Interventional catheter and ultrasound imaging device

Abstract

The utility model provides an interventional catheter and ultrasonic imaging equipment, the interventional catheter is provided with an interventional head end, the interventional head end comprises a sound transmission tube body part, a developing tube body part and an ultrasonic transducer, the sound transmission tube body part and the developing tube body part are arranged along the circumferential direction of the interventional catheter, and an accommodating cavity is defined by the sound transmission tube body part and the developing tube body part; the ultrasonic transducer is arranged in the containing cavity and provided with an ultrasonic working end face, and the ultrasonic working end face faces the sound transmission pipe body part. The interventional head end comprises the sound transmission tube body part and the developing tube body part, the sound transmission tube body part has the sound transmission performance, the developing tube body part has the developing function under the developing system, and the sound transmission performance and the developing function are integrated on the interventional head end, so that real-time imaging of the ultrasonic transducer is guaranteed, and the imaging efficiency is improved. And the position of the interventional head end can be displayed under the developing system, so that the phenomenon that visceral organs and vascular passages are poked due to the influence of blind areas on the operation of an operator is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly to an interventional catheter and an ultrasonic imaging device. Background Art

[0002] In recent years, with the development of medical technology, interventional catheters have been widely used in clinical treatment. An interventional catheter is one of the main tools for endovascular interventional treatment, and generally needs to have excellent operability and safety, excellent blood compatibility and lubricity, certain blood softening property, excellent mechanical properties and processability, etc.

[0003] An interventional catheter usually realizes sectional examinations from different perspectives through real-time imaging. However, since there will be a blind area at the head end of the tube body under the imaging system, the blind area will directly affect the operator's operating vision, resulting in phenomena such as puncturing organs and blood vessel passages. Summary of the Utility Model

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present utility model, an interventional catheter is provided, and the technical solution is as follows.

[0005] The interventional catheter has an interventional head end, and the interventional head end includes a sound-transmitting tube body part, a developing tube body part and an ultrasonic transducer. The sound-transmitting tube body part and the developing tube body part are arranged along the circumferential direction of the interventional catheter, and the sound-transmitting tube body part and the developing tube body part enclose a containing cavity. The ultrasonic transducer is arranged in the containing cavity, and the ultrasonic transducer has an ultrasonic working end face, and the ultrasonic working end face faces the sound-transmitting tube body part.

[0006] For the interventional catheter of the present utility model, since the interventional head end includes a sound-transmitting tube body part and a developing tube body part, the sound-transmitting tube body part has sound-transmitting performance, and the developing tube body part has a developing function under the imaging system. Thus, the sound-transmitting performance and the developing function are integrated on the interventional head end, which not only ensures that the ultrasonic transducer can perform real-time imaging, but also can display the position where the interventional head end is located under the imaging system, avoiding the phenomenon that the blind area affects the operator's operation and causes puncturing of organs and blood vessel passages.

[0007] Exemplarily, the sound-transmitting tube body part has an inner wall surface, and a sound-transmitting medium layer is arranged between the inner wall surface and the ultrasonic working end face.

[0008] Exemplarily, the projection of the sound-transmitting tube body part on the ultrasonic working end face at least partially covers the ultrasonic working end face.

[0009] Exemplarily, in the circumferential direction of the interventional catheter, the cross section of the sound-transmitting tube body part is in the shape of a 1 / 2 arc or an arc less than 1 / 2 arc.

[0010] Exemplarily, the sound-transmitting tube body part and the developing tube body part are aligned and connected into one body to form a head end tube, and the containing cavity is arranged inside the head end tube.

[0011] Exemplarily, the interventional catheter further has a flexible hose and a traction member. The head end tube is disposed at one end of the flexible hose. The traction member is disposed through the flexible hose, and one end of the traction member is connected to the head end tube, and the other end extends outside the end of the flexible hose away from the head end tube and is connected to the operation handle.

[0012] Exemplarily, the flexible hose has a support tube section and a bending tube section. The support tube section, the bending tube section and the head end tube are connected in sequence along the axial direction, and the stiffness of the support tube section is greater than that of the bending tube section.

[0013] Exemplarily, the flexible hose has an inner tube body, a metal tube body and an outer tube body. The inner tube body, the metal tube body and the outer tube body are connected in sequence from inside to outside. The outer tube body is connected to the tube wall of the head end tube, and the outer diameter of the outer tube body is consistent with the outer diameter of the head end tube.

[0014] According to another aspect of the present invention, there is provided an ultrasonic imaging device, which includes an ultrasonic main unit and the interventional catheter as described above. The ultrasonic main unit is used to trigger the ultrasonic transducer in the interventional head end of the interventional catheter to work.

[0015] Exemplarily, the ultrasonic imaging device further includes an operation handle. One end of the operation handle is connected to the ultrasonic main unit, and the other end is connected to the interventional catheter. The position and / or angle of the interventional catheter is adjusted through the operation handle.

[0016] A series of simplified concepts are introduced in the content of the utility model, which will be further described in detail in the specific implementation part. The content part of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0017] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings of the present invention are hereby incorporated as part of the present invention for understanding the present invention. The embodiments and descriptions thereof of the present invention are shown in the drawings to explain the principles of the present invention. In the drawings,

[0019] Figure 1 is a schematic structural diagram of an interventional catheter according to an exemplary embodiment of the present invention;

[0020] Figure 2 is Figure 1 a schematic cross-sectional view of the shown interventional catheter;

[0021] Figure 3 is Figure 1Schematic longitudinal sectional view of the intervention head end of the shown intervention catheter;

[0022] Figure 4 is Figure 1 Schematic partial structure view of the shown intervention catheter;

[0023] Figure 5 is Figure 1 Cross-sectional view of an exemplary embodiment of the flexible hose of the shown intervention catheter;

[0024] Figure 6 is Figure 1 Cross-sectional view of another exemplary embodiment of the flexible hose of the shown intervention catheter.

[0025] Wherein, the above-mentioned drawings include the following reference numerals:

[0026] 10. Intervention catheter; 100. Intervention head end; 101. Head end tube; 110. Acoustic transmission tube body; 111. Inner wall surface; 120. Radiopaque tube body; 130. Ultrasonic transducer; 131. Ultrasonic working end face; 132. Outer surface; 133. Connection end; 140. Accommodation cavity; 150. Acoustic transmission medium layer; 200. Flexible hose; 210. Support tube section; 220. Bending tube section; 230. Inner layer tube body; 231. First through hole; 2311. First cavity; 232. Second through hole; 2321. Second cavity; 233. First cavity tube; 234. Second cavity tube; 235. Depressed part; 240. Metal tube body; 250. Adhesive layer; 260. Outer layer tube body; 300. Traction member. Detailed implementation manners

[0027] In the following description, a large number of details are provided to enable a thorough understanding of the present invention. However, those skilled in the art can understand that the following description only exemplarily shows the preferred embodiments of the present invention, and the present invention can be implemented without one or more of such details. In addition, in order to avoid confusion with the present invention, some well-known technical features in the art are not described in detail.

[0028] In order to thoroughly understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the special details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail as follows. However, in addition to these detailed descriptions, the present invention can also have other embodiments.

[0029] An embodiment of the present utility model provides an interventional catheter. The interventional catheter can be applied to various types of devices, including but not limited to ultrasonic imaging devices, such as being applied to an interventional ultrasonic imaging device. The following will introduce in detail an interventional catheter according to an embodiment of the present utility model with reference to the accompanying drawings.

[0030] With reference to Figure 1 and Figure 2 , the interventional catheter 10 may have an interventional head end 100. The interventional head end 100 may include a sound-transmitting tube body portion 110, a developer tube body portion 120, and an ultrasonic transducer 130 (a device that converts electromagnetic energy into mechanical energy for transmitting and receiving ultrasonic signals). The sound-transmitting tube body portion 110 and the developer tube body portion 120 are arranged along the circumferential direction of the interventional catheter 10, and the sound-transmitting tube body portion 110 and the developer tube body portion 120 may enclose to form an accommodation cavity 140. The ultrasonic transducer 130 may be arranged in the accommodation cavity 140. The ultrasonic transducer 130 may have an ultrasonic working end face 131, and the ultrasonic working end face 131 is used for transmitting and / or receiving ultrasonic signals, and the ultrasonic working end face 131 may face the sound-transmitting tube body portion 110. Among them, the sound-transmitting tube body portion 110 may be made of a material with good sound-transmitting performance, including but not limited to PEBAX material (PEBAX is a high-performance polymer, commonly known as nylon elastomer, which has the characteristics of both thermoplastic plastics and rubbers), silicone, silicone oil, etc. The developer tube body portion 120 may be made of a material with developing ability, for example, a material that can be developed in an ultrasonic image during ultrasonic imaging, including but not limited to BaSO4 or platinum-iridium alloy powder, etc.

[0031] For the interventional catheter 10 of the present utility model, since the interventional head end 100 includes a sound-transmitting tube body portion 110 and a developer tube body portion 120, the sound-transmitting tube body portion 110 has sound-transmitting performance, and the developer tube body portion 120 has a developing function under the developing system. Thus, the interventional head end 100 integrates sound-transmitting performance and developing function, which not only ensures that the ultrasonic transducer 130 can perform real-time imaging, but also can synchronously display the position of the interventional head end 100 under the developing system. When the interventional head end 100 enters the lumen, the operator can know the specific position of the interventional head end 100 in the lumen through the ultrasonic image, and can avoid the phenomenon of blind spots affecting the operator's operation and causing damage to organs and blood vessel passages.

[0032] In one embodiment of the present utility model, with reference to Figures 1 to 3, the sound-transmitting tube body portion 110 may have an inner wall surface 111, and a sound-transmitting medium layer 150 may be provided between the inner wall surface 111 and the ultrasonic working end surface 131. Specifically, a gap is formed between the inner wall surface 111 and the ultrasonic working end surface 131, and materials including but not limited to PEBAX materials, silicone rubber, silicone oil, etc. are filled in the gap to form the sound-transmitting medium layer 150. In this way, it is ensured that the ultrasonic working end surface 131 can transmit and receive ultrasonic signals, thereby ensuring the acoustic penetration of the ultrasonic transducer 130.

[0033] It should be understood that there may also be a gap between the outer surface 132 of the ultrasonic transducer 130 (the outer surface 132 refers to the surface of the ultrasonic transducer 130 other than the ultrasonic working end surface 131) and the inner wall of the imaging tube body portion 120. In order to reduce the hardness of the intervention head end 100, no material may be filled in this gap. When the tube material of the intervention head end 100 is relatively soft, materials with high sound-transmitting performance or low sound-transmitting performance may also be filled to play a supporting role.

[0034] Refer back again to Figures 1 to 3 , the projection of the sound-transmitting tube body portion 110 on the ultrasonic working end surface 131 may at least partially cover the ultrasonic working end surface 131. Preferably, the projection of the sound-transmitting tube body portion 110 facing the ultrasonic working end surface 131 may completely cover the ultrasonic working end surface 131. The projection of the sound-transmitting tube body portion 110 on the ultrasonic working end surface 131 may cover the ultrasonic working end surface 131 in both the axial direction and the radial direction of the intervention catheter 10. Thus, the ultrasonic signals emitted by the ultrasonic working end surface 131 can be emitted from the sound-transmitting tube body portion 110 to the greatest extent, and the reflected ultrasonic signals can also pass through the sound-transmitting tube body portion 110 and be received by the ultrasonic working end surface 131 to the greatest extent, ensuring the sound-transmitting performance of the sound-transmitting tube body portion 110. In addition, the projection of the sound-transmitting tube body portion 110 facing the ultrasonic working end surface 131 may be smaller than the ultrasonic working end surface 131. The projection of the sound-transmitting tube body portion 110 facing the ultrasonic working end surface 131 may also be larger than the ultrasonic working end surface 131, but not in a completely covered state. In the above cases, the ultrasonic transducer 130 can be rotated in the accommodation cavity 140 under the drive of the operating handle until the ultrasonic working end surface 131 can transmit and receive ultrasonic signals.

[0035] Exemplarily, refer to Figure 1 and Figure 3, in the circumferential direction of the interventional catheter 10, the cross-section of the sound-transmitting tube body portion 110 can be in the shape of a 1 / 2 arc (i.e., the sound-transmitting tube body portion 110 is a semi-tube) or in the shape of an arc less than 1 / 2 arc. Thus, when the cross-section of the sound-transmitting tube body portion 110 is in the shape of a 1 / 2 arc, the projection of the sound-transmitting tube body portion 110 towards the ultrasonic working end face 131 can completely cover the ultrasonic working end face 131, ensuring the sound-transmitting performance of the sound-transmitting tube body portion 110. When the cross-section of the sound-transmitting tube body portion 110 is in the shape of an arc less than 1 / 2 arc, without affecting the transmission and reception of ultrasonic signals by the ultrasonic working end face 131, the size of the imaging tube body portion 120 can be increased as much as possible, improving the imaging effect. In addition, being in the shape of an arc makes the surface of the interventional catheter 10 as smooth as possible to reduce damage to blood vessels, organs, etc.

[0036] Exemplarily, referring again to Figure 1 and Figure 3 , in the circumferential direction of the interventional catheter 10, the cross-section of the imaging tube body portion 120 can be in the shape of a 1 / 2 arc (the imaging tube body portion 120 is a semi-tube) or in the shape of an arc greater than 1 / 2 arc. Through the imaging effect of the imaging tube body portion 120, the position of the interventional head end 100 can be displayed under the imaging system. When the imaging tube body portion 120 is in the shape of a 1 / 2 arc, it has a good imaging effect; when the imaging tube body portion 120 is in the shape of an arc greater than 1 / 2 arc, while ensuring the ultrasonic performance of the ultrasonic transducer 130, the imaging effect is further improved, thus avoiding the phenomenon of piercing organs, etc. due to the existence of blind spots during use that affect the operation of the operator.

[0037] Referring again to Figures 1 to 3 , the sound-transmitting tube body portion 110 and the imaging tube body portion 120 are aligned and connected together to form the head end tube 101. The accommodating cavity 140 can be provided inside the head end tube 101. Specifically, the sound-transmitting tube body portion 110 can be injection-molded with a material having good sound-transmitting performance, and the imaging tube body portion 120 can be injection-molded with a material having good imaging effect, and thus formed by secondary injection molding with two different materials. The sound-transmitting tube body portion 110 and the imaging tube body portion 120 can also be welded or bonded together. In this way, it is avoided that the head end tube 101 formed by the tube body portions of two different materials generates minute gaps, affecting the use of the interventional catheter 10.

[0038] Exemplarily, referring again to Figure 1 and Figure 2, the interventional catheter 10 may further include a flexible hose 200 and a traction member 300. The head end tube 101 may be disposed at one end of the flexible hose 200. A connection end 133 may be provided near one end of the flexible hose 200 for the ultrasonic transducer 130. The connection end 133 may be used to connect a wire, and the connection end 133 may be a pad connected to the wire. The other end of the wire may be connected to the operating handle and then connected to the main unit through the operating handle to achieve signal communication between the ultrasonic transducer 130 and the main unit. The main unit may accordingly control the ultrasonic transducer 130 to transmit and receive ultrasonic signals. The traction member 300 may be disposed through the flexible hose 200, with one end of the traction member 300 connected to the head end tube 101 and the other end extending outside the end of the flexible hose 200 away from the head end tube 101 and connected to the operating handle. The head end tube 101 and the flexible hose 200 may be connected together by means such as welding or pasting. The head end tube 101 and the flexible hose 200 may also be integrally formed by injection molding. The traction member 300 may be a metal wire or a non-metal wire, etc., and the traction member 300 may be fixed to the head end tube 101 by means such as welding, pasting or tying. With such an arrangement, the flexible hose 200 can be bent by adjusting the traction member 300 through the operating handle, and can advance or retract in the bent lumen, and ultrasonic cross-sectional examinations from different perspectives can also be achieved.

[0039] Exemplarily, referring again to Figure 1 and Figure 2 , the flexible hose 200 may include a support tube section 210 and a bending tube section 220. The support tube section 210, the bending tube section 220 and the head end tube 101 may be connected in sequence along the axial direction, and the stiffness of the support tube section 210 may be greater than that of the bending tube section 220. The support tube section 210 and the bending tube section 220 may be connected together by means such as welding or pasting. The support tube section 210 and the bending tube section 220 may also be integrally formed. With such an arrangement, the supportability and flexibility required for the interventional catheter 10 to pass through human blood vessels or organ cavities are satisfied.

[0040] Exemplarily, referring to Figures 1 to 6 , the flexible hose 200 may include an inner tube body 230, a metal tube body 240 and an outer tube body 260. The inner tube body 230, the metal tube body 240 and the outer tube body 260 may be connected in sequence from the inside out. For example, the inner tube body 230 and the outer tube body 260 may be respectively connected to the metal tube body 240 through an adhesive layer 250. The outer tube body 260 is connected to the wall of the head end tube 101, and the outer diameter of the outer tube body 260 is the same as the outer diameter of the head end tube 101. The wall of the head end tube 101 and the outer tube body 260 may be connected together by means such as welding, fusing or pasting. With such an arrangement, the consistency of the outer diameter of the interventional catheter 10 is maintained, and the phenomenon of scratching the organ due to the connection between the wall of the head end tube 101 and the inner tube body 230 or the metal tube body 240 resulting in inconsistent outer diameter of the interventional catheter 10 is avoided.

[0041] For example, the rigidity of the head end tube 101 may be less than the rigidity of the metal tube body 240. Furthermore, the rigidity of the head end tube 101 may support the rigidity of the tube segment 210 and the curved tube segment 220. Such a configuration may make the head end soft enough to prevent the interventional catheter 10 from moving in the lumen and puncturing an organ.

[0042] Combined with reference Figure 1 and Figure 5 The inner tube body 230 may be provided with a first through hole 231 and a plurality of second through holes 232. The first through hole 231 may penetrate from one end of the inner tube body 230 to the other end and form a first cavity 2311 in the middle of the inner tube body 230. The second through hole 232 may penetrate from one end of the inner tube body 230 to the other end and form a second cavity 2321 on the inner tube body 230 away from the center of the inner tube body 230. The traction member 300 may be disposed in the second cavity 2321. The inner tube body 230 can be a multi-lumen tube. Specifically, the inner tube body 230 can be provided with a first through hole 231 and four second through holes 232. The first through hole 231 forms a first cavity 2311, and the four second through holes 232 form four second cavities 2321. Thus, the inner tube body 230 forms a tube body with one large cavity and four small cavities. The traction member 300 can be inserted into the four second cavities 2321. When one of the two diagonally located second cavities 2321 is pulled and bent by the traction member 300, the bending tube section 220 and the supporting tube section 210 bend in the corresponding direction. In addition, the inner tube body 230 having multiple cavities can make the tube body harder. In this way, the inner tube body 230 has greater rigidity. The interventional catheter 10 having the inner tube body 230 can be used in environments that require stronger support and pushing performance.

[0043] Combined with reference Figure 1 and Figure 6, the inner tube body 230 may include a first cavity tube 233 and a plurality of second cavity tubes 234. The outer peripheral edge of the first cavity tube 233 may be recessed toward the center position of the inner tube body 230 to form a plurality of recessed portions 235. The plurality of second cavity tubes 234 and the plurality of recessed portions 235 may correspond to each other one by one and be located within their respective corresponding recessed portions 235. The traction member 300 may be disposed through the second cavity tubes 234. The inner tube body 230 may be formed by combining a plurality of tube bodies. Specifically, the inner tube body 230 may include one first cavity tube 233 and four second cavity tubes 234. The outer peripheral edge of the first cavity tube 233 is recessed toward the center position of the inner tube body 230 to form four recessed portions 235. The four second cavity tubes 234 and the four recessed portions 235 correspond to each other one by one and are located within their respective corresponding recessed portions 235. Thus, the inner tube body 230 is formed by combining one large single-cavity tube and four small single-cavity tubes. The traction member 300 may be disposed through the four second cavity tubes 234. When one of the two second cavity tubes 234 in the diagonal positions is bent by the traction member 300, the bent tube section 220 and the support tube section 210 are bent in the corresponding direction. The hardness of the inner tube body 230 provided with a plurality of tubes is smaller than that of the inner tube body 230 having a plurality of cavities. Moreover, based on the current process, the diameter of the inner tube body 230 provided with a plurality of tubes may be smaller than the diameter of the inner tube body 230 having a plurality of cavities. In this way, the inner tube body 230 is softer, and the interventional catheter 10 having the inner tube body 230 can be applied to a complex and twisted lumen environment.

[0044] According to another aspect of the present invention, there is provided an ultrasonic imaging device, which includes an ultrasonic main unit and the interventional catheter 10 as described above. The ultrasonic main unit is configured to trigger the ultrasonic transducer 130 in the interventional head end 100 of the interventional catheter 10 to operate.

[0045] The ultrasonic imaging device further includes an operation handle. One end of the operation handle is connected to the ultrasonic main unit, and the other end is connected to the interventional catheter 10; the interventional catheter 10 can be adjusted in position and / or angle through the operation handle.

[0046] Since the interventional catheter 10 as described above has the above beneficial effects, the ultrasonic imaging device including the interventional catheter 10 as described above also has the above beneficial effects, which will not be repeated here one by one.

[0047] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front", "rear", "upper", "lower", "left", "right", "lateral", "vertical", "perpendicular", "horizontal", "top", "bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model; the orientation terms "inner" and "outer" refer to the inside and outside relative to the contour of each component itself.

[0048] For the convenience of description, regional relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the regional positional relationship between one or more components or features shown in the drawings and other components or features. It should be understood that the regional relative terms not only include the orientation of the components described in the drawings but also different orientations during use or operation. For example, if the components in the drawings are inverted as a whole, the components "above other components or features" or "over other components or features" will include the situation where the components are "below other components or structures" or "under other components or structures". Thus, the exemplary term "above..." can include both the orientation of "above..." and "below...". In addition, these components or features can also be positioned at other different angles (such as rotating 90 degrees or other angles), and this article is intended to cover all such situations.

[0049] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, components, assemblies, and / or combinations thereof.

[0050] It should be noted that the terms "first", "second", etc. in the description, claims, and the above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0051] The present utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative and explanatory purposes, and are not intended to limit the present utility model to the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model. The scope of protection of the present utility model is defined by the appended claims and their equivalent scope.

Claims

1. An interventional catheter having an interventional tip, characterized in that: The interventional tip includes a sound-transmitting tube body, a developing tube body and an ultrasonic transducer. The sound-transmitting tube body and the developing tube body are arranged along the circumference of the interventional catheter, and the sound-transmitting tube body and the developing tube body are enclosed to form a accommodating cavity. The ultrasonic transducer is arranged in the accommodating cavity. The ultrasonic transducer has an ultrasonic working end face, and the ultrasonic working end face faces the sound-transmitting tube body.

2. The interventional catheter according to claim 1, characterized in that: The sound-transmitting tube body has an inner wall surface, and a sound-transmitting medium layer is arranged between the inner wall surface and the ultrasonic working end surface.

3. The interventional catheter according to claim 1, characterized in that: The projection of the sound-transmitting tube body on the ultrasonic working end surface at least partially covers the ultrasonic working end surface.

4. The interventional catheter according to claim 3, characterized in that: In the circumferential direction of the interventional catheter, the cross-section of the sound-transmitting tube body is in the shape of a 1 / 2 arc or an arc smaller than a 1 / 2 arc.

5. The interventional catheter according to any one of claims 1 to 4, characterized in that: The sound-transmitting tube body and the developing tube body are matched and connected to form a head end tube, and the accommodating cavity is arranged inside the head end tube.

6. The interventional catheter according to claim 5, characterized in that: The interventional catheter also has a flexible hose and a traction piece. The head end tube is arranged at one end of the flexible hose. The traction piece is passed through the flexible hose. One end of the traction piece is connected to the head end tube, and the other end extends out of the end of the flexible hose away from the head end tube and is connected to an operating handle.

7. The interventional catheter according to claim 6, characterized in that: The flexible hose comprises a supporting pipe section and a bending pipe section, wherein the supporting pipe section, the bending pipe section and the head end pipe are sequentially connected along the axial direction, and the rigidity of the supporting pipe section is greater than that of the bending pipe section.

8. The interventional catheter according to claim 6, characterized in that: The flexible hose comprises an inner tube body, a metal tube body and an outer tube body, wherein the inner tube body, the metal tube body and the outer tube body are connected in sequence from the inside to the outside, the outer tube body is connected to the tube wall of the head end tube, and the outer diameter of the outer tube body is consistent with the outer diameter of the head end tube.

9. An ultrasonic imaging device, characterized in that: The invention comprises an ultrasound host and an interventional catheter as claimed in any one of claims 1 to 8, wherein the ultrasound host is used to trigger the operation of an ultrasound transducer in the interventional tip of the interventional catheter.

10. The ultrasonic imaging device according to claim 9, characterized in that: The ultrasonic imaging device also includes an operating handle, one end of which is connected to the ultrasonic host, and the other end of which is connected to the interventional catheter; the position and / or angle of the interventional catheter is adjusted by the operating handle.

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