Guide wire conveying device for interventional therapy of patent foramen ovale

Abstract

The utility model discloses a guide wire conveying device for interventional therapy of patent foramen ovale. The guide wire conveying device comprises an outer sheath assembly and an inner sheath assembly. The outer sheath assembly comprises an outer sheath tube (1) and an operating handle (6), and the tail end of the outer sheath tube and the operating handle are assembled together; a bending adjusting control mechanism is arranged at the operating handle; the inner sheath assembly comprises an inner sheath tube (2) and an inner sheath base (7), and the tail end of the inner sheath tube and the inner sheath base are assembled together; the head end of the inner sheath tube is in a sharp mouth structure; the head end section (22) of the inner sheath tube is provided with a bending adjusting mechanism, and the head end section can perform bending steering action based on the bending adjusting mechanism; the head end section of the inner sheath tube is a section where the head end of the inner sheath tube is located; the inner sheath tube of the inner sheath assembly is arranged in the outer sheath tube of the outer sheath assembly in a penetrating mode, and the bending adjusting mechanism is controlled by the bending adjusting control mechanism. By means of the guide wire conveying device, the guide wire can accurately penetrate through an oval hole.

Description

Technical Field

[0001] The utility model relates to a cardiac interventional instrument, in particular to a guide wire delivery device used for interventional treatment of patent foramen ovale. Background Art

[0002] Patent foramen ovale is a common congenital heart disease. The commonly used treatment for this heart disease is to perform foramen ovale closure on the patient's heart. Specifically, a foramen ovale occluder is placed at the foramen ovale of the patient's heart.

[0003] Before placing the foramen ovale occluder, a guide wire must first be passed through the foramen ovale to facilitate guiding the foramen ovale occluder to the foramen ovale for placement. Currently, the specific method of passing the guide wire through the foramen ovale is: passing the foramen ovale only by a catheter, or passing the guide wire through the foramen ovale under the support of a catheter.

[0004] The current problem is that existing conventional catheters and guidewires can only pass through larger foramina ovale. However, a considerable proportion of foramina ovale are small, and conventional catheters cannot provide sufficient support and a suitable angle for the guidewire to pass through. Summary of the invention

[0005] The utility model aims to provide a guidewire delivery device for interventional treatment of patent foramen ovale, wherein the guidewire delivery device can accurately pass the guidewire through the foramen ovale.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] A guidewire delivery device for interventional treatment of patent foramen ovale, the guidewire delivery device comprising an outer sheath assembly and an inner sheath assembly; the outer sheath assembly comprises an outer sheath tube and an operating handle, the tail end of the outer sheath tube being assembled with the operating handle; a bending control mechanism is provided at the operating handle; the inner sheath assembly comprises an inner sheath tube and an inner sheath base, the tail end of the inner sheath tube being assembled with the inner sheath base; the head end of the inner sheath tube is configured as a pointed mouth configuration; the head end segment of the inner sheath tube is provided with a bending adjustment mechanism, based on which the head end segment can perform bending and turning movements; the head end segment of the inner sheath tube is a segment where the head end of the inner sheath tube is located; the inner sheath tube of the inner sheath assembly is inserted into the outer sheath tube of the outer sheath assembly, and the bending adjustment mechanism is controlled by the bending control mechanism.

[0008] Furthermore, a rubber nozzle is provided at the head end of the inner sheath tube.

[0009] Furthermore, a liquid injection hole is provided at the head end of the inner sheath tube.

[0010] Furthermore, a side branch catheter is also provided on the inner sheath base, and the side branch catheter is used to connect a syringe.

[0011] Compared with the prior art, the guide wire delivery device of the utility model has the following beneficial effects:

[0012] 1) The outer sheath in the guidewire delivery device has a strong supporting force, thereby being able to provide a strong supporting force;

[0013] 2) The inner sheath in the guidewire delivery device can be bent and turned, which is helpful for controlling the extended guidewire to align and pass through the oval foramen;

[0014] 3) The rubber tip of the guidewire delivery device is soft and can avoid touching and damaging the heart and causing dissection;

[0015] 4) The injection hole at the tip of the inner sheath is convenient for injecting contrast agent into the patient's heart to assist in the smooth implementation of the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic structural diagram of a guide wire delivery device for interventional treatment of patent foramen ovale. DETAILED DESCRIPTION

[0017] The utility model is further described below with specific embodiments:

[0018] This embodiment provides a guidewire delivery device for interventional treatment of patent foramen ovale, which is used to accurately pass the guidewire through the foramen ovale, thereby providing basic conditions for the implementation of "foramen ovale occlusion".

[0019] See also Figure 1 The guidewire delivery device of this embodiment includes two parts: an outer sheath component and an inner sheath component, and the two parts are assembled together to form a complete guidewire delivery device.

[0020] The outer sheath assembly itself is conventional, and is composed of an outer sheath tube 1 and an operating handle 6 combined together.

[0021] Specifically, the outer sheath tube 1 is a tubular structure as a whole, and one end of the outer sheath tube 1 is called the head end ( Figure 1 The other end of the outer sheath tube 1 is called the tail end ( Figure 1 The rear end of the outer sheath tube 1 is assembled with the operating handle 6 to form a complete outer sheath assembly. The hardness of the outer sheath tube 1 is relatively high.

[0022] The main innovation of the guidewire delivery device of this embodiment lies in the inner sheath component.

[0023] Specifically, the inner sheath assembly as a whole is composed of an inner sheath tube 2 and an inner sheath base 7 combined together.

[0024] The inner sheath tube 2 is a tubular structure as a whole, and one end of the inner sheath tube 2 is called the head end ( Figure 1 The other end of the inner sheath tube 2 is called the tail end ( Figure 1 The rear end of the inner sheath tube 2 is assembled with the inner sheath base 7 to form a complete inner sheath assembly.

[0025] The head end of the inner sheath tube 2 is configured as "a configuration in which the diameter of the inner sheath tube 2 gradually decreases from the position away from the head end to the head end", or a "gradually converging configuration". For the convenience of description, this configuration is called a pointed-mouth configuration; that is, the head end of the inner sheath tube 2 is configured as a pointed-mouth configuration.

[0026] The inner sheath tube 2 is divided into two sections as a whole, wherein the section where the head end of the inner sheath tube 2 is located is called the head end section 22 , and the section where the tail end of the inner sheath tube 2 is located is called the tail end section 21 .

[0027] The tail end segment 21 of the inner sheath tube 2 is essentially a hard tube, or in other words, the tail end segment 21 is non-bendable; the head end segment 22 of the inner sheath tube 2 is provided with a bending mechanism, based on which the head end segment 22 can be controlled to perform "bending and turning movements".

[0028] Regarding the bending adjustment mechanism, a bending control mechanism is provided at the operating handle 6, and the bending adjustment mechanism is controlled by the bending control mechanism, that is, by controlling the bending control mechanism, the head end segment 22 can be controlled to perform a "bending and turning action" in a specified direction.

[0029] It should be noted that the aforementioned “bending mechanism”, “bending control mechanism” and “bending mechanism controlled by bending control mechanism” are all prior art, and their implemented structural forms are roughly as follows:

[0030] An axial fixing ring 23 and an adjusting ring 24 of a bending line are provided at the head end segment 22 of the inner sheath tube 2. The axial fixing ring 23 and the adjusting ring 24 of the bending line are connected to the control key provided at the operating handle 6 through the bending line. In this way, the movement of the axial fixing ring 23 and the adjusting ring 24 of the bending line can be controlled by operating the control key at the operating handle 6, thereby finally realizing the control of the head end segment 22 to perform "bending and turning movement".

[0031] Since the above-mentioned "bending wire axial fixing ring 23, bending ring 24, bending wire, etc." are all existing technologies, the structural forms of their functions are well known to those skilled in the art, so they will not be repeated in this article.

[0032] A glue nozzle 25 is provided at the head end of the inner sheath tube 2. The purpose of providing the glue nozzle 25 is that when the head end of the inner sheath tube 2 is used to support the heart interval and the heart interlayer, the flexible glue nozzle 25 can prevent the heart interval or the heart interlayer from being damaged due to the rigid support.

[0033] A liquid injection hole 26 is also provided at the head end of the inner sheath tube 2. The purpose of providing the liquid injection hole 26 is to facilitate the injection of the functional liquid into the patient's heart through the inner sheath tube 2.

[0034] The inner sheath base 7 is also provided with a side branch catheter 4, one end of which is connected to the inner sheath tube 2 via the inner sheath base 7 and can be connected to the injection hole 26, and the other end of which can be used to connect a syringe, so as to facilitate the use of a syringe to inject various functional liquids into the patient's heart to achieve the desired functional effect. For example, contrast agents are injected into the patient's heart to achieve a contrast effect and provide a clear image for finding the foramen ovale.

[0035] As mentioned above, the guidewire delivery device of this embodiment is composed of an outer sheath component and an inner sheath component assembled together, as follows:

[0036] Insert the "head end of the inner sheath tube 2 of the inner sheath assembly" into the outer sheath tube 1 from the "tail end of the outer sheath tube 1 of the outer sheath assembly" until the head end of the outer sheath tube 1;

[0037] Or,

[0038] The inner sheath tube 2 of the inner sheath assembly is inserted into the outer sheath tube 1 of the outer sheath assembly, and the head end of the inner sheath tube 2 corresponds to the head end of the outer sheath tube 1 , and the tail end of the inner sheath tube 2 corresponds to the tail end of the outer sheath tube 1 .

[0039] The specific operation method of the guide wire delivery device of this embodiment is as follows:

[0040] The pre-prepared guide wire is inserted into the inner sheath tube 2 via the inner sheath base 7, and the guide wire delivery device of this embodiment is introduced into the patient's heart. The head end of the inner sheath tube 2 extends out of the head end of the outer sheath tube 1, and the head end of the outer sheath tube 1 is introduced into the right atrium of the patient's heart via the femoral vein of the patient. With the help of the fluoroscopic image, the head end of the inner sheath tube 2 is used to support the opening of the oval foramen to form a certain supporting force. At the same time, the head end of the inner sheath tube 2 is controlled to turn to align with the opening of the oval foramen, and then the inner sheath tube 2 is controlled to be retracted, and the primary septum and the secondary septum of the oval foramen are separated as much as possible by retracting the inner sheath tube 2, and then the guide wire in the inner sheath tube 2 is extended from the head end of the inner sheath tube 2, and the extended guide wire passes through the oval foramen. After completing "passing the guide wire through the oval foramen", the entire guide wire delivery device is withdrawn from the patient's heart. At this point, the entire operation process ends, and the purpose of "passing the guide wire through the oval foramen" is achieved.

[0041] It should be noted that, in this embodiment, the hardness of the outer sheath tube 1 is greater than the tail segment 21 of the inner sheath tube 2, and the hardness of the tail segment 21 of the inner sheath tube 2 is greater than the hardness of the head segment 22. The function of the outer sheath tube 1 is to provide sufficient support to prevent the tail segment 21 of the inner sheath tube 2 from deforming and bending.

[0042] The head end segment 22 of the inner sheath tube 2 has an arc in the initial state, and its hardness gradually decreases from the tail end to the head end, and its inner diameter gradually decreases from the tail end to the head end. The head end segment 22 of the inner sheath tube 2 also has sufficient support to prevent the patient from sliding due to changes in the position and shape of the heart during the intraoperative cooperation process (such as coughing, holding breath, etc.).

[0043] The inner sheath base 7 is provided with a side branch catheter 4, and a three-way valve is provided at the end thereof. The operator can connect a syringe filled with contrast agent to the three-way valve for intraoperative contrast imaging.

[0044] The presence of the injection hole 26 can provide a better visualization effect, avoid frequent replacement of the catheter, reduce the operation time, and avoid positioning errors after replacing the catheter.

[0045] The guide wire delivery device of this embodiment has the advantages that:

[0046] 1) The outer sheath 1 in the guidewire delivery device has a strong supporting force, thereby being able to provide a strong supporting force and solving the problem of insufficient supporting force of conventional catheters;

[0047] 2) The inner sheath tube 2 in the guidewire delivery device can bend and turn, which is helpful to control the extended guidewire to accurately align and pass through the oval foramen;

[0048] 3) The rubber tip 25 in the guidewire delivery device is soft in texture, which can avoid the situation of "touching and damaging the heart and causing dissection";

[0049] 4) The provided injection hole 26 facilitates the injection of contrast agent into the heart to assist in the smooth implementation of the surgical operation.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A guidewire delivery device for interventional treatment of patent foramen ovale, characterized in that: The guidewire delivery device comprises an outer sheath component and an inner sheath component; The outer sheath assembly comprises an outer sheath tube (1) and an operating handle (6), wherein the tail end of the outer sheath tube (1) is assembled with the operating handle (6); a bending control mechanism is provided at the operating handle (6); The inner sheath assembly comprises an inner sheath tube (2) and an inner sheath base (7), and the tail end of the inner sheath tube (2) is assembled with the inner sheath base (7); The head end of the inner sheath tube (2) is arranged in a pointed configuration; the head end segment (22) of the inner sheath tube (2) is provided with a bending mechanism, based on which the head end segment (22) can perform bending and turning movements; the head end segment (22) of the inner sheath tube (2) is a segment where the head end of the inner sheath tube (2) is located; The inner sheath tube (2) of the inner sheath component is inserted into the outer sheath tube (1) of the outer sheath component, and the bending adjustment mechanism is controlled by the bending adjustment control mechanism.

2. The guidewire delivery device for interventional treatment of patent foramen ovale according to claim 1, characterized in that: A rubber nozzle (25) is provided at the head end of the inner sheath tube (2).

3. The guidewire delivery device for interventional treatment of patent foramen ovale according to claim 1, characterized in that: A liquid injection hole (26) is provided at the head end of the inner sheath tube (2).

4. The guidewire delivery device for interventional treatment of patent foramen ovale according to claim 3, characterized in that: A side branch catheter (4) is also provided on the inner sheath base (7), and the side branch catheter (4) is used for connecting a syringe.

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