Peripheral balloon catheter

Abstract

The utility model provides a peripheral balloon catheter. The peripheral balloon catheter comprises a Y-shaped operating handle and a catheter body connected to the operating handle. The catheter body comprises an inner tube, an interlayer tube arranged on the inner tube in a sleeving mode and an outer tube arranged on the interlayer tube in a sleeving mode. A first channel is formed between the interlayer pipe and the inner pipe, and a second channel is formed between the interlayer pipe and the outer pipe. A first bag and a second bag are arranged at the end, away from the operation handle, of the outer pipe at intervals. The first channel is communicated with the first bag, and the second channel is communicated with the second bag; the operating handle is provided with a guide wire channel communicated with the inner pipe and further provided with a rotating connector used for being connected with an air supply and exhaust device, and the rotating connector has a first air supply and exhaust state communicated with the first channel and a second air supply and exhaust state communicated with the second channel. By means of the peripheral balloon catheter, interventional operation efficiency can be improved, operation time can be shortened, and risk factors can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a peripheral balloon catheter. BACKGROUND

[0002] Lower extremity arteriosclerosis obliterans is a kind of disease that arteriosclerosis occurs in lower extremity arteries, causes lower extremity arteriosclerosis stenosis and occlusion, and further causes lower extremity ischemia, nutrition disorder, limb ulcer and necrosis. At present, the common treatment means for lower extremity arteriosclerosis obliterans is peripheral balloon catheter (including ordinary balloon, drug-coated balloon and peripheral constrained balloon) and peripheral vascular stent intervention surgery assisted by peripheral balloon catheter.

[0003] The existing peripheral balloon catheter is usually configured with a single balloon at the distal end, which is moved to the target position along the guide wire. However, in actual clinical practice, simply performing single balloon intervention cannot completely solve the problem, and it is often necessary to implant drug-coated or vascular stents with the same or different efficacy multiple times around the target position, thereby causing repeated operation in the intervention surgery process, low efficiency, and further causing the surgery process to be prolonged and the risk factors to be increased, which needs to be gradually improved. SUMMARY

[0004] The utility model embodiment provides a kind of peripheral balloon catheter, to improve the work efficiency of peripheral balloon catheter intervention surgery and reduce risk factors.

[0005] To achieve the above object, the utility model adopts the technical scheme of providing a kind of peripheral balloon catheter, including Y type handle and the catheter body connected to handle;Catheter body includes inner tube, cladding layer pipe of inner tube, and outer tube of cladding layer pipe;Wherein, first passage is formed between cladding layer pipe and inner tube, and second passage is formed between cladding layer pipe and outer tube;First balloon and second balloon are configured with interval at the end of outer tube away from handle;First passage is communicated with first balloon, and second passage is communicated with second balloon;Handle has guide wire channel communicated with inner tube, and handle also has rotary joint for connecting air supply and exhaust device, and rotary joint has first air supply and exhaust state communicated with first passage and second air supply and exhaust state communicated with second passage.

[0006] In a possible implementation manner, the rotary joint includes a shell and a rotating core connected to the shell;The shell is provided with a socket for connecting the air supply and exhaust device, and the rotating core is provided with a first annular channel and a second annular channel, the first annular channel is aligned and communicated with the first passage, and the second annular channel is aligned and communicated with the second passage;Wherein, when the rotating core is rotated to the first annular channel communicated with the socket, the first air supply and exhaust state is formed, and when the rotating core is rotated to the second annular channel communicated with the socket, the second air supply and exhaust state is formed.

[0007] In some embodiments, the outer peripheral wall of the rotating core is provided with a first hole communicated with the first annular channel and a second hole communicated with the second annular channel along the radial direction of the rotating core, and the first hole and the second hole are respectively adapted to be aligned and communicated with the spigot.

[0008] For example, the rotating core is provided with a central hole adapted to guide the wire therethrough.

[0009] For example, the peripheral wall of the rotating core is sealingly connected and rotatably fitted with the inner peripheral wall of the shell, and the rotating core is provided with an operating disc extending out of the shell.

[0010] In a possible implementation, the inner peripheral wall of the sandwich tube is provided with a plurality of inner grooves spaced along the circumferential direction of the sandwich tube, and each of the inner grooves forms a first channel with the outer peripheral wall of the inner tube; the outer peripheral wall of the sandwich tube is provided with a plurality of outer grooves spaced along the circumferential direction of the sandwich tube, and each of the outer grooves forms a second channel with the inner peripheral wall of the outer tube.

[0011] In some embodiments, each of the inner grooves and each of the outer grooves are sequentially and staggeredly distributed along the circumferential direction of the sandwich tube.

[0012] For example, the outer peripheral wall of the sandwich tube is provided with a first annular groove adapted to be shrink-fitted with the first capsule and a second annular groove adapted to be shrink-fitted with the second capsule.

[0013] For example, the first annular groove and the second annular groove form an expanded diameter section.

[0014] In some embodiments, the end of the catheter body away from the operating handle forms a tapered guide head.

[0015] The peripheral balloon catheter has the advantages that, compared with the prior art, the peripheral balloon catheter, the operating handle is communicated with the inner tube to form a guide wire channel, the inner tube and the outer tube are connected through the interlayer tube to form a first channel and a second channel, the first balloon bag communicated with the first channel and the second balloon bag communicated with the second channel are arranged at intervals at the position of the outer tube away from the operating handle, the first balloon bag and the second balloon bag can be respectively implanted into a blood vessel lesion position as drug balloon bags with different effects, or the peripheral stents can be respectively sleeved on the first balloon bag and the second balloon bag to be implanted into a blood vessel occlusion or stenosis position; in the operation process, first, the catheter body is pushed to the first balloon bag to align with the target position, then the rotating joint is switched to the first air supply and exhaust state, the air supply and exhaust device is used to supply air to the first channel to inflate the first balloon bag, so that the drug coating of the first balloon bag is coated on the blood vessel wall or the peripheral stent sleeved on the first balloon bag is expanded, then the air supply and exhaust device exhausts the first balloon bag to make the first balloon bag shrink, the catheter body is continuously pushed to make the second balloon bag align with the blood vessel lesion position, then the rotating joint is switched to the second air supply and exhaust state, and the air supply and exhaust device is used to supply air to the second channel to inflate the second balloon bag, so that the drug coating of the second balloon bag is coated on the blood vessel wall or the peripheral stent sleeved on the second balloon bag is expanded, then the air supply and exhaust device exhausts the second balloon bag, and the catheter body can be smoothly withdrawn; through the above process, two drug coatings with different effects can be implanted into the blood vessel lesion position at one time, or two peripheral stents can be continuously lowered into the blood vessel occlusion or stenosis position at one time, so that the intervention operation efficiency can be improved, the operation time is reduced, and the risk factors caused by repeated entry and exit of the catheter body into the blood vessel are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure schematic view of the peripheral balloon catheter provided by the utility model embodiment when the first balloon bag and the second balloon bag are in the inflated and expanded state is shown in the figure;

[0017] Figure 2 A structure schematic view of the catheter body adopted by the utility model embodiment when the first balloon bag and the second balloon bag are in the shrunk state is shown in the figure;

[0018] Figure 3 A structure schematic view of the catheter body adopted by the utility model embodiment when the first balloon bag is in the inflated and expanded state is shown in the figure;

[0019] Figure 4 A structure schematic view of the catheter body adopted by the utility model embodiment when the second balloon bag is in the inflated and expanded state is shown in the figure;

[0020] Figure 5 A Figure 1 A local enlarged structure schematic view of position A in the figure;

[0021] Figure 6 A Figure 1A local enlarged structure schematic view at B;

[0022] Figure 7 A cross-sectional structure schematic view of the rotary joint used in the embodiment of the present application;

[0023] Figure 8 For along Figure 7 A cross-sectional structure schematic view along C-C line;

[0024] Figure 9 A cross-sectional structure schematic view of the catheter body used in the embodiment of the present application.

[0025] In the figure: 10, operating handle; 100, rotary joint; 101, shell; 1011, socket; 102, rotating core; 1021, first annular channel; 1022, second annular channel; 1023, first hole; 1024, second hole; 1025, center hole; 1026, operating disc; 1027, sealing ring; 20, catheter body; 200, conical guide head; 201, first channel; 202, second channel; 21, inner tube; 22, interlayer tube; 221, inner groove; 222, outer groove; 223, first annular groove; 224, second annular groove; 225, diameter expansion section; 23, outer tube; 231, first capsule; 232, second capsule; 30, air supply and exhaust device. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and obvious, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0027] It should be noted that when an element is referred to as "set on", "connected to" another element, it can be directly on the other element or indirectly on the other element. The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0028] Please see Figures 1 to 9The utility model provides a peripheral balloon catheter, which comprises a Y-shaped operating handle 10 and a catheter body 20 connected to the operating handle 10; the catheter body 20 comprises an inner tube 21, a cladding layer tube 22 sleeved on the inner tube 21, and an outer tube 23 sleeved on the cladding layer tube 22; a first channel 201 is formed between the cladding layer tube 22 and the inner tube 21, and a second channel 202 is formed between the cladding layer tube 22 and the outer tube 23; a first balloon 231 and a second balloon 232 are arranged at an end of the outer tube 23 away from the operating handle 10; the first channel 201 is in communication with the first balloon 231, and the second channel 202 is in communication with the second balloon 232; the operating handle 10 is provided with a guide wire channel in communication with the inner tube 21, and is further provided with a rotary joint 100 for connecting an air supply and exhaust device 30; the rotary joint 100 has a first air supply and exhaust state in communication with the first channel 201 and a second air supply and exhaust state in communication with the second channel 202.

[0029] It should be noted that the operating handle 10 with the Y-shaped structure has the same structure and principle as the operating part of the existing peripheral balloon catheter; the guide wire channel is in communication with the inner tube 21 and is suitable for the guide wire to pass through; the branch pipe realizes air supply and exhaust by connecting the air supply and exhaust device 30, such as a syringe or an injection pump; and the air supply and exhaust structure will not be described further.

[0030] The first balloon 231 and the second balloon 232 in the embodiment can be integrally formed on the outer tube 23; both are made of a radially elastic deformed plastic film material, which is radially expanded (thickened) when inflated and returns to the original state after air exhaust; the structure and expansion principle are the same as those of the peripheral balloon catheter in the prior art, and will not be described further.

[0031] Compared with the prior art, the peripheral balloon catheter provided by the embodiment is characterized in that the operating handle 10 is in communication with the inner tube 21 to form a guide wire channel, the inner tube 21 and the outer tube 23 are connected through the interlayer tube 22 to form a first channel 201 and a second channel 202, the outer tube 23 is spaced apart from the part of the operating handle 10 and is provided with a first balloon bag 231 in communication with the first channel 201 and a second balloon bag 232 in communication with the second channel 202, the first balloon bag 231 and the second balloon bag 232 can be respectively implanted into a vascular lesion position as drug balloon bags with different effects, or the peripheral stents can be respectively sleeved on the first balloon bag 231 and the second balloon bag 232 to be implanted into a vascular occlusion or stenosis position; in the operation process, first, the catheter body 20 is pushed to align the first balloon bag 231 with the target position, then the rotary joint 100 is switched to the first gas supply and exhaust state, and the gas supply and exhaust device 30 is used to supply gas to the first channel 201 to inflate the first balloon bag 231, so that the drug coating of the first balloon bag 231 is coated on the vascular wall or the peripheral stent sleeved on the first balloon bag 231 is expanded, then the gas supply and exhaust device 30 is used to exhaust the first balloon bag 231 to make the first balloon bag 231 shrink, the catheter body 20 is continuously pushed to align the second balloon bag 232 with the vascular lesion position, then the rotary joint 100 is switched to the second gas supply and exhaust state, and the gas supply and exhaust device 30 is used to supply gas to the second channel 202 to inflate the second balloon bag 232, so that the drug coating of the second balloon bag 232 is coated on the vascular wall or the peripheral stent sleeved on the second balloon bag 232 is expanded, then the gas supply and exhaust device 30 is used to exhaust the second balloon bag 232, and the catheter body 20 can be smoothly withdrawn; through the above process, two drug coatings with different effects can be implanted into the vascular lesion position at one time, or two peripheral stents can be continuously inserted into the vascular occlusion or stenosis position at one time, so that the intervention operation efficiency can be improved, the operation time can be reduced, and the risk factors caused by repeated entry and exit of the catheter body 20 into the blood vessel can be reduced.

[0032] In some embodiments, referring to Figures 5 to 8 , the rotary joint 100 comprises an outer shell 101 and a rotating core 102 rotatably connected in the outer shell 101; the outer shell 101 is provided with a socket 1011 for connecting the gas supply and exhaust device 30, and the rotating core 102 is provided with a first ring channel 1021 and a second ring channel 1022, the first ring channel 1021 is in alignment and communication with the first channel 201, and the second ring channel 1022 is in alignment and communication with the second channel 202; wherein, when the rotating core 102 is rotated to the first ring channel 1021 to be in communication with the socket 1011, the first gas supply and exhaust state is formed, and when the rotating core 102 is rotated to the second ring channel 1022 to be in communication with the socket 1011, the second gas supply and exhaust state is formed.

[0033] The rotation joint 100 is arranged to switch the communication state of the exhaust device 30 with the first channel 201 and the second channel 202, so that the first bladder 231 and the second bladder 232 are respectively supplied with air; specifically, the first ring channel 1021 is communicated with the first channel 201, and the second ring channel 1022 is communicated with the second channel 202, so that the air can be uniformly supplied into the first channel 201 or the second channel 202 when the first bladder 231 or the second bladder 232 is supplied with air, and then the first bladder 231 and the second bladder 232 are filled with the air entering in the circumferential direction, so that the first bladder 231 and the second bladder 232 are uniformly expanded in the circumferential direction, which helps to improve the uniformity of the contact pressure of the drug coating and the blood vessel wall at the lesion position, and then improve the uniformity of the drug coating on the blood vessel wall and the support stability of the peripheral stent.

[0034] Specifically, as shown in Figure 7 , the peripheral wall of the rotating core 102 is provided with a first hole 1023 communicated with the first ring channel 1021 and a second hole 1024 communicated with the second ring channel 1022 in the radial direction, and the first hole 1023 and the second hole 1024 are respectively adapted to be aligned and communicated with the spigot 1011.

[0035] By rotating the rotating core 102, the first hole 1023 or the second hole 1024 can be aligned with the spigot 1011, so as to realize the communication of the exhaust device 30 with the first ring channel 1021 or the second ring channel 1022, and then switch between the first air supply state and the second air supply state, which is simple and compact in structure.

[0036] It should be noted that, referring to Figure 8 , the center of the rotating core 102 is provided with a center hole 1025 adapted for the guide wire to pass through. Since the guide wire needs to pass through the catheter body 20 from the handle 10, the center hole 1025 is arranged on the rotating core 102 for the guide wire to pass through, so that the rotation joint 100 can be connected to the combined position of the catheter body 20 and the handle 10, and the compactness of the overall structure is improved.

[0037] It should be understood that, in the embodiment, the peripheral wall of the rotating core 102 is sealingly connected and rotationally matched with the inner peripheral wall of the shell 101, and the rotating core 102 has an operation disc 1026 extending out of the shell 101. Please refer to Figure 7 and Figure 8 , the peripheral wall of the rotating core 102 can be provided with a sealing ring 1027 on both sides of the spigot 1011 to prevent air leakage, so as to improve the control accuracy of the filling pressure of the first bladder 231 and the second bladder 232; at the same time, the operation disc 1026 formed by the part of the rotating core 102 extending out of the shell 101 can facilitate the rotation operation of the rotating core 102, so as to improve the convenience of switching between the first air supply state and the second air supply state.

[0038] As a specific embodiment of the sandwich tube 22, please refer to Figure 9 , the inner circumferential wall of the sandwich tube 22 is spaced along the circumferential direction and is provided with a plurality of inner grooves 221, each of which forms a first passage 201 with the outer circumferential wall of the inner tube 21; the outer circumferential wall of the sandwich tube 22 is spaced along the circumferential direction and is provided with a plurality of outer grooves 222, each of which forms a second passage 202 with the inner circumferential wall of the outer tube 23.

[0039] By the circumferentially spaced inner grooves 221 and outer grooves 222 as the first passage 201 and the second passage 202 respectively, the stability of the communication between the gas supply and exhaust device 30 and the first balloon 231 or the second balloon 232 can be ensured, and the compression and obstruction of the first passage 201 or the second passage 202 when the catheter body 20 is bent along the guide wire path can be avoided, thereby ensuring the smooth and reliable gas supply and exhaust process.

[0040] In some possible implementations, please refer to Figure 9 , each inner groove 221 and each outer groove 222 is sequentially and staggered distributed along the circumferential direction of the sandwich tube 22. The staggered distribution of the inner grooves 221 and the outer grooves 222 can form cross supports between the inner tube 21 and the outer tube 23 by using the parts between adjacent inner grooves 221 and the parts between adjacent outer grooves 222, thereby avoiding the collapse deformation and obstruction of the first passage 201 and the second passage 202 when the catheter body 20 is bent, and ensuring a stable gas supply and exhaust process.

[0041] In some embodiments, as shown in Figure 1 and Figure 2 , the outer circumferential wall of the sandwich tube 22 has a first annular groove 223 suitable for the shrinkage and embedding of the first balloon 231, and a second annular groove 224 suitable for the shrinkage and embedding of the second balloon 232. For the implantation operation of the outer peripheral stent, by providing the first annular groove 223 and the second annular groove 224, the outer peripheral stent can be prevented from forming a protrusion on the circumferential wall of the outer tube 23 when the outer peripheral stent is sleeved on the first balloon 231 and the second balloon 232, thereby affecting the passability, and at the same time, the outer peripheral stent can be axially positioned, thereby improving the smoothness of the implantation process of the outer peripheral stent and the accuracy of the implantation position.

[0042] Specifically, please refer to Figures 1 to 4 , in this embodiment, the first annular groove 223 and the second annular groove 224 form an expanded diameter section 225. When the catheter body 20 continues to penetrate into the blood vessel after the drug coating of the first balloon 231 or the implantation of the outer peripheral stent into the lesion site is completed, the expanded diameter section 225 can be used as a guide to advance in the blood vessel, thereby preventing the drug coating on the second balloon 232 or the outer peripheral stent from contacting the blood vessel wall and causing drug loss or mispositioning of the outer peripheral stent.

[0043] It should be understood that, please refer toFigure 1 In the present embodiment, the end portion of the catheter body 20 away from the operating handle 10 is formed with a tapered guide head 200. The tapered guide head 200 can gradually expand the occluded or narrow blood vessel site, thereby guiding the catheter body 20 to pass through, and can improve the smoothness of the catheter body 20 along the guide wire in the blood vessel.

[0044] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A peripheral balloon catheter, characterized by, The utility model provides a kind of catheter, including Y-shaped operating handle and the catheter body connected to the operating handle;The catheter body includes inner tube, interlayer tube of the inner tube and outer tube of the interlayer tube;Wherein, the first passage is formed between the interlayer tube and the inner tube, and the second passage is formed between the interlayer tube and the outer tube;First capsule and second capsule are arranged at the end of the outer tube away from the operating handle;The first passage is communicated with the first capsule, and the second passage is communicated with the second capsule;The operating handle has guide wire passage communicated with the inner tube, and the operating handle also has rotary joint for connecting air supply and exhaust device, and the rotary joint has first air supply and exhaust state communicated with the first passage and second air supply and exhaust state communicated with the second passage.

2. The peripheral balloon catheter of claim 1, wherein, The rotary joint includes shell and rotating core connected in the shell;The shell is provided with socket for connecting the air supply and exhaust device, and the rotating core is provided with first annular channel and second annular channel, and the first annular channel is aligned and communicated with the first passage, and the second annular channel is aligned and communicated with the second passage;Wherein, the first air supply and exhaust state is formed when the rotating core is rotated to the first annular channel communicated with the socket, and the second air supply and exhaust state is formed when the rotating core is rotated to the second annular channel communicated with the socket.

3. The peripheral balloon catheter of claim 2, wherein, The outer peripheral wall of the rotating core is provided with first hole communicated with the first annular channel and second hole communicated with the second annular channel along its radial direction, and the first hole and the second hole are respectively adapted to be aligned and communicated with the socket.

4. The peripheral balloon catheter of claim 2, wherein, The center of the rotating core is provided with central hole adapted to pass through guide wire.

5. The peripheral balloon catheter of claim 2, wherein, The peripheral wall of the rotating core is sealingly connected and rotationally matched with the inner peripheral wall of the shell, and the rotating core has operating disc extending out of the shell.

6. The peripheral balloon catheter of claim 1, wherein, The inner peripheral wall of the interlayer tube is spacedly distributed with a plurality of inner grooves along its circumferential direction, and each inner groove forms the first passage with the outer peripheral wall of the inner tube;The outer peripheral wall of the interlayer tube is spacedly distributed with a plurality of outer grooves along its circumferential direction, and each outer groove forms the second passage with the inner peripheral wall of the outer tube.

7. The peripheral balloon catheter of claim 6, wherein, Each inner groove and each outer groove are sequentially and staggeredly distributed along the circumferential direction of the interlayer tube.

8. The peripheral balloon catheter of claim 1, wherein, The outer peripheral wall of the interlayer tube has first annular groove adapted to shrink and embed the first capsule and second annular groove adapted to shrink and embed the second capsule.

9. The peripheral balloon catheter of claim 8, wherein, The first annular groove and the second annular groove form diameter-expanding section.

10. The peripheral balloon catheter of any one of claims 1-9, wherein, The end of the catheter body away from the operating handle forms tapered head.

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