Hemostatic valve with micro-wire guide structure

Abstract

This invention provides a hemostatic valve with a microguidewire guiding structure, relating to the field of hemostatic valve technology. It includes a valve body and a guiding structure assembled near the proximal end of the valve body. The guiding structure consists of a main body and a circumferentially rotatable limiting ring. The main body has an outwardly opening, through-hole guidewire cavity with an opening on the outer wall. The limiting ring has a notch that matches the opening of the guidewire cavity. The guiding structure is equipped with a guide rod, and a fixing component near the proximal end of the valve body allows the guide rod to slide, making the guidewire cavity coaxial with the valve body cavity. In use, the microguidewire is inserted into the guidewire cavity, the limiting ring is rotated to close the side opening, and the guidewire is retracted, straightened by the cavity constraint, and self-locked by the elasticity of the bent section. After the entire assembly is inserted into the valve body, the guiding structure is removed. This invention eliminates the need for a sheath core, simplifying the operation process. It can stably fix and straighten the microguidewire, and can seal against bleeding after the limiting ring is misaligned. The guiding structure is reusable, reducing the cost of surgical consumables.

Description

Technical Field

[0001] This utility model relates to the field of hemostatic valve technology, and in particular to a hemostatic valve with a microguide wire guiding structure. Background Technology

[0002] In interventional vascular surgery, Y-type hemostatic valves are commonly used in clinical practice and are attached to the proximal end of the vascular sheath and guiding catheter. They are the core operating port for the entry, exit, and control of the microguidewire. The microguidewires used in clinical practice are usually bent in advance because the surgeon needs to avoid the microguidewire puncturing the blood vessel during the operation. At present, there is no integrated guiding hemostatic valve in the industry that is compatible with bent microguidewires. When placing microguidewires in clinical practice, only a separate matching sheath core can be used as an auxiliary tool to complete the straight shaping and delivery of the bent microguidewire. Sheath core assisted loading has become the standard operating procedure for existing hemostatic valves.

[0003] The existing procedure for inserting microguidewires using a sheath core has significant technical drawbacks: First, the complete procedure is complex, requiring manual straightening of the bent microguidewire tip before inserting it into the sheath core. After pushing the entire microguidewire into the valve body lumen, the sheath core must be withdrawn in stages. The alternating use and storage of multiple instruments significantly prolongs the surgical operation time, and the back-and-forth switching of instruments also interferes with the surgical field of vision. Second, manually straightening the microguidewire makes it difficult to maintain stable control of the force. The bent section of the microguidewire is inherently elastic and prone to rebound and slippage. During the pushing process, problems such as guidewire jamming and scraping against the inner wall of the valve body channel can easily occur. Utility Model Content

[0004] This utility model provides a hemostatic valve with a microguidewire guiding structure, specifically including: a valve body and a guiding structure. The guiding structure is disposed at the proximal end of the valve body, and the side of the guiding structure facing the proximal end of the valve body is inserted into the proximal end opening of the valve body. The guiding structure consists of a main body and a limiting ring. A guidewire cavity is formed inside the main body along the central axis of the main body. The guidewire cavity penetrates the main body and forms an opening on the outer wall of the main body. A limiting ring is sleeved on the outer side of the main body. The limiting ring has a notch corresponding to the opening formed by the guidewire cavity on the outer wall of the main body, and the limiting ring rotates along the outer wall of the main body.

[0005] Preferably, the guide structure further includes a guide rod, and a fixing member is provided at the near end of the valve body, and the fixing member has a through hole for the guide rod to be inserted; the guide rod slides along the through hole of the fixing member, so that the central axis of the main body coincides with the central axis of the valve body.

[0006] Preferably, the guide wire cavity gradually opens along the central axis of the main body towards the outer wall of the main body.

[0007] Preferably, the diameter of the end of the main body facing the valve body is smaller than the diameter of the valve body's cavity, and after the main body is inserted into the valve body, the end of the main body facing the valve body is inserted into the valve body's cavity.

[0008] Preferably, the outer side of the limiting ring is provided with friction texture.

[0009] Preferably, the fixing member is integrally formed with the valve body.

[0010] Preferably, the fixing member is detachably connected to the valve body.

[0011] Beneficial effects 1. In this utility model, a microguidewire constraint structure is formed by the side-opening guidewire cavity of the main body and the rotatable limiting ring. The insertion of the original bent-end microguidewire can be completed without the need for an additional sheath core, eliminating the multiple cumbersome procedures of inserting, pushing, and removing the sheath core in traditional operations, and greatly shortening the operation time. After the straight section of the microguidewire is placed into the guidewire cavity, the limiting ring is rotated to close the side opening. A slight retraction of the microguidewire can straighten it by relying on the cavity constraint. At the same time, the elasticity of the bent section of the microguidewire itself can achieve automatic clamping and fixation, avoiding slippage and rebound problems caused by manual straightening. The guidewire cavity adopts an outwardly opening structure, which facilitates the loading of bent microguidewires and is not prone to jamming. Friction texture is set on the outside of the limiting ring, which can be rotated and aligned by hand. After the opening is closed by misalignment, it can also prevent blood leakage during the operation, taking into account both the convenience of operation and the sealing and hemostasis effect. 2. In this utility model, the guide structure is equipped with a guide rod that slides in conjunction with the valve body's proximal fixing component. After adjustment, the central axis of the guide wire cavity can be aligned with the central axis of the valve body cavity. The front end of the main body is smaller than the valve body cavity, and the two channels are seamlessly connected after insertion. The straightened microguide wire is pushed smoothly without any steps or jamming. The fixing component can be either integrally formed with the valve body or detachably connected. Integral forming reduces production costs, while detachable structure facilitates the individual replacement of consumable parts. The guide structure can be completely removed from the valve body. After removal, the microguide wire remains in a straight line inside the valve body tube, without obstructing the surgical operation area. Furthermore, the guide structure can be repeatedly disassembled and reused, reducing the cost of consumables. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0013] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0014] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram of a hemostatic valve according to an embodiment of the present invention is shown.

[0015] Figure 2A three-dimensional structural schematic diagram of the guide structure of the hemostatic valve according to an embodiment of the present invention is shown.

[0016] Figure 3 An assembly diagram of the guide structure and valve body of the hemostatic valve according to an embodiment of the present invention is shown.

[0017] Figure 4 A schematic diagram of the existing microguidewire assembly process for the hemostasis valve according to the present invention is shown.

[0018] Figure 5 A schematic diagram of the microguidewire assembly process of the hemostatic valve according to an embodiment of the present invention is shown.

[0019] List of main reference numerals 1. Valve body; 2. Guiding structure; 201. Main body; 202. Guide wire cavity; 203. Limiting ring; 204. Guide rod; 3. Fasteners; 4. Sheath core; 5. Microguidewire. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0022] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0023] In this document, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] Example: Please refer to Figures 1 to 5 : This embodiment provides a hemostatic valve with a microguidewire guiding structure. The valve body 1 is the Y-type valve used in interventional surgery, and the overall structure is as follows: Figure 1 As shown, the hemostatic valve mainly consists of two parts: a valve body 1 and a guide structure 2. The guide structure 2 is assembled at the proximal end of the valve body 1, and the side of the guide structure 2 facing the proximal end of the valve body 1 forms a plug-in fit with the proximal opening of the valve body 1. The independent structural form of the guide structure 2 is as follows: Figure 2 As shown, the guide structure 2 comprises two basic components: a main body 201 and a limiting ring 203. A guide wire cavity 202 is formed inside the main body 201 along its central axis, penetrating the main body 201 and forming an exposed opening on the outer wall of the main body 201. The limiting ring 203 is fitted onto the outside of the main body 201 and can rotate circumferentially along the outer wall of the main body 201. A notch is provided on the limiting ring 203, which corresponds to the exposed opening of the guide wire cavity 202 on the outer wall of the main body 201. When the limiting ring 203 rotates until the notch aligns with the opening of the guide wire cavity 202, the guide wire can enter the guide wire cavity 202 through the notch. After rotational misalignment, the side opening of the guide wire cavity 202 is closed. The assembly state of the guide structure 2 and the valve body 1 is as follows. Figure 3 As shown.

[0025] like Figure 1 and Figure 3 As shown, in this embodiment, the guide structure 2 is also equipped with a guide rod 204, and a fixing member 3 is provided at the proximal end of the valve body 1. The fixing member 3 has a through hole for the guide rod 204 to be inserted. The guide rod 204 can slide axially along the through hole inside the fixing member 3. By sliding and adjusting the overall position of the guide structure 2, the central axis of the main body 201 is completely aligned with the central axis of the valve body 1, ensuring that the microguide wire can smoothly enter the main channel inside the valve body 1 after being inserted. In this embodiment, the fixing member 3 has two optional assembly forms. The first form is that the fixing member 3 and the valve body 1 are integrally formed, and the integral injection molding is directly completed during production and processing without additional assembly. The second form is that the fixing member 3 and the valve body 1 adopt a detachable connection structure, and the worn fixing member 3 can be replaced separately in clinical use to adapt to different specifications of the guide structure 2.

[0026] like Figure 1 and Figure 2 As shown, in this embodiment, the guide wire cavity 202 inside the main body 201 has an involute structure along the central axis of the main body 201 toward the outer wall of the main body 201. This involute structure facilitates the placement of the micro guide wire 5 into the guide wire cavity 202.

[0027] like Figure 3 As shown, in this embodiment, the outer diameter of the end of the main body 201 facing the valve body 1 is smaller than the inner diameter of the inner cavity of the valve body 1. After the main body 201 and the valve body 1 are connected and assembled, the end of the main body 201 facing the valve body 1 will extend into the cavity of the valve body 1, realizing seamless docking between the guide wire cavity 202 and the main channel of the valve body 1. After the micro guide wire 5 is sent from the guide wire cavity 202, it can slide directly into the interior of the valve body 1 without any steps blocking it.

[0028] like Figure 2 As shown in this embodiment, the outer surface of the limiting ring 203 is machined with friction texture. When medical staff rotate the limiting ring 203 by hand, the friction texture can increase the friction between the hand and the limiting ring 203, so that the rotation and alignment operation of the limiting ring 203 can be easily completed without the aid of tools, thus improving the convenience of intraoperative operation.

[0029] The existing microwire assembly process is as follows: Figure 4 As shown, the microguidewire 5 used clinically is bent at the tip. In routine operation, the bent microguidewire 5 needs to be straightened manually, and then the straightened microguidewire 5 is inserted into the sheath core 4. Then the sheath core 4 containing the microguidewire 5 is inserted into the valve body lumen from the proximal end of the valve body 1. After the microguidewire 5 reaches the target position, the sheath core 4 is extracted one by one. The whole operation is complicated. The sheath core 4 needs to be taken and stored during the operation, which takes up the operation time. The bent microguidewire is also very prone to problems such as tube jamming and poor push.

[0030] The microwire assembly process of this utility model is as follows: Figure 5As shown, before the procedure, the guide structure 2 is pre-assembled onto the fixing member 3 near the proximal end of the valve body 1 via the guide rod 204. First, the limiting ring 203 is rotated so that the notch of the limiting ring 203 is aligned with the opening of the guide wire cavity 202 on the outer wall of the main body 201, and the straight section of the microguidewire 5 is directly placed into the guide wire cavity 202. Then, the limiting ring 203 is rotated so that the notch of the limiting ring 203 is misaligned with the opening of the guide wire cavity 202, closing the side opening of the guide wire cavity 202. After sealing, the microguidewire 5 is slightly retracted outward. Relying on the double constraint of the limiting ring 203 and the inner wall of the guide wire cavity 202, the originally bent microguidewire 5 is completely straightened. The bent section of the microguidewire 5 itself has elasticity and forms a shape inside the guide wire cavity 202. The tight limiting effect ensures that the microguidewire 5 is stably and relatively fixed in the guidewire cavity 202, preventing slippage. Maintaining the fixed state of the microguidewire 5, the guide structure 2 is pushed towards one side of the valve body 1, inserting it into the cavity of the valve body 1. The guidewire cavity 202 seamlessly connects with the main channel of the valve body 1, and the microguidewire 5 enters the valve body cavity. Finally, the entire guide structure 2 is withdrawn separately. After the microguidewire 5 is freed from the guidewire cavity constraint, it remains in a straight line inside the cavity of the valve body 1, completing the microguidewire insertion operation. If the microguidewire needs to be inserted again, simply rotate the limiting ring 203 to align the notch, and the guide structure 2 can be reused. This eliminates the need for multiple steps of sheath core removal, pushing, and extraction, compared to... Figure 4 The existing operating procedures are greatly simplified, reducing the assembly steps of the microguidewire in interventional surgery, lowering the difficulty of operation, and shortening the operation time.

[0031] The above description is merely a specific embodiment of this application. Under the guidance of the above teachings, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of this application, and the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hemostatic valve with a microguidewire guiding structure, comprising a valve body (1) and a guiding structure (2), characterized in that, The guide structure (2) is located at the proximal end of the valve body (1), and the side of the guide structure (2) facing the proximal end of the valve body (1) is inserted into the proximal opening of the valve body (1); the guide structure (2) consists of a main body (201) and a limiting ring (203). The guide wire cavity (202) is opened inside the main body (201) along the central axis of the main body (201). The guide wire cavity (202) penetrates the main body (201) and forms an opening on the outer wall of the main body (201); the limiting ring (203) is sleeved on the outer side of the main body (201). The limiting ring (203) has a notch corresponding to the opening formed by the guide wire cavity (202) on the outer wall of the main body (201), and the limiting ring (203) rotates along the outer wall of the main body (201).

2. The hemostatic valve with a microguidewire guiding structure according to claim 1, characterized in that, The guide structure (2) also includes a guide rod (204). A fixing member (3) is provided near the valve body (1), and a through hole for inserting the guide rod (204) is provided inside the fixing member (3). The guide rod (204) slides along the through hole of the fixing member (3) and makes the central axis of the main body (201) coincide with the central axis of the valve body (1).

3. A hemostatic valve with a microguidewire guiding structure according to claim 1, characterized in that, The guide wire cavity (202) gradually opens along the central axis of the main body (201) towards the outer wall of the main body (201).

4. A hemostatic valve with a microguidewire guiding structure according to claim 1, characterized in that, The diameter of the end of the main body (201) facing the valve body (1) is smaller than the diameter of the cavity of the valve body (1), and after the main body (201) is inserted into the valve body (1), the end of the main body (201) facing the valve body (1) is inserted into the cavity of the valve body (1).

5. A hemostatic valve with a microguidewire guiding structure according to claim 1, characterized in that, The outer side of the limiting ring (203) is provided with friction texture.

6. A hemostatic valve with a microguidewire guiding structure according to claim 2, characterized in that, The fixing component (3) is integrally formed with the valve body (1).

7. A hemostatic valve with a microguidewire guiding structure according to claim 2, characterized in that, The fastener (3) is detachably connected to the valve body (1).

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