Interventional catheter and ultrasound imaging device
By setting a spiral cutting groove on the metal pipe body of the intervention catheter to achieve a gradient of stiffness and combining the traction member of the inner pipe body, the problem of insufficient flexibility and bending of the intervention catheter is solved, and the operation handling and use flexibility are improved.
Patent Information
- Application Number
- CN202421122624.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The flexibility and curvature of the existing interventional catheters affects the handling and flexibility of operation.
A spiral cutting groove is provided on the metal pipe body, and the stiffness of the metal pipe body is gradually changed by gradually changing the pitch and/or groove width of the spiral cutting groove, and combined with the setting of the inner pipe body to penetrate the traction member, allowing the intervention catheter to be actively bending and adjust in different directions.
It enhances the flexibility and support of the interventional catheter, improves the bending and handling of the interventional catheter, making it more suitable for complex medical operations.
Smart Images
Figure CN223041991U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, and specifically, 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] The interventional catheters in the related art have metal tube bodies, and these metal tube bodies often maintain the same stiffness, resulting in poor flexibility and small bending degree of the interventional catheter, or directly providing convex ribs on the metal tube body with gradually changing stiffness for threading a traction member, which affects the law of gradual change of the stiffness of the metal tube body and makes the controllability during operation and use poor. 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 includes a metal tube body, an inner layer tube body and a traction member. The metal tube body is sleeved outside the inner layer tube body. The outer wall surface of the metal tube body has spiral cutting grooves. From the first end to the second end of the metal tube body, the pitch of at least one section of the spiral cutting grooves is gradually changed, and / or the groove width of at least one section of the spiral cutting grooves is gradually changed. The traction member is threaded through the inner layer tube body and has a force application end extending outside the second end.
[0006] For the interventional catheter of the present utility model, since spiral cutting grooves are provided on the metal tube body, the gradual change of the pitch and / or the groove width of the spiral cutting grooves is used to realize the gradual change of the stiffness of the metal tube body, which not only enhances the flexibility of the metal tube body, but also meets the supportability and pushability of the metal tube body. Combined with the setting that the traction member is threaded through the inner layer tube body, applying a force to the force application end of the traction member can actively bend and adjust the entire interventional catheter, thereby increasing the bending degree of the interventional catheter in different directions, and further meeting the controllability required during operation and use.
[0007] Exemplarily, the metal tube body includes a bending flexible tube section and a supporting flexible tube section. The bending flexible tube section is close to the first end, and the supporting flexible tube section is close to the second end. The length of the supporting flexible tube section is greater than the length of the bending flexible tube section.
[0008] Exemplarily, the bending flexible tube section is connected to the supporting flexible tube section. From the first end to the second end, the pitch of the spiral cutting grooves is gradually changed, and / or the groove width of the spiral cutting grooves is gradually changed.
[0009] Exemplarily, the bent hose section has a distal end away from the first end. From the first end to the distal end, the pitch of the helical cutting groove is equal, and the groove width of the helical cutting groove is equal.
[0010] Exemplarily, the metal tube body further has a transition section, which has a first connection end and a second connection end. The first connection end is connected to the bent hose section, and the second connection end is connected to the support hose section.
[0011] Exemplarily, from the first connection end to the second connection end, the pitch of the helical cutting groove gradually increases from P1 to P2, and the groove width of the helical cutting groove is equal; wherein, P1 is the pitch of the helical cutting groove at the connection with the first connection end on the bent hose section, and P2 is the pitch of the helical cutting groove at the connection with the second connection end on the support hose section.
[0012] Exemplarily, the support hose section has a third connection end connected to the second connection end. From the third connection end to the second end, the pitch of the helical cutting groove gradually increases from P2.
[0013] Exemplarily, the metal tube body further has a transition section, which has a first connection end and a second connection end. The first connection end is connected to the bent hose section, and the second connection end is connected to the support hose section. From the first connection end to the second connection end, the groove width L1 of the helical cutting groove gradually decreases to L2, and the pitch of the helical cutting groove is equal; wherein, L1 is the groove width of the helical cutting groove at the connection with the first connection end on the bent hose section, and L2 is the groove width of the helical cutting groove at the connection with the second connection end on the support hose section.
[0014] Exemplarily, the support hose section has a third connection end connected to the second connection end. From the third connection end to the second end, the groove width of the helical cutting groove gradually decreases from L2.
[0015] Exemplarily, the length of the transition section is less than or equal to the length of the bent hose section.
[0016] Exemplarily, the outer diameter of the metal tube body is constant or gradually increases from the first end to the second end.
[0017] Exemplarily, the interventional catheter further includes an outer tube body and a braided layer. The inner tube body, the metal tube body, the braided layer and the outer tube body are sequentially connected from the inside to the outside to form a flexible hose.
[0018] Exemplarily, the outer tube body has a third end corresponding to the first end and a fourth end corresponding to the second end. From the third end to the fourth end, the stiffness of the outer tube body is gradually changed.
[0019] Exemplarily, a first through hole and multiple second through holes are provided on the inner tube body, the first through hole penetrates from one end of the inner tube body to the other end and forms a first cavity in the middle of the inner tube body, the second through hole penetrates from one end of the inner tube body to the other end and forms a second cavity on the inner tube body away from the center of the inner tube body, and the traction piece is passed through the second cavity.
[0020] Exemplarily, the inner tube body includes a first lumen and multiple second lumens, the outer periphery of the first lumen is recessed toward the center of the inner tube body to form multiple recessed portions, the multiple second lumens correspond one by one to the multiple recessed portions and are located in their respective corresponding recessed portions, and the traction member is passed through the second lumen.
[0021] Exemplarily, the interventional catheter also has a head end tube, which is connected to the curved hose section, and the end of the traction member away from the force application end is connected to the head end tube, and the force application end extends out of the end of the supporting hose section away from the head end tube.
[0022] Exemplarily, a hard transition section is arranged between the head end tube and the curved hose section, and the hard transition section has a fourth connection end and a fifth connection end, the fourth connection end is connected to the head end tube, and the fifth connection end is connected to the curved hose section, and the stiffness of the hard transition section is gradually changed from the fourth connection end to the fifth connection end.
[0023] According to another aspect of the utility model, an ultrasonic imaging device is provided, which includes an operating handle and the interventional catheter as described above, wherein the force application end is connected to the operating handle, and the position and / or angle of the interventional catheter is adjusted by the operating handle.
[0024] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the detailed implementation section. The utility model content section does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.
[0025] The advantages and features of the present invention are described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the implementation of the present invention and its description, and are used to explain the principle of the present invention. In the drawings,
[0027] Figure 1 It is a schematic structural diagram of an interventional catheter of an exemplary embodiment of the utility model;
[0028] Figure 2 for Figure 1 A schematic diagram of the local structure of the interventional catheter is shown;
[0029] Figure 3 For Figure 2 a schematic diagram of a metal tube body of an exemplary embodiment shown;
[0030] Figure 4 For Figure 3 an enlarged view of part A in;
[0031] Figure 5 For Figure 1 a reference of the usage state of the interventional catheter shown Figure 1 ;
[0032] Figure 6 For Figure 2 a schematic diagram of a metal tube body of another exemplary embodiment shown;
[0033] Figure 7 For Figure 1 a reference of the usage state of the interventional catheter shown Figure 2 ;
[0034] Figure 8 For Figure 2 a schematic diagram of a metal tube body of still another exemplary embodiment shown;
[0035] Figure 9 For Figure 2 a schematic diagram of a metal tube body of yet another exemplary embodiment shown;
[0036] Figure 10 For Figure 1 a cross-sectional view of an exemplary embodiment of the interventional catheter shown;
[0037] Figure 11 For Figure 1 a cross-sectional view of another exemplary embodiment of the interventional catheter shown.
[0038] Among them, the above-mentioned drawings include the following reference numerals:
[0039] 10, interventional catheter; 100, metal tube body; 101, first end; 102, second end; 110, bending hose section; 111, far end; 120, support hose section; 121, third connection end; 130, transition section; 131, first connection end; 132, second connection end; 200, inner tube body; 210, first through hole; 211, first cavity; 220, second through hole; 221, second cavity; 230, first cavity tube; 240, second cavity tube; 250, recessed part; 300, outer tube body; 400, adhesive layer; 500, braided layer; 600, traction member; 700, head end tube; 800, rigid transition section; 801, fourth connection end; 802, fifth connection end. Detailed implementation manners
[0040] In the following description, a large number of details are provided to enable a thorough understanding of the present utility model. However, those skilled in the art can understand that the following description only exemplarily shows the preferred embodiments of the present utility model, and the present utility model can be implemented without one or more such details. In addition, to avoid confusion with the present utility model, some well-known technical features in the art are not described in detail.
[0041] To thoroughly understand the embodiments of the present utility model, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present utility model is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present utility model are described in detail below. However, in addition to these detailed descriptions, the present utility model can also have other embodiments.
[0042] Embodiments of the present utility model provide an interventional catheter. The interventional catheter can be applied to various types of devices, including but not limited to being applied to ultrasonic imaging devices, etc., such as being applied to intracardiac ultrasonic imaging devices, intravascular ultrasonic devices. The following will introduce in detail an interventional catheter according to an embodiment of the present utility model in conjunction with the accompanying drawings.
[0043] Referring to Figures 1 to 3 , the interventional catheter 10 can include a metal tube body 100, an inner layer tube body 200, and a traction member 600. The metal tube body 100 can be sleeved outside the inner layer tube body 200. The outer wall surface of the metal tube body 100 can have spiral cutting grooves. From the first end 101 to the second end 102 of the metal tube body 100, the pitch of at least one segment of the spiral cutting grooves is gradually changed, and / or the groove width of at least one segment of the spiral cutting grooves is gradually changed. The metal tube body 100 can be a Hypotube. The traction member 600 can pass through the inner layer tube body 200 and have a force application end extending outside the second end 102.
[0044] As Figure 4 , define the pitch of the spiral cutting grooves on the metal tube body 100 as P, and the groove width of the spiral cutting grooves as L. The pitch refers to the axial distance between adjacent threads when the threads of the spiral groove rotate one week. The groove width refers to the axial distance between the two sides of a thread groove on the thread profile at the pitch diameter. It should be noted that the pitch and the groove width of one segment of the spiral cutting grooves on the metal tube body 100 can both be gradually changed, or one can be gradually changed while the other remains unchanged. The changing rules of the pitch and the groove width can satisfy an arithmetic progression change. And in order to meet the supportability and pushability of the metal tube body 100, the common difference of the pitch can be greater than the common difference of the groove width.
[0045] Further, the pitch and groove width of at least one section of spiral cutting grooves are gradually changed. The pitch and groove width between each thread may be different, or several adjacent threads may be grouped together, with the pitch and groove width being the same within the same group and different between groups.
[0046] For the interventional catheter 10 of the present utility model, since spiral cutting grooves are formed on the metal tube body 100, the gradual change of the pitch and / or groove width of the spiral cutting grooves realizes the gradual change of the stiffness of the metal tube body 100, which not only enhances the flexibility of the metal tube body 100 but also meets the supportability and pushability of the metal tube body 100. Combined with the setting that the inner tube body 200 is penetrated with the traction member 600, applying a force to the force application end of the traction member 600 can actively bend and adjust the entire interventional catheter 10, thereby increasing the bending degree of the interventional catheter 10 in different directions, and further meeting the maneuverability required during operation. In addition, when using the interventional catheter 10, it can also be bent passively under the action of obstacles in the cavity.
[0047] With reference to Figure 1 and Figure 3 , the metal tube body 100 may include a bent flexible hose section 110 and a support flexible hose section 120. The bent flexible hose section 110 may be close to the first end 101. The first end 101 may be close to the insertion end of the interventional catheter 10. The support flexible hose section 120 may be close to the second end 102. The second end 102 may be farther from the insertion end than the first end 101. The stiffness of the support flexible hose section 120 may be greater than that of the bent flexible hose section 110. With such a setting, the bent flexible hose section 110 has good flexibility, and the support flexible hose section 120 has good supportability and pushability, thus meeting the maneuverability required by the operator during use. Since the interventional catheter 10 usually has a certain length, in order to meet the maneuverability required by the operator during use, the length of the support flexible hose section 120 may be greater than that of the bent flexible hose section 110.
[0048] In an embodiment of the present utility model, with reference to Figure 3 and Figure 5, the bent hose section 110 and the support hose section 120 can be connected. From the first end 101 to the second end 102, at least one of the pitch and the groove width of the spiral cutting groove can be gradually changed. For example, from the first end 101 to the second end 102, the pitch of the spiral cutting groove gradually increases, and the groove width of the spiral cutting groove gradually increases; or from the first end 101 to the second end 102, the pitch of the spiral cutting groove gradually decreases, and the groove width of the spiral cutting groove gradually decreases; or from the first end 101 to the second end 102, the pitch of the spiral cutting groove gradually increases, and the groove width of the spiral cutting groove remains unchanged. The bent hose section 110 of the intervention catheter 10 can form a shape similar to a "fishhook" when bent. With such a setting, by the gradual change of the stiffness of the metal tube body 100, the bending degree of the intervention catheter 10 in different directions is increased, so that the intervention catheter 10 is suitable for scenarios where a larger bending degree is required. Of course, the case where the pitch and the groove width of the spiral cutting groove are equal from the first end 101 to the second end 102 is not excluded.
[0049] In another embodiment of the present utility model, with reference to Figures 6 to 8 , the bent hose section 110 can have a distal end 111 away from the first end 101. From the first end 101 to the distal end 111, the pitch of the spiral cutting groove can be equal, and the groove width of the spiral cutting groove can be equal. At this time, the bent hose section 110 will bend uniformly and can form a shape close to an arc when bent. With such a setting, the intervention catheter 10 is suitable for scenarios where uniform bending is required.
[0050] Refer to Figure 6, the metal tube body 100 may also have a transition section 130. The transition section 130 may have a first connection end 131 and a second connection end 132. The first connection end 131 may be connected to the bent hose section 110. The second connection end 132 may be connected to the support hose section 120. From the first connection end 131 to the second connection end 132, the pitch of the spiral cutting groove may gradually increase from P1 to P2, and the groove width of the spiral cutting groove may be equal; where P1 is the pitch of the spiral cutting groove at the connection with the first connection end 131 on the bent hose section 110, and P2 is the pitch of the spiral cutting groove at the connection with the second connection end 132 on the support hose section 120. The pitch of a small section where the first connection end 131 is connected to the bent hose section 110 may be equal or gradually change, and the pitch of a small section where the second connection end 132 is connected to the support hose section 120 may be equal or gradually change. For the case where the pitch at the connection of the first connection end 131 and the bent hose section 110 gradually changes and the pitch at the connection of the second connection end 132 and the support hose section 120 also gradually changes, the overall stiffness of the transition section 130 and the support hose section 120 can be gradually changed. The groove width of the spiral cutting groove on the transition section 130 may be equal to the groove width of the spiral cutting groove on the bent hose section 110. It can be understood that the minimum pitch of the spiral cutting groove on the transition section 130 is greater than the pitch of the spiral cutting groove on the bent hose section 110. In this way, by setting the transition section 130, the stiffness gradual connection between the support hose section 120 and the bent hose section 110 can be achieved.
[0051] The support hose section 120 may have a third connection end 121 connected to the second connection end 132. From the third connection end 121 to the second end 102, the pitch of the spiral cutting groove may gradually increase. It can be understood that the minimum pitch of the spiral cutting groove on the support hose section 120 is greater than the maximum pitch of the spiral cutting groove on the transition section 130. With such a setting, the flexibility of the support hose section 120 is increased, and the required support and pushing properties of the support hose section 120 are satisfied. In addition, the groove width of the spiral cutting groove on the support hose section 120 may be gradually changed or equal.
[0052] See Figure 8, the metal pipe body 100 may further have a transition section 130, and the transition section 130 may have a first connection end 131 and a second connection end 132. The first connection end 131 may be connected to the bent hose section 110, and the second connection end 132 may be connected to the support hose section 120. From the first connection end 131 to the second connection end 132, the groove width L1 of the spiral cutting groove may gradually decrease to L2, and the pitch of the spiral cutting groove may be equal; wherein, L1 is the groove width of the spiral cutting groove at the connection with the first connection end 131 on the bent hose section 110, and L2 is the groove width of the spiral cutting groove at the connection with the second connection end 132 on the support hose section 120. The groove widths of a small section where the first connection end 131 is connected to the bent hose section 110 may be equal or may gradually change, and the groove widths of a small section where the second connection end 132 is connected to the support hose section 120 may be equal or may gradually change. For the case where the groove width gradually changes at the connection between the first connection end 131 and the bent hose section 110 and the groove width also gradually changes at the connection between the second connection end 132 and the support hose section 120, a gradual change in the overall stiffness between the transition section 130 and the support hose section 120 can be achieved. The pitch of the spiral cutting groove on the transition section 130 may be equal to the pitch of the spiral cutting groove on the bent hose section 110. It can be understood that the maximum groove width of the spiral cutting groove on the transition section 130 is smaller than the groove width of the spiral cutting groove on the bent hose section 110. In this way, by providing the transition section 130, a gradual change in stiffness connection between the support hose section 120 and the bent hose section 110 is achieved.
[0053] The support hose section 120 may have a third connection end 121 connected to the second connection end 132. From the third connection end 121 to the second end 102, the groove width of the spiral cutting groove may gradually decrease from L2. It can be understood that the maximum groove width of the spiral cutting groove on the support hose section 120 is smaller than the minimum groove width of the spiral cutting groove on the transition section 130. With such a setting, the required supportability and pushability of the support hose section 120 are satisfied. In addition, the pitch of the spiral cutting groove on the support hose section 120 may be gradually changing or equal.
[0054] Of course, from the first connection end 131 to the second connection end 132, the groove width L1 of the spiral cutting groove may gradually increase to L2, and from the third connection end 121 to the second end 102, the groove width of the spiral cutting groove may gradually increase from L2, and the pitch of the spiral cutting groove may be equal. It should be noted that in order to satisfy the supportability and pushability of the support hose section 120, although the groove width of the spiral cutting groove on the support hose section 120 gradually increases, the width of its maximum groove width is still at a relatively small value.
[0055] In an embodiment not shown, at least one of the pitch and the groove width of the spiral cutting groove on the transition section 130 may be gradually changing.
[0056] Refer toFigure 6 and Figure 8 The length of the transition section 130 can be less than that of the bent hose section 110. With such a setting, it is avoided that the length of the transition section 130 is greater than that of the bent hose section 110, thereby affecting the supportability and pushability of the support hose section 120. In an embodiment not shown, the length of the transition section 130 can be equal to that of the bent hose section 110.
[0057] Referring to Figure 1 and Figure 3 The outer diameter of the metal tube body 100 can be constant from the first end 101 to the second end 102. In this way, the interventional catheter 10 can have a certain degree of curvature and ensure the consistency of the outer diameter of the interventional catheter 10. Referring to Figure 1 and Figure 9 The outer diameter of the metal tube body 100 can gradually increase from the first end 101 to the second end 102. In this way, the curvature of the interventional catheter 10 is increased by the change of the outer diameter of the metal tube body 100.
[0058] Referring to Figure 1 , Figure 2 , Figure 10 and Figure 11 The interventional catheter 10 may further include an outer tube body 300 and a braided layer 500. The inner tube body 200, the metal tube body 100, the braided layer 500 and the outer tube body 300 can be sequentially connected from the inside out to form a flexible hose. The material of the inner tube body 200 can be a polymer material, including but not limited to PTFE (Polytetrafluoroethylene, abbreviated as PTFE, PTFE is a polymer obtained by polymerizing tetrafluoroethylene as a monomer), Pebax (PEBAX is a high-performance polymer, commonly known as nylon elastomer, which has the characteristics of both thermoplastic plastics and rubbers), PA (PA material is polyamide material, also known as nylon, which is a synthetic polymer material), etc. The inner tube body 200, the metal tube body 100, the braided layer 500 and the outer tube body 300 can be connected by bonding. For example, the metal tube body 100 and the inner tube body 200 are connected by coating an adhesive layer 400, and the metal tube body 100 and the outer tube body 300 are connected by coating an adhesive layer 400. The braided layer 500 can be formed by braiding stainless steel wires. Of course, it does not exclude being braided by other linear materials. The stiffness gradient can be partially adjusted by changing the configuration of the braided layer 500 (for example, changing the PIC count, wire diameter, or wire pitch of the braid). In this way, under the combined adjustment of the metal tube body 100, the inner tube body 200, the outer tube body 300 and the braided layer 500, the adjustment range of the stiffness gradient of the interventional catheter 10 is wider, so that the applicable interventional catheter 10 can be selected according to different usage scenarios.
[0059] Referring to Figure 1 ,Figure 3 , Figure 10 and Figure 11 , the outer tube body 300 may have a third end corresponding to the first end 101 and a fourth end corresponding to the second end 102. From the third end to the fourth end, the stiffness of the outer tube body 300 may be gradually changed. Different materials may be used on the outer tube body 300, which may be polymer materials, including but not limited to materials such as PTFE, Pebax, PA, and composite carbon fiber. From the third end to the fourth end, the thickness of the outer tube body 300 may be different, or even gradually changed. The outer tube body 300 may have a gradually changed stiffness by using different materials or polymer tubes with different thicknesses. Different outer tube bodies 300 use different materials or polymer tubes with different thicknesses, and their stiffnesses are different. Thus, under the combined adjustment of the metal tube body 100, the inner tube body 200, the outer tube body 300, and the braided layer 500, the adjustment range of the gradually changed stiffness of the interventional catheter 10 is wider, so that the applicable interventional catheter 10 can be selected according to different usage scenarios.
[0060] Referring to Figure 1 , Figure 3 and Figure 10 , a first through hole 210 and a plurality of second through holes 220 may be provided on the inner tube body 200. The first through hole 210 may penetrate from one end of the inner tube body 200 to the other end and form a first cavity 211 in the middle of the inner tube body 200. The second through holes 220 may penetrate from one end of the inner tube body 200 to the other end and form second cavities 221 at positions on the inner tube body 200 far from the center position of the inner tube body 200. The traction member 600 may be disposed through the second cavities 221. The inner tube body 200 may be a multi-cavity tube. Specifically, one first through hole 210 and four second through holes 220 may be provided on the inner tube body 200. One first through hole 210 forms one first cavity 211, and four second through holes 220 form four second cavities 221. Thus, the inner tube body 200 forms a tube body with one large cavity and four small cavities. The traction member 600 may be disposed through the four second cavities 221. When one of the two second cavities 221 in the diagonal positions is bent by the traction of the traction member 600, the bent hose section 110 and the support hose section 120 are bent in the corresponding direction. The inner tube body 200 has multiple cavities, so the hardness of the tube body is large. Thus, the inner tube body 200 has a relatively large stiffness, and the interventional catheter 10 having the inner tube body 200 can be applicable to environments requiring strong support and pushing performance.
[0061] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 11The inner tube body 200 may include a first lumen 230 and a plurality of second lumen 240. The outer periphery of the first lumen 230 may be recessed toward the center of the inner tube body 200 to form a plurality of recessed portions 250. The plurality of second lumen 240 and the plurality of recessed portions 250 may correspond to each other one by one and be located in the respective corresponding recessed portions 250. The traction member 600 may be disposed through the second lumen 240. The inner tube body 200 can be composed of a plurality of tube bodies. Specifically, the inner tube body 200 can include a first lumen 230 and four second lumen 240. The outer periphery of the first lumen 230 is recessed toward the center of the inner tube body 200 to form four recessed portions 250. The four second lumen 240 corresponds to the four recessed portions 250 one by one and is located in the corresponding recessed portions 250. Thus, the inner tube body 200 is composed of a large single lumen tube and four small single lumen tubes. The traction member 600 can be passed through the four small single lumen tubes. When one of the two small single lumen tubes in diagonal positions is pulled and bent by the traction member 600, the bent hose segment 110 and the supporting hose segment 120 bend in the corresponding direction. The hardness of the inner tube body 200 with multiple tubes is lower than the hardness of the inner tube body 200 with multiple cavities, and based on the current technology, the diameter of the inner tube body 200 with multiple tubes can be smaller than the diameter of the inner tube body 200 with multiple cavities, so that the inner tube body 200 is relatively soft, and the interventional catheter 10 with the inner tube body 200 can be applied to complex and twisted tube cavity environments. The inner tube body 200 with lower stiffness cooperates with the metal tube body 100 with gradually changing stiffness, so that the stiffness of the interventional catheter 10 can be adjusted in a larger range, which is convenient for flexible position and angle adjustment in the tube cavity.
[0062] Again, refer to Figures 1 to 3 , the interventional catheter 10 may also have a head end tube 700. The head end tube 700 may be connected to the curved hose section 110. One end of the traction member 600 away from the force application end may be connected to the head end tube 700, and the force application end may extend out of the end of the support hose section 120 away from the head end tube 700. In this way, the traction member 600 drives the curved hose section 110 and the support hose section 120 to bend, so as to achieve ultrasonic profile inspection from different perspectives. The head end tube 700 and the curved hose section 110 may be connected together by welding or pasting. The head end tube 700, the curved hose section 110 and the support hose section 120 may also be injection molded into one piece. The traction member 600 may be a steel wire, but is not limited to other metal or non-metallic filamentary structures. The traction member 600 may be fixed to the head end tube 700 by pasting or bundling.
[0063] Again, refer to Figure 1 and Figure 3, a rigid transition section 800 may be provided between the head end tube 700 and the curved hose section 110. The rigid transition section 800 may have a fourth connection end 801 and a fifth connection end 802. The fourth connection end 801 may be connected to the head end tube 700. The fifth connection end 802 may be connected to the curved hose section 110. From the fourth connection end 801 to the fifth connection end 802, the stiffness of the rigid transition section 800 is gradually changed. Preferably, from the fourth connection end 801 to the fifth connection end 802, the stiffness of the rigid transition section 800 is gradually decreased. Thus, by providing the rigid transition section 800, a gradual transition in stiffness between the curved hose section 110 and the head end tube 700 is achieved.
[0064] According to another aspect of the present invention, an ultrasonic imaging device is provided. The ultrasonic imaging device includes an operation handle and the interventional catheter 10 as described above. The force application end is connected to the operation handle. A user can apply a force to the force application end through the operation handle, so that the position and / or angle of the interventional catheter 10 can be adjusted through the operation handle. 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 elaborated herein one by one.
[0065] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front", "rear", "upper", "lower", "left", "right", "lateral", "vertical", "perpendicular", "horizontal" and "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 invention and simplifying the description. Without contrary description, these orientation words 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 cannot be understood as a limitation to the protection scope of the present invention; the orientation words "inner" and "outer" refer to the inside and outside relative to the contour of each component itself.
[0066] For ease of description, regional relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the regional positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that regional relative terms not only include the orientation of the components described in the figures, but also different orientations during use or operation. For example, if the components in the attached 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 orientations of "above" and "below". In addition, these components or features can also be positioned at other different angles (such as rotated 90 degrees or other angles), and this document intends to cover all such situations.
[0067] 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.
[0068] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that the data used in this way 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.
[0069] The present utility model has been illustrated by the above embodiments. However, it should be understood that the above embodiments are only for the purpose of exemplification and illustration, and are not intended to limit the present utility model within 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 all these variations and modifications 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, characterized in that: It includes a metal tube body, an inner tube body and a traction member, wherein the metal tube body is sleeved on the inner tube body, and the outer wall surface of the metal tube body is provided with a spiral cutting groove. From the first end to the second end of the metal tube body, the pitch of at least one section of the spiral cutting groove is gradually changing, and / or the groove width of at least one section of the spiral cutting groove is gradually changing. The traction member is passed through the inner tube body and has a force application end extending out of the second end.
2. The interventional catheter according to claim 1, characterized in that: The metal pipe body comprises a curved hose section and a supporting hose section, the curved hose section is close to the first end, the supporting hose section is close to the second end, and the rigidity of the supporting hose section is greater than the rigidity of the curved hose section.
3. The interventional catheter according to claim 2, characterized in that: The curved hose section is connected to the supporting hose section, and from the first end to the second end, the pitch of the spiral cutting groove is gradually changed, and / or the groove width of the spiral cutting groove is gradually changed.
4. The interventional catheter according to claim 2, characterized in that: The curved hose section has a distal end distal from the first end, and from the first end to the distal end, the pitches of the spiral cutting grooves are equal, and the groove widths of the spiral cutting grooves are equal.
5. The interventional catheter according to any one of claims 2 to 4, characterized in that: The metal tube body further has a transition section, and the transition section has a first connection end and a second connection end, the first connection end is connected to the curved hose section, and the second connection end is connected to the supporting hose section.
6. The interventional catheter according to claim 5, characterized in that: From the first connection end to the second connection end, the pitch of the spiral cutting groove gradually increases from P1 to P2, and the groove width of the spiral cutting groove is equal; wherein P1 is the pitch of the spiral cutting groove at the connection between the curved hose section and the first connection end, and P2 is the pitch of the spiral cutting groove at the connection between the supporting hose section and the second connection end.
7. The interventional catheter according to claim 6, characterized in that: The supporting hose section has a third connecting end connected to the second connecting end, and the pitch of the spiral cutting groove gradually increases from P2 from the third connecting end to the second end.
8. The interventional catheter according to claim 5, characterized in that: From the first connection end to the second connection end, the groove width of the spiral cutting groove gradually decreases from L1 to L2, and the pitch of the spiral cutting groove is equal; wherein L1 is the groove width of the spiral cutting groove at the connection between the curved hose section and the first connection end, and L2 is the groove width of the spiral cutting groove at the connection between the supporting hose section and the second connection end.
9. The interventional catheter according to claim 8, characterized in that: The supporting hose section has a third connecting end connected to the second connecting end, and the groove width of the spiral cutting groove gradually decreases from L2 from the third connecting end to the second end.
10. The interventional catheter according to claim 5, characterized in that: The length of the transition section is less than or equal to the length of the curved hose section.
11. The interventional catheter according to claim 1, characterized in that: The outer diameter of the metal tube body is constant or gradually increases from the first end to the second end.
12. The interventional catheter according to claim 1, characterized in that: The interventional catheter also includes an outer tube body and a braided layer. The inner tube body, the metal tube body, the braided layer and the outer tube body are sequentially connected from inside to outside to form a flexible hose.
13. The interventional catheter according to claim 12, characterized in that: The outer tube body has a third end corresponding to the first end and a fourth end corresponding to the second end, and the stiffness of the outer tube body changes gradually from the third end to the fourth end.
14. The interventional catheter according to claim 1, characterized in that: The inner tube body is provided with a first through hole and a plurality of second through holes, the first through hole penetrates from one end of the inner tube body to the other end and forms a first cavity in the middle of the inner tube body, the second through hole penetrates from one end of the inner tube body to the other end and forms a second cavity on the inner tube body away from the center of the inner tube body, and the traction member is passed through the second cavity.
15. The interventional catheter according to claim 1, characterized in that: The inner tube body includes a first lumen and multiple second lumens. The outer periphery of the first lumen is recessed toward the center of the inner tube body to form multiple recessed portions. The multiple second lumens correspond to the multiple recessed portions one by one and are located in the corresponding recessed portions. The traction member is passed through the second lumen.
16. The interventional catheter according to claim 2, characterized in that: The interventional catheter also has a head end tube, which is connected to the curved hose section; the end of the traction member away from the force application end is connected to the head end tube, and the force application end extends out of the end of the support hose section away from the head end tube.
17. The interventional catheter according to claim 16, characterized in that: A hard transition section is arranged between the head end tube and the curved hose section, and the hard transition section has a fourth connection end and a fifth connection end, the fourth connection end is connected to the head end tube, and the fifth connection end is connected to the curved hose section, and the stiffness of the hard transition section is gradually changed from the fourth connection end to the fifth connection end.
18. An ultrasonic imaging device, characterized in that: It comprises an operating handle and an interventional catheter as described in any one of claims 1 to 17, wherein the force application end is connected to the operating handle, and the position and / or angle of the interventional catheter is adjusted by the operating handle.