Aortic arch type Ⅲ catheter for right radial artery cerebral angiography

Abstract

The application discloses a right radial artery type III aortic arch whole brain angiography catheter, which comprises an inner tube and an outer tube, wherein the inner tube comprises a first tube segment, a second tube segment, a third tube segment and a fourth tube segment, an included angle between the first tube segment and the second tube segment is 135-145 DEG and a first bend is formed to bend outward, an included angle between the second tube segment and the third tube segment is 40-55 DEG and a second bend is formed to bend inward, and an included angle between the third tube segment and the fourth tube segment is 130-140 DEG and a third bend is formed to bend outward; the outer tube is coaxially sleeved outside the inner tube, and the hardness of the outer tube is smaller than that of the inner tube, so that the outer tube can move along the inner tube. The angiography catheter does not need to be coiled in the aortic arch, can directly superselect the blood vessels on the arch, and reduces the coiling step of the Simmons catheter.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a right radial artery type III aortic arch whole brain angiography catheter. BACKGROUND

[0002] Right radial artery whole brain angiography is an important method currently explored by many brain vascular intervention centers. Compared with the conventional transfemoral artery approach, it significantly reduces puncture point complications. The radial artery is superficial and has a thin inner diameter, and it is easy to locate the arterial break for compression hemostasis after puncture. The puncture point hemorrhagic complication rate requiring surgical intervention is as low as 0.06%. After radial artery access interventional therapy, patients have higher comfort, do not need strict bed rest, hospitalization time is significantly shortened, and hospitalization costs are low.

[0003] However, the current used angiography catheter is mostly a Simmons catheter, which needs to be rotated into a loop in the descending aorta or the aortic valve, and then the catheter is pulled to superselect the first branch blood vessel.

[0004] A right radial artery cerebral angiography catheter is disclosed in Chinese patent application No. CN201520230005.3, which comprises a catheter head end, a catheter distal segment, a reverse folding part, a catheter body part, and a tail end connector. The catheter distal segment is a straight segment with a length of about 5-10 cm. Because the length of the catheter distal segment is relatively long, this angiography catheter needs to be rotated into a loop in the aortic arch and superselect the blood vessels above the arch. The process is complex, has high technical difficulty, and is prone to complications when operated in the aortic arch. In addition, this type of angiography catheter is prone to folding during loop formation and loop resolution, increasing the risk of surgery.

[0005] Therefore, it is necessary to design a better angiography catheter to solve the problems in the prior art. SUMMARY

[0006] The purpose of the present application is to provide a right radial artery type III aortic arch whole brain angiography catheter, which does not need to be shaped in the arch, is simple to operate, and is practical.

[0007] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0008] A right radial artery type III aortic arch whole brain angiography catheter comprises:

[0009] The inner tube comprises a first tube segment, a second tube segment, a third tube segment and a fourth tube segment connected in sequence from proximal end to distal end, a 135-145° included angle is formed between the first tube segment and the second tube segment and a first bend outwardly curved is formed, a 40-55° included angle is formed between the second tube segment and the third tube segment and a second bend inwardly curved is formed, a 130-140° included angle is formed between the third tube segment and the fourth tube segment and a third bend outwardly curved is formed, the length between the first bend and the second bend is 1.5-2.5 cm, the length between the second bend and the third bend is 2-3 cm, and the length between the third bend and the end of the fourth tube segment is 2-8 mm;

[0010] The outer tube is coaxially sleeved outside the inner tube, and the hardness of the outer tube is less than the hardness of the inner tube, so that the outer tube can move along the inner tube.

[0011] As a preferred technical solution, the total length of the inner tube is 120-130 cm, and the total length of the outer tube is 85-95 cm.

[0012] As a preferred technical solution, the tube diameter of the inner tube is 4F, and the tube diameter of the outer tube is 6F.

[0013] Compared with the prior art, the contrast guide tube of the present application has the following advantages: the contrast guide tube does not need to be pleated in the aortic arch, and can be directly super-selected to the blood vessels above the arch, thereby reducing the pleating step of the Simmons guide tube, i.e. the contrast guide tube does not need to be artificially shaped, thereby reducing the operation difficulty, shortening the operation time, reducing the operation risk, reducing the possibility of complications, and increasing the comfort of the patient after the operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic view of the inner tube of the contrast guide tube of the present application;

[0015] Figure 2 is a schematic view of the inner tube of the contrast guide tube of the present application, wherein a guide wire is shown;

[0016] Figure 3 is a schematic view of the outer tube of the contrast guide tube of the present application moving along the inner tube;

[0017] Figure 4 is a schematic view of the outer tube of the contrast guide tube of the present application moving along the inner tube; Figure 3 is a schematic view of the outer tube of the contrast guide tube of the present application moving along the inner tube;

[0018] Figure 5 is a schematic view of the outer tube and the inner tube of the contrast guide tube of the present application, at this time the guide wire has been withdrawn;

[0019] Figure 6 is a schematic view of the outer tube of the contrast guide tube of the present application, at this time the inner tube has been withdrawn. DETAILED DESCRIPTION

[0020] In order to better understand the purpose, structure, features and effects of the present application, the present application will be further described in conjunction with the drawings and specific embodiments. It should be noted that the features shown in the drawings are not necessarily drawn to scale. In addition, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0021] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall be understood as commonly understood by those having ordinary skill in the art to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not represent any order, number or importance, but are only used to distinguish different components. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly. In addition, in the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0022] The present application is a right radial artery type III aortic arch full cerebral angiography catheter, which comprises an inner tube 10 and an outer tube 20 coaxially sleeved on the outside of the inner tube 10. The total length of the inner tube 10 is 120-130 cm, and the total length of the outer tube 20 is 85-95 cm. The inner tube 10 is provided with an inner cavity for the guide wire 30 to pass through, and the outer tube 20 is provided with a passage for the inner tube 10 to pass through. The tube diameter of the inner tube 10 is 4F, and the tube diameter of the outer tube 20 is 6F.

[0023] Type III aortic arch is a term known to those skilled in the art, which refers to the distance from the top tangent of the aortic arch to the starting part of the brachiocephalic trunk being equal to 3 times or more the width of the brachiocephalic trunk. Therefore, the starting part of the brachiocephalic trunk, left common carotid artery and left subclavian artery of type III aortic arch has a large difference, the aortic arch type is large, and the operation is difficult.

[0024] As Figure 1 , Figure 2 and Figure 3As shown, the inner tube 10 comprises a first tube segment 1, a second tube segment 2, a third tube segment 3 and a fourth tube segment 4 connected in sequence from proximal end to distal end, a 135-145° included angle θ1 is formed between the first tube segment 1 and the second tube segment 2 and a first bend 5 is formed to curve outward, a 40-55° included angle θ2 is formed between the second tube segment 2 and the third tube segment 3 and a second bend 6 is formed to curve inward, a 130-140° included angle θ3 is formed between the third tube segment 3 and the fourth tube segment 4 and a third bend 7 is formed to curve outward, a length L1 = 1.5-2.5 cm is formed between the first bend 5 and the second bend 6, a length L2 = 2-3 cm is formed between the second bend 6 and the third bend 7, and a length L3 = 2-8 mm is formed between the third bend 7 and the distal end of the fourth tube segment 4.

[0025] The first bend 5, the second bend 6 and the third bend 7 of the inner tube 10 are arranged in accordance with the anatomical structure of the type III aortic arch and the vessels above the arch. The first bend 5 curves outward, so that the distal end of the inner tube runs in the direction of the vessels above the arch, assisting the second bend 6 to enter the vessels. The second bend 6 curves inward, the main purpose being a single-bend shape, facilitating the selection of the openings of the vessels above the arch. The third bend 7 is short and curves outward, the main purpose being to conform to the running direction of the vessels, effectively preventing the tube head (distal end of the tube) from hitting the vessel wall during the contrast process.

[0026] The length between the first bend 5 and the second bend 6 of the inner tube 10 is set to 1.5-2.5 cm, and the length between the second bend 6 and the third bend 7 is set to 2-3 cm, so that the inner tube can maintain its natural curved shape after being pushed by the guide wire 30 in the type III aortic arch and enter each of the vessels above the arch, i.e. it can automatically form a loop in the aortic arch and can be directly superselected to the vessels above the arch, reducing the loop-forming step of the Simmons catheter, i.e. the inner tube does not need to be artificially shaped again.

[0027] The three bends of the inner tube 10 can adapt to the anatomical structure of the type III aortic arch and the vessels above the arch, and no additional loop-forming operation is required for the inner tube 10, i.e. the inner tube 10 of the present embodiment directly enters each of the vessels above the arch by using its original shape under the pushing of the guide wire 30, without any change to its original shape.

[0028] In addition, the inner tube 10 can also be used alone for the type I aortic arch. The type I aortic arch is a term known to those skilled in the art, which refers to a distance from the top tangent of the aortic arch to the starting portion of the brachiocephalic trunk being equal to or less than the width of the brachiocephalic trunk. Therefore, the starting portions of the brachiocephalic trunk, the left common carotid artery and the left subclavian artery of the type I aortic arch are substantially located in the same plane.

[0029] The type I aortic arch is relatively small and the operation process is relatively simple. However, the shape of the existing angiography catheter is too complex, and it is often necessary to form a loop in the type I aortic arch and to disengage the loop. The inner tube 10 is particularly suitable for performing angiography in the type I aortic arch. After the inner tube 10 is pushed in the type I aortic arch by the guide wire 30, the inner tube 10 can be used for angiography by maintaining its natural curved shape, that is, it can automatically form a loop in the type I aortic arch, and it can be directly super-selected to the blood vessels above the arch, thereby reducing the loop-forming step of the Simmons catheter, that is, it is not necessary to artificially shape the angiography catheter, thereby reducing the operation difficulty, shortening the operation time, reducing the operation risk, reducing the possibility of complications, and increasing the comfort of the patient after the operation.

[0030] When the inner tube 10 is used for angiography in the type I aortic arch, the guide wire 30 passes through the inner tube 10 to send the inner tube 10 to the ascending aorta. After the guide wire 30 is withdrawn, the three bends of the inner tube 10 are automatically formed, the catheter head is turned to the left side, and the catheter is withdrawn. The tube head can be sequentially introduced into the left subclavian artery and the left common carotid artery. When the right common carotid artery is operated, the catheter head is turned to the right side, the catheter is withdrawn to the brachiocephalic trunk, the guide wire 30 is selected into the right common carotid artery, and then the catheter is withdrawn. The catheter can enter the right common carotid artery along the guide wire 30, and finally the catheter is withdrawn to the right subclavian artery near the vertebral artery opening. The above operation omits the loop-forming process of the catheter, and the blood vessels above the arch can be directly super-selected.

[0031] In this embodiment, the hardness of the outer tube 20 is less than the hardness of the inner tube 10, so that the outer tube 20 can move along the inner tube 10. That is, the inner tube 10 plays a supporting and guiding role, and is used to guide the outer tube 20 to move in accordance with the shape of the inner tube 10. For example, the material of the inner tube 10 can be made of relatively hard Cordis Johnson angiography catheter material, and the material of the outer tube 20 can be made of relatively soft COOK angiography catheter material.

[0032] Based on the characteristics of the type III aortic arch, the catheter for angiography of the type III aortic arch needs to have a larger diameter, so it is different from the type I aortic arch. The inner tube 10 cannot directly perform angiography on the type III aortic arch, but a larger-diameter outer tube 20 needs to be selected for angiography. However, since the type III aortic arch is relatively complex, and the larger the diameter of the catheter, the more inconvenient the operation is. In order to avoid the loop-forming operation of the catheter in the type III aortic arch, the inner tube 10 is used to guide the outer tube 20 in this embodiment, so that the outer tube 20 moves along the inner tube 10 during the angiography. In this way, not only does the inner tube 10 itself not need to be loop-formed, but also the outer tube 20 along the inner tube 10 does not need to be loop-formed, so the entire angiography catheter does not need to be loop-formed.

[0033] As shown in FIG. 6, the inner tube 10 is used to guide the outer tube 20 to move along the inner tube 10 during the angiography, so that the outer tube 20 can be used for angiography in the type III aortic arch. The inner tube 10 is used to guide the outer tube 20 to move along the inner tube 10 during the angiography, so that the outer tube 20 can be used for angiography in the type III aortic arch. Figures 3 to 6As shown, when the contrast catheter of the present embodiment is used to perform a contrast operation on the type III aortic arch, the inner tube 10 is first guided by the guide wire 30, and the inner tube 10 enters each of the supra-aortic vessels one by one, and the outer tube 20 also enters each of the supra-aortic vessels one by one along the shape of the inner tube 10, when the outer tube 20 enters the predetermined supra-aortic vessel, the guide wire 30 and the inner tube 10 are withdrawn in turn, and then the outer tube 20 can be used to inject contrast agent into the blood vessel.

[0034] The present embodiment uses the outer tube 20 to cover the inner tube 10 to perform the contrast, and the shape of the inner tube 10 itself is designed to make the inner tube 10 more easily enter each of the supra-aortic vessels, and the outer tube 20 can advance along the inner tube 10, so that the outer tube 20 can enter each of the supra-aortic vessels without being twisted, and the operation of twisting, deforming, etc. of the outer tube 20 in the aortic arch is avoided, the step of twisting the outer tube 20 is omitted, the operation difficulty is reduced, the operation time is shortened, the operation risk is reduced, the possibility of complications of the operation is reduced, and the comfort of the patient after the operation is increased.

[0035] The above detailed description is only for the preferred embodiment of the present application, and does not limit the patent scope of the present application, therefore, any equivalent technical changes made by using the content of the present application are included in the patent scope of the present application.

Claims

1. A right radial artery type III aortic arch full cerebral angiography catheter, characterized in that, The application relates to a catheter for aortic arch imaging, which comprises an inner tube and an outer tube. The inner tube comprises a first tube segment, a second tube segment, a third tube segment and a fourth tube segment connected in sequence from a proximal end to a distal end, a 135-145-degree angle is formed between the first tube segment and the second tube segment, a first bend is formed to curve outward, a 40-55-degree angle is formed between the second tube segment and the third tube segment, a second bend is formed to curve inward, a 130-140-degree angle is formed between the third tube segment and the fourth tube segment, a third bend is formed to curve outward, the length between the first bend and the second bend is 1.5-2.5 cm, the length between the second bend and the third bend is 2-3 cm, and the length between the third bend and the end of the fourth tube segment is 2-8 mm; the first bend, the second bend and the third bend of the inner tube conform to the anatomical structure of a type III aortic arch and vessels above the arch; and the inner tube is suitable for being used alone for a type I aortic arch and is not suitable for directly imaging a type III aortic arch, the inner tube can be imaged after being pushed by a guide wire in the type I aortic arch and keeping the natural curved shape; The outer tube is coaxially sleeved outside the inner tube, the hardness of the outer tube is smaller than that of the inner tube, so that the outer tube can move along the inner tube to image the type III aortic arch without being coiled in the type III aortic arch; The inner tube is pushed by a guide wire in the type III aortic arch and keeps the natural curved shape to enter each vessel above the arch of the type III aortic arch without being coiled, so that the outer tube also enters each vessel above the arch of the type III aortic arch without being coiled; The type I aortic arch refers to the distance from the top tangent of the aortic arch to the starting part of the brachiocephalic trunk being equal to or smaller than the width of the brachiocephalic trunk, and the type III aortic arch refers to the distance from the top tangent of the aortic arch to the starting part of the brachiocephalic trunk being equal to 3 times or more the width of the brachiocephalic trunk.

2. The right radial artery type III aortic arch total cerebral angiography catheter according to claim 1, characterized in that: The total length of the inner tube is 120-130 cm, and the total length of the outer tube is 85-95 cm.

3. The right radial artery type III aortic arch total cerebral angiography catheter according to claim 1, characterized in that: The tube diameter of the inner tube is 4F, and the tube diameter of the outer tube is 6F.

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