Guide catheter
By designing a guide catheter that includes a seat, an injection tube, a metal wire, and an anchoring part, the problem of catheter reversal caused by insufficient support and heartbeat during PCI surgery was solved. This achieved stable catheter fixation and accurate delivery of medical devices, improving the safety and success rate of the surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-04-03
AI Technical Summary
During PCI surgery, the guiding catheter may move in the opposite direction within the blood vessel due to insufficient support or heartbeat, affecting the quality and safety of the procedure.
A guiding catheter was designed, comprising a tube seat, an injection tube, a metal wire, an extension tube, and an anchoring part. The anchoring part expands radially in a swollen state to fix the extension tube, providing stable support and preventing catheter displacement.
This improves the stability and safety of the surgical procedure, ensures that medical devices are accurately delivered to their intended locations, reduces potential damage to blood vessels, and increases the success rate of the surgery.
Smart Images
Figure CN224070944U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and in particular to a guiding catheter. Background Technology
[0002] With the continuous development of vascular disease treatment technologies, interventional therapy has gradually become the mainstream and has achieved satisfactory clinical results. In recent years, with the improvement of interventional techniques and instruments, especially the advent of guiding catheters, the success rate and long-term prognosis of interventional treatment for complex vascular lesions have been significantly improved, while complications have been significantly reduced. It can be said that as interventional surgeons improve their surgical skills and continue to tackle severe and complex lesions, the role of guiding catheters has become increasingly important.
[0003] However, during PCI procedures, the guiding catheter often shifts backward within the blood vessel due to insufficient support or cardiac activity, severely impacting the quality of the procedure. Therefore, a solution is needed to provide strong support for the guiding catheter and address this migration problem. Utility Model Content
[0004] The purpose of this application is to provide a guiding catheter that can be directly anchored inside the guiding catheter to prevent displacement of the guiding catheter.
[0005] Therefore, this application provides a guiding catheter, comprising: a tube seat; an injection tube connected to the tube seat, the diameter of the end of the injection tube away from the tube seat being adjustable; a metal wire disposed axially within the injection tube, one end of the metal wire being connected to the tube seat; an extension tube connected to the injection tube, the injection tube being inserted into the body of the extension tube; and an anchoring portion disposed on the extension tube for anchoring the extension tube; wherein, when the anchoring portion is in a contracted state, a medical device can pass through the anchoring portion within the extension tube; when the anchoring portion is in a swollen state, the anchoring portion expands radially along the extension tube, abutting against the anchoring position to anchor the extension tube.
[0006] In one possible implementation, the extension tube sequentially includes a first tube body, a second tube body, and a third tube body, with the anchoring portion disposed on the first tube body.
[0007] In one possible implementation, the anchoring part is a balloon disposed on the first tube body; wherein, when the balloon is in a contracted state, the medical device can pass through the extension tube through the balloon; when the balloon is in an inflated state, the balloon expands radially along the first tube body and abuts against the anchoring position to anchor the extension tube.
[0008] In one possible implementation, the end of the third tube away from the second tube is configured as a tapered tip, which is radiolucent.
[0009] In one possible implementation, the hardness of the extension tube decreases sequentially from the first tube body to the third tube body.
[0010] In one possible implementation, the first tube is constructed radially from the inside out as an inner liner, a metal layer, and a first outer tube layer.
[0011] In one possible implementation, the adjustable end of the injection tube is inserted between the metal layer and the first outer tube layer.
[0012] In one possible implementation, the second tube is constructed radially from the inside out as an inner liner, a metal layer, and a second outer tube layer.
[0013] In one possible implementation, the third tube is constructed radially from the inside out as an inner liner, a metal layer, and a third outer tube layer.
[0014] In one possible implementation, the balloon is constructed radially from the inside out as a medium-hardness low-elasticity layer, a high-hardness low-elasticity layer, and a low-hardness high-elasticity layer.
[0015] The guiding catheter provided in this application is designed to effectively solve problems caused by insufficient support or cardiac activity during PCI surgery, specifically, the guiding catheter moving in the opposite direction within the blood vessel. The guiding catheter provided in this application significantly improves stability during surgery, ensuring the medical device is safely and accurately delivered to the intended location while minimizing potential damage to blood vessels, thereby improving the safety and success rate of the surgery. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In addition, in the drawings, the same parts use the same reference numerals, and the drawings are not drawn to scale.
[0017] Figure 1 This diagram illustrates the structure of the guiding catheter in its unfilled state according to an embodiment of this application.
[0018] Figure 2 This application provides an embodiment of the invention. Figure 1Sectional view along line AA;
[0019] Figure 3 This illustration shows a schematic diagram of the guiding catheter in its filled state according to an embodiment of this application.
[0020] Figure 4 This application provides an embodiment of the invention. Figure 3 Sectional view along the BB direction;
[0021] Figure 5 This diagram illustrates the structure of the first tube provided in an embodiment of this application.
[0022] Figure 6 This diagram illustrates the structure of the second tube provided in an embodiment of this application.
[0023] Figure 7 This is a schematic diagram of the structure of the third tube provided in an embodiment of this application.
[0024] Explanation of reference numerals in the attached figures:
[0025] 1. Tube seat;
[0026] 2. Injection tube;
[0027] 3. Fine metal wire;
[0028] 4. Extension tube; 41. First tube body; 411. First outer tube layer; 42. Second tube body; 421. Second outer tube layer; 43. Third tube body; 431. Third outer tube layer;
[0029] 5. Anchoring part; 51. Medium hardness low elasticity layer; 52. High hardness low elasticity layer; 53. Low hardness high elasticity layer;
[0030] 100. Inner lining layer;
[0031] 200. Metal layer. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0033] During percutaneous coronary intervention (PCI), the guiding catheter often moves unintended in the blood vessel due to insufficient support or the heart's beating, severely impacting the quality and outcome of the procedure. Therefore, there is an urgent need for a solution that provides more stable support for the guiding catheter to address this issue of unnecessary movement during the procedure.
[0034] To address the aforementioned issues, embodiments of this application propose a guiding catheter. This guiding catheter possesses a unique anchoring mechanism, allowing for direct anchoring within the catheter itself, effectively preventing unintended displacement during surgery. This ensures that medical devices such as balloon catheters and stents are safely and accurately delivered to their intended locations, enabling effective vascular dilation or stent implantation. Furthermore, this design minimizes potential damage to the blood vessel wall, reducing the risk of surgical complications and significantly improving surgical safety and success rates.
[0035] Specifically, such as Figure 1 and Figure 3 As shown, this application embodiment provides a guiding catheter, including a tube seat 1, an injection tube 2, a metal wire 3, an extension tube 4, and an anchoring part 5. The injection tube 2 is connected to the tube seat 1, and the diameter of the end of the injection tube 2 away from the tube seat 1 is adjustable. The metal wire 3 is arranged axially within the injection tube 2, and one end of the metal wire 3 is connected to the tube seat 1. The extension tube 4 is connected to the injection tube 2, and the injection tube 2 is inserted into the body of the extension tube 4. The anchoring part 5 is disposed on the extension tube 4 and can be used to anchor the extension tube 4. When the anchoring part 5 is in a contracted state, the medical device can pass through the extension tube 4 through the anchoring part 5. When the anchoring part 5 is in a swollen state, the anchoring part 5 expands radially along the extension tube 4, abutting against the anchoring position to anchor the extension tube 4.
[0036] In a specific embodiment of this application, a guiding catheter is described in detail. This guiding catheter comprises several key components, including a base 1, an injection tube 2, a metal wire 3, an extension tube 4, and an anchoring portion 5. First, the injection tube 2 is tightly connected to the base 1, ensuring the stability of the overall structure. Specifically, the end of the injection tube 2 furthest from the base 1 is designed with an adjustable diameter to accommodate different medical needs. The metal wire 3 is precisely positioned inside the injection tube 2 along its axial direction, with one end firmly connected to the base 1, ensuring the stability of the metal wire 3 during use. Furthermore, the extension tube 4 is connected to the injection tube 2, allowing the injection tube 2 to smoothly penetrate the body of the extension tube 4, facilitating medical procedures. The anchoring portion 5 is cleverly positioned at an appropriate location on the extension tube 4, its main function being to anchor the extension tube 4, ensuring the stability and accuracy of the extension tube 4 during medical procedures. More specifically, when the anchoring portion 5 is in a retracted state, the medical device can easily move freely within the extension tube 4 through the anchoring portion 5 to perform necessary medical procedures. When the anchoring part 5 is in a full state, it expands along the radial direction of the extension tube 4, effectively abutting and fixing itself at a specific anchoring position, thereby ensuring the stability and accuracy of the extension tube 4 in medical operations.
[0037] In one possible implementation, the extension tube 4 sequentially includes a first tube body 41, a second tube body 42, and a third tube body 43, with the anchoring part 5 disposed on the first tube body 41.
[0038] In specific embodiments of this application, such as Figure 1 and Figure 3 As shown, the extension tube 4 sequentially includes a first tube body 41, a second tube body 42, and a third tube body 43, which are connected in sequence to form a continuous extension structure. In this structure, in particular, the anchoring part 5 is positioned at a specific location on the first tube body 41 to provide a stable fixing point in practical applications. It should be noted that the anchoring part 5 is made of a highly flexible and elastic material to avoid causing injury to the human body.
[0039] In one possible implementation, the anchoring part 5 is a balloon disposed on the first tube body 41; wherein, when the balloon is in a contracted state, the medical device can pass through the extension tube 4 through the balloon; when the balloon is in an inflated state, the balloon expands radially along the first tube body 41 and abuts against the anchoring position to anchor the extension tube 4.
[0040] In specific embodiments of this application, such as Figure 2 As shown, when the balloon is in a contracted state, the medical device can freely pass through the extension tube 4 via the balloon; as Figure 4As shown, when the balloon is inflated, it expands radially along the first tube 41 and abuts against the anchoring position to securely anchor the extension tube 4. This design allows the medical device to pass easily through the balloon when needed, and when a fixed position is required, the balloon is inflated and firmly anchored at a specific location, thereby ensuring the stability and accuracy of the medical device's operation within the body.
[0041] Furthermore, the balloon anchoring design takes into account the selection of balloon materials to ensure its biocompatibility and durability in the in vivo environment. Balloons are typically made of soft yet strong materials, such as polyurethane or silicone rubber, which provide sufficient support when inflated while easily passing through narrow blood vessels or cavities when deflated. Additionally, the inflation and deflation of the balloon can be controlled via an attached catheter, which can be stand-alone or integrated into the main body of the medical device.
[0042] In one possible implementation, the end of the third tube 43 away from the second tube 42 is configured as a tapered tip, which is radiopaque.
[0043] In specific embodiments of this application, such as Figure 1 and Figure 3 As shown, the end of the third tube 43 furthest from the second tube 42 is constructed with a tapered tip. This tapered tip design not only has practical functionality but also provides radioactivity. The radioactivity of the tapered tip means that it can display or record information in some way, perhaps by changing color, emitting light, or through other visual effects. This design makes the third tube 43 more intuitive to observe and easily identify disease areas in practical applications, thereby improving the convenience and accuracy of operation.
[0044] The radiopaque design of the tapered tip allows the third tube 43 to provide clearer visual guidance during precision operations. For example, in medical surgery or precision assembly, the radiopaque properties of the tapered tip can help doctors or engineers accurately locate the tube, thereby improving the precision and safety of the operation.
[0045] In one possible implementation, the hardness of the extension tube 4 decreases sequentially from the first tube body 41 to the third tube body 43.
[0046] In specific embodiments of this application, this design allows the extension tube 4 to have different physical properties at different locations to adapt to different usage requirements and environmental conditions. For example, the first tube 41 may require higher stiffness to provide sufficient support, while the third tube 43 may require lower stiffness to provide better flexibility and adaptability. This gradual stiffness design allows the extension tube 4 to better adapt to various complex environments while maintaining overall structural strength.
[0047] Furthermore, by adjusting the stiffness of each part of the extension tube 4, the mechanical properties of the entire system can be optimized. For example, using a harder material at the first tube body 41 ensures that the extension tube 4 will not easily deform or be damaged when subjected to greater resistance. Using a softer material at the third tube body 43 helps reduce potential damage to the lesion area. This design not only improves the stability of the extension tube 4 but also enhances its reliability.
[0048] In one possible implementation, such as Figure 5 As shown, the first tube 41 is constructed radially from the inside out as an inner liner 100, a metal layer 200, and a first outer tube layer 411.
[0049] In a specific embodiment of this application, the inner liner 100 is located at the innermost edge of the pipe body. It is typically made of a corrosion-resistant material to ensure that the medium inside the pipe body does not damage it. Following the inner liner 100 is a metal layer 200, which is typically made of a high-strength metallic material, providing the necessary mechanical strength and structural stability to the pipe body. The outermost layer is the first outer pipe layer 411, which may be made of different materials to adapt to different external environments and usage requirements, such as high-hardness polymer materials.
[0050] Furthermore, this multi-layered design takes into account the issues of thermal expansion and contraction. Since different materials have different coefficients of thermal expansion, the degree of expansion and contraction of each layer will vary with temperature changes. Therefore, the bond between the inner lining layer 100, the metal layer 200, and the first outer tube layer 411 must be sufficiently strong to prevent separation between layers under temperature fluctuations. At the same time, this design also allows the tube body to absorb and adapt to the stress caused by temperature changes to a certain extent, thereby extending the service life of the tube body.
[0051] In one possible implementation, the adjustable end of the injection tube 2 is inserted between the metal layer 200 and the first outer tube layer 411.
[0052] In a specific embodiment of this application, the adjustable end of the injection tube 2 can be flexibly inserted between the metal layer 200 and the first outer tube layer 411 for welding. This design allows medical professionals to adjust the diameter of the injection tube 2 according to the actual application, ensuring a smooth and precise injection process. In this way, resistance during the injection process can be effectively reduced, injection efficiency can be improved, and damage to the metal layer 200 and the outer tube layer can be reduced.
[0053] In one possible implementation, such as Figure 6 As shown, the second tube 42 is constructed radially from the inside out as an inner liner 100, a metal layer 200, and a second outer tube layer 421.
[0054] In a specific embodiment of this application, similar to the first pipe body 41, the inner liner 100 is located at the innermost side of the pipe body. It is typically made of a corrosion-resistant material to protect the interior of the pipe body from chemical corrosion. Following the inner liner 100 is a metal layer 200, which is typically made of a high-strength metallic material to provide sufficient mechanical strength and pressure resistance. The outermost layer is the second outer pipe layer 421, which may be made of different materials to adapt to different external environmental conditions, such as medium-hardness polymer materials. This multi-layered structure design not only improves the overall performance of the pipe body but also provides greater functionality and safety in practical applications. For example, the inner liner 100 can effectively prevent leakage of liquids or gases inside the pipe body, ensuring the purity and safety of the transported medium. The metal layer 200 provides the necessary rigidity and strength to the pipe body, enabling it to withstand pressure. The second outer pipe layer 421 further enhances the flexibility of the pipe body.
[0055] In one possible implementation, such as Figure 7 As shown, the third tube 43 is constructed radially from the inside out as an inner liner 100, a metal layer 200, and a third outer tube layer 431.
[0056] In a specific embodiment of this application, similar to the first tube 41 and the second tube 42, the third tube 43 is constructed radially from the inside out as an inner liner 100, a metal layer 200, and a third outer tube layer 431. This structural design gives the third tube 43 good pressure resistance and corrosion resistance, and the third outer tube layer 431 is made of a low-hardness polymer material. Furthermore, the design of the third tube 43 also takes into account the issues of thermal expansion and contraction. Minor displacements may occur between the inner liner 100, the metal layer 200, and the third outer tube layer 431; therefore, they are typically connected using special adhesives or mechanical methods to ensure that the layers can work together effectively.
[0057] In summary, the hardness of the extension tube 4 decreases gradually from the first tube body 41 to the third tube body 43. This gradual hardness design allows the extension tube 4 to maintain the overall structural strength while also better adapting to the lesion area. The deeper it goes, the softer it becomes, thus avoiding damage to the lesion area.
[0058] In one possible implementation, such as Figure 2 and Figure 4 As shown, the balloon is constructed radially from the inside out as a medium-hardness low-elasticity layer 51, a high-hardness low-elasticity layer 52, and a low-hardness high-elasticity layer 53.
[0059] In a specific embodiment of this application, the balloon's structural design allows it to provide sufficient support during expansion while maintaining a certain degree of flexibility to adapt to different blood vessel shapes and sizes. A medium-rigidity, low-elasticity layer 51, located within the inner layer of the balloon, provides basic support, ensuring that it does not over-inflate during expansion. Next is a high-rigidity, low-elasticity layer 52, which further enhances the balloon's rigidity, enabling it to more effectively push aside the vessel wall during expansion and reducing the risk of vascular injury. The outermost layer is a low-rigidity, high-elasticity layer 53, which gives the balloon good compliance, allowing it to better conform to the vessel wall and provide a uniform pressure distribution, thereby reducing stress concentration on the vessel wall and minimizing the occurrence of complications.
[0060] Furthermore, this multi-layered design of the balloon also takes into account the biocompatibility and durability of the materials. The medium-hardness, low-elasticity layer 51 typically uses a special polymer material that not only has good biocompatibility but also can withstand repeated expansion and contraction without fatigue. The high-hardness, low-elasticity layer 52 may use a more robust material to ensure that the balloon's shape remains unchanged under high pressure, thereby improving the safety of the procedure. The outermost low-hardness, high-elasticity layer 53 may contain additives that can reduce the risk of thrombosis, further optimizing the balloon's clinical performance.
[0061] The guiding catheter provided in this application is designed to effectively solve problems caused by insufficient support or cardiac activity during PCI surgery, specifically, the guiding catheter moving in the opposite direction within the blood vessel. The guiding catheter provided in this application significantly improves stability during surgery, ensuring the medical device is safely and accurately delivered to the intended location while minimizing potential damage to blood vessels, thereby improving the safety and success rate of the surgery.
[0062] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.
[0063] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).
[0064] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.
[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A guide catheter, comprising: The guide catheter comprises: a hub; a syringe connected to the hub, the syringe having a variable diameter at its distal end; a metal filament arranged along the axial direction of the syringe, one end of the metal filament being connected to the hub; an extension tube connected to the syringe, the syringe being inserted into the body of the extension tube; and an anchoring portion arranged on the extension tube and used for anchoring the extension tube. When the anchoring portion is in a contracted state, a medical device can pass through the anchoring portion in the extension tube; when the anchoring portion is in a filled state, the anchoring portion expands radially along the extension tube and is in contact with an anchoring position to anchor the extension tube.
2. The guide catheter according to claim 1, wherein the extension tube sequentially comprises a first tube body, a second tube body and a third tube body, and the anchoring portion is arranged on the first tube body.
3. The guide catheter according to claim 2, wherein the anchoring portion is a balloon arranged on the first tube body. When the balloon is in a contracted state, a medical device can pass through the balloon in the extension tube; when the balloon is in a filled state, the balloon expands radially along the first tube body and is in contact with an anchoring position to anchor the extension tube.
4. The guide catheter according to claim 2, wherein an end of the third tube body distal to the second tube body is configured as a tapered tip, and the tapered tip has radiopacity. The stiffness of the extension tube gradually decreases from the first tube body to the third tube body.
5. The guide catheter of claim 2, wherein, 6. The guide catheter according to claim 2, wherein the first tube body is configured as an inner liner layer, a metal layer and a first outer tube layer from the inside to the outside in the radial direction.
7. The guide catheter according to claim 6, wherein the variable diameter end of the syringe is inserted between the metal layer and the first outer tube layer.
8. The guide catheter according to claim 2, wherein the second tube body is configured as an inner liner layer, a metal layer and a second outer tube layer from the inside to the outside in the radial direction.
9. The guide catheter according to claim 2, wherein the third tube body is configured as an inner liner layer, a metal layer and a third outer tube layer from the inside to the outside in the radial direction.
10. The guide catheter according to claim 3, wherein the balloon is configured as a medium-hardness low-elasticity layer, a high-hardness low-elasticity layer and a low-hardness high-elasticity layer from the inside to the outside in the radial direction.