[0046] According to whether the puncture needle 210 is within the range of the test mark 400, it can be confirmed whether the angle of the puncture needle 210 meets the regulations.

[0047] For example, if a part of the puncture needle 210 does not coincide with the test mark 400, it indicates that the angle of the puncture needle 210 is not within the specified range. If the puncture needle 210 coincides with the test mark 400, it indicates that the angle of the puncture needle 210 is within the specified range.

[0048] The steam ablation catheter puncture needle needle length and angle testing device provided by the present utility model can ensure the stability and accuracy of the steam ablation catheter head end 200 and its puncture needle 210 during the test by designing a special test slot 110 and a needle outlet 120. The adapted and fitted design of the test slot 110 reduces the deviation during the test, and the precise position of the needle outlet 120 ensures the accurate measurement of the needle length of the puncture needle 210. The observation window 300 provided on the device main body 100 is connected to the needle outlet 120, enabling the tester to quickly observe the needle length and angle of the puncture needle 210 through the test mark 400 in the observation window 300, quickly judge whether the length and angle of the needle part of the puncture needle 210 meet the requirements (the test can be completed in about 5 seconds), and at the same time can avoid the error of manual judgment in the conventional test method and reduce the probability of misjudgment.

[0049] In some embodiments, as Figures 4 to 8 shown, the left and right sides of the test mark 400 are inclined at a preset angle with respect to the extending direction of the needle outlet 120.

[0050] In this embodiment, the needle outlet 120 is provided on the upper side of the test slot 110, and the width of the needle outlet 120 is slightly larger than the outer diameter of the puncture needle 210. Taking the central position of the puncture needle 210 outlet as the perpendicular line (the perpendicular direction is the extending direction of the needle outlet 120), a fan-shaped surface with a 2α-degree angle is made with the left and right angles with the perpendicular line being α degrees respectively. The fan-shaped surface is the left and right sides of the test mark 400 and is used to test whether the needle outlet angle of the puncture needle 210 is within the range of 90 degrees ± α degrees.

[0051] Specifically, the left and right sides of the test mark 400 are inclined at a preset angle α with respect to the extending direction of the needle outlet 120 (i.e., the perpendicular direction). The two sides of the test mark 400 present a fan-shaped surface shape, and its fan-shaped angle is 2α degrees. The central axis of the fan-shaped surface is the central perpendicular line of the needle outlet 120. Through the position corresponding to the fan-shaped surface and the puncture needle 210, the tester can directly judge whether the needle outlet angle of the puncture needle 210 is within the expected range (i.e., 90 degrees ± α degrees) by observing the relative position of the tip of the puncture needle 210 and the test mark 400.

[0052] In actual testing, when the puncture needle 210 penetrates through the tip of the steam ablation catheter 200 and passes through the needle outlet 120, its tip will fall on the fan surface of the test mark 400. At this time, the tester can quickly judge whether the needle outlet angle of the puncture needle 210 meets the requirements by observing the relative position of the tip of the puncture needle 210 and the edge of the fan surface. If the tip of the puncture needle 210 falls within the fan surface range (i.e., the angle with the central vertical line is within 90 degrees ± α degrees), it indicates that the needle outlet angle is qualified; if it exceeds the range, adjustment is required or the reason needs to be further analyzed.

[0053] Generally, the preset angle is ±10 degrees. The preset angle of ±10 degrees provides a certain degree of accuracy and tolerance range for the test. It allows the puncture needle 210 to have a certain angle deviation when the needle exits, but it can still be considered qualified as long as this deviation is within the range of ±10 degrees. For the tester, the fan surface width of ±10 degrees is moderate, neither too narrow to make it difficult to judge nor too wide to lose the meaning of the test. Such a design enables the tester to more easily judge whether the needle outlet angle of the puncture needle 210 meets the requirements by visual inspection.

[0054] In addition, in the field of medical devices, different steam ablation catheters and puncture needles 210 may have different specifications and performance characteristics. Setting the preset angle to ±10 degrees can take into account the test requirements of most products and improve the versatility and compatibility of the test device.

[0055] In some embodiments, as Figures 6 to 8 shown, the standard scale lines include: a first standard scale line 410 and a second standard scale line. 420 The first standard scale line 410 extends perpendicular to the extension direction of the needle outlet 120, is formed on the test mark 400, and is at a first preset distance from the needle outlet 120; the second standard scale line, which extends perpendicular to the extension direction of the needle outlet 120, is formed on the test mark 400, and is at a second preset distance from the needle outlet 120; wherein, the first standard scale line 410 is parallel to the second standard scale line, and the first preset distance is greater than the second preset distance, that is, the first standard scale line 410 reflects the upper limit of the length of the puncture needle 210, while the second standard scale line reflects the lower limit of the length of the puncture needle 210.

[0056] In this embodiment, the point where the perpendicular line of the center position of the needle outlet 120 geometrically coincides with the tip of the steam ablation catheter 200 is used as the starting point for measuring the length of the puncture needle 210. Along the perpendicular line direction, two scale lines are made extending to the standard needle length of the puncture needle 210 in the fan-shaped area, which are used as the lower limit and the upper limit for measuring the needle length of the puncture needle 210. If the tip of the puncture needle 210 is between the first standard scale line 410 and the second standard scale line, then the length of the puncture needle 210 meets the requirements; if the tip of the puncture needle 210 is not between the first standard scale line 410 and the second standard scale line, then the needle length of the puncture needle 210 does not meet the requirements.

[0057] For example, the length of the first preset distance from the first standard scale line 410 to the needle outlet 120 is D1, and the length of the second preset distance from the second standard scale line to the needle outlet 120 is D2. As long as the length of the puncture needle 210 is between D1 and D2, the length requirement is met.

[0058] In some embodiments, such as Figures 6 to 8 shown, for easy observation, a groove is formed on the test mark 400, and the first standard scale line 410 and the second standard scale line are respectively formed on both sides of the groove. 420

[0059] In this embodiment, the presence of the groove increases the three-dimensional sense and depth sense of the surface of the test mark 400, making the scale lines more prominent and easy to identify. This improvement in contrast helps the tester to read the scale value more accurately and reduces the possibility of misjudgment. The groove itself can serve as a reference benchmark to help the tester quickly locate the relative position of the tip of the puncture needle 210 and the scale line. Especially in an environment with insufficient light or unclear vision, the guiding role of the groove is particularly obvious. The groove can also play a certain role in protecting the scale line, preventing it from being worn or scratched during use. This helps to extend the service life of the test device and ensure the clarity and accuracy of the scale line.

[0060] During the test, the tester only needs to extend the puncture needle 210 from the steam ablation catheter and observe whether its tip is between the first standard scale line 410 and the second standard scale line on both sides of the groove. If the tip is within this range, it means that the length of the puncture needle 210 meets the requirements; if the tip exceeds or does not reach this range, corresponding adjustments need to be made or the reasons need to be further analyzed.

[0061] In one example, such as Figure 7 and Figure 8As shown, the shape of the test slot 110 is adapted to the outer shape of one side of the distal end 200 of the steam ablation catheter to accommodate the distal end 200 of the steam ablation catheter. The adapted shape not only helps with positioning but also provides a stable support for the distal end 200 of the steam ablation catheter. During the test, the stable support can reduce measurement errors caused by catheter shaking or deviation.

[0062] Generally, the shape of the test slot 110 is half of the distal end 200 of the steam ablation catheter, ensuring that half of the distal end 200 of the steam ablation catheter can be placed in the test slot 110. Ensure that the upper surface of the test device coincides with the central symmetry plane of the distal end 200 of the steam ablation catheter, so as to better display the plane for the puncture needle 210 length test and angle test for convenient observation.

[0063] In addition, an opening for inserting the distal end 200 of the steam ablation catheter is provided on the outside of the test slot 110, and a notch for the corresponding tail of the distal end 200 of the steam ablation catheter to pass through is provided on one side of the test slot 110. The opening on the outside of the test slot 110 is a channel for inserting the distal end 200 of the steam ablation catheter. The design of this opening should ensure that the distal end of the catheter can smoothly enter the test slot 110 and maintain a stable position during the test. The size and shape of the opening should match the outer contour of the distal end of the catheter to reduce the resistance during insertion and avoid unnecessary wear. On one side of the test slot 110, there is also a notch for the corresponding tail of the distal end 200 of the steam ablation catheter to pass through. The design of this notch is to facilitate the placement of the test slot 110 for the distal end of the catheter. By allowing the tail of the catheter to pass through the notch and connect to the other side of the test slot 110 or an external fixing device, it can ensure that the distal end of the catheter can be placed better.

[0064] In some embodiments, as Figures 2 to 8 shown, the device body 100 is an aluminum alloy housing. Using aluminum alloy material to make the test device, after surface treatment of the aluminum alloy, it will not cause appearance damage to the distal end 200 of the steam ablation catheter and the needle - protruding part of the puncture needle 210. The aluminum alloy material is stable and not easily worn, which can ensure the long - term effectiveness of the test device.

[0065] Aluminum alloy, as a high - quality metal material, has extremely high stability. During long - term use, the aluminum alloy housing is not easily deformed or corroded, and can maintain the accuracy and reliability of the test device. The aluminum alloy material has good wear resistance. The test device can still maintain its performance under frequent use and high - intensity test environments. Wear resistance not only extends the service life of the test device but also reduces the maintenance and replacement costs brought by equipment damage.

[0066] As needed, the test identifier 400 can be selected from a sector identifier, a triangle identifier, or a trapezoid identifier. With its unique sector structure, the sector identifier can clearly show the length changes of the puncture needle 210 at different angles. The scale lines on the sector identifier can be distributed along the arc of the sector, enabling the tester to visually read the length information of the puncture needle 210 at different angles. The triangle identifier makes the test identifier 400 more prominent visually and helps the tester quickly locate the position of the puncture needle 210. The trapezoid identifier can facilitate the setting of two parallel scale lines to meet different test requirements.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the present invention in each embodiment.

Claims

1. A test device for the needle - out length and angle of a steam ablation catheter puncture needle, characterized in that, Comprising: A device main body (100) with a test groove (110) formed on one side for fitting the head end (200) of a steam ablation catheter. An outlet port (120) for a puncture needle (210) on the head end (200) of the steam ablation catheter to pass through is provided on the test groove (110); An observation window (300) formed on one side of the device main body (100). The observation window (300) communicates with the test groove (110) through the outlet port (120); A test mark (400) extending from the outlet port (120) towards the observation window (300). Both sides of the test mark (400) are inclined along both sides of the extending direction of the outlet port (120). Standard scale lines are provided on the test mark (400) at a preset distance from the outlet port (120).

2. The steam ablation catheter puncture needle needle length and angle testing device according to claim 1, characterized in that, The left and right sides of the test mark (400) are inclined at a preset angle with respect to the extending direction of the outlet port (120).

3. The steam ablation catheter puncture needle needle length and angle testing device according to claim 2, characterized in that, The preset angle is ±10 degrees.

4. The steam ablation catheter puncture needle needle length and angle testing device according to claim 1, characterized in that The standard scale lines include: A first standard scale line (410) perpendicular to the extending direction of the outlet port (120), formed on the test mark (400) at a first preset distance from the outlet port (120); A second standard scale line (420) perpendicular to the extending direction of the outlet port (120), formed on the test mark (400) at a second preset distance from the outlet port (120); Wherein, the first preset distance is greater than the second preset distance.

5. The steam ablation catheter puncture needle needle - out length and angle testing device according to claim 4, characterized in that The first standard scale line (410) is parallel to the second standard scale line (420).

6. The steam ablation catheter puncture needle needle - out length and angle testing device according to claim 4, characterized in that, A groove is formed on the test mark (400), and the first standard scale line (410) and the second standard scale line (420) are respectively formed on both sides of the groove.

7. The steam ablation catheter puncture needle needle length and angle testing device according to claim 1, characterized in that, The shape of the test groove (110) is adapted to the outer shape of one side of the head end (200) of the steam ablation catheter to accommodate the head end (200) of the steam ablation catheter.

8. The steam ablation catheter puncture needle needle-out length and angle testing device according to claim 7, characterized in that An opening for inserting the head end (200) of the steam ablation catheter is provided outside the test groove (110), and a notch for the corresponding tail of the head end (200) of the steam ablation catheter to pass through is provided on one side of the test groove (110).

9. The steam ablation catheter puncture needle needle - out length and angle testing device according to any one of claims 1 - 8, characterized in that, The device main body (100) is an aluminum alloy housing.

10. The steam ablation catheter puncture needle needle-out length and angle testing device according to any one of claims 1-8, characterized in that, The test mark (400) is one of a fan-shaped mark, a triangular mark or a trapezoidal mark.

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