Percutaneous interventional ultrasound elastography catheter needle
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LEAPMED MEDICAL TECH
- Filing Date
- 2024-12-10
- Publication Date
- 2026-05-29
AI Technical Summary
The existing percutaneous ultrasound examination is not close enough to the deep tissue, resulting in the tissue resolution not high enough, so it is impossible to accurately identify the boundaries between tumors and normal tissues, and it is impossible to obtain accurate intra-tissue elastic imaging and tissue hardness indicators at zero distance, affecting accurate diagnosis and treatment.
Design a percutaneous interventional ultrasonic elastologic catheter needle that includes an external catheter, an ultrasonic assembly and a negative pressure pathway. The negative pressure path forms or releases negative pressure between the ultrasonic component and the tissue in the body through the negative pressure path, and achieves slight deformation and recovery of the tissue, thereby obtaining tissue elastic parameters and hardness information through comparative analysis of ultrasonic images.
It improves tissue resolution, achieves accurate identification of the boundaries between tumors and normal tissues, and can obtain accurate elastic imaging and hardness indicators in the tissue at zero distance, improving the accuracy of diagnosis and treatment.
Smart Images
Figure CN122121802A_ABST
Abstract
Description
Percutaneous ultrasound elastography catheter needle
[0001] CROSS-REFERENCE TO RELATED APPLICATIONS
[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 21, 2023, with application number 2023117670457, and application name "A rotary cutting needle body, rotary cutting needle device and method of use thereof", all contents of which are incorporated by reference into this application. Technical Field
[0003] The present application relates to the technical field of ultrasound equipment, and in particular to a percutaneous interventional ultrasound elastography catheter needle. Background Art
[0004] There are differences in elasticity between different tissue structures. For example, some malignant tumor tissues are harder than fibrous tissues, which are usually harder than glandular tissues, which are harder than fat tissues. Since the elastic coefficients of different tissues are quite different, the type of tissue can be determined based on the elasticity test. An ultrasonic elastic imaging technology has been proposed. Its principle is to apply pressure to the same tissue to deform the tissue. By comparing the ultrasonic images formed by the ultrasonic echo signals before and after the pressure is applied, the information related to the elasticity of the tissue can be captured. The elastic parameters of the tissue can be obtained through data analysis to determine the type of tissue. The traditional pressure operation is to apply force on the surface of the skin to press the body part. The force on the tissue deep under the skin is limited, and the detection error is large.
[0005] Existing transcutaneous ultrasound examinations have the following defects because the probe is not close enough to deep tissue: the tissue resolution is not high enough to accurately identify the boundary between tumors and normal tissues, resulting in inaccurate ultrasound interventional puncture surgery; it is impossible to obtain accurate tissue elasticity imaging and tissue hardness indicators at zero distance, making it difficult to achieve accurate diagnosis and treatment with the help of ultrasound elasticity imaging technology. Summary of the Invention
[0006] In view of this, the present application proposes a percutaneous interventional ultrasound elastography catheter needle that can solve the above-mentioned existing technical problems. The present application provides the following technical solutions:
[0007] According to the embodiment of the example of the present application, the percutaneous interventional ultrasound elastography catheter needle includes: an outer catheter, the front end of the outer catheter is a puncture tip, the outer catheter has an ultrasound component accommodating cavity at a position close to the puncture tip, the side position of the ultrasound component accommodating cavity has an ultrasound window, the outer catheter has a first channel arranged along the axial direction, the front end of the first channel is connected to the ultrasound component accommodating cavity; an ultrasound component, the ultrasound component is arranged in the ultrasound accommodating cavity, the scanning sound beam surface of the ultrasound component corresponds to the position of the ultrasound window; and a negative pressure passage, the negative pressure passage is configured to be connected to a negative pressure providing device to form / release negative pressure between the ultrasound component and the tissue in the body.
[0008] According to the percutaneous interventional ultrasound elastography catheter needle of an exemplary embodiment of the present application, the negative pressure passage includes a gap, which is configured to be located between the ultrasound component and the ultrasound accommodating cavity, and the rear end of the first channel is configured to be connected to the negative pressure providing device.
[0009] According to the percutaneous interventional ultrasound elastography catheter needle of the exemplary embodiment of the present application, the rear end of the first channel is configured to be detachably connected to the negative pressure providing device.
[0010] According to the percutaneous interventional ultrasound elastography catheter needle of an exemplary embodiment of the present application, the negative pressure passage includes a second channel arranged along the axial direction, the front end of the second channel is arranged to be adjacent to the ultrasound window, and the rear end of the second channel is arranged to be detachably connected to the negative pressure providing device.
[0011] According to the percutaneous interventional ultrasound elastography catheter needle of the exemplary embodiment of the present application, the second channel is configured to be used for inserting a working instrument when the negative pressure providing device is not connected.
[0012] The percutaneous interventional ultrasound elastography catheter needle according to an exemplary embodiment of the present application further includes: an ultrasound wire connected to the ultrasound component, wherein the ultrasound wire is disposed in the first channel.
[0013] The percutaneous interventional ultrasound elastography catheter needle according to the exemplary embodiment of the present application further includes: a first negative pressure control module, which is arranged on the outer catheter and is used to control the start / stop of the negative pressure state in the first channel.
[0014] According to the exemplary embodiment of the present application, the percutaneous interventional ultrasound elastography catheter needle further includes: a handle, which is configured to wrap the rear end of the outer catheter for easy gripping by the user, and the handle has an operation button, which is coupled to the first negative pressure control module for easy user operation and control.
[0015] According to the percutaneous interventional ultrasound elastography catheter needle of the exemplary embodiment of the present application, a sealing plug is provided at the rear end of the first channel.
[0016] The percutaneous interventional ultrasound elastography catheter needle according to the exemplary embodiment of the present application further includes: a second negative pressure control module, which is arranged on the outer catheter and is used to control the start / stop of the negative pressure state in the second channel.
[0017] According to the exemplary embodiment of the present application, the percutaneous interventional ultrasound elastography catheter needle can provide a pulsed negative pressure with a vacuum degree of 1% to 99% between the ultrasound component and the body tissue through the negative pressure passage.
[0018] The percutaneous interventional ultrasound elastography catheter needle of this embodiment is equipped with a negative pressure pathway. This allows for instantaneous suction and release of tissue near the ultrasound component by controlling the on / off pressure in the negative pressure pathway. During the suction phase, the tissue undergoes slight deformation, while during the release phase, the tissue returns to its original shape. Therefore, by comparing and analyzing ultrasound images in these two states, parameters related to tissue elasticity before and after deformation can be obtained. Data analysis can then reveal information such as tissue hardness, enabling ultrasound elastography. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0020] FIG1 is a perspective view of a percutaneous interventional ultrasound elastography catheter needle according to an exemplary embodiment of the present application;
[0021] FIG2 is a front view of the percutaneous ultrasound elastography catheter needle shown in FIG1 ;
[0022] FIG3A is a cross-sectional view of the percutaneous ultrasound elastography catheter needle shown in FIG1 ;
[0023] FIG3B is a partial enlarged view of the position of the square frame in FIG3A;
[0024] FIG3C is a partial enlarged schematic diagram of the front section of the percutaneous interventional ultrasound elastography catheter needle shown in FIG1 in a non-negative suction state;
[0025] FIG3D is a partially enlarged schematic diagram of the front section of the catheter needle of the percutaneous interventional ultrasound elastography catheter needle shown in FIG1 in a negative suction state;
[0026] FIG4 is a side view of the percutaneous ultrasound elastography catheter needle shown in FIG1 ;
[0027] FIG5 is a perspective view of some components of the percutaneous ultrasound elastography catheter needle shown in FIG1 ;
[0028] FIG6 is a cross-sectional view of a front section of a catheter needle for percutaneous interventional ultrasound elastography according to another exemplary embodiment of the present application.
[0029] In the picture:
[0030] Outer catheter 1; puncture tip 101; ultrasonic component accommodating cavity 102; ultrasonic window 103; first channel 104; second channel 105; first negative pressure control module 106, sealing plug 107; pore 1071, negative pressure connection port 1072; ultrasonic component 2; damping layer 201; crystal layer 202; acoustic permeable membrane 203; ultrasonic guide wire 204; handle 3; operation button 301; gap 4; working instrument 5; internal tissue 7; remaining space 8; negative pressure providing device 9. DETAILED DESCRIPTION
[0031] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.
[0032] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, terms such as "mounted" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0033] As shown in FIG1 , a percutaneous interventional ultrasound elastography catheter needle according to an exemplary embodiment of the present application primarily comprises an outer catheter 1, an ultrasound assembly 2, and a negative pressure channel. As shown in FIG2 , the term "front end" as used herein refers to the end farther from the operator; "rear end" refers to the end closer to the operator. The front end of the outer catheter 1 is a puncture tip 101. Near the puncture tip 101, the outer catheter 1 has an ultrasound assembly accommodating cavity 102 (see FIG3A and FIG3B ). An ultrasound window 103 is provided to the side of the ultrasound assembly accommodating cavity 102. The outer catheter 1 has a first channel 104 arranged axially, the front end of which is connected to the ultrasound assembly accommodating cavity 102. The ultrasound assembly 2 is disposed within the ultrasound accommodating cavity 102, with the scanning acoustic beam plane of the ultrasound assembly 2 corresponding to the position of the ultrasound window 103. The negative pressure channel is configured to connect to a negative pressure providing device 9 for generating and releasing negative pressure between the ultrasound assembly 2 and the tissue 7 within the body. The percutaneous interventional ultrasound elastography catheter needle further comprises an optional handle 3 , which is arranged to wrap around the rear end of the outer catheter 1 for easy gripping by the user.
[0034] When the percutaneous interventional negative pressure ultrasound catheter according to the embodiment of the present application starts ultrasound examination, the needle percutaneously punctures into the tissue or close to the edge of the tissue, so that the ultrasound component 2 is wrapped by the internal tissue 7 or is extremely close to the internal tissue 7. There was originally a small amount of air or tissue fluid between the ultrasound component 2 and the internal tissue 7, and this part of the air or tissue fluid was originally contained and confined in the ultrasound holding cavity 102. After this small amount of air or tissue fluid is sucked out by negative pressure, there is no other isolation between the ultrasound component 2 and the internal tissue. As can be seen from the above, when the ultrasound holding cavity 102 switches between the negative pressure / pressure release states, this will cause the tissue to change shape / restore shape, which can provide the probe with conditions for elastic imaging.
[0035] It should be noted that the negative pressure providing device 9 can be a device externally connected to the percutaneous interventional ultrasound elastography catheter needle, and specifically, an existing commercially available vacuum pump can be used. The negative pressure providing device 9 can provide a negative pressure with a vacuum degree of 1% to 99% for the negative pressure passage. Within this numerical range, the vacuum degree can specifically be 1%, 5%, 10%, 20%, 30%, 50%, 70%, 80%, 90%, 95% and 99%, etc. Selecting such a negative pressure providing device 9 can make the percutaneous interventional ultrasound elastography catheter needle widely applicable to adsorbing different types of in vivo tissues. The negative pressure providing device 9 can provide pulsed negative pressure. In other words, the negative pressure is not continuous for a long time, but instantaneous, and the duration of the working phase and the intermittent phase can be precisely controlled.
[0036] FIG3A is a cross-sectional view of the percutaneous ultrasound elastography catheter needle shown in FIG1 ; FIG3B is a partial enlarged view of the boxed portion in FIG3A . As shown in FIG3A and FIG3B , in the percutaneous ultrasound elastography catheter needle according to an embodiment of the present application, the ultrasonic component 2 may include a damping layer 201, a crystal layer 202, and an acoustically permeable membrane 203 stacked in sequence, with the acoustically permeable membrane 203 aligned with the ultrasonic window 103 . The acoustically permeable membrane 203 is dustproof and waterproof, and can protect the ultrasonic component 2 . Furthermore, as shown in FIG3A and FIG3B , the percutaneous ultrasound elastography catheter needle according to an embodiment of the present application may further include an ultrasonic guide wire 204 connected to the ultrasonic component 2, with the ultrasonic guide wire 204 disposed within the first channel 104 . This arrangement does not interfere with the negative pressure extraction operation of the first channel 104 , nor does it interfere with the surgical operation of the working instrument 5 in the second channel 105 .
[0037] Figure 3C is a partially enlarged schematic diagram of the front section of the catheter needle of the percutaneous interventional ultrasound elastography catheter needle shown in Figure 1 in a non-negative suction state; Figure 3D is a partially enlarged schematic diagram of the front section of the catheter needle of the percutaneous interventional ultrasound elastography catheter needle in a negative suction state according to an embodiment of the present application.
[0038] In the percutaneous interventional ultrasound elastography catheter needle shown in Figures 3A and 3B, the negative pressure path may include a gap 4, which is configured to be located between the ultrasound component 2 and the ultrasound accommodating cavity 102, and the rear end of the first channel 104 is configured to be detachably connected to the negative pressure providing device 9. The operating steps of the percutaneous interventional ultrasound elastography catheter needle of this embodiment when implementing ultrasound elastography are as follows: use the sharp puncture tip 101 to percutaneously puncture the subcutaneous tissue, and then push the percutaneous interventional ultrasound elastography catheter needle to a suitable depth. At this time, the ultrasound window 103 is located near the target desired internal tissue, and the front section of the outer catheter 1 and the surface of the ultrasound component 2 are wrapped by the internal tissue 7. There is only a narrow remaining space 8 between the outer catheter 1, the ultrasound component 2 and the internal tissue 7 (see Figure 3C, there is a remaining space 8). There is a gap 4 between the ultrasound component 2 and the outer catheter 1, and the gap 4 can allow airflow to pass through. The ultrasound window 103 serves as a side opening of the outer catheter 1, effectively forming a path from "residual space 8 - ultrasound window 103 - gap 4 - first channel 104." Therefore, air or tissue fluid in the residual space 8 can be drawn out through this path by negative pressure. Then, the rear end of the first channel 104 is connected to the negative pressure providing device 9, and after the first channel 104 is pumped into a negative pressure state, the internal tissue 7 is now adsorbed on the ultrasound window 103 and closely adheres to the ultrasound component 2, and the original residual space 8 is filled (see FIG3D , where no residual space 8 exists). This, on the one hand, brings the distance between the internal tissue 7 and the ultrasound component 2 to almost zero, enabling the acquisition of precise ultrasound images with higher resolution (up to 0.1 mm). On the other hand, the instantaneous negative pressure suction can exert a slight force on the internal tissue, causing it to undergo a slight deformation. The subsequent release of the negative pressure can then restore the internal tissue 7 to its original state. Repeated negative pressure suction and release can produce continuous slight deformation. Therefore, the ultrasonic component 2 can capture parameters related to tissue elasticity by analyzing echo signals before and after slight deformation to reflect the hardness of the tissue, thereby realizing the ultrasonic elastic imaging function.
[0039] In the percutaneous interventional ultrasound elastography catheter needle according to an embodiment of the present application, the gap 4 is preferably, but not limited to, 0.5 mm to 1.5 mm. This gap size is preferred because if the gap is too large, the ultrasound assembly 2 is prone to shaking and shifting; if the gap is too small, gas cannot flow smoothly.
[0040] FIG4 is a side view of the percutaneous interventional ultrasound elastography catheter needle shown in FIG1 ; FIG5 is a stereoscopic view of some components of the percutaneous interventional ultrasound elastography catheter needle shown in FIG1 . As shown in FIG4 and FIG5 , a sealing plug 107 may be provided at the rear end of the outer catheter 1. The sealing plug 107 performs the functions of sealing and preventing air leakage. The sealing plug 107 may be provided with a fine hole 1071 for the wires (including the ultrasonic wire 204, the wire connected to the first negative pressure control module 106, and the wire connected to the second negative pressure control module) to pass through, as well as a negative pressure connection port 1072 for the external negative pressure providing device 9.
[0041] As shown in FIG5 , the percutaneous interventional ultrasound elastography catheter needle according to an exemplary embodiment of the present application may further include a first negative pressure control module 106. The first negative pressure control module 106 is disposed on the outer catheter 1 and is used to control the start / stop of the negative pressure state in the first channel 104. Furthermore, the handle 3 may further include an operation button 301 (see FIG1 and FIG3 ), which is coupled to the first negative pressure control module 106 for user operation and control.
[0042] In the percutaneous interventional ultrasound elastography catheter needle according to an exemplary embodiment of the present application, the outer catheter 1 has a second channel 105 arranged along the axial direction. The front end of the second channel 105 is arranged to be adjacent to the ultrasound window 103, and the rear end of the second channel 105 is arranged to be detachably connected to the negative pressure providing device 9.
[0043] As shown in Figures 1 and 3A, the second channel 105 can be used to insert the working instrument 5. The working instrument 5 can be a puncture needle, a biopsy needle, or an ablation needle, or other slender instruments. The percutaneous interventional ultrasound elastography catheter needle of this embodiment can provide a working channel for interventional diagnosis and treatment, facilitating surgical procedures such as biopsy sampling, tumor ablation, lesion drug delivery, and energy delivery. It should be noted that when the second channel 105 is used to insert the working instrument, the rear end of the second channel 105 is not connected to the negative pressure providing device 9.
[0044] The second channel 105 can also function as a negative pressure channel. It should be noted that when the second channel 105 is used as a negative pressure channel, the working instrument 5 is not inserted therein, and the rear end of the second channel 105 is connected to the negative pressure providing device 9. When the negative pressure providing device 9 begins operating and draws air to create a negative pressure, the front opening of the second channel 105 can negatively pressure-absorb nearby tissue, assisting in elastic ultrasound imaging. Specifically, when the rear end of the first channel 105 is connected to the negative pressure providing device 9 and the second channel 105 is drawn to a negative pressure state, air or tissue fluid in the remaining space 8 can be negatively pressure-absorbed through the path from the remaining space 8 near the front end of the second channel 105 to the front opening of the second channel 105 to the second channel 105. At this point, the body tissue 7 near the ultrasound window 103 is deformed by the instantaneous negative suction pressure from the second channel 105. Subsequently, when the negative pressure is removed from the second channel 105, the body tissue 7 returns to its original shape. This enables the ultrasound assembly 2 to perform ultrasonic elastic imaging.
[0045] The percutaneous interventional ultrasound elastography catheter needle according to the exemplary embodiment of the present application may further include: a second negative pressure control module (not shown, having the same specific structure and configuration as the first negative pressure control module, except that the module is positioned separately from the first negative pressure control module). The second negative pressure control module may be disposed on the outer catheter 1 to control the start / stop of the negative pressure state in the second channel 105.
[0046] Figure 6 is a cross-sectional view of the front section of the catheter needle of the percutaneous interventional ultrasound elastography catheter needle according to another embodiment of the present application. In this embodiment, the negative pressure path only includes a second channel 105 arranged along the axial direction. The front end of the second channel 105 is arranged to be adjacent to the ultrasound window 103, and the rear end of the second channel 105 is arranged to be detachably connected to the negative pressure providing device 9. In this embodiment, the first channel 104 is mainly used to lay the ultrasound wire 204, and is not externally connected to the negative pressure providing device 9, that is, it is not used as a negative pressure channel. In this embodiment, the acoustically transparent membrane 203 can completely cover the entire ultrasound window 103, completely isolating the body tissue 7 from the damping layer 201 and the crystal layer 202 of the ultrasound component, and also completely isolating the body tissue 7 from the first channel 104.
[0047] In summary, the percutaneous interventional ultrasound elastography catheter needle of the exemplary embodiment of the present application is provided with a negative pressure pathway. By controlling the start / stop of the negative pressure in the negative pressure pathway, the catheter needle can instantaneously negatively suction / release the tissue near the ultrasonic component. In the negative suction state, the tissue undergoes slight deformation under force, and in the release state, the tissue returns to its original shape. Therefore, by comparing and analyzing the different ultrasound images in these two states, parameters related to the elasticity of the tissue before and after deformation can be obtained. Data analysis can then yield information such as tissue hardness, thereby realizing the ultrasound elastography function. Furthermore, the negative pressure pathway can be implemented as the first channel and / or the second channel. Therefore, the percutaneous interventional ultrasound elastography catheter needle of the exemplary embodiment of the present application can flexibly implement ultrasound elastography in a variety of ways, offering the advantage of wide application.
[0048] The above specific embodiments do not constitute a limitation on the scope of protection of this application. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the scope of protection of this application.
Claims
1. A percutaneous interventional ultrasound elastic imaging catheter needle, characterized in that: include: An outer catheter (1), wherein the front end of the outer catheter (1) is a puncture tip (101), an ultrasonic component accommodating cavity (102) is provided at a position of the outer catheter (1) close to the puncture tip (101), an ultrasonic component accommodating cavity (102) is provided at a side position of the ultrasonic component accommodating cavity (102), and the outer catheter (1) has a first channel (104) arranged along the axial direction, and the front end of the first channel (104) is connected to the ultrasonic component accommodating cavity (102); An ultrasonic component (2), the ultrasonic component (2) being arranged in the ultrasonic accommodating cavity (102), the scanning sound beam surface of the ultrasonic component (2) corresponding to the position of the ultrasonic window (103); and A negative pressure passage is provided, wherein the negative pressure passage is configured to be connected to a negative pressure providing device (9) so as to form / release negative pressure between the ultrasonic component (2) and the body tissue (7).
2. The percutaneous interventional ultrasound elastography catheter needle according to claim 1, characterized in that: The negative pressure passage comprises a gap (4), wherein the gap (4) is arranged to be located between the ultrasonic component (2) and the ultrasonic accommodating cavity (102), and the rear end of the first channel (104) is arranged to be connected to the negative pressure providing device (9).
3. The percutaneous interventional ultrasound elastic imaging catheter needle according to claim 2, characterized in that: The rear end of the first channel (104) is configured to be detachably connected to the negative pressure providing device (9).
4. The percutaneous interventional ultrasound elastic imaging catheter needle according to claim 1, characterized in that: The negative pressure passage comprises a second channel (105) arranged along the axial direction, the front end of the second channel (105) is arranged to be adjacent to the ultrasonic window (103), and the rear end of the second channel (105) is arranged to be detachably connected to the negative pressure providing device (9).
5. The percutaneous interventional ultrasound elastography catheter needle according to claim 4, characterized in that: The second channel is configured to be used for inserting a working instrument (5) when the negative pressure providing device (9) is not connected.
6. The percutaneous interventional ultrasound elastography catheter needle according to claim 1, characterized in that: Also includes: An ultrasonic wire (204) connected to the ultrasonic component (2), wherein the ultrasonic wire (204) is disposed in the first channel (104).
7. The percutaneous interventional ultrasound elastic imaging catheter needle according to claim 1, characterized in that: Also includes: A first negative pressure control module (106), wherein the first negative pressure control module (106) is arranged on the outer catheter (1) and is used to control the start / stop of the negative pressure state in the first channel (104).
8. The percutaneous interventional ultrasound elastic imaging catheter needle according to claim 7, characterized in that: Also includes: A handle (3), wherein the handle (3) is configured to wrap around the rear end of the outer catheter (1) for easy gripping by a user, and an operation button (301) is provided on the handle (3), wherein the operation button (301) is coupled to the first negative pressure control module (106) for easy operation and control by a user.
9. The percutaneous interventional ultrasound elastography catheter needle according to claim 2, characterized in that: A sealing plug (107) is provided at the rear end of the first channel (104).
10. The percutaneous interventional ultrasound elastography catheter needle according to claim 4, characterized in that: Also includes: A second negative pressure control module, the second negative pressure control module is arranged on the outer catheter (1) and is used to control the start / stop of the negative pressure state in the second channel (105).
11. The percutaneous interventional ultrasound elastography catheter needle according to any one of claims 1 to 10, characterized in that: Through the negative pressure passage, a pulsed negative pressure with a vacuum degree of 1% to 99% can be provided between the ultrasonic component (2) and the body tissue (7).