Angiographic catheter and guide device

Abstract

The invention relates to the technical field of medical instruments, and discloses an angiographic catheter and a guiding device.The angiographic catheter comprises a far-end structure, a near-end structure and a transition structure, by arranging the transition structure, the section is made in the length direction perpendicular to the transition structure, and the width size of a first transition section gradually increases from one end to the other end; the guiding catheter is arranged on the outer side between the other end of the first transition section and the near-end structure in a sleeving mode. When the angiographic catheter drives the guide catheter to pass through a small, tortuous or spasm position of a blood vessel, the first transition section can gradually open the tortuous or spasm position of the blood vessel, so that the guide catheter can smoothly pass through the position without causing damage to the blood vessel. On the basis, the angiographic catheter not only can carry out angiographic operation, but also can carry out guiding operation on the guiding catheter, other extra instruments do not need to be used, time can be saved, meanwhile, the operation cost can be reduced, and the technical effect of reducing the probability of operative complications can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an angiography catheter and a guiding device. Background Art

[0002] Percutaneous Coronary Intervention (PCI) is mainly used to treat obstructive coronary artery disease. It has developed rapidly due to its advantages of minimally invasive, time-saving, safe and efficient, and has become an important treatment for obstructive coronary artery disease. In addition, PCI has a high surgical success rate and good efficacy for diseases such as left main coronary artery lesions, chronic total occlusion lesions, and severe calcified lesions.

[0003] At present, PCI via radial artery has become the preferred vascular route. During the operation, the placement of the guide catheter is the first step in coronary intervention and one of the key factors for the success of coronary intervention. The main function of the guide catheter is to deliver interventional treatment devices and monitor the pressure in the coronary artery.

[0004] Specifically, a 0.035-inch-outer-diameter angiographic guidewire is first inserted into the path vessel through the arterial sheath until the tip of the angiographic guidewire reaches the ascending aorta, and then the guiding catheter is guided by the angiographic guidewire through the vascular path to reach the ascending aorta. In this process, when the path vessel is small, spasmodic, or tortuous, the tip of the guiding catheter is flexible, and forcibly pushing the guiding catheter will cause the tip of the guiding catheter to deform and appear in a sharp position, further producing a "plowing effect", that is, the guiding catheter not only cannot smoothly pass through the path vessel to reach the ascending aorta, but the sharp position of the guiding catheter will also cause damage or even rupture of the path vessel, and further lead to compartment syndrome, vascular complications of vascular occlusion, and the like.

[0005] When the guiding catheter encounters small, spasmodic or tortuous blood vessels, the following methods are commonly used to solve the problem:

[0006] 1. Changing the surgical path: This method will expand the scope of surgical trauma, increase the possibility of surgical vascular complications, and increase the cost of surgical treatment. At the same time, the changed surgical path may also cause the "furrow effect";

[0007] 2. Twisting and pushing: The guiding catheter is gently turned left and right along the angiographic guide wire. This method has a low success rate and is likely to aggravate the degree of vascular damage and the patient's pain, increase the chance of radial artery occlusion, and cause vascular endothelial damage and vagus nerve reflex.

[0008] 3. Requires additional assistance from other instruments: additional use of balloon catheters and finger guidewires with an outer diameter of 0.014 inches. Specifically, after the finger guidewire passes through the vascular path, the guide catheter with the auxiliary balloon catheter inside is guided through the small, spasmodic or tortuous position of the path blood vessels, and then the angiographic guidewire with an outer diameter of 0.035 inches is replaced to guide the guide catheter to the ascending aorta. This method is complicated to operate, and the auxiliary instruments not only increase the cost of the operation, but also increase the time for balloon catheter expansion, resulting in extended operation time and increased surgical risks. Summary of the invention

[0009] In view of this, the present invention provides an angiography catheter and a guiding device to solve the problem of the existing percutaneous coronary intervention treatment, which requires replacing the access route of the guiding catheter, or pushing the guiding catheter by twisting, or guiding by an additional guiding guide wire and balloon catheter, which not only increases the operation cost and operation time, but also causes vascular complications of the interventional surgery.

[0010] In a first aspect, the present invention provides an angiography catheter, comprising:

[0011] A distal structure, wherein a first channel is provided in the distal structure, and one end of the first channel is used for communicating with the outside world;

[0012] A proximal structure is spaced apart from the distal structure, a second channel is provided in the proximal structure, and one end of the second channel is used to communicate with the outside;

[0013] A transition structure is connected between the distal structure and the proximal structure, and the transition structure includes a first gradient section, one end of which is connected to the distal structure, a third channel is provided in the first gradient section, one end of the third channel is connected to the other end of the first channel, and a cross section is made along a length direction perpendicular to the transition structure, and the width dimension of the first gradient section gradually increases from one end to the other end, and the outer side between the other end of the first gradient section and the proximal structure is used for sleeve installation of a guide catheter, and the first gradient section is used to guide the movement of the guide catheter.

[0014] Beneficial effect: By setting a transition structure, a cross section is made along the length direction perpendicular to the transition structure, and the width dimension of the first gradient section gradually increases from one end to the other end, and the guide catheter is set on the outside between the other end of the first gradient section and the proximal structure. When the angiography catheter drives the guide catheter through the small, tortuous or spasmodic position of the blood vessel, the first gradient section can gradually deform the small, tortuous or spasmodic part of the blood vessel, while avoiding deformation of the guide catheter head and the "plowing effect", so that the guide catheter can pass through the position smoothly without causing damage to the blood vessel. Based on this, the angiography catheter can perform angiography operations and guide operations on the guide catheter, without the need for other operations in the relevant technology, that is, without changing the surgical path, without twisting and pushing, and without the need for the assistance of other instruments. Only the angiography catheter can pass through the small, tortuous or spasmodic position of the blood vessel, which can not only save time, but also reduce surgical costs, and also achieve the technical effect of reducing the probability of surgical complications.

[0015] In an optional embodiment, the transition structure includes a second gradient section, one end of which is connected to the proximal structure, a fourth channel is provided in the second gradient section, one end of the fourth channel is connected to the other end of the second channel, the other end of the fourth channel is connected to the other end of the third channel, and a cross section is made along a length direction perpendicular to the transition structure, and the width dimension of the second gradient section gradually increases from one end to the other end.

[0016] Beneficial effect: By setting the second gradient section, the smoothness of the size transition between the proximal structure and the transition structure can be increased. When the angiography catheter is in the process of angiography, it can avoid the situation where the size mutation between the proximal structure and the transition structure causes damage to the blood vessel, thereby achieving the technical effect of improving the protection of the blood vessel.

[0017] In an optional embodiment, the transition structure includes a connecting section, which is connected between the first gradient section and the second gradient section. A fifth channel is provided in the connecting section, and the fifth channel is connected between the third channel and the fourth channel. The cross section is made along a length direction perpendicular to the transition structure. The width dimension of the connecting section remains unchanged, and the outer side of the connecting section is used for sleeve mounting the guide catheter.

[0018] Beneficial effect: By setting the connecting section, the connecting section is connected between the first gradient section and the second gradient section, that is, along the length direction perpendicular to the transition structure, the connecting section is connected to the maximum width of the first gradient section, and at the same time, the connecting section is connected to the maximum width of the second gradient section, and the maximum width of the first gradient section is equal to the width of the connecting section and the maximum width of the second gradient section. Based on this, when the guiding catheter needs to be sleeved at the maximum width of the first gradient section and the maximum width of the second gradient section, the guiding catheter is sleeved on the connecting section, which can increase the connection area between the guiding catheter and the connecting section, thereby achieving the technical effect of improving the stability of the connection position between the guiding catheter and the angiography catheter.

[0019] In an optional embodiment, at the connection between the first gradient section and the connecting section, the first gradient section and the connecting section have the same size;

[0020] and / or, at the connection point between the second gradient section and the connecting section, the second gradient section and the connecting section have the same size;

[0021] And / or, taking a cross section along a direction perpendicular to the length of the transition structure, the first gradient section and the second gradient section are in a trapezoidal shape.

[0022] Beneficial effect: By limiting that the first gradient section and the connecting section have the same size at the connection, and the second gradient section and the connecting section have the same size at the connection, the smoothness of the connection between the transition structure and the first gradient section and the connection between the transition structure and the second gradient section can be increased, avoiding the connection between the transition structure and the first gradient section and the connection between the transition structure and the second gradient section. The connection is different in size, which may cause scratches on the blood vessels, so as to achieve the technical effect of enhancing the protection of the blood vessels;

[0023] Compared with making a cross section along the length direction perpendicular to the transition structure, the upper and lower sides of the first gradient segment and the upper and lower sides of the second gradient segment are arc-shaped. By limiting the cross section to be made along the length direction perpendicular to the transition structure, the shapes of the first gradient segment and the second gradient segment are trapezoidal, which makes the shape processing of the first gradient segment and the second gradient segment simpler, and can achieve the technical effect of improving the simplicity of angiography catheter production.

[0024] In an optional embodiment, the first gradient section and the distal structure, and / or the second gradient section and the proximal structure are fixedly connected.

[0025] Beneficial effect: By limiting the fixed connection between the first gradient section and the distal structure, and between the second gradient section and the proximal structure, the technical effect of the stability of the connection between the first gradient section and the distal structure, and between the second gradient section and the proximal structure can be improved.

[0026] In an optional embodiment, the first gradient section and the distal structure, and / or the second gradient section and the proximal structure are integrated structures.

[0027] Beneficial effect: By defining the first gradient section and the distal structure, and the second gradient section and the proximal structure as an integrated structure, the technical effect of improving the stability and reliability of the connection between the first gradient section and the distal structure, and between the second gradient section and the proximal structure can be further achieved.

[0028] In an optional embodiment, the inner wall of the first channel, and / or the inner wall of the second channel, and / or the inner wall of the third channel, and / or the inner wall of the fourth channel, and / or the inner wall of the fifth channel is provided with a first lubricating coating.

[0029] Beneficial effect: The first lubricating coating can increase the lubricity inside the angiography catheter. When the angiography catheter is used for angiography, contrast fluid needs to be injected into the catheter. At this time, the first lubricating coating can reduce the flow resistance of the contrast fluid, thereby achieving the technical effect of increasing the flow speed and flow efficiency of the contrast fluid.

[0030] In an optional embodiment, a second lubricating coating is provided on the outer side of the distal structure, and / or the outer side of the proximal structure, and / or the outer side of the transition structure.

[0031] Beneficial effect: The second lubricating coating can reduce the friction force of the angiographic catheter entering the blood vessel, thereby improving the smoothness of the angiographic catheter entering the blood vessel and avoiding damage to the blood vessel, thereby achieving the technical effect of enhancing the protection of the blood vessel.

[0032] In a second aspect, the present invention further provides a guiding device, comprising:

[0033] The angiography catheter described above;

[0034] A guiding catheter is sleeved at a position between the other end of the first gradient section and the proximal structure.

[0035] Beneficial effect: When the guiding catheter is sleeved at a position between the other end of the first gradient section and the proximal structure, that is, the guiding catheter is arranged on the connecting section or the second gradient section, the movement path of the guiding catheter can be guided through the first gradient section, so that the guiding catheter can gradually pass through the small, tortuous or spasmodic position of the blood vessel without damaging the blood vessel, thereby achieving the technical effect of improving the convenience of the guiding catheter passing through the small, tortuous or spasmodic position of the blood vessel.

[0036] In an optional embodiment, a sixth channel is provided in the guiding catheter, and an inner wall of the sixth channel is arranged to fit with an outer wall of the transition structure.

[0037] Beneficial effect: By limiting the sixth channel to fit the outer wall of the transition structure, that is, the sixth channel can be tightly sleeved on the outer wall of the transition structure, the technical effect of improving the stability of the connection between the guiding catheter and the transition structure can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 is a schematic diagram of the structure of the angiography catheter in this embodiment;

[0040] Figure 2 Schematic diagram of the structure of the guiding device in this embodiment.

[0041] Description of reference numerals:

[0042] 1. Distal structure; 2. Proximal structure;

[0043] 3. Transition structure; 301. First gradient section; 302. Second gradient section; 303. Connecting section;

[0044] 4. Guide catheter. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0046] Combine the following Figure 1 to Figure 2 , describing an embodiment of the present invention.

[0047] According to an embodiment of the present invention, on the one hand, a radiographic catheter is provided, the radiographic catheter comprising:

[0048] A distal structure 1, wherein a first channel is provided in the distal structure 1, and one end of the first channel is used for communicating with the outside world;

[0049] The proximal structure 2 is spaced apart from the distal structure 1, and a second channel is provided in the proximal structure 2, and one end of the second channel is used to communicate with the outside;

[0050] The transition structure 3 is connected between the distal structure 1 and the proximal structure 2. The transition structure 3 includes a first gradient section 301. One end of the first gradient section 301 is connected to the distal structure 1. A third channel is provided in the first gradient section 301. One end of the third channel is connected to the other end of the first channel. A cross section is made along a length direction perpendicular to the transition structure 3. The width dimension of the first gradient section 301 gradually increases from one end to the other end. The outer side between the other end of the first gradient section 301 and the proximal structure 2 is used to set the guide catheter 4. The first gradient section 301 is used to guide the movement of the guide catheter 4.

[0051] In the angiography catheter of the present embodiment, a transition structure 3 is provided and a cross section is made along a length direction perpendicular to the transition structure 3. The width dimension of the first gradient section 301 from one end connected to the distal structure 1 gradually increases toward the other end, and the guide catheter 4 is sleeved on the outside between the other end of the first gradient section 301 and the proximal structure 2. In this way, when the angiography catheter drives the guide catheter 4 through a position where the blood vessel is small, tortuous or spasmodic, the first gradient section 301 can gradually deform the small, tortuous or spasmodic part of the blood vessel, while avoiding deformation of the head end of the guide catheter 4 and the occurrence of a "plowing effect", so that the guide catheter 4 can pass through the position smoothly without causing damage to the blood vessel. Based on this, the angiography catheter can perform angiography operations through the first channel, the second channel and the third channel. When the angiography operation is completed, the angiography catheter can also perform guiding operations on the guide catheter 4. No other operations in the relevant technology are required, that is, there is no need to change the surgical path, no need to twist and push, and no need to use additional assistance from other instruments. Only through the angiography catheter, it is possible to pass through small, tortuous or spasmodic blood vessels. It can not only save time, but also reduce surgical costs, and can also achieve the technical effect of reducing the probability of surgical complications.

[0052] Among them, the angiography catheter of this embodiment is used in percutaneous coronary intervention treatment, which can perform surgical treatment without changing the intervention route, and at the same time can achieve the technical effect of reducing complications related to the radial artery route.

[0053] Of course, in other embodiments, the angiography catheter can be used in other surgeries as needed.

[0054] In addition, one end of the first gradient section 301 is Figure 1 The left end of the first gradient section 301 is shown, and the other end of the first gradient section 301 is Figure 1 The length direction of the transition structure 3 refers to the right end of the first gradient section 301. Figure 1The horizontal direction shown in FIG. 1 is perpendicular to the length direction of the transition structure 3. Figure 1 Vertical orientation shown.

[0055] In this embodiment, when a cross section is made along a direction perpendicular to the length of the transition structure 3, the width of the distal structure 1 and the width of the proximal structure 2 remain unchanged. The width here is Figure 1 Of course, in other embodiments, according to different designs of the angiography catheter, a cross section is made along the length direction perpendicular to the transition structure 3, and the width dimensions of the distal structure 1 and the width dimensions of the proximal structure 2 are gradually set, which are all within the protection scope of the present invention.

[0056] In addition, in this embodiment, the distal end refers to the end of the angiography catheter and the guide catheter 4 located in the patient's body and away from the doctor during the operation, and the proximal end refers to the end of the angiography catheter and the guide catheter 4 close to the doctor during the operation.

[0057] In addition, combined Figure 1 As shown, the transition structure 3 includes a second gradient section 302, one end of the second gradient section 302, that is, the right end of the second gradient section 302 is connected to the proximal structure 2, a fourth channel is provided in the second gradient section 302, one end of the fourth channel is connected to the other end of the second channel, the other end of the fourth channel is connected to the other end of the third channel, and a cross section is made perpendicular to the length direction of the transition structure 3, and the width dimension of the second gradient section 302 gradually increases from one end to the other end. Among them, the other end of the second gradient section 302 is the left end of the second gradient section 302.

[0058] Of course, in other embodiments, depending on the design of the angiography catheter, the transition structure 3 may not include the second gradient section 302. Compared with other embodiments, the second gradient section 302 is provided in this embodiment to increase the smoothness of the size transition between the proximal structure 2 and the transition structure 3, without the need to improve the proximal structure 2 of the original angiography catheter. When the angiography catheter is in the process of angiography, it can avoid the situation where the sudden change in size between the proximal structure 2 and the transition structure 3 causes damage to the blood vessel, thereby achieving the technical effect of improving the protection of the blood vessel.

[0059] In addition, in this embodiment, the transition structure 3 includes a connecting section 303, which is connected between the first gradient section 301 and the second gradient section 302. A fifth channel is provided in the connecting section 303, and the fifth channel is connected between the third channel and the fourth channel. A cross section is made along a length direction perpendicular to the transition structure 3, and the width dimension of the connecting section 303 remains unchanged. The outer side of the connecting section 303 is used to sleeve the guiding catheter 4.

[0060] By setting the connecting section 303, the connecting section 303 is connected between the first gradient section 301 and the second gradient section 302, that is, along the length direction perpendicular to the transition structure 3, the connecting section 303 is connected to the maximum width of the first gradient section 301, and at the same time, the connecting section 303 is connected to the maximum width of the second gradient section 302, and the maximum width of the first gradient section 301 is equal to the width of the connecting section 303 and the maximum width of the second gradient section 302. Based on this, when the guiding catheter 4 needs to be sleeved at the maximum width of the first gradient section 301 and the maximum width of the second gradient section 302, the guiding catheter 4 is sleeved on the connecting section 303, which can increase the connection area between the guiding catheter 4 and the connecting section 303, thereby achieving the technical effect of improving the stability of the connection position between the guiding catheter 4 and the angiography catheter.

[0061] As a convertible implementation, the transition structure 3 may not include the connecting section 303 .

[0062] In addition, in this embodiment, at the connection between the first gradient section 301 and the connecting section 303, the first gradient section 301 and the connecting section 303 have the same size;

[0063] At the connection between the second gradient section 302 and the connecting section 303 , the second gradient section 302 and the connecting section 303 have the same size.

[0064] In other embodiments, according to the different designs of the angiography catheter, the sizes of the transition structure 3 and the first gradient section 301 may be different at the connection between the transition structure 3 and the first gradient section 301. The sizes of the transition structure 3 and the second gradient section 302 may be different at the connection between the transition structure 3 and the second gradient section 302. Compared with other embodiments, this embodiment can increase the smoothness of the connection between the transition structure 3 and the first gradient section 301, and the connection between the transition structure 3 and the second gradient section 302, and avoid the connection between the transition structure 3 and the first gradient section 301, and the connection between the transition structure 3 and the second gradient section 302. The connection between the transition structure 3 and the first gradient section 301, and the connection between the transition structure 3 and the second gradient section 302 are different in size, which easily causes scratches to the blood vessels, so as to achieve the technical effect of enhancing the protection of the blood vessels.

[0065] In addition, in this embodiment, a cross section is made along a direction perpendicular to the length of the transition structure 3, that is, Figure 1 In the cross section shown, the first gradient section 301 and the second gradient section 302 are in the shape of a trapezoid.

[0066] Of course, in other embodiments, according to different designs of the angiographic catheter, the shapes of the first gradient section 301 and the second gradient section 302 can be adjusted by making a cross section along the length direction perpendicular to the transition structure 3. For example, the upper and lower sides of the first gradient section 301 and the upper and lower sides of the second gradient section 302 can be arc-shaped. Compared with other embodiments, the shape processing of the first gradient section 301 and the second gradient section 302 in this embodiment is simpler, which can achieve the technical effect of improving the simplicity of manufacturing the angiographic catheter.

[0067] In other embodiments, depending on the design of the angiography catheter, it can be limited to the connection between the transition structure 3 and the first gradient section 301, and the transition structure 3 and the first gradient section 301 have the same size, or limited to the connection between the transition structure 3 and the second gradient section 302, and the transition structure 3 and the second gradient section 302 have the same size, or limited to making a cross section along the length direction perpendicular to the transition structure 3, and the shape of the first gradient section 301 and the second gradient section 302 is a trapezoid.

[0068] In addition, in this embodiment, the first gradient section 301 and the distal structure 1, and the second gradient section 302 and the proximal structure 2 are fixedly connected. Based on this, the technical effect of the stability of the connection between the first gradient section 301 and the distal structure 1, and between the second gradient section 302 and the proximal structure 2 can be improved.

[0069] Preferably, the first gradient section 301 and the distal structure 1, and the second gradient section 302 and the proximal structure 2 are integrated structures. Based on this, the technical effect of improving the stability and reliability of the connection between the first gradient section 301 and the distal structure 1, and between the second gradient section 302 and the proximal structure 2 can be further achieved.

[0070] Of course, in other embodiments, only the first gradient section 301 and the distal structure 1 may be fixedly connected, or only the second gradient section 302 and the proximal structure 2 may be fixedly connected. At the same time, only the first gradient section 301 and the distal structure 1 may be integrated, or only the second gradient section 302 and the proximal structure 2 may be integrated.

[0071] In other embodiments, the distal structure 1 and the first gradient section 301 and the proximal structure 2 and the second gradient section 302 are detachably connected, so that the transition structure 3, the distal structure 1 and the proximal structure 2 can be replaced as needed. Specifically, the distal structure 1 and the first gradient section 301 and the proximal structure 2 and the second gradient section 302 are detachably connected by threads. Of course, the detachable connection between the distal structure 1 and the first gradient section 301 and the proximal structure 2 and the second gradient section 302 can be adjusted according to the different designs of the angiography catheter.

[0072] In addition, in this embodiment, the inner wall of the first channel, the inner wall of the second channel, the inner wall of the third channel, the inner wall of the fourth channel and the inner wall of the fifth channel are all provided with a first lubricating coating. The first lubricating coating can increase the lubrication inside the angiography catheter. When the angiography catheter is performing an angiography operation, contrast fluid needs to be injected into the angiography catheter. At this time, the flow resistance of the contrast fluid can be reduced by the first lubricating coating, thereby achieving the technical effect of improving the flow speed and flow efficiency of the contrast fluid.

[0073] Furthermore, the outer side of the distal structure 1, the outer side of the proximal structure 2 and the outer side of the transition structure 3 are all provided with a second lubricating coating. The outer side is the side where the angiographic catheter can contact the blood vessel. The second lubricating coating can reduce the friction force of the angiographic catheter entering the blood vessel, thereby improving the smoothness of the angiographic catheter entering the blood vessel and avoiding damage to the blood vessel, thereby achieving the technical effect of improving the protection of the blood vessel.

[0074] The first lubricating coating and the second lubricating coating may be of the same type, both of which are polytetrafluoroethylene coatings. Of course, in other embodiments, the types of the first lubricating coating and the second lubricating coating may be different depending on the design of the angiographic catheter. At the same time, in other embodiments, the types of the first lubricating coating and the second lubricating coating may be adjusted, for example, the first lubricating coating and the second lubricating coating may be polyvinyl pyrrolidone coatings.

[0075] As a convertible embodiment, the inner wall of the first channel, the inner wall of the second channel, the inner wall of the third channel, the inner wall of the fourth channel and the inner wall of the fifth channel may not be provided with or may not be provided with the first lubricating coating, and at the same time, the outer side of the distal structure 1, the outer side of the proximal structure 2 and the outer side of the transition structure 3 may not be provided with or may not be provided with the second lubricating coating.

[0076] According to an embodiment of the present invention, on the other hand, a guiding device is provided, comprising:

[0077] The angiographic catheter of this embodiment;

[0078] The guiding catheter 4 is sleeved at a position between the other end of the first gradient section 301 and the proximal structure 2 .

[0079] When the guiding catheter 4 is sleeved at a position between the other end of the first gradient section 301 and the proximal structure 2, that is, the guiding catheter 4 is arranged on the connecting section 303 or the second gradient section 302, the movement path of the guiding catheter 4 can be guided by the first gradient section 301, so that the guiding catheter 4 can gradually pass through the tortuous or spasmodic position of the blood vessel without damaging the blood vessel, thereby achieving the technical effect of improving the convenience of the guiding catheter 4 in passing through the small, tortuous or spasmodic position of the blood vessel.

[0080] At the same time, when it is found that the guiding catheter 4 cannot pass through the radial artery smoothly, there is a possibility that the guiding catheter 4 has damaged the blood vessel. In the related technology, since the guide wire of the guiding catheter 4 and the guide wire of the balloon catheter are not universal, the guide wire of the guiding catheter 4 and the guiding catheter 4 need to be placed outside the patient's body and replaced with the guide wire of the balloon catheter. After the blood vessel is damaged, it will collapse and sag, resulting in the inability to insert the guide wire of the balloon catheter into the patient's body, affecting the operation and the patient's health. However, since the guide wire of the guiding catheter 4 can be the same as the guide wire of the angiography catheter, there is no need to replace the guide wire, thereby avoiding the collapse and sag of the blood vessel, allowing the percutaneous coronary intervention surgery to continue, thereby achieving the technical effect of reducing the risk of surgery.

[0081] Furthermore, a sixth channel is provided in the guiding catheter 4, and the inner wall of the sixth channel is arranged in abutment with the outer wall of the transition structure 3, that is, the outer wall of the connecting section 303 or the outer wall of the second gradient section 302. By limiting the sixth channel to be arranged in abutment with the outer wall of the transition structure 3, that is, the sixth channel can be tightly sleeved on the outer wall of the transition structure 3, the technical effect of improving the stability of the connection between the guiding catheter 4 and the transition structure 3 can be achieved.

[0082] Of course, in other embodiments, the size between the sixth channel and the transition structure 3 may be adjusted according to different designs of the guiding device.

[0083] Furthermore, a third lubricating coating is provided in the sixth channel, thereby reducing the friction force of other structures in the sixth channel entering the sixth channel, thereby achieving a technical effect of reducing the ease with which other structures in the sixth channel enter the sixth channel.

[0084] Specifically, the third lubricating coating is a polytetrafluoroethylene coating. As a convertible embodiment, the third lubricating coating may also be a polyvinyl pyrrolidone coating.

[0085] Of course, in other embodiments, the third lubricating coating may be partially provided in the sixth channel, that is, the third lubricating coating is not provided at the connection position between the sixth channel and the transition structure 3, and the third lubricating coating is provided at the position not connected between the sixth channel and the transition structure 3. As a convertible embodiment, the third lubricating coating may not be provided in the sixth channel.

[0086] Specifically, the following are application examples of the guidance device of this embodiment:

[0087] Case 1

[0088] The patient was a 59-year-old female with unstable angina, coronary atherosclerotic heart disease, grade 3 hypertension (very high risk), type 2 diabetes, hypercholesterolemia, and old cerebral infarction.

[0089] Coronary angiography was performed via the radial artery using the angiography catheter of this embodiment, indicating that the middle segment of the left anterior descending artery had a TIMI (Thrombolysis In Myocardial Infarction) blood flow grade II, the heaviest stenosis was 99%, the distal segment of the circumflex artery was occluded, and the TIMI blood flow grade was 0; the middle segment of the right coronary artery was occluded, and the TIMI blood flow grade was 0. The patient and his family refused bypass surgery, and planned to open the chronic occlusive lesion of the right coronary artery.

[0090] The specific process of the operation is as follows: a J-shaped guidewire with a diameter of 0.035 inches is sent to the aortic sinus to form a U-shaped guidewire, and the guiding catheter 4 is sent along the guidewire to the vicinity where the radial artery merges into the brachial artery. During this process, it is found that the resistance to the movement of the guiding catheter 4 is relatively large. At this time, the guiding catheter 4 can be withdrawn, and the guiding catheter 4 is sheathed on the angiography catheter, wherein the distal end of the angiography catheter is 5 cm away from the distal end of the guiding catheter 4. The angiography catheter and the guiding catheter 4 are inserted into the patient's body as a whole, and smoothly pass through the high resistance section of the peripheral artery to reach the ascending aorta.

[0091] Furthermore, after the J-shaped guidewire is fixed, the angiography catheter is removed, and then the percutaneous coronary intervention surgery is successfully completed through the guiding catheter 4.

[0092] After the percutaneous coronary intervention, the guiding catheter 4 was removed smoothly, and the puncture site was routinely bandaged. There was no swelling in the forearm and no obvious pain. When the patient was discharged from the hospital, there was no swelling in the forearm and no obvious pain.

[0093] Case 2

[0094] The patient was a 40-year-old male with acute non-ST-segment elevation myocardial infarction, clinical grade I heart failure caused by acute myocardial infarction, coronary atherosclerotic heart disease, and hypercholesterolemia;

[0095] The angiography catheter of this embodiment was used to complete coronary angiography via the radial artery, indicating that the most severe stenosis of the proximal and middle segments of the anterior descending branch was 99%, TIMI blood flow grade III, the most severe stenosis of the opening of the first diagonal branch was 95%, TIMI blood flow grade III, and the stenosis of the opening of the circumflex branch was 50%, TIMI blood flow grade III. Lesions of the anterior descending branch and the first diagonal branch are to be treated.

[0096] The specific process of percutaneous coronary intervention surgery is as follows: the guiding catheter 4 is moved to the vicinity of the elbow joint through a J-shaped guidewire with a diameter of 0.035 inches, and resistance is encountered. Radial artery angiography indicates radial artery tortuosity.

[0097] At this time, the guiding catheter 4 is pulled out and placed on the angiographic catheter, with the distal end of the angiographic catheter and the guiding catheter 4 being 10 cm apart. The angiographic catheter and the guiding catheter 4 are inserted into the patient's body as a whole, and smoothly pass through the elbow joint resistance section to reach the ascending aorta.

[0098] Furthermore, after the J-shaped guidewire is fixed, the angiography catheter is removed, and then the left coronary opening is reached through the guiding catheter 4, and the percutaneous coronary intervention surgery is successfully completed.

[0099] After the percutaneous coronary intervention, the guiding catheter 4 was removed smoothly, and the puncture site was routinely bandaged. There was no swelling in the forearm and no obvious pain. When the patient was discharged from the hospital, there was no swelling in the forearm and no obvious pain.

[0100] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An angiographic catheter, characterized in that: include: A distal structure (1), wherein a first channel is provided in the distal structure (1), and one end of the first channel is used for communicating with the outside world; A proximal structure (2) is spaced apart from the distal structure (1), wherein a second channel is provided in the proximal structure (2), and one end of the second channel is used for communicating with the outside; A transition structure (3) is connected between the distal structure (1) and the proximal structure (2), and the transition structure (3) includes a first gradient section (301), one end of the first gradient section (301) is connected to the distal structure (1), a third channel is provided in the first gradient section (301), one end of the third channel is connected to the other end of the first channel, and a cross section is made along a length direction perpendicular to the transition structure (3), the width dimension of the first gradient section (301) gradually increases from one end to the other end, the outer side between the other end of the first gradient section (301) and the proximal structure (2) is used to set a guide catheter (4), and the first gradient section (301) is used to guide the movement of the guide catheter (4).

2. The angiography catheter according to claim 1, characterized in that: The transition structure (3) comprises a second gradient section (302), one end of which is connected to the proximal structure (2), a fourth channel is arranged in the second gradient section (302), one end of the fourth channel is connected to the other end of the second channel, the other end of the fourth channel is connected to the other end of the third channel, and a cross section is made along a direction perpendicular to the length of the transition structure (3), and the width dimension of the second gradient section (302) gradually increases from one end to the other end.

3. The angiography catheter according to claim 2, characterized in that: The transition structure (3) comprises a connecting section (303), wherein the connecting section (303) is connected between the first gradient section (301) and the second gradient section (302), wherein a fifth channel is arranged in the connecting section (303), wherein the fifth channel is connected between the third channel and the fourth channel, and wherein a cross section is made along a direction perpendicular to the length of the transition structure (3), wherein the width dimension of the connecting section (303) remains unchanged, and the outer side of the connecting section (303) is used for sleeve-mounting the guiding catheter (4).

4. The angiography catheter according to claim 3, characterized in that: At the connection point between the first gradient section (301) and the connecting section (303), the first gradient section (301) and the connecting section (303) have the same size; and / or, at the connection point between the second gradient section (302) and the connecting section (303), the second gradient section (302) and the connecting section (303) have the same size; And / or, taking a cross section along a direction perpendicular to the length of the transition structure (3), the first gradual transition section (301) and the second gradual transition section (302) are in a trapezoidal shape.

5. The angiography catheter according to claim 3, characterized in that: The first gradient section (301) and the distal structure (1), and / or the second gradient section (302) and the proximal structure (2) are fixedly connected.

6. The angiography catheter according to claim 5, characterized in that: The first gradient section (301) and the distal structure (1), and / or the second gradient section (302) and the proximal structure (2) are integrated structures.

7. The angiography catheter according to any one of claims 3 to 6, characterized in that: The inner wall of the first channel, and / or the inner wall of the second channel, and / or the inner wall of the third channel, and / or the inner wall of the fourth channel, and / or the inner wall of the fifth channel is provided with a first lubricating coating.

8. The angiography catheter according to any one of claims 1 to 6, characterized in that: The outer side of the distal structure (1), and / or the outer side of the proximal structure (2), and / or the outer side of the transition structure (3) is provided with a second lubricating coating.

9. A guiding device, characterized in that: include: The angiography catheter according to any one of claims 1 to 8; A guiding catheter (4), wherein the guiding catheter (4) is sleeved at a position between the other end of the first gradient section (301) and the proximal structure (2).

10. The guiding device according to claim 9, characterized in that: A sixth channel is provided in the guiding catheter (4), and the inner wall of the sixth channel is arranged to fit the outer wall of the transition structure (3).

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