Guiding and lengthening catheter with balloon structure

Abstract

The application discloses a guide extension catheter with a balloon structure and relates to the technical field of medical devices.The guide extension catheter comprises a guide catheter, an extension tube is slidably connected in the guide catheter, a through hole is formed in the extension tube, a self-adapting expansion mechanism and a synchronous inflation mechanism are further included, the self-adapting expansion mechanism comprises a balloon body, an inflation tube, 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, and a silicon rubber braided layer is arranged on both sides of the inner wall of the balloon body, so that the balloon body can be inflated in sequence, first from both sides, then, with continuous injection of gas, the balloon body will gradually and smoothly expand to the center, the expansion force can be more evenly distributed, the pressure on the blood vessel wall at each part is more balanced, the risk of excessive local pressure is reduced, and the possibility of blood vessel wall damage is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a guiding extension catheter with a balloon structure. Background Technology

[0002] In the medical field, endovascular interventional therapy has become an important means of treating cardiovascular and cerebrovascular diseases. As a key device in interventional therapy, the performance of the guiding extension catheter directly affects the success rate and safety of the operation. Traditional guiding extension catheters play an important role in endovascular interventional therapy, but with the continuous development of interventional therapy technology, higher requirements are placed on the performance of guiding extension catheters.

[0003] The existing patent CN110917465A discloses a guiding extension catheter, which consists of an extension tube body, a tapered collar, a push rod, and a handle connected in sequence. The tapered collar is a hollow frustum with an inner cavity whose inner diameter gradually changes in the axial direction. The proximal end of the extension tube body is fixedly connected to the distal end of the tapered collar, and the inner cavity of the extension tube body is connected to the inner cavity of the tapered collar. The inner diameter (inner cavity diameter) of the distal end of the tapered collar is the same as the inner diameter of the extension tube body, and the inner diameter of the distal end of the tapered collar is larger than the inner diameter of its proximal end. This guiding extension catheter uses a tapered collar at the proximal end of the extension tube body, which makes it fit seamlessly with the inner cavity of the matching guiding catheter, effectively avoiding the phenomenon of guidewire, balloon, and stent scuffing and jamming, and effectively improving surgical efficiency and success rate.

[0004] Although the aforementioned method uses a tapered collar at the proximal end of the extension tube to achieve a seamless fit with the lumen of the matching guiding catheter, the balloon inflates from the center first during inflation to dilate the blocked vessel. This uneven inflation not only causes uneven stress on the vessel wall—with greater pressure in the center and less on the sides—but also leads to localized damage to the vessel wall during surgery, potentially causing aortic dissection or rupture and increasing surgical risks. Furthermore, when dealing with complex lesions such as tortuous vessels, calcification, or severe stenosis, balloon inflation from the center cannot effectively conform to the lesion site, resulting in poor dilation and potentially leading to surgical failure or the need for additional instruments, thus increasing the complexity and risk of the procedure.

[0005] Therefore, this invention proposes a guiding extension catheter with a balloon structure to solve the above problems. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a guiding extension catheter with a balloon structure, which can effectively solve the problems in existing technologies.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention can be accomplished through the following technical solutions:

[0010] A balloon-structured extension catheter includes a guide tube with an extension tube slidably connected through it. The extension tube has a through hole. The catheter also includes an adaptive expansion mechanism and a synchronous inflation mechanism. The adaptive expansion mechanism includes a balloon body, an inflation tube, an inflation cylinder, a threaded push 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 provided at the center of the inner wall of the balloon body, and silicone rubber braided layers are provided on both sides of the inner wall. The adaptive expansion mechanism is used to gradually expand from both sides towards the center during balloon body expansion. The synchronous inflation mechanism is used to synchronously inflate from both ends of the balloon body.

[0011] As a further aspect of the present invention: the inflation tube is disposed inside the extension tube, and a first inflation hole is provided on the outer surface of the inflation tube near the through hole, and the end of the inflation tube away from the first inflation hole is connected to the inflation cylinder.

[0012] As a further aspect of the present invention: a threaded push rod is threadedly connected to the end of the air cylinder away from the air tube, and a handle is fixedly connected to the end of the threaded push rod away from the air cylinder.

[0013] As a further aspect of the present invention: the synchronous inflation mechanism includes an inflation head, which is fixedly connected to the inside of the extension tube near the through hole. A second inflation hole is provided on the outer surface of the inflation head, and the second inflation hole is located inside the balloon body on the side away from the inflation tube.

[0014] As a further aspect of the present invention: a flexible tube is fixedly connected to one end of the inflation head near the inflation tube, and the other end of the flexible tube away from the inflation head is fixedly connected to the inflation tube, and the inflation tube is slidably connected inside the extension tube.

[0015] As a further embodiment of the present invention: an extension column is fixedly connected to the end of the inflation tube away from the hose, a hollow tube is sleeved on the outer surface of the extension column away from the inflation tube, the extension column is slidably connected to the hollow tube, and the end of the hollow tube away from the extension column is fixedly connected to the inflation cylinder, and the inflation cylinder, the hollow tube, the extension column and the inflation tube are interconnected.

[0016] As a further embodiment of the present invention: a fixed plate is fixedly connected to the outer surface of the air cylinder, a movable ring is horizontally slidably connected to the fixed plate, the movable ring is sleeved on the air cylinder, scale strips are fixedly connected at equal intervals on the upper surface of the fixed plate, a connecting ring is rotatably connected to the outer surface of the movable ring, a connecting plate is symmetrically fixedly connected to the side of the connecting ring near the handle, and the end of the connecting plate away from the connecting ring is fixedly connected to the handle.

[0017] As a further aspect of the present invention: a connecting frame is symmetrically and fixedly connected to the side of the movable ring away from the handle, and a fixing ring is fixedly connected between the two connecting frames on the side away from the movable ring, and the fixing ring is fixedly connected to the outer surface of the inflation tube.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a guiding extension catheter with a balloon structure, which has the following advantages:

[0020] 1. Through the adaptive expansion mechanism, the balloon body expands from both sides first during the expansion process. Then, with the continuous injection of gas, the balloon body will gradually and smoothly expand towards the center. This not only distributes the expansion force more evenly, making the pressure on the blood vessel wall more balanced in various parts, 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, reducing the risk of blood vessel dissection or rupture, thereby reducing complications during the operation and improving the safety of the operation. In addition, when dealing with complex lesions such as tortuous blood vessels, calcification, or severe stenosis, expanding the 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 surgical failure.

[0021] Specifically, by setting silicone rubber braided layers on both sides of the balloon body and PET braided layers in the center, the softness of the silicone rubber braided layers ensures that the balloon body fits tightly against the blood vessel wall on both sides, achieving a more uniform expansion effect and effectively reducing the problem of uneven stress on the blood vessel wall. The high strength and tensile strength of the PET braided layer in the center can prevent the balloon body from over-expanding, reducing the risk of blood vessel damage, dissection or rupture, and significantly improving the safety of the operation.

[0022] 2. With the threaded push rod, the gas inside the inflation cylinder can be delivered to the balloon body through the inflation tube and the first inflation hole. The distance the threaded push rod slides into the inflation tube can be precisely controlled. This not only enables precise control of the gas delivery volume, thus ensuring the controllability of the balloon body's expansion process, but also allows for orderly expansion of the balloon body from both sides to the center by precisely controlling the gas delivery volume, avoiding uneven expansion or over-expansion caused by excessive or too fast gas delivery.

[0023] 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.

[0024] 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

[0025] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the balloon body structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the extension tube of the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged structural diagram of region A in the middle;

[0030] Figure 5 For the present invention Figure 3 Enlarged structural diagram of region B in the middle;

[0031] Figure 6 For the present invention Figure 1 Enlarged structural diagram of the central air cylinder;

[0032] Figure 7 For the present invention Figure 6 A magnified structural diagram of region C in the middle.

[0033] In the diagram: 1. Guide tube; 2. Extension tube;

[0034] 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;

[0035] 401. Fixing ring; 402. Hose; 403. Inflation head; 404. Second inflation port; 405. Hollow tube; 406. Connecting frame; 407. Moving ring; 408. Connecting ring; 409. Connecting plate; 410. Fixing plate; 411. Scale strip; 412. Extension column;

[0036] 5. Through hole. Detailed Implementation

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] This embodiment provides a guiding extension catheter with a balloon structure, such as... Figure 1 - Figure 7 As shown, the device includes a guide tube 1, an extension tube 2 that is slidably connected through the guide tube 1, and a through hole 5 on the extension tube 2. It also includes an adaptive expansion mechanism and a synchronous inflation mechanism. The adaptive expansion 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 expansion mechanism is used to gradually expand from both sides to the center during the inflation process of the balloon body 301.

[0039] In this embodiment, as Figure 3 , Figure 4 and Figure 6 As shown, the inflation tube 302 is disposed 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. When air is delivered into the inflation tube 302 through the inflation cylinder 303, the air will be delivered into the balloon body 301 along the first inflation hole 308 opened on the inflation tube 302.

[0040] In this embodiment, as Figure 6As shown, the end of the air cylinder 303 away from the air tube 302 is threadedly connected to a threaded push rod 304. The end of the threaded push rod 304 away from the air cylinder 303 is fixedly connected to a handle 305. When the handle 305 is turned to drive the threaded push rod 304 to rotate, the threaded push rod 304 can be rotated and slide into the air cylinder 303 or slide out of the air cylinder 303 through the threaded connection between the threaded push rod 304 and the air cylinder 303.

[0041] In existing technologies, balloon inflation typically begins from the center to expand the blocked blood vessel. This central inflation leads to uneven stress on the vessel wall, with greater pressure at the center and less at the sides. This uneven stress can cause localized damage to the vessel wall during surgery, potentially leading to aortic dissection or rupture, increasing surgical risks. Furthermore, when dealing with complex lesions such as tortuous vessels, calcification, or severe stenosis, central inflation fails to effectively conform to the lesion site, resulting in poor dilation and potentially surgical failure or requiring additional instruments, further increasing the complexity and risk of the procedure. Compared to existing technologies, balloon inflation can... During the expansion of the balloon body 301, the expansion sequence begins from both sides. Subsequently, with the continuous injection of gas, the balloon body 301 gradually and steadily expands towards the center. This not only distributes the expansion force more evenly, making the pressure on the blood vessel wall more balanced in various parts, 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, reducing the risk of vascular dissection or rupture, thereby reducing complications during the operation and improving the safety of the operation. Furthermore, when dealing with complex lesions such as tortuous blood vessels, calcification, or severe stenosis, expanding both sides first can better fit the lesion site, ensuring sufficient contact between the balloon and the lesion site, improving the dilation effect, and reducing the risk of surgical failure.

[0042] Specifically, by setting silicone rubber braided layers 307 on both sides of the inner side of the balloon body 301 and PET braided layers 306 in the center, the softness of the silicone rubber braided layers 307 can ensure that the two sides of the balloon body 301 fit tightly against the blood vessel wall, achieving a more uniform expansion effect and effectively reducing the problem of uneven stress on the blood vessel wall. The high strength and tensile strength of the PET braided layers 306 in the center can prevent the balloon body 301 from over-expanding, reducing the risk of blood vessel damage, dissection or rupture, and significantly improving the safety of the operation.

[0043] At other levels, this embodiment also provides a synchronous inflation mechanism for simultaneously inflating the balloon body 301 from both ends inside, such as... Figure 1 , Figure 3 - Figure 7As shown, 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.

[0044] In this embodiment, as Figure 4 and Figure 5 As shown, a hose 402 is fixedly connected to one end of the inflation head 403 near the inflation tube 302, and the other end of the hose 402 away from the inflation head 403 is fixedly connected to the inflation tube 302. The inflation tube 302 is slidably connected inside the extension tube 2. When the inflation tube 302 slides close to the inflation head 403, it will squeeze the hose 402, delivering the air inside the hose 402 into the inflation head 403. When the inflation tube 302 moves away from the inflation head 403, it will pull the hose 402 back to its original position, drawing air back into the hose 402.

[0045] In this embodiment, as Figure 6 and Figure 7 As shown, an extension post 412 is fixedly connected to the 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 end of the hollow tube 405 away from the extension post 412 is fixedly connected to the inflation cylinder 303. The inflation cylinder 303, the hollow tube 405, the extension post 412 and the inflation tube 302 are connected. When the inflation tube 302 slides into the extension tube 2, the inflation tube 302 will simultaneously drive the extension post 412 to slide out from the hollow tube 405. Through the extension post 412 and the hollow tube 405, the connection between the inflation tube 302 and the inflation cylinder 303 can be maintained.

[0046] In this embodiment, as Figure 6 As shown, 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. Scale bars 411 are fixedly connected at equal intervals on the upper surface 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 ends of the connecting plates 409 away from the connecting ring 408 are fixedly connected to the handle 305. When the handle 305 is rotated, the connecting plate 409 can drive the connecting ring 408 to rotate on the outer surface of the movable ring 407. At the same time, when the handle 305 moves, the handle 305 will push the movable ring 407 to slide on the fixed plate 410 through the connecting plate 409 and the connecting ring 408. By observing the scale bars 411 corresponding to the movable ring 407, the distance moved by the movable ring 407 can be controlled and understood.

[0047] In this embodiment, as Figure 6 and Figure 7 As shown, a connecting frame 406 is symmetrically fixedly connected to the side of the moving ring 407 away from the handle 305. A fixed ring 401 is fixedly connected between the two connecting frames 406 away from the moving ring 407. 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 through the connecting frame 406, so that the fixed ring 401 pushes the inflation tube 302 to slide into the extension tube 2 or slide out of the extension tube 2.

[0048] Compared with existing technologies, this method allows for the simultaneous inflation of the balloon body 301 by the threaded push rod 304 sliding into the inflation cylinder 303, while simultaneously compressing the tubing 402. This compresses the air inside the tubing 402, allowing it to be simultaneously inflated from the other side of the balloon body 301 through the inflation head 403 and the second inflation port 404. This simultaneous inflation of the balloon body 301 from both sides 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 301 can more effectively relieve vascular stenosis, increase the success rate of surgery, and reduce the possibility of further postoperative intervention.

[0049] The overall working process and principles involved in the above embodiments are as follows:

[0050] When medical personnel need to dilate a patient's blocked blood vessel, the guiding tube 1 is first inserted into the blood vessel, and then the extension tube 2 is passed through the guiding tube 1, moving the balloon body 301 on the outer surface of the extension tube 2 to the blocked blood vessel. After the balloon body 301 is moved to the blocked area, the staff can turn the handle 305 to rotate the threaded push rod 304. The threaded push rod 304 is threadedly connected to the inflation cylinder 303, allowing the threaded push rod 304 to rotate and slide into the inflation cylinder 303. At this time, the threaded push rod 304 will deliver the air inside the inflation tube 302 through the inflation tube 302, the first inflation port 308, and the through hole 5 on the outer surface of the extension tube 2 to the inside of the balloon body 301. The balloon body 301 is then supported by the PET braided layer 306 and silicone rubber braid inside. Due to the influence of layer 307, during the process of gas entering the balloon body 301, its expansion sequence begins from both sides. Subsequently, as gas is continuously injected, the balloon body 301 will gradually and steadily expand towards the center. This not only allows for a more even distribution of expansion force, making the pressure on the blood vessel wall more balanced in various parts, 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, reducing the risk of vascular dissection or rupture, thereby reducing complications during the operation and improving the safety of the operation. Furthermore, when dealing with complex lesions such as tortuous blood vessels, calcification, or severe stenosis, expanding both sides first can better fit the lesion site, ensuring sufficient contact between the balloon and the lesion site, improving the dilation effect, and reducing the risk of surgical failure.

[0051] During the expansion of the balloon body 301, the softness of the silicone rubber braided layer 307 ensures that the balloon body 301 fits tightly against the blood vessel wall on both sides, achieving a more uniform expansion effect and effectively reducing the problem of uneven stress on the blood vessel wall. The high strength and tensile strength of the PET braided layer 306 at the center can prevent the balloon body 301 from over-expanding, reducing the risk of blood vessel damage, dissection or rupture, and significantly improving the safety of the operation.

[0052] During the process of the threaded push rod 304 rotating and sliding into the inflation cylinder 303 to inflate the balloon body 301, the threaded push rod 304 can precisely control the distance of the threaded push rod 304 sliding into the inflation cylinder 302. This not only enables precise control of the gas delivery volume, thus ensuring the controllability of the balloon body 301 inflation process, but also allows for orderly inflation of the balloon body 301 from both sides to the center by precisely controlling the gas delivery volume, avoiding uneven or excessive inflation caused by excessive or too fast gas delivery.

[0053] As the handle 305 rotates, it pushes the threaded air pusher 304 into the air cylinder 303. Simultaneously, the handle 305 moves closer to the air cylinder 303. During the rotation of the handle 305, it drives the connecting ring 408 to rotate synchronously on the outer surface of the moving ring 407 via the connecting plate 409 symmetrically connected to its outer surface. As the handle 305 moves closer to the air cylinder 303, it pushes the moving ring 407 to slide synchronously on the upper surface of the fixed plate 410 via the connecting plate 409 and the connecting ring 408. Since the upper surface of the fixed plate 410 has equidistant scale bars 411, because... As the moving ring 407 moves, the scale bar 411 corresponding to the moving ring 407 will also change accordingly. By passing through the scale bar 411, the distance that the moving ring 407 has moved can be known, providing medical personnel with an intuitive reference. This not only allows them to accurately observe the distance that the threaded push rod 304 slides into the inflation cylinder 303, thereby achieving precise control over the inflation degree of the balloon body 301, but also ensures that different medical personnel can maintain consistent operating standards during the operation, reducing operational errors caused by differences in personal experience and improving the standardization of the surgery.

[0054] As the moving ring 407 moves horizontally on the fixed plate 410, a connecting frame 406 is connected to the side wall of the moving ring 407. The connecting frame 406 is fixedly connected to the fixed ring 401, and the fixed ring 401 is fixedly connected to the inflation tube 302. Therefore, as the moving ring 407 moves, it pushes the inflation tube 302 into the extension tube 2 through the connecting frame 406 and the fixed ring 401, pulling the extension tube connected to the side of the inflation tube 302 near the fixed ring 401 out of the hollow tube 405. At this time, the inflation tube 302 will then push the hose 402 connected to the end away from the fixed ring 401. By squeezing, air inside the tubing 402 is simultaneously delivered to the balloon body 301 from the side away from the first inflation port 308 through the inflation head 403 and the second inflation port 404. This allows for simultaneous inflation of the balloon body 301 from both sides, which not only dilates blood vessels more effectively, 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 expansion and better lesion adaptability, the balloon body 301 can more effectively relieve vascular stenosis, improve the success rate of surgery, and reduce the possibility of further postoperative intervention.

[0055] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only 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 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). The second inflation hole (404) is located inside the balloon body (301) on the side away from the inflation tube (302). A hose (402) is fixedly connected to one end of the inflation head (403) near the inflation tube (302), and the other end of the hose (402) away from the inflation head (403) is fixedly connected to... On the inflation tube (302), the inflation tube (302) is slidably connected to the inside of the extension tube (2). An extension post (412) is fixedly connected to the 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 end of the hollow tube (405) away from the extension post (412) is fixedly connected to the inflation cylinder (303). The air cylinder (303), hollow tube (405), extension column (412), and inflation tube (302) are connected. A fixing plate (410) is fixedly connected to the outer surface of the air cylinder (303). A moving ring (407) is horizontally slidably connected to the fixing plate (410). The moving ring (407) is sleeved on the air cylinder (303). A connecting ring (408) is rotatably connected to the outer surface of the moving ring (407). A connecting plate (409) is symmetrically fixedly connected to the connecting ring (408) near the handle (305). The connecting plate (409) is fixedly connected to the handle (305) at the end away from the connecting ring (408). The moving ring (407) is symmetrically fixedly connected to the connecting frame (406) on the side away from the handle (305). A fixing ring (401) is fixedly connected between the two connecting frames (406) on the side away from the moving ring (407). The fixing ring (401) is fixedly connected to the outer surface of the inflation tube (302). The synchronous inflation mechanism is used to synchronously inflate from both ends inside the balloon body (301).

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 upper surface of the fixing plate (410) is fixedly connected with scale strips (411) at equal intervals.

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