Guide catheter capable of being adjusted to be centered and intervention assembly
By designing an adjustable and centered guiding catheter and utilizing multiple support arms to switch states within the blood vessel, the problem of guiding catheter displacement within the blood vessel is solved, improving the safety and efficiency of interventional procedures and simplifying the surgical process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-05-19
AI Technical Summary
In percutaneous coronary intervention, the guiding catheter and guidewire are easily obstructed or damaged in the blood vessel wall, leading to surgical risks and prolonged operation time. Existing dual guidewire technology can only provide postoperative relief and cannot prevent vascular damage.
An adjustable and centered guiding catheter is designed. By distributing multiple support arms at the distal end of the catheter body, the support arms are switched between eversion and convergence states using a transmission wire, which helps the catheter to be centered in the blood vessel and reduces the risk of displacement.
It improves the safety and efficiency of interventional procedures, avoids vascular damage caused by guidewires entering false lumens, simplifies the surgical process, and shortens the operation time.
Smart Images
Figure CN224251921U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of interventional medical devices, and more particularly to an adjustable and centered guiding catheter and interventional components. Background Technology
[0002] During percutaneous coronary intervention (PCI), if the patient's blood vessels have significant tortuosity or large curvature, see [reference needed]. Figure 1 During puncture, the guiding catheter 100 and guidewire 200 are easily obstructed by plaque 300, and may even damage the inner wall of the blood vessel. In particular, when the straight guidewire is pressed against the blood vessel wall 400, it often induces vasospasm, leading to luminal narrowing, local twisting and deformation, and in severe cases, even vascular tearing, forming a dissected "false lumen," which in turn causes vascular ischemia. This not only hinders the surgical process but may also endanger the patient's life.
[0003] Currently, the dual-guidewire technique is commonly used in clinical practice to address this risk. This involves fixing one guidewire in the false lumen and running the other through the true lumen, allowing instruments to precisely reach the lesion. However, this technique is essentially a remedial measure, used only after a guidewire has mistakenly entered the false lumen, and cannot prevent vascular injury at its source. Furthermore, this technique can still affect the patient's vital signs, prolong the procedure, and inherent intraoperative risks remain. Utility Model Content
[0004] This application provides a guide catheter that can be actively controlled to align the distal end of the catheter and guidewire within the blood vessel, thereby improving the efficiency and safety of interventional procedures.
[0005] This application discloses an adjustable, centered guide tube, comprising:
[0006] The tube has a distal end and a proximal end along its own axis. The distal end of the tube has multiple support arms distributed along the circumference of the tube. Each support arm is an integral structure with the tube. The multiple support arms have a relative outward-turned state and a converged state. A through-passage is provided in the tube wall of the tube.
[0007] A handle is fixed to the proximal end of the tube body;
[0008] A control handle is slidably mounted on the grip handle;
[0009] A transmission wire is movably disposed in the threading channel. The proximal end of the transmission wire is connected to the control handle, and the distal end of the transmission wire is connected to the corresponding support arm to drive multiple support arms to switch between an outward-folding state and a converged state.
[0010] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.
[0011] Optionally, the number of support arms is 3 to 8.
[0012] Optionally, there are multiple transmission wires, with each support arm having its own corresponding transmission wire, and the threading channel corresponding to each transmission wire.
[0013] Optionally, the tube body is a multi-lumen tube, wherein the guidewire channel serves as the central lumen and is centrally located, and the insertion channel is arranged around the outer periphery of the guidewire channel.
[0014] Optionally, the control handle has a ring structure and is slidably sleeved on the grip handle.
[0015] Optionally, a guide structure is provided between the control handle and the grip handle to guide axial relative movement.
[0016] Optionally, a locking structure is provided between the control handle and the grip handle to maintain their axial relative positions.
[0017] Optionally, the transmission wire is a nickel-titanium alloy wire, and the distal end of the transmission wire has a connecting section extending out of the threading channel. The connecting section is fixed to the support arm by a clip.
[0018] Optionally, the distal end of the tube has multiple slits distributed along the circumference of the tube, and multiple support arms are formed by the separation of the multiple slits.
[0019] This application also provides an intervention component, including:
[0020] The guide tube is the adjustable and centered guide tube described in this application;
[0021] The guidewire is movably threaded through the body of the guide tube.
[0022] This application's adjustable and centered guiding catheter, through structural improvements at the distal end, utilizes multiple support arms integrated with itself to change the distal orientation of the guiding catheter with the assistance of the blood vessel wall. This facilitates adjustment of the distal orientation of the catheter, improves guidewire passage, and further enhances the safety of interventional procedures. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram illustrating the obstruction encountered by the guiding catheter and guidewire in the blood vessel in the existing technology;
[0025] Figure 2 This is a schematic diagram of the guide tube structure of this application;
[0026] Figure 3 for Figure 2 AA section view in the middle;
[0027] Figure 4 for Figure 2 Side view of the central guide tube;
[0028] Figure 5 This is a schematic diagram of the internal structure of the guide tube in this application, showing multiple support arms in a converged state.
[0029] Figure 6 This is a schematic diagram of the internal structure of the guide tube in this application, showing multiple support arms in an outward-folded state.
[0030] Figure 7 This is a schematic diagram of the guiding catheter passing through a blood vessel according to this application;
[0031] Figure 8 This is a schematic diagram of the guiding catheter of this application passing through a blood vessel, with multiple support arms in an everted state.
[0032] The component labels are as follows:
[0033] 100. Guiding catheter; 110. Tube body; 101. Distal end; 102. Proximal end; 103. Luer connector; 104. Guidewire channel; 105. Passage channel; 106. Gap; 107. Support arm; 120. Handle; 121. Slide rail; 130. Control handle; 140. Drive wire; 141. Connecting section; 142. Clip; 200. Guidewire; 300. Plaque; 400. Vessel wall. Detailed Implementation
[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.
[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0037] See Figures 2-6 To address the issue of non-centering of the guiding catheter or guidewire within a blood vessel during puncture, one embodiment of this application provides an adjustable centering guiding catheter 100, which includes a tube body 110, a handle 120, a control handle 130, and a transmission wire 140.
[0038] The tube body 110 has a distal end 101 and a proximal end 102 along its own axis. The proximal end 102 is the end closer to the operator during use, and the distal end 101 is the end inside the interventional body and closer to the lesion. The length and diameter of the tube body 110 can be adapted for interventional delivery and set according to actual needs. For example, the total length of the tube body 110 is 60-90 cm. The tube body 110 has a through guidewire channel 104 inside. A Luer connector 103 can be provided at the proximal end of the tube body 110 for connecting external tubing or instruments.
[0039] The length of the tube 110 in each of the attached drawings is limited by the scale of the drawings and is only used for schematic illustration. It does not necessarily represent the actual size ratio with the handle 120.
[0040] The tube body 110 itself can be made of polymer material and reinforced with mesh, ribs, etc. as needed. In order to provide different channels, the tube body 110 can be a multi-lumen tube, in which the guide wire channel 104 is the central cavity and is centrally arranged. The guide wire channel 104 is suitable for guide wires of 0.014in, 0.018in, 0.035in and other specifications, with a wide range of compatibility.
[0041] Multiple threading channels 105 are provided on the outer periphery of the guide wire channel 104, and multiple drive wires 140 are movably arranged in the corresponding threading channels 105.
[0042] The distal end 101 of the tube body 110 has multiple support arms 107 distributed along the circumference of the tube body. Each support arm 107 is an integral structure with the tube body 110. The ends of the multiple support arms 107 can move radially along the tube body, that is, they have a relative everted state and a converged state. In the converged state, they have the same outer diameter or shape as other parts of the tube body 110 and further converge, which facilitates delivery during in vivo intervention. In the everted state, the multiple support arms 107 form a flared shape, which, with the auxiliary support of the blood vessel wall, allows the distal end of the tube body 110 to be located in the center of the blood vessel.
[0043] The multiple support arms 107 can be formed in the following manner: for example, multiple slits 106 are distributed along the circumference of the tube body 110 at the distal end of the tube body, and multiple support arms 107 are formed by the separation of the multiple slits 106. The multiple slits 106 can be formed again at the end after the tube body 110 is pre-formed.
[0044] The handle 120 is fixed to the proximal end of the tube body 110 for the user to hold. The control handle 130 is slidably mounted on the handle 120. The proximal end of the transmission wire 140 is connected to the control handle 130, and the distal end of the transmission wire 140 is connected to the corresponding support arm 107. By pulling or pushing the transmission wire 140 with the control handle 130, the multiple support arms 107 can switch between an outward-folding state and a converged state.
[0045] The guiding catheter 100 in this embodiment can effectively prevent unnecessary displacement of the distal end within the blood vessel, and can keep the guiding catheter 100 centered relative to the blood vessel, preventing puncture of the blood vessel and formation of dissection or false lumen during the subsequent guidewire insertion process.
[0046] In some embodiments, the number of support arms 107 is 3 to 8, for example, four. The distal edge of each support arm 107 can be smoothly rounded to reduce safety hazards. When four support arms 107 are used, the circumferential angle occupied by each support arm 107 in the circumferential direction of the tube body is approximately 90°. In the outward-folded state, the four support arms 107 expand in different directions. Along the radial direction of the tube body, the adjustment stroke of the distal end of the support arm 107 is 5-30mm, which can adapt to blood vessels with a diameter of 10mm-60mm. It can basically cover most blood vessel diameters, including coronary arteries, intracranial vessels, and peripheral vessels, and has a wide range of applications. In other embodiments, the number of support arms 107 can also be adjusted according to different blood vessel diameters and positions.
[0047] Since there are multiple support arms 107, multiple transmission wires 140 can be configured for easy driving and driven synchronously through the control handle 130. Each support arm 107 is configured with a corresponding transmission wire 140. The transmission wire 140 is a nickel-titanium alloy wire, and the threading channel 105 corresponds one-to-one with the transmission wire 140.
[0048] To secure the transmission wire 140, a connecting section 141 extending into a guide channel 105 is provided at the distal end of the transmission wire 140. The connecting section 141 is fixed to the support arm 107 by means of a clip 142 (metal sheet) or other methods. For example, the clip 142 can also be made of nickel-titanium material and welded to the distal end of the transmission wire 140. The clip 142 is fixed to the corresponding support arm 107 by means of welding, bonding, pre-embedding, etc., and is located on the inner side of the tube body radially. The clip 142 can provide a larger contact area to ensure connection strength.
[0049] For flexible operation, the control handle 130 can be a ring structure and slidably sleeved on the grip handle 120. The control handle 130 itself can be fixed by separate fastening for easy installation.
[0050] In another embodiment, in order to prevent the transmission wires 140 from being misaligned in the circumferential direction and to precisely control the movement of the support arm 107, a guide structure can be provided between the control handle 130 and the grip handle 120 to guide the relative axial movement.
[0051] For example, a slide rail 121 extending axially is provided on the outer periphery of the grip 120, and a guide groove that cooperates with the slide rail 121 is provided on the inner wall of the control handle 130 to guide the two to slide smoothly.
[0052] In another embodiment, a locking structure is provided between the control handle 130 and the grip handle 120 to maintain their axial relative positions. For example, slots are provided at both ends of the slide rail 121. After the control handle 130 slides to its limit position, it can be rotated by a certain angle and thus be restricted by the slots to achieve axial limiting and fixation.
[0053] The locking mechanism can also use a push rod that is threaded into the control handle 130. When the locking position is required, the push rod is rotated to press against the grip handle 120.
[0054] In another embodiment, this application also provides an intervention component, including:
[0055] The guide tube 100 is an adjustable and centered guide tube 100 as described in various embodiments of this application;
[0056] The guidewire 200 is movably inserted into the tube body 110 of the guide tube 100.
[0057] In the interventional component of this application, the guide tube 100 and the guide wire 200 cooperate with each other so that the guide wire 200 can reach the predetermined position.
[0058] See Figure 7 , Figure 8 This further explains the specific usage of the guiding catheter 100 and interventional components of this application. First, after inserting the guiding catheter 100 into the designated position, observe the angiographic X-ray image in the tortuous segment of the blood vessel.
[0059] If the position of the guide tube 100 is too off-center, the control handle 130 can be adjusted. In the default state, the control handle 130 is located on the proximal side of the grip handle 120 (near the Luer connector side). When adjustment is needed, the control handle 130 is slowly pushed forward along the slide rail 121 of the grip handle 120. Correspondingly, the control handle 130 pushes the transmission wire 140 to exert force to the far end. Because the transmission wire 140 has good pushing ability and anti-deformation ability, the transmission wire 140 transmits the pushing force to the clamp 142, which in turn drives the corresponding support arm 107 to expand outward to form an outward flipped state.
[0060] At this point, the X-ray image can be observed. If the guiding catheter 100 is in the center of the blood vessel and the tip of the guiding catheter 100 has not significantly damaged the blood vessel wall 400, the guide wire 200 can be quickly passed through it so that the guide wire 200 can reach the lesion site smoothly. If it is necessary to adjust the position or withdraw the guiding catheter 100, the control handle 130 is moved in the opposite direction so that the distal ends of the multiple support arms 107 move radially inward to converge.
[0061] The guiding catheter and interventional components of this application have a wide range of applications and can be matched with a wide variety of guidewires, basically covering all aspects of vascular interventional treatment in the human body. Compared with the existing guiding catheter combined with dual guidewire technology to treat guidewire penetration into the blood vessel wall, it can avoid harm to the patient, is simple to operate, and can shorten the interventional operation time.
[0062] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.
[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.
Claims
1. An adjustable, centered guide tube, characterized in that, include: The tube has a distal end and a proximal end along its own axis. The distal end of the tube has multiple support arms distributed circumferentially along the tube. Each support arm is an integral structure with the tube. The multiple support arms have a relative outward-turned state and a converged state. The tube has a guide wire channel and a threading channel. A handle is fixed to the proximal end of the tube body; A control handle is slidably mounted on the grip handle; A transmission wire is movably disposed in the threading channel. The proximal end of the transmission wire is connected to the control handle, and the distal end of the transmission wire is connected to the corresponding support arm to drive multiple support arms to switch between an outward-folding state and a converged state.
2. The adjustable centering guide tube according to claim 1, characterized in that, The number of support arms is 3 to 8.
3. The adjustable centering guide tube according to claim 2, characterized in that, There are multiple transmission wires, with each support arm having its own corresponding transmission wire, and the threading channel corresponds one-to-one with each transmission wire.
4. The adjustable centering guide tube according to claim 1, characterized in that, The tube body is a multi-lumen tube, wherein the guide wire channel serves as the central cavity and is centrally located, and the insertion channel is arranged on the outer periphery of the guide wire channel.
5. The adjustable centering guide tube according to claim 1, characterized in that, The control handle has a ring structure and is slidably sleeved on the grip handle.
6. The adjustable centering guide tube according to claim 5, characterized in that, The control handle and the grip handle are provided with a guide structure that cooperates with each other to guide axial relative movement.
7. The adjustable centering guide tube according to claim 5, characterized in that, The control handle and the grip handle are provided with a locking structure that cooperates with each other to maintain their axial relative positions.
8. The adjustable centering guide tube according to claim 1, characterized in that, The transmission wire is a nickel-titanium alloy wire, and the distal end of the transmission wire has a connecting section extending out of the threading channel. The connecting section is fixed to the support arm by a clip.
9. The adjustable centering guide tube according to claim 1, characterized in that, The distal end of the tube has multiple slits distributed along its circumference, which are used to form multiple support arms.
10. An intervention component, characterized in that, include: The guide tube is an adjustable, centered guide tube as described in any one of claims 1 to 9; The guidewire is movably threaded through the body of the guide tube.