Bending-adjustable Marshall vein angiography catheter

Abstract

The invention discloses an adjustable bent Marshall vein angiography catheter, belongs to the technical field of vein angiography, and is used for Marshall vein anhydrous alcohol ablation of an atrial fibrillation patient. Comprising a handle, a moving pipe is slidably arranged in the handle, one end of the handle communicates with a connector, a push ring is arranged at one end of the moving pipe, and one end in the handle is connected with an inner connecting pipe communicating with the connector; one end of the inner connecting pipe is connected with a guide pipe, memory inner ribs are evenly distributed in the guide pipe, one end of the movable pipe is connected with an external movable sleeve, and the guide pipe penetrates through the external movable sleeve. And a drainage head is inserted into one end of the guide pipe. When a Marshall vein is found through the inferior vena cava, a user only needs to push the movable tube to drive the external movable sleeve to retract and release the guide tube, the guide tube is effectively bent under the arrangement of the memory inner rib arranged in the guide tube in the circumferential direction, and the Marshall vein can be more efficiently applied to the process of finding the Marshall vein through the inferior vena cava.

Description

Technical Field

[0001] The invention belongs to the technical field of venography and is used for anhydrous alcohol ablation of Marshall veins of patients with atrial fibrillation to improve the symptoms of patients with atrial fibrillation and increase the success rate of atrial fibrillation surgery. Specifically, it relates to an adjustable curved Marshall venography catheter. Background Art

[0002] The vein of Marshall, also known as the left atrial oblique vein, is a vein that connects the left atrium to the coronary sinus.

[0003] During the angiography of the Marshall vein, the doctor uses a puncture needle to puncture the femoral vein of the patient to create a channel to enter the blood vessel. In order to expand the puncture site, the doctor will install a dilator sheath at the puncture site so that the angiography catheter can be smoothly inserted later. After the dilator sheath is in place, the doctor will insert the angiography catheter along the dilator. The dilator sheath is a tubular structure with a hemostatic valve, which is used to establish a stable channel to facilitate subsequent surgical operations. The function of the hemostatic valve is to maintain a seal when surgical instruments pass through to prevent gas and blood from leaking. After the hemostatic valve and the angiography catheter are ready, the doctor can insert the angiography catheter through the dilator sheath. The angiography catheter is connected to the syringe filled with contrast agent through the pipe, and the contrast agent can be discharged into the blood vessel by operating the push rod of the syringe. Under X-ray fluoroscopy, the catheter is passed through the femoral vein-inferior vena cava-right atrium. By pushing contrast agent, the catheter can find the opening of the coronary sinus vein and then enter the coronary sinus vein to find the Marshall vein.

[0004] With such a device, contrast agent is injected, and the insertion position of the contrast catheter is displayed in real time under X-ray fluoroscopy. The contrast catheter is pushed into the coronary sinus vein until its tip is inserted into the Marshall vein. Then a guidewire with an OTW balloon is inserted through the contrast catheter for anhydrous alcohol ablation of the Marshall vein.

[0005] At present, there is no dedicated catheter for Marshall venography, and a fixed-curvature coronary artery angiography catheter is often used instead through manual shaping. The catheter is made of a relatively strong and twistable material, and its head is provided with a soft structure, so that it is not easy to cause damage to the inner wall of the blood vessel. Usually, a certain curvature is set in the head area to facilitate the catheter to find the Marshall vein in the coronary sinus venous branch. However, this type of fixed-curvature angiography catheter also has many problems during multiple surgeries:

[0006] 1. There is no dedicated catheter for Marshall venography: fixed-curvature coronary artery angiography catheters are often used instead through manual shaping, but the shaping curvature is difficult to maintain.

[0007] 2. Anatomical variation makes it difficult to fix the curved catheter in place: Affected by the anatomical position of the inferior vena cava and the coronary sinus ostium, the curvature and length of the head area of ​​the angiography catheter are difficult to adapt to the different patients during surgery to find the Marshall vein in the coronary sinus vein. It is extremely difficult to find the Marshall vein in the coronary sinus vein by manually shaping the angiography catheter and swinging the angiography catheter in a small amplitude.

[0008] 3. The fixed curved catheter is difficult to fix after it is in place: Even if the angiography enters the Marshall vein smoothly, the catheter is difficult to fix and is easy to shift, which is inconvenient for subsequent anhydrous alcohol ablation. The operation takes a long time, and a large amount of contrast is injected into the patient's body, which is harmful to the patient.

[0009] 4. Complications are prone to occur: The angiography catheter keeps swinging during the process of searching for the Marshall vein, which can easily damage blood vessels and myocardium. In severe cases, it can cause pericardial tamponade.

[0010] Based on the above four points, the current fixed curvature angiography catheter is difficult to meet the surgical requirements of complex anatomy. Therefore, it is necessary to provide an adjustable curvature Marshall venography catheter to facilitate the treatment of patients with atrial fibrillation. Summary of the invention

[0011] The object of the present invention is to provide an adjustable Marshall venography catheter to solve the problems existing in the prior art.

[0012] To achieve the above object, the present invention provides the following technical solution: an adjustable bend Marshall venography catheter, comprising a handle, a movable tube slidably disposed inside the handle, one end of the handle being connected to a joint, one end of the movable tube being provided with a push ring, one end of the handle being connected to an internal tube and the internal tube being connected to the joint;

[0013] One end of the inner tube is connected to a guide tube, and memory internal ribs are evenly distributed in the guide tube. One end of the movable tube is connected to an external movable sleeve, and the guide tube passes through the external movable sleeve.

[0014] One end of the guide tube is plugged with a row head.

[0015] Compared with the prior art, the beneficial effect of the present invention is that only the movable tube needs to be pushed to drive the external movable sleeve to retract and release the guide tube. Under the setting of the memory internal ribs arranged circumferentially inside the guide tube, the guide tube can be effectively bent, and it can be more efficiently used in the process of finding the Marshall vein through the inferior vena cava approach. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view schematic diagram of the present invention;

[0017] Figure 2 for Figure 1 A partial cutaway diagram of

[0018] Figure 3 for Figure 2 Schematic diagram of the middle guide tube extending state;

[0019] Figure 4 for Figure 2 A schematic diagram of the structure at a is enlarged;

[0020] Figure 5 for Figure 2 A schematic diagram of the structure at point b is enlarged;

[0021] Figure 6 for Figure 3 The enlarged structural diagram at c;

[0022] Figure 7 It is a schematic diagram of the distribution of memory internal tendons in the guide tube of the present invention;

[0023] Figure 8 It is a schematic diagram of the insertion direction of the angiography catheter of the present invention.

[0024] In the figure: 1 handle, 2 movable tube, 3 sealing ring 1, 4 joint, 5 push ring, 6 internal tube, 7 sealing ring 2, 8 guide tube, 9 memory inner rib, 10 external movable sleeve, 11 sealing ring, 12 supporting inner ring, 13 sealing ring 3, 14 decoupling ring, 15 row head. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , an adjustable bend Marshall venography catheter, comprising a handle 1, a moving tube 2 is slidably arranged inside the handle 1, a connector 4 is integrally arranged at the right end of the handle 1, and the connector 4 is used to connect with a syringe through a tube connector, so that the contrast medium can be discharged into a guide tube 8. A push ring 5 is integrally arranged at the left end of the moving tube 2, an internal tube 6 is integrally arranged at the right end of the handle 1, and the internal tube 6 is connected with the connector 4;

[0027] The left end of the internal pipe 6 is integrally provided with a guide pipe 8, and memory inner ribs 9 are evenly distributed in the guide pipe 8. The material of the memory inner ribs 9 is nickel-titanium memory alloy. The left end of the movable pipe 2 is connected to an external movable sleeve 10, and the guide pipe 8 slides through the external movable sleeve 10.

[0028] The left end of the guide tube 8 is welded with a head 15, which is made of medical-grade rubber. The purpose of providing the head 15 is to prevent the guide tube 8 from causing damage to the inner wall of the vein during the advancement of the vein.

[0029] Under the action of the memory inner ribs 9, when the external movable sleeve 10 is retracted to the right, the left end of the guide tube 8 is released, and the memory inner ribs 9 gradually return to their original large bending state, so that the guide tube 8 is bent accordingly.

[0030] See also Figure 2 and Figure 3 The right end of the moving tube 2 is provided with an installation ring groove 1, in which a sealing ring 3 is fused. The sealing ring 3 is made of medical grade rubber. The sealing ring 3 presses against the inner wall of the handle 1. With the setting of the sealing ring 3, the moving tube 2 and the inner wall of the handle 1 have good sealing performance.

[0031] See also Figure 2 , Figure 3 and Figure 6 An installation ring groove 1 is provided on the left end of the inner tube 6, and a sealing ring 2 7 is welded in the installation ring groove 1. The sealing ring 2 7 is made of medical grade rubber. The sealing ring 2 7 presses against the inner wall of the moving tube 2. Under the setting of the sealing ring 2 3, the inner tube 6 and the inner wall of the moving tube 2 have good sealing performance.

[0032] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 A sealing ring 11 is evenly arranged at the right end of the external movable sleeve 10, and the sealing ring 11 is tightly inserted into the ring buckle groove in the mobile tube 2. Under such an arrangement, the external movable sleeve 10 and the mobile tube 2 are not only stably connected, but also have strong sealing performance.

[0033] A supporting inner ring 12 is integrally arranged on the left side of the movable tube 2, and a ring groove is arranged in the supporting inner ring 12, and a sealing ring three 13 is fused in the ring groove. The sealing ring three 13 is made of medical-grade rubber, and the sealing ring three 13 is pressed against the outer wall of the guide tube 8. With the setting of the sealing ring 13, the external movable sleeve 10 has good sealing performance in cooperation with the outer wall of the guide tube 8 during the movement of the external movable sleeve 10.

[0034] See also Figure 2 A stripping ring 14 is embedded in the left end of the external movable sleeve 10 . The stripping ring 14 is made of medical grade stainless steel. The stripping ring 14 slides in contact with the outer wall of the guide tube 8 .

[0035] Except for the de-leading ring 14, the memory inner rib 9, each sealing ring and the row head 15, the remaining materials are all medical grade polytetrafluoroethylene, which has the characteristics of high strength and flexibility.

[0036] See also Figure 8 , Schematic diagram of the routing of the adjustable curved Marshall venography catheter.

[0037] The working principle of this embodiment is as follows:

[0038] When the guide tube 8 and the external movable sleeve 10 are inserted into the catheter sheath and penetrate into the coronary sinus ostium, the head 15 is observed according to the developing equipment, and the handle 1 is held, and the external movable sleeve 10 is extended and retracted in the vein by pushing and pulling the movable tube 2. During the rightward recovery of the external movable sleeve 10, the left end of the guide tube 8 is released, and the memory inner rib 9 gradually returns to its original large bending state, so that the guide tube 8 is bent accordingly; and when the external movable sleeve 10 is continuously inserted into the guide tube 8 to the left, the memory inner rib 9 is supported in a straight state by the pressure of the release ring 14, so that the movable sleeve 10 effectively inserts the guide tube 8, and the guide tube 8 returns to its original small bending state.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. An adjustable Marshall venography catheter, characterized in that: The invention comprises a handle (1), a movable tube (2) is slidably arranged inside the handle (1), one end of the handle (1) is connected to a joint (4), one end of the movable tube (2) is provided with a push ring (5), one end of the handle (1) is connected to an internal tube (6), and the internal tube (6) is connected to the joint (4); One end of the internal pipe (6) is connected to a guide pipe (8), and memory internal ribs (9) are evenly distributed in the guide pipe (8); one end of the movable pipe (2) is connected to an external movable sleeve (10), and the guide pipe (8) passes through the external movable sleeve (10); One end of the guide tube (8) is plugged with a discharge head (15).

2. The adjustable bend Marshall venography catheter according to claim 1, characterized in that: A sealing ring (3) is installed at one end of the moving tube (2), and the sealing ring (3) presses against the inner wall of the handle (1).

3. The adjustable bend Marshall venography catheter according to claim 2, characterized in that: The inner pipe (6) is provided with a second sealing ring (7), and the second sealing ring (7) is pressed against the inner wall of the moving pipe (2).

4. The adjustable bend Marshall venography catheter according to claim 3, characterized in that: A sealing ring (11) is evenly arranged at one end of the external movable sleeve (10), and the sealing ring (11) is inserted into a ring buckle groove in the movable tube (2); A supporting inner ring (12) is provided on one side of the moving tube (2), a sealing ring three (13) is provided inside the supporting inner ring (12), and the sealing ring three (13) is pressed against the outer wall of the guide tube (8).

5. The adjustable bend Marshall venography catheter according to claim 4, characterized in that: A stripping ring (14) is provided at the other end of the external movable sleeve (10), and the stripping ring (14) is in sliding contact with the outer wall of the guide tube (8).

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