Guiding extension catheter with balloon structure

Abstract

The invention discloses a guide extension catheter with a balloon structure, and relates to the technical field of medical instruments, the guide extension catheter comprises a guide tube, an extension tube is slidably connected in the guide tube in a penetrating manner, a through hole is formed in the extension tube, and the guide extension catheter further comprises a self-adaptive expansion mechanism and a synchronous inflation mechanism; the self-adaptive expansion mechanism comprises a balloon body, an inflation tube, an inflator pump, a threaded air pushing rod and a handle, the balloon body is fixedly connected to the position, close to the through hole, of the outer surface of the extension tube, a PET woven layer is arranged at the center of the inner wall of the balloon body, and silicone rubber woven layers are arranged on the two sides of the inner wall of the balloon body. According to the balloon, the balloon body is expanded from the two sides firstly, then the balloon body is gradually and stably expanded towards the center along with continuous injection of gas, expansion force can be distributed more evenly, pressure borne by the vascular wall on all the portions is more balanced, the risk that local pressure is too large is reduced, and the possibility that the vascular wall is damaged is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a guide extension catheter with a balloon structure. BACKGROUND

[0002] In the medical field, intravascular intervention therapy has become an important means for treating cardiovascular diseases, cerebrovascular diseases and the like. As a key instrument in the intervention therapy, the performance of the guide extension catheter directly affects the success rate and safety of the operation. The traditional guide extension catheter plays an important role in intravascular intervention therapy, but with the continuous development of the intervention therapy technology, higher requirements are put forward for the performance of the guide extension catheter.

[0003] The guide extension catheter disclosed in the existing patent No. CN110917465A is composed of an extension tube body, a gradually changing collar piece, a pushing rod and a handle which are fixedly connected in sequence. The gradually changing collar piece is a hollow circular table body with an inner cavity with gradually changing inner diameter in the axial direction. The proximal end of the extension tube body is fixedly connected with the distal end of the gradually changing collar piece, and the inner cavity of the extension tube body is in communication with the inner cavity of the gradually changing collar piece. The inner diameter (inner cavity diameter) of the distal end of the gradually changing collar piece is the same as the inner diameter of the extension tube body, and the inner diameter of the distal end of the gradually changing collar piece is larger than the inner diameter of the proximal end thereof. The guide extension catheter adopts the gradually changing collar piece at the proximal end of the extension tube body, so that seamless cooperation is formed with the inner cavity of the matching guide catheter, effectively avoiding the scratching and jamming of the guide wire, balloon and stent, and effectively improving the operation efficiency and success rate. Although the gradually changing collar piece is adopted at the proximal end of the extension tube body to form seamless cooperation with the inner cavity of the matching guide catheter, in the inflation process of the balloon, the inflation is first performed from the center to expand the blocked blood vessel. The inflation of the balloon from the center not only causes uneven stress on the blood vessel wall, but also causes larger expansion force at the center and smaller expansion force at the two sides. This causes larger pressure on the blood vessel wall at the center and insufficient pressure at the two sides, and uneven stress causes local damage to the blood vessel wall during the operation, even causes blood vessel dissection or rupture, increases the operation risk, and in the treatment of complex lesions such as tortuous blood vessels, calcification or severe stenosis, the inflation of the balloon from the center cannot effectively adhere to the lesion site, so that the expansion effect is poor, leading to operation failure or the need for additional instrument assistance, increasing the complexity and risk of the operation.

[0004] Therefore, the present application provides a guide extension catheter with a balloon structure to solve the above problems. SUMMARY

[0005] (I) Technical problems solved In view of the deficiencies of the prior art, the present application provides a guide extension catheter with a balloon structure, which can effectively solve the problems in the prior art.

[0006] (II) Technical solutions To achieve the above object, the object of the present application can be realized by the following technical scheme: A guide extension catheter with a balloon structure comprises a guide tube, a sliding connection of an extension tube is arranged inside the guide tube, a through hole is arranged on the extension tube, a self-adapting inflation mechanism and a synchronous inflation mechanism are further arranged, the self-adapting inflation mechanism comprises a balloon body, an inflation pipe, an inflation cylinder, a threaded air pushing rod and a handle, the balloon body is fixedly connected to the outer surface of the extension tube near the through hole, a PET braided layer is arranged at the center of the inner wall of the balloon body, a silicon rubber braided layer is arranged on both sides of the inner wall of the balloon body, the self-adapting inflation mechanism is used for gradually expanding from both sides to the center during the inflation of the balloon body, and the synchronous inflation mechanism is used for synchronously inflating from both ends of the balloon body.

[0007] As a further scheme of the present application: the inflation pipe is arranged inside the extension tube, a first inflation hole is arranged on the outer surface of the inflation pipe near the through hole, and the inflation pipe is connected to the inflation cylinder at the end away from the first inflation hole.

[0008] As a further scheme of the present application: the inflation cylinder is threadedly connected with the threaded air pushing rod at the end away from the inflation pipe, and the threaded air pushing rod is fixedly connected with the handle at the end away from the inflation cylinder.

[0009] As a further scheme of the present application: the synchronous inflation mechanism comprises an inflation head, the inflation head is fixedly connected to the inside of the extension tube near the through hole, a second inflation hole is arranged on the outer surface of the inflation head, and the second inflation hole is located on the side of the balloon body away from the inflation pipe.

[0010] As a further scheme of the present application: the inflation head is fixedly connected with a hose at the end near the inflation pipe, the hose is fixedly connected to the inflation pipe at the end away from the inflation head, and the inflation pipe is slidingly connected to the inside of the extension tube.

[0011] As a further scheme of the present application: the inflation pipe is fixedly connected with an extension column at the end away from the hose, the extension column is sleeved with a hollow pipe at the outer surface away from the inflation pipe, the extension column is slidingly connected to the hollow pipe, the hollow pipe is fixedly connected to the inflation cylinder at the end away from the extension column, and the inflation cylinder, the hollow pipe, the extension column and the inflation pipe are connected.

[0012] As a further scheme of the present application: a fixed plate is fixedly connected to the outer surface of the inflation cylinder, a moving ring is slidingly connected to the fixed plate, the moving ring is sleeved on the inflation cylinder, a scale bar is equidistantly fixedly connected to the upper end surface of the fixed plate, a connecting ring is rotatably connected to the outer surface of the moving ring, connecting plates are symmetrically fixedly connected to the side near the handle of the connecting ring, and the connecting plates are fixedly connected to the handle at the end away from the connecting ring.

[0013] As a further scheme of the present application: the mobile ring is symmetrically fixedly connected with connecting frames away from the handle side, two connecting frames are fixedly connected with a fixed ring away from the mobile ring side, and the fixed ring is fixedly connected to the outer surface of the inflation tube.

[0014] (Three) beneficial effects Compared with the prior art, the present application provides a guide extension catheter with a balloon structure, which has the following beneficial effects: 1. By setting the self-adaptive inflation mechanism, the inflation sequence of the balloon body first starts from both sides during the inflation process, and then gradually and smoothly expands to the center part as the gas continues to be injected. This not only can more evenly distribute the inflation force, making the pressure on the blood vessel wall more balanced at each part, reducing the risk of excessive local pressure and the possibility of blood vessel wall damage, but also helps to reduce local damage to the blood vessel wall and reduce the risk of blood vessel dissection or rupture, thereby reducing complications during surgery and improving the safety of surgery. In addition, when dealing with complex lesions such as tortuous, calcified or severely stenotic blood vessels, the first inflation of both sides can better fit the lesion site, ensuring full contact between the balloon and the lesion site, improving the expansion effect and reducing the risk of surgical failure. Wherein, by setting the both sides of the balloon body as a silicon rubber braid layer and the center as a PET braid layer, the softness of the silicon rubber braid layer can ensure that the both sides of the balloon body tightly fit the blood vessel wall, achieving more uniform expansion effect and effectively reducing the problem of uneven stress on the blood vessel wall. The high strength and anti-stretching properties of the PET braid layer at the center can prevent the balloon body from over-inflating, reducing the risk of blood vessel damage, dissection or rupture, and significantly improving the safety of surgery.

[0015] 2. By setting the threaded gas pushing rod, the distance of the threaded gas pushing rod sliding into the inflation tube can be accurately controlled when the gas inside the inflation cylinder is delivered to the inside of the balloon body through the inflation tube and the first inflation hole. This not only realizes precise control of the gas delivery amount, thereby ensuring the controllability of the balloon body inflation process, but also realizes the ordered inflation of the balloon body from both sides to the center by accurately controlling the gas delivery amount, avoiding uneven or excessive inflation caused by too fast or excessive gas delivery.

[0016] 3. Through the synchronous inflation mechanism, the tubing is squeezed during the inflation of the balloon body by the threaded push rod sliding into the inflation cylinder. The air inside the tubing is then simultaneously inflated from the other side of the balloon body through the inflation head and the second inflation port. This allows for simultaneous inflation of the balloon body from both sides, which not only more effectively dilates blood vessels, especially when dealing with complex lesions such as tortuous, calcified, or severely stenotic vessels, but also better conforms to the lesion site, improving the dilation effect. Furthermore, through more uniform inflation and better lesion adaptability, the balloon body can more effectively relieve vascular stenosis, improve the success rate of surgery, and reduce the possibility of further postoperative intervention.

[0017] 4. The scale strip on the upper surface of the fixed plate provides a direct reference for medical personnel. It not only allows them to accurately observe the distance the threaded push rod slides into the inflation cylinder, thereby achieving precise control over the inflation degree of the balloon body, but also ensures that different medical personnel can maintain consistent operating standards during operation, reducing operational errors caused by differences in personal experience and improving the standardization of the surgery. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the balloon body structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the extension tube of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram of region A in the middle; Figure 5 For the present invention Figure 3 Enlarged structural diagram of region B in the middle; Figure 6 For the present invention Figure 1 Enlarged structural diagram of the central air cylinder; Figure 7 For the present invention Figure 6 A magnified structural diagram of region C in the middle.

[0020] In the diagram: 1. Guide tube; 2. Extension tube; 301. Balloon body; 302. Inflation tube; 303. Inflation cylinder; 304. Threaded push rod; 305. Handle; 306. PET braided layer; 307. Silicone rubber braided layer; 308. First inflation port; 401, fixed ring; 402, hose; 403, inflation head; 404, second inflation hole; 405, hollow tube; 406, connecting frame; 407, moving ring; 408, connecting ring; 409, connecting plate; 410, fixed plate; 411, scale bar; 412, extension column; 5, through hole. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0022] The guiding extension catheter with a balloon structure in the embodiment comprises a guide tube 1, an extension tube 2 slidingly connected inside the guide tube 1, a through hole 5 formed on the extension tube 2, a self-adapting inflation mechanism, and a synchronous inflation mechanism. Figure 1 Figure 7 As shown in the figure, the guide tube 1 is internally connected with the extension tube 2 slidingly, the through hole 5 is formed on the extension tube 2, the self-adapting inflation mechanism comprises a balloon body 301, an inflation pipe 302, an inflation cylinder 303, a threaded air pushing rod 304, and a handle 305, the balloon body 301 is fixedly connected to the outer surface of the extension tube 2 near the through hole 5, a PET woven layer 306 is arranged at the center of the inner wall of the balloon body 301, and a silicon rubber woven layer 307 is arranged on both sides of the inner wall of the balloon body 301, the self-adapting inflation mechanism is used for gradually expanding from both sides to the center during the inflation of the balloon body 301.

[0023] As shown in the figure, the inflation pipe 302 is arranged inside the extension tube 2, a first inflation hole 308 is formed on the outer surface of the inflation pipe 302 near the through hole 5, and the end of the inflation pipe 302 away from the first inflation hole 308 is connected with the inflation cylinder 303, when air is delivered into the inflation pipe 302 through the inflation cylinder 303, the air will be delivered into the balloon body 301 through the first inflation hole 308 formed on the inflation pipe 302. Figure 3 Figure 4 Figure 6 As shown in the figure, the end of the inflation cylinder 303 away from the inflation pipe 302 is threadedly connected with the threaded air pushing rod 304, and the end of the threaded air pushing rod 304 away from the inflation cylinder 303 is fixedly connected with the handle 305, when the handle 305 is rotated to drive the threaded air pushing rod 304 to rotate, the threaded air pushing rod 304 can be rotated to slide into the inflation cylinder 303 or slide out of the inflation cylinder 303 through the threaded connection between the threaded air pushing rod 304 and the inflation cylinder 303.

[0024] As shown in the figure, the end of the inflation cylinder 303 away from the inflation pipe 302 is threadedly connected with the threaded air pushing rod 304, and the end of the threaded air pushing rod 304 away from the inflation cylinder 303 is fixedly connected with the handle 305, when the handle 305 is rotated to drive the threaded air pushing rod 304 to rotate, the threaded air pushing rod 304 can be rotated to slide into the inflation cylinder 303 or slide out of the inflation cylinder 303 through the threaded connection between the threaded air pushing rod 304 and the inflation cylinder 303. Figure 6

[0025] ​​​​In the prior art, during the inflation of the balloon, the inflation first occurs from the center to expand the blocked blood vessel. The inflation of the balloon from the center not only causes uneven stress on the blood vessel wall, with greater expansion force at the center and smaller expansion force at the two sides, but also causes greater pressure on the blood vessel wall at the center and insufficient pressure at the two sides, uneven stress during the operation process causing local damage to the blood vessel wall, even causing blood vessel dissection or rupture, increasing the risk of the operation. Moreover, when dealing with complex lesions such as tortuous blood vessels, calcification or severe stenosis, the balloon inflated from the center cannot effectively fit the lesion site, resulting in poor expansion effect, leading to operation failure or the need for additional instrument assistance, increasing the complexity and risk of the operation. Compared with the prior art, the inflation sequence of the balloon body 301 first expands from the two sides during the inflation process of the balloon body 301, and then, with the continuous injection of gas, the balloon body 301 gradually and smoothly expands to the center. This not only more evenly distributes the expansion force, making the pressure on the blood vessel wall more balanced at each part, reducing the risk of excessive local pressure and the possibility of blood vessel wall damage, but also helps to reduce local damage to the blood vessel wall and the risk of blood vessel dissection or rupture, thereby reducing complications during the operation process and improving the safety of the operation. Moreover, when dealing with complex lesions such as tortuous blood vessels, calcification or severe stenosis, the inflation of the two sides first can better fit the lesion site, ensuring full contact between the balloon and the lesion site, improving the expansion effect and reducing the risk of operation failure. Among them, by setting the two sides inside the balloon body 301 as a silicone rubber braid layer 307 and the center inside as a PET braid layer 306, the softness of the silicone rubber braid layer 307 can ensure that the two sides of the balloon body 301 closely fit the blood vessel wall, achieving more uniform expansion effect and effectively reducing the problem of uneven stress on the blood vessel wall. The high strength and anti-stretching properties of the PET braid layer 306 at the center can prevent the balloon body 301 from over-inflating, reducing the risk of blood vessel damage, dissection or rupture and significantly improving the safety of the operation.

[0026] In other aspects, the present embodiment also provides a synchronous inflation mechanism for synchronously inflating from both ends inside the balloon body 301, as shown in Figure 1 、 Figure 3 Figure 7 The synchronous inflation mechanism includes an inflation head 403 fixedly connected to the inside of the extension tube 2 near the through hole 5, and the inflation head 403 has a second inflation hole 404 opened on the outer surface, with the second inflation hole 404 located inside the balloon body 301 away from the inflation tube 302.

[0027] In the present embodiment, as shown in Figure 4 and Figure 5 ​As shown, the inflatable head 403 is fixedly connected with the hose 402 close to one end of the inflatable tube 302, the hose 402 is fixedly connected to the inflatable tube 302 away from the inflatable head 403, the inflatable tube 302 is slidably connected inside the extension tube 2, when the inflatable tube 302 slides close to the inflatable head 403, the hose 402 will be extruded to transport the air inside the hose 402 to the inflatable head 403, when the inflatable tube 302 is away from the inflatable head 403, the hose 402 will be pulled to restore to extract the air inside the hose 402.

[0028] In this embodiment, as shown in Figure 6 and Figure 7 As shown, the inflatable tube 302 is fixedly connected with the extension column 412 away from one end of the hose 402, the hollow tube 405 is sleeved on the outer surface of the extension column 412 away from the inflatable tube 302, the extension column 412 is slidably connected inside the hollow tube 405, the hollow tube 405 is fixedly connected to the inflator 303 away from one end of the extension column 412, the inflator 303, the hollow tube 405, the extension column 412 and the inflatable tube 302 are connected, when the inflatable tube 302 slides into the extension tube 2, the inflatable tube 302 will drive the extension column 412 to slide out of the hollow tube 405, by setting the extension column 412 and the hollow tube 405, the connection between the inflatable tube 302 and the inflator 303 can be maintained.

[0029] In this embodiment, as shown in Figure 6 As shown, the fixed plate 410 is fixedly connected to the outer surface of the inflator 303, the moving ring 407 is slidably connected to the fixed plate 410, the moving ring 407 is sleeved on the inflator 303, the scale bar 411 is equidistantly fixedly connected to the upper end surface of the fixed plate 410, the connecting ring 408 is rotatably connected to the outer surface of the moving ring 407, the connecting plate 409 is symmetrically fixedly connected to the connecting ring 408 close to one side of the handle 305, the connecting plate 409 is fixedly connected to the handle 305 away from one end of the connecting ring 408, when the handle 305 is rotated, the connecting plate 409 can drive the connecting ring 408 to rotate on the outer surface of the moving ring 407, at the same time, when the handle 305 moves, the handle 305 will push the moving ring 407 to slide on the fixed plate 410 through the connecting plate 409 and the connecting ring 408, and by observing the scale bar 411 corresponding to the moving ring 407, the distance moved by the moving ring 407 can be controlled and known.

[0030] In this embodiment, as shown in Figure 6 and Figure 7As shown, the moving ring 407 is fixedly connected with the connecting frame 406 on the side away from the handle 305, and the two connecting frames 406 are fixedly connected with the fixed ring 401 between the sides away from the moving ring 407, and the fixed ring 401 is fixedly connected to the outer surface of the inflation tube 302. When the moving ring 407 moves horizontally, the fixed ring 401 can be pushed to move synchronously by the connecting frame 406 arranged, so that the fixed ring 401 pushes the inflation tube 302 to slide into the inside of the extension tube 2, or slides out of the inside of the extension tube 2.

[0031] Compared with the prior art, the soft tube 402 can be extruded during the process of sliding the threaded air pushing rod 304 into the inside of the inflation cylinder 303 to inflate and expand the balloon body 301, and the air in the soft tube 402 is inflated synchronously from the other side of the balloon body 301 through the inflation head 403 and the second inflation hole 404, so that the balloon body 301 is inflated and expanded from both sides. Not only can the blood vessel be expanded more effectively, especially when dealing with complex lesions such as tortuous, calcified or severely stenotic blood vessels, the balloon body 301 can better fit the lesion site, improve the expansion effect, but also through more uniform expansion and better lesion adaptability, the balloon body 301 can more effectively relieve the blood vessel stenosis, improve the success rate of the operation, and reduce the possibility of further intervention after the operation.

[0032] The working process and principle involved in the above embodiment are as follows: When the medical staff needs to expand the blocked part of the patient's blood vessel, first put the guide tube 1 into the blood vessel, then put the extension tube 2 through the guide tube 1, and move the balloon body 301 on the outer surface of the extension tube 2 to the blocked part of the blood vessel. After the balloon body 301 moves to the blocked part, the staff can rotate the handle 305 to drive the threaded air pushing rod 304 to rotate. Through the threaded connection between the threaded air pushing rod 304 and the air cylinder 303, the threaded air pushing rod 304 can be rotated and slid into the air cylinder 303. At this time, the threaded air pushing rod 304 will transport the air in the inflation tube 302 to the inside of the balloon body 301 through the inflation tube 302, the first inflation hole 308 and the through hole 5 on the outer surface of the extension tube 2. Influenced by the PET woven layer 306 and the silicone rubber woven layer 307 inside the balloon body 301, the inflation sequence is first from both sides, and then, as the gas continues to be injected, the balloon body 301 will gradually and smoothly expand to the center. Not only can it more evenly distribute the expansion force, making the blood vessel wall more balanced in each part, reducing the risk of excessive local pressure and the possibility of blood vessel wall damage, but also the uniform expansion force helps to reduce the local damage of the blood vessel wall, reducing the risk of blood vessel dissection or rupture, thereby reducing the complications during the operation and improving the safety of the operation. When dealing with complex lesions such as blood vessel tortuosity, calcification or severe stenosis, the first inflation of both sides can better fit the lesion site, ensuring full contact between the airbag and the lesion site, improving the expansion effect and reducing the risk of surgical failure. During the inflation process of the balloon body 301, the softness of the silicone rubber woven layer 307 can ensure that the balloon body 301 is tightly attached to the blood vessel wall on both sides, achieving more uniform expansion effect and effectively reducing the problem of uneven stress on the blood vessel wall. The high strength and anti-stretching properties of the PET woven layer 306 at the center can prevent the balloon body 301 from over-inflating, reducing the risk of blood vessel damage, dissection or rupture, and significantly improving the safety of the operation. During the process of rotating the threaded air pushing rod 304 into the air cylinder 303 to inflate the balloon body 301, the threaded air pushing rod 304 can accurately control the distance of the threaded air pushing rod 304 sliding into the inflation tube 302 when the gas in the air cylinder 303 is transported to the inside of the balloon body 301 through the inflation tube 302 and the first inflation hole 308. Not only can it accurately control the amount of gas transported, ensuring the controllability of the inflation process of the balloon body 301, but also by accurately controlling the amount of gas transported, it can achieve the ordered inflation of the balloon body 301 from both sides to the center, avoiding uneven inflation or over-inflation caused by too fast or too much gas transportation. With the rotation of the handle 305 to push the threaded push rod 304 into the inside of the inflation cylinder 303, the handle 305 is synchronized to move close to the inflation cylinder 303, and at the same time in the process of rotating the handle 305, the handle 305 will drive the connecting ring 408 to rotate synchronously on the outer surface of the moving ring 407 through the connecting plate 409 connected symmetrically on the outer surface, and when the handle 305 moves close to the inflation cylinder 303, the handle 305 will push the moving ring 407 to slide synchronously on the upper end face of the fixed plate 410 through the connecting plate 409 and the connecting ring 408, and since the upper end face of the fixed plate 410 is equidistantly provided with a scale bar 411, therefore, with the movement of the moving ring 407, the scale bar 411 corresponding to the moving ring 407 will also change accordingly, and through the scale bar 411, the distance moved by the moving ring 407 can be known, which provides an intuitive reference for medical personnel, not only enabling them to accurately observe the distance of the threaded push rod 304 sliding into the inside of the inflation cylinder 303, so as to realize the precise control of the inflation degree of the balloon body 301, but also ensuring that different medical personnel can maintain consistent operation standards during operation, reducing operation errors caused by individual experience differences, and improving the standardization degree of the operation; When the moving ring 407 moves horizontally on the fixed plate 410, since the connecting frame 406 is connected on the side wall of the moving ring 407, the connecting frame 406 is fixedly connected on the fixed ring 401, and the fixed ring 401 is fixedly connected on the inflation pipe 302, therefore, with the movement of the moving ring 407, the moving ring 407 will push the inflation pipe 302 to slide into the extension pipe 2 through the connecting frame 406 and the fixed ring 401, and pull the extension pipe connected on the side of the inflation pipe 302 close to the fixed ring 401 to slide out from the inside of the hollow pipe 405, at this time, the inflation pipe 302 will extrude the hose 402 connected on the side away from the fixed ring 401, and synchronously convey the air in the hose 402 through the inflation head 403 and the second inflation hole 404 to the inside of the balloon body 301 from the side away from the first inflation hole 308, to realize the synchronous inflation and expansion of the balloon body 301 from both sides, which not only can more effectively dilate the blood vessel, especially when dealing with complex lesions such as tortuous, calcified or severely stenotic blood vessels, can better fit the lesion site, improve the dilatation effect, but also through more uniform expansion and better lesion adaptability, the balloon body 301 can more effectively relieve the stenosis of the blood vessel, improve the success rate of the operation, and reduce the possibility of further intervention after the operation.

[0033] The preferred embodiments of the application disclosed above are only to facilitate the elucidation of the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments described. Obviously, many modifications and variations can be made in light of the teachings above. The description is chosen and described in order to best explain the principles of the application and its practical application to thereby enable others skilled in the art to best utilize the application and get the best results from the application. The application is only limited by the claims and their full scope and equivalents.

Claims

1. A balloon-structured guiding and extending catheter, comprising a guiding tube (1), wherein an extending tube (2) is slidably connected through the guiding tube (1), and a through hole (5) is provided on the extending tube (2), characterized in that, It also includes an adaptive expansion mechanism and a synchronous inflation mechanism; The adaptive inflation mechanism includes a balloon body (301), an inflation tube (302), an inflation cylinder (303), a threaded push rod (304), and a handle (305). The balloon body (301) is fixedly connected to the outer surface of the extension tube (2) near the through hole (5). A PET braided layer (306) is provided at the center of the inner wall of the balloon body (301), and silicone rubber braided layers (307) are provided on both sides of the inner wall of the balloon body (301). The adaptive inflation mechanism is used to gradually expand from both sides to the center during the inflation process of the balloon body (301). The synchronous inflation mechanism is used to simultaneously inflate the balloon body (301) from both ends inside.

2. The guiding extension catheter with a balloon structure according to claim 1, characterized in that, The inflation tube (302) is located inside the extension tube (2). A first inflation hole (308) is provided on the outer surface of the inflation tube (302) near the through hole (5). The end of the inflation tube (302) away from the first inflation hole (308) is connected to the inflation cylinder (303).

3. The guiding extension catheter with a balloon structure according to claim 2, characterized in that, The end of the air cylinder (303) away from the air tube (302) is threadedly connected to a threaded push rod (304), and the end of the threaded push rod (304) away from the air cylinder (303) is fixedly connected to a handle (305).

4. The guiding extension catheter with a balloon structure according to claim 1, characterized in that, The synchronous inflation mechanism includes an inflation head (403), which is fixedly connected to the inside of the extension tube (2) near the through hole (5). A second inflation hole (404) is provided on the outer surface of the inflation head (403), and the second inflation hole (404) is located inside the balloon body (301) on the side away from the inflation tube (302).

5. The guiding extension catheter with a balloon structure according to claim 4, characterized in that, The inflation head (403) is fixedly connected to a hose (402) at one end near the inflation tube (302), and the hose (402) is fixedly connected to the inflation tube (302) at the other end away from the inflation head (403). The inflation tube (302) is slidably connected inside the extension tube (2).

6. The guiding extension catheter with a balloon structure according to claim 5, characterized in that, An extension post (412) is fixedly connected to one end of the inflation tube (302) away from the hose (402). A hollow tube (405) is sleeved on the outer surface of the extension post (412) away from the inflation tube (302). The extension post (412) is slidably connected to the hollow tube (405). The hollow tube (405) is fixedly connected to the inflation cylinder (303) at one end away from the extension post (412). The inflation cylinder (303), the hollow tube (405), the extension post (412) and the inflation tube (302) are connected to each other.

7. The guiding extension catheter with a balloon structure according to claim 6, characterized in that, A fixed plate (410) is fixedly connected to the outer surface of the air cylinder (303). A movable ring (407) is horizontally slidably connected to the fixed plate (410). The movable ring (407) is sleeved on the air cylinder (303). A scale strip (411) is fixedly connected at equal intervals on the upper end face of the fixed plate (410). A connecting ring (408) is rotatably connected to the outer surface of the movable ring (407). A connecting plate (409) is symmetrically fixedly connected to the side of the connecting ring (408) near the handle (305). The end of the connecting plate (409) away from the connecting ring (408) is fixedly connected to the handle (305).

8. The guiding extension catheter with a balloon structure according to claim 7, characterized in that, The movable ring (407) is symmetrically fixedly connected to the connecting frame (406) on the side away from the handle (305), and a fixing ring (401) is fixedly connected between the two connecting frames (406) on the side away from the movable ring (407). The fixing ring (401) is fixedly connected to the outer surface of the inflation tube (302).

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