Balloon catheter with ultraviolet curing device

Abstract

The utility model provides a kind of balloon catheter with ultraviolet curing device, including catheter and guide wire being arranged in the inside of catheter, the proximal end of catheter is fixedly connected with operating part, the outside of catheter is coated with balloon, balloon is located at the distal end of catheter;Catheter is communicated with balloon;Ultraviolet curing device can be plugged and arranged in catheter;Ultraviolet curing device includes light source, connecting line, conducting rod, handle and connecting plug, light source is encapsulated in the distal end of conducting rod, handle is fixed in the proximal end of conducting rod, connecting plug is connected with handle, and connecting plug is used to connect external power supply;Connecting line is arranged in conducting rod, and is connected with light source and connecting plug;Operating part is equipped with liquid injection port and instrument access, and liquid injection port and instrument access are communicated with catheter;Balloon is light-transmitting structure, handle is assembled in instrument access, conducting rod is located in catheter, and light source is located in the inside of balloon.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a balloon catheter with an ultraviolet curing device. Background Technology

[0002] Hydrogels, due to their high water content, biocompatibility, anti-inflammatory properties, and wound-healing effects, have become a research hotspot in the field of medical dressings in recent years and have been successfully applied to the repair of external wounds on the human body. However, in internal surgeries, especially in departments such as the gastrointestinal tract, bladder, and lungs, surgical injuries and even perforations frequently occur, and existing remedial measures are complex, slow to respond, and prone to serious medical accidents. While the application of hydrogels for in vivo wound repair has great potential, it faces the following challenges: 1. Conventional endoscopic spot application methods are prone to causing uneven coating of hydrogel in the body cavity environment; Second, existing curing methods are insufficient to achieve rapid and complete curing of hydrogels in minimally invasive settings, and the cured hydrogel does not adhere firmly to the tissue, affecting the repair effect. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a balloon catheter with a UV curing device, comprising a catheter and a guidewire inserted inside the catheter. An operating part is fixedly connected to the proximal end of the catheter, and a balloon is wrapped around the outside of the catheter, located at the distal end of the catheter. The catheter communicates with the balloon. The UV curing device is insertably and removably inserted into the catheter. The UV curing device includes a light source, a connecting wire, a transmission rod, a handle, and a connecting plug. The light source is encapsulated at the distal end of the transmission rod, the handle is fixed to the proximal end of the transmission rod, and the connecting plug is connected to the handle for connecting to an external power source. The connecting wire is disposed within the transmission rod and connects the light source and the connecting plug. The operating part has an injection port and an instrument inlet, both of which communicate with the catheter. The balloon is a light-transmitting structure. After the handle is assembled into the instrument inlet, the transmission rod is located inside the catheter, and the light source is located inside the balloon.

[0004] Optionally, the light source is encapsulated at the distal end of the conductive rod using a light-transmitting adhesive.

[0005] Optionally, the light source is a UV-LED light source.

[0006] Optionally, the conductive rod is made of insulating material.

[0007] Optionally, the handle is detachably and fixedly connected to the instrument inlet, and after the handle is assembled into the instrument inlet, the handle seals the instrument inlet.

[0008] Optionally, the operating unit is further provided with a catheter interface, which is connected to the proximal end of the catheter. The injection port and the instrument inlet are both connected to the catheter through the catheter interface. The injection port, the instrument inlet, and the catheter interface form a Y-shaped structure, and the catheter interface and the instrument inlet are coaxial with the catheter.

[0009] Optionally, the instrument inlet is a first Luer interface, and the handle is provided with a second Luer interface adapted to the first Luer interface, wherein one of the first Luer interface and the second Luer interface is a male interface and the other is a female interface.

[0010] Optionally, the injection port is further provided with a two-way stopcock, the stopcock having a stopcock through hole. When the stopcock through hole is coaxial with the injection port, the two-way stopcock is open; when the stopcock through hole is perpendicular to the injection port, the two-way stopcock is closed.

[0011] Optionally, the operating part is a three-way Luer connector.

[0012] Optionally, the guidewire is insertable and removable within the catheter, and the proximal end of the guidewire is provided with an insertion and removal structure, which is detachably and fixedly connected to the instrument inlet.

[0013] Optionally, the catheter is separated into a first tube and a second tube inside the balloon. The proximal end of the first tube is fixedly connected to the operating part. The two ends of the balloon are fixedly connected to the outer walls of the first tube and the second tube, respectively. The cross-section between the distal end of the first tube and the proximal end of the second tube forms a communication channel between the catheter and the balloon.

[0014] Optionally, the guidewire includes a first guidewire and a second guidewire that are separated from each other inside the balloon, the distal end of the first guidewire can pass through the operating part and enter the catheter, and the second guidewire is fixed to the distal end of the catheter.

[0015] Optionally, the proximal end of the second guidewire is inserted into the first tube to a depth greater than the separation distance between the first and second tubes during balloon inflation.

[0016] Optionally, the wall of the first tube inside the balloon is further provided with several through holes. Compared with the prior art, the technical solution of this utility model embodiment has the following beneficial effects: This invention uses an expanded balloon to compress and coat the hydrogel onto the damaged area, ensuring uniform coating. Ultraviolet light emitted from a light source passes through the balloon to rapidly solidify the hydrogel, allowing it to adhere firmly to the tissue and thus improving the repair effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a balloon catheter provided in an embodiment of the present invention (without connection to the ultraviolet curing device). Figure 2 This is a schematic diagram of the structure of an ultraviolet curing device provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a balloon catheter provided in an embodiment of the present invention (connected to an ultraviolet curing device). Figure 4 This is a schematic diagram of the guidewire provided in one embodiment of the present invention; Figure 5 A schematic diagram of the structure of a balloon catheter (with guidewire connected) provided in an embodiment of the present invention. Figure 6 This is a schematic diagram of the guide wire provided in another embodiment of the present invention; Figure 7 A schematic diagram of the structure of a balloon catheter (with guidewire connected) provided for another embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. The terms "above" and "over," and any variations thereof, are intended to describe positional relationships and do not imply direct contact between the described objects.

[0021] As described in the background section, surgical injuries and even perforations frequently occur during surgeries in the human body, particularly in departments such as the gastrointestinal tract, bladder, and lungs. Existing remedial procedures are complex, slow to respond, and prone to serious medical accidents. While applying hydrogels to in vivo injury repair holds great potential, it faces the following challenges: 1. Conventional endoscopic spot application methods are prone to causing uneven coating of hydrogel in the body cavity environment; Second, existing curing methods are insufficient to achieve rapid and complete curing of hydrogels in minimally invasive settings, and the cured hydrogel does not adhere firmly to the tissue, affecting the repair effect.

[0022] To solve the above technical problems, please refer to Figures 1 to 7 An embodiment of this utility model provides a balloon catheter with a UV curing device, including a catheter 1 and a guide wire 9 inserted inside the catheter 1. An operating part 6 is fixedly connected to the proximal end of the catheter 1. A balloon 4 is covered on the outside of the catheter 1 and is located at the distal end of the catheter 1. The catheter 1 is in communication with the balloon 4.

[0023] The UV curing device 8 is pluggable and detachable within the catheter 1. The UV curing device 8 includes a light source 801, a connecting wire, a transmission rod 802, a handle 803, and a connecting plug 804. The light source 801 is encapsulated at the distal end of the transmission rod 802, the handle 803 is fixed at the proximal end of the transmission rod 802, and the connecting plug 804 is connected to the handle 803 for connecting to an external power source. The connecting wire is disposed within the transmission rod 802 and connects the light source 801 and the connecting plug 804. The operating part 6 is provided with an injection port 601 and an instrument inlet 602, both of which communicate with the catheter 1. The balloon 4 has a light-transmitting structure. After the handle 803 is assembled into the instrument inlet 602, the transmission rod 802 is located within the catheter 1, and the light source 801 is located inside the balloon 4.

[0024] In this embodiment, the injection port 601 is used to connect to an injection device, such as a 20-atmosphere water pump. This embodiment does not limit the liquid injected into the balloon 4 and can be set according to actual usage requirements. As a specific implementation, the liquid injected into the balloon 4 can be physiological saline. Therefore, when injecting physiological saline into the balloon 4, the injection port 601 needs to be connected to the injection device. The specific process of the injection device injecting physiological saline into the balloon 4 through the catheter 1 is as follows: physiological saline enters from the proximal end of the catheter 1. Because the distal end of the catheter 1 is a closed structure, the physiological saline flows out from the connecting structure on the catheter 1 and accumulates in the balloon 4, causing the balloon 4 to expand outwards. When the physiological saline is withdrawn from inside the catheter 1, the balloon 4 contracts back to its original state.

[0025] The catheter 1 is a hollow tubular structure, with a closed structure at the distal end and an open structure at the proximal end. The catheter 1 is connected to the balloon 4 through a connecting structure on the catheter 1.

[0026] Both the guide wire 9 and the UV curing device 8 can be inserted and removed into the conduit 1.

[0027] In one specific implementation, the guidewire 9 can be inserted and removed from the injection port 601 into the catheter 1, that is, the guidewire cavity and the injection cavity share the same channel. Therefore, the diameter of the catheter 1 can be greatly reduced, so that the catheter 1 can be inserted into the tube or cavity inside the human body through the instrument channel of the endoscope, realizing visual operation.

[0028] As a second specific implementation, the guidewire 9 can also be inserted and removed from the instrument access port 602 into the catheter 1, that is, the guidewire cavity and the light source channel share the same channel. Therefore, the diameter of the catheter 1 can be greatly reduced, so that the catheter 1 can be inserted into the tube or cavity in the human body through the instrument channel of the endoscope, and the visualization operation can be realized.

[0029] The instrument inlet 602 can be connected to the required instruments according to actual use; this embodiment does not limit the type of instruments. Since the guidewire 9 is also an instrument, it is preferable that the guidewire 9 can be inserted and removed through the instrument inlet 602 into the catheter 1. The working principle of the balloon catheter with UV curing device is as follows: Hydrogel application: Applying hydrogel to the damaged area inside the body through an endoscope; Balloon placement: Insert guidewire 9 into catheter 1 through instrument inlet 602. Guidewire 9 guides balloon 4 through endoscope to the damaged site coated with hydrogel. Insert the UV curing device: After pulling out the guide wire 9 and connecting the UV curing device 8 to the instrument inlet 602, the light source 801 extends to the inside of the balloon 4. Uniform hydrogel coating: Connect the injection port 601 to the injection device. The injection device injects physiological saline into the balloon 4 through the catheter 1. The balloon 4 expands and squeezes the hydrogel, so that the hydrogel is uniformly coated on the damaged area. Photocuring: When the light source 801 is working, the emitted ultraviolet light passes through the light-transmitting spherical capsule 4 to irradiate the hydrogel, which excites the photoinitiator in the hydrogel to produce active substances, causing the hydrogel monomers to cross-link and form a three-dimensional network structure, thus achieving rapid curing (curing time is usually a few seconds to a few minutes). Device removal: After curing is complete, the saline solution in balloon 4 is drained through catheter 1, causing balloon 4 to contract, and catheter 1 is pulled out.

[0030] In this embodiment, the hydrogel is applied to the damaged area by the expansion of the balloon 4, so that the hydrogel is evenly coated on the damaged area. The ultraviolet light emitted by the light source 801 passes through the balloon 4 to quickly solidify the hydrogel, so that the solidified hydrogel adheres firmly to the tissue, thereby improving the repair effect.

[0031] UV curing of hydrogels is a process that uses ultraviolet (UV) light to irradiate hydrogel materials, causing them to rapidly solidify. The principle of photocuring is primarily based on the action of photoinitiators; therefore, hydrogels contain photoinitiators. Photoinitiators are compounds that absorb light of specific wavelengths and convert it into chemically active substances. When an appropriate amount of photoinitiator is added to a hydrogel material, and the material is irradiated with UV light, the photoinitiator absorbs light energy and converts it into active substances that can cause a chemical reaction in the hydrogel. These active substances initiate a chain reaction, thereby cross-linking the monomer molecules in the hydrogel to form a three-dimensional network structure, thus solidifying the hydrogel into a solid. The cured hydrogel exhibits excellent mechanical properties, heat resistance, and chemical stability.

[0032] Since saline solution is injected into the balloon 4 through catheter 1, and saline solution is usually a conductor, it can easily cause safety hazards such as leakage current and breakdown of withstand voltage in the UV curing device 8. Therefore, in this embodiment, the light source 801 is encapsulated in a transparent and light-transmitting colloid at the far end of the transmission rod 802, and the end of the wire connected to the light source 801 is sealed inside the transmission rod 802. The transmission rod 802 is made of insulating material, which isolates the lighting module and the wire from the saline solution, thereby ensuring the electrical safety performance of the device.

[0033] This embodiment does not limit the specific type of the light source 801, as long as it can emit ultraviolet light, such as the UV-LED light source 801.

[0034] Furthermore, the handle 803 is detachably and fixedly connected to the instrument inlet 602, such as by snap-fit ​​or threaded connection.

[0035] Since the UV curing device 8 is inserted into the catheter 1 before the saline solution is injected into the balloon 4, the handle 803 is sealed in the instrument inlet 602 after the UV curing device 8 is connected to the instrument inlet 602 to prevent the saline solution from flowing out of the instrument inlet 602.

[0036] In this embodiment, the guidewire 9 is insertable and detachable within the catheter 1. The proximal end of the guidewire 9 is provided with an insertion and removal structure 10. The insertion and removal structure 10 is detachably and fixedly connected to the instrument inlet 602, such as by snap-fit ​​or threaded connection.

[0037] In one implementation, the plug-in structure 10 is a screw cap, which is threadedly connected to the instrument inlet 602 via matching internal and external threads.

[0038] In this embodiment, please refer to Figure 4 and Figure 5 Guidewire 9 can be a one-piece structure or a separate structure; please refer to [reference needed]. Figure 6 and Figure 7 .

[0039] For one specific implementation method, please refer to Figure 6 and Figure 7 The guidewire 9 includes a first guidewire 901 and a second guidewire 902 that are separated from each other inside the balloon 4. The insertion and removal structure 10 is disposed at the proximal end of the first guidewire 901. The distal end of the first guidewire 901 can pass through the operating part 6 and enter the catheter 1. The second guidewire 902 is fixed to the distal end of the catheter 1.

[0040] In this embodiment, catheter 1 can be an integral structure or a split structure.

[0041] In one specific implementation, the catheter 1 is separated into a first tube 101 and a second tube 103 inside the balloon 4. The proximal end of the first tube 101 is fixedly connected to the operating part 6. The two ends of the balloon 4 are fixedly connected to the outer walls of the first tube 101 and the second tube 103, respectively. The cross-section 102 between the distal end of the first tube 101 and the proximal end of the second tube 103 forms a communication channel between the catheter 1 and the balloon 4. The insertion depth of the second guidewire 902 into the first tube 101 is greater than the separation distance between the first tube 101 and the second tube 103 when the balloon 4 is inflated.

[0042] When the second tube 103 moves longitudinally forward (forward is the direction away from the operating part), the second guidewire 902 moves longitudinally forward along with it. At this time, the first tube 101 moves relatively backward along the axis of the catheter 1. Since the second guidewire 902 extends from the inside of the second tube 103 to the inside of the first tube 101, and the insertion depth of the second guidewire 902 into the first tube 101 is greater than the separation distance between the first tube 101 and the second tube 103 when the balloon 4 is inflated, it can ensure that the entire catheter 1 will not bend or deform at the cross-section of the catheter 1, thus playing a good connection and guiding role.

[0043] In this embodiment, since the catheter 1 is divided into two segments within the balloon 4 (i.e., the area corresponding to the inside of the balloon 4), during the procedure, when fluid is injected, the balloon 4 expands outward and extends longitudinally. The second tube 103 can also move longitudinally forward accordingly. This prevents the balloon 4 from bending due to the stretching deformation of the catheter 1. After the balloon 4 is inserted into a narrow tube or cavity, such as the ureter in the human body, it can expand evenly, ensuring uniform force on each side wall of the narrow tube or cavity. The separate design of the two-segment catheter 1 avoids the situation where the catheter 1 is a one-piece structure. When the balloon 4 expands and extends longitudinally, the catheter 1 undergoes longitudinal stretching deformation. Due to the different materials of the catheter 1 and the balloon 4, the deformation of the catheter 1 will cause the expanded balloon 4 to bend and deform, resulting in uneven expansion force on the surface of the balloon 4 during expansion. This leads to uneven force on each side wall of the narrow tube or cavity that needs to be expanded, resulting in poor treatment effects and causing more discomfort to the patient.

[0044] The second guidewire 902 is inserted into the first tube 101. The insertion depth of the second guidewire 902 into the first tube 101 is greater than the separation distance between the first tube 101 and the second tube 103 when the balloon 4 is inflated. This ensures that the second guidewire 902 will not come out of the first tube 101 when the balloon 4 is inflated. As a result, the first tube 101 and the second tube 103 remain basically on the central axis of the catheter 1 when separated. This further ensures that the balloon 4 will not bend or deform when inflated, making the force on each side wall of the narrow tube or cavity that needs to be expanded more uniform, and greatly improving the treatment effect.

[0045] Furthermore, the first tube 101 of the balloon 4 is provided with one or more through holes on its wall, which serve as a connecting structure to connect the first tube 101 and the balloon 4. The through holes are located between the end of the second guide wire 902 inserted into the first tube 101 and the connection between the first tube 101 and the balloon 4, that is, the through holes are located on the side of the end of the second guide wire 902 inserted into the first tube 101 near the operating part 6.

[0046] In this embodiment, in order to determine the accurate position of the balloon 4 within the tube or cavity of the human body, the position of the balloon 4 within the tube or cavity of the human body can also be determined by X-ray imaging recording technology using a contrast ring. The device also includes a contrast ring, which is disposed at the connection between the distal end of the balloon 4 and the catheter 1 and / or the connection between the proximal end of the balloon 4 and the catheter 1.

[0047] In one specific implementation, a radiopaque ring 3 is provided at the connection between the distal end of the balloon 4 and the catheter 1. The second guidewire 902 is fixedly connected to the inner side of the radiopaque ring 3 by a fixing process, which includes glue fixing or heat fusion fixing. Other fixing structures or fixing components can also be used to fix the two together.

[0048] Furthermore, the internal sealing of the catheter 1 within the area covered by the imaging ring 3 prevents the injected liquid from entering the front of the imaging ring (i.e., away from the operating part 6), and instead keeps it inside the balloon 4 behind the imaging ring (i.e., close to the operating part 6), thereby accelerating the injection speed and further shortening the operation time.

[0049] In this embodiment, the material of the catheter 1 between the imaging ring 3 and the operating part 6 can typically be PEEK, but nylon, polyeneamine, or other materials can also be used, with PEEK being the preferred material. PEEK material has the advantages of a small diameter and good rigidity, allowing the size of the catheter 1 behind the imaging ring to reach 0.6–1.5 mm, preferably 0.7–1.0 mm, and most preferably 0.8 mm. The Shore hardness of the catheter 1 can reach 50D–95D, preferably 80D–90D. Using PEEK material can further reduce the diameter of the catheter 1 while ensuring its guiding function, thereby improving the diagnostic and treatment effect and reducing patient discomfort.

[0050] Preferably, a tip catheter 2 can be provided at the distal end of catheter 1, with the second guidewire 902 extending into the tip catheter 2. The tip of the tip catheter 2 extends approximately 0.5mm-2mm beyond the top of the second guidewire 902, meaning the distance from the end of the second guidewire 902 within the tip catheter 2 to the tip of the tip catheter 2 at the front end of the imaging ring is 0.5mm-2mm. In this embodiment, the tip catheter 2 is made of a soft polymer material, preferably TPU. Using a soft material for the tip catheter 2 avoids damage to the ureteral wall caused by inserting a hard material, increasing the probability of surgical success. Simultaneously, since the tip catheter 2 also includes a portion of the second guidewire 902, it possesses a certain degree of rigidity, enabling it to guide catheter 1 into the body. The length of the distal end of the tip catheter 2 extending beyond the guidewire 902 is within the range of 0.5mm-2mm. If the length is less than 0.5mm, the second guidewire 902 may easily puncture the tip of catheter 1 during insertion; if the length is greater than 2mm, the distal end of catheter 1 will be too soft to insert. Therefore, a length of 0.5mm-2mm is a suitable range.

[0051] Furthermore, the distal end of the aforementioned tip catheter 2 can be configured as a spherical structure. The smooth spherical surface design of the spherical structure can guide the catheter 1 to be inserted into the human body, reducing damage to the wall of the tube or cavity inside the human body.

[0052] In this embodiment, a scale line is provided on the outer peripheral surface of the catheter 1 between the proximal end of the balloon 4 and the operating part 6. The scale line can be an equidistant scale line, so that the insertion depth of the balloon 4 can be observed by imaging with an endoscope.

[0053] Preferably, the outer wall of the catheter 1 near the operating part 6 is provided with scale markings, such as 60cm, 80cm and 100cm, to mark the distance of the catheter 1 into the internal tube or cavity of the human body. The operator can intuitively observe the length of the catheter 1 inserted through the scale markings.

[0054] Preferably, the guide wire 9 in this embodiment is a metal guide wire, which can be made of metal materials such as nickel-titanium alloy or stainless steel, and more preferably nickel-titanium alloy. Nickel-titanium alloy is a shape memory alloy, a special alloy that can automatically recover its original shape after plastic deformation at a specific temperature. Its elongation rate is over 20%, its fatigue life reaches 1*10^7, its damping characteristics are 10 times higher than ordinary springs, and its corrosion resistance is superior to the best medical stainless steel currently available. Therefore, it can meet the application needs of various engineering and medical fields, making it an excellent functional material. In addition to its unique shape memory function, shape memory alloys also have excellent characteristics such as wear resistance, corrosion resistance, high damping, and superelasticity. Using nickel-titanium alloy as a metal guide wire can greatly extend the service life of instruments and reduce instrument wear rate.

[0055] The transmission rod 802 supports the connecting wire and facilitates the insertion of the light source 801 from the instrument inlet 602 into the catheter 1.

[0056] If the conduit 1 is a flexible tube or a combination of flexible and rigid tube, then the transmission rod 802 is also flexible, such as being made of nickel-titanium alloy.

[0057] In this embodiment, the operating part 6 is also provided with a catheter interface 603, which is connected to the proximal end of the catheter 1. The injection port 601 and the instrument inlet 602 are both connected to the catheter 1 through the catheter interface 603. The injection port 601, the instrument inlet 602 and the catheter interface 603 form a Y-shaped structure, and the catheter interface 603 and the instrument inlet 602 are coaxial with the catheter 1. After the ultraviolet curing device 8 is connected and assembled to the instrument inlet 602, the handle 803 seals the instrument inlet 602.

[0058] In this embodiment, the instrument inlet 602 is a first Luer interface, and the handle 803 is provided with a second Luer interface adapted to the first Luer interface. One of the first Luer interface and the second Luer interface is a male interface, and the other is a female interface.

[0059] To facilitate control of the opening and closing of the injection port 601, a two-way stopcock 7 can be installed on the injection port 601. The stopcock 7 has a stopcock through hole. When the stopcock through hole is coaxial with the injection port 601, the two-way stopcock 7 is opened when the stopcock through hole is rotated; when the stopcock through hole is perpendicular to the injection port 601, the two-way stopcock 7 is closed.

[0060] This embodiment does not limit the connection method between the two-way stopcock 7 and the injection port 601, such as threaded connection, snap-fit, etc. As a specific implementation, the two-way stopcock 7 is fixed to the injection port 601 with a nut. An injection device is connected to the two-way stopcock 7. When the two-way stopcock 7 is rotated to open the injection port 601, liquid can be injected into the catheter 1 through the injection device. When the two-way stopcock 7 is rotated to close the liquid channel, it can prevent external contaminants, dust, etc., from entering the human body's channels or cavities through the catheter 1, causing infection. Furthermore, it can maintain the expansion pressure to prevent liquid from flowing out of the balloon 4, thus stabilizing the shape of the occlusive balloon 4. Compared with existing injection structures, the design of the two-way stopcock 7 is significant. Existing injection structures require pushing and pulling an operating handle or other structures to control the opening or closing of the injection port. The connection between the operating handle and the catheter 1 is not fixed, and the operating handle is easily damaged by repeated pushing and pulling. In this embodiment, the two-way catheter 1 opens and closes the liquid channel through rotation, resulting in a simple structure, ease of operation, and extended instrument lifespan.

[0061] In this embodiment, the instrument inlet 602, the end of the two-way stopcock 7 (i.e. the end connected to the injection device), and the second Luer interface on the handle 803 are all standard Luer interfaces. Luer interfaces are highly versatile and can be configured with different instruments.

[0062] To simplify the structure of the operating unit 6, eliminating the need for the two-way stopcock 7 while ensuring the presence of the Luer interface, the operating unit 6 can adopt a three-way Luer connector. The three-way Luer connector includes a three-way body and a switch. The three-way body is provided with three standard Luer interfaces, namely the catheter interface 603, the injection port 601, and the instrument inlet 602. The switch is located on the three-way body, and the opening and closing of the three Luer interfaces can be achieved by operating the switch.

[0063] In summary, this invention uses an expanding balloon to compress and coat the hydrogel onto the damaged area, ensuring uniform coating. Ultraviolet light emitted from a light source then passes through the balloon to rapidly solidify the hydrogel, allowing it to adhere firmly to the tissue and thus improving the repair effect.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A balloon catheter with a UV curing device, comprising a catheter and a guidewire inserted inside the catheter, wherein an operating part is fixedly connected to the proximal end of the catheter, and a balloon is covered on the outside of the catheter, the balloon being located at the distal end of the catheter; the catheter is in communication with the balloon; characterized in that, The UV curing device is insertable and detachable within the catheter; the UV curing device includes a light source, a connecting wire, a transmission rod, a handle, and a connecting plug. The light source is encapsulated at the distal end of the transmission rod, the handle is fixed at the proximal end of the transmission rod, and the connecting plug is connected to the handle for connecting to an external power source; the connecting wire is disposed within the transmission rod and connects the light source and the connecting plug; the operating part is provided with an injection port and an instrument inlet, both of which communicate with the catheter; the balloon has a light-transmitting structure, the handle is assembled into the instrument inlet, the transmission rod is located within the catheter, and the light source is located inside the balloon.

2. The balloon catheter with UV curing device according to claim 1, characterized in that, The light source is encapsulated at the far end of the transmission rod by a light-transmitting adhesive.

3. The balloon catheter with UV curing device according to claim 1, characterized in that, The light source is a UV-LED light source.

4. The balloon catheter with UV curing device according to claim 1, characterized in that, The conductive rod is made of insulating material.

5. The balloon catheter with UV curing device according to claim 1, characterized in that, The handle is detachably and fixedly connected to the instrument inlet. After the handle is installed in the instrument inlet, the handle seals the instrument inlet.

6. The balloon catheter with UV curing device according to claim 5, characterized in that, The operating part is also provided with a catheter interface, which is connected to the proximal end of the catheter. The injection port and the instrument inlet are both connected to the catheter through the catheter interface. The injection port, the instrument inlet and the catheter interface are in a Y-shaped structure, and the catheter interface and the instrument inlet are coaxial with the catheter.

7. The balloon catheter with UV curing device according to claim 6, characterized in that, The instrument inlet is a first Luer interface, and the handle is provided with a second Luer interface adapted to the first Luer interface. One of the first Luer interface and the second Luer interface is a male interface, and the other is a female interface.

8. The balloon catheter with UV curing device according to claim 6, characterized in that, The injection port is also provided with a two-way stopcock. The stopcock has a through hole. When the through hole is coaxial with the injection port, the two-way stopcock is open. When the through hole is perpendicular to the injection port, the two-way stopcock is closed.

9. The balloon catheter with UV curing device according to claim 6, characterized in that, The operating part is a three-way Luer connector.

10. The balloon catheter with UV curing device according to claim 1, characterized in that, The guidewire is insertable and removable within the catheter, and the proximal end of the guidewire is provided with an insertion and removal structure, which is detachably and fixedly connected to the instrument inlet.

11. The balloon catheter with UV curing device according to claim 1, characterized in that, The catheter is separated into a first tube and a second tube inside the balloon. The proximal end of the first tube is fixedly connected to the operating part. The two ends of the balloon are fixedly connected to the outer walls of the first tube and the second tube, respectively. The cross-section between the distal end of the first tube and the proximal end of the second tube forms a communication channel between the catheter and the balloon.

12. The balloon catheter with UV curing device according to claim 11, characterized in that, The guidewire includes a first guidewire and a second guidewire that are separated from each other inside the balloon. The distal end of the first guidewire can pass through the operating part and enter the catheter, and the second guidewire is fixed to the distal end of the catheter.

13. The balloon catheter with UV curing device according to claim 12, characterized in that, The proximal end of the second guidewire is inserted into the first tube to a depth greater than the separation distance between the first and second tubes during balloon inflation.

14. The balloon catheter with UV curing device according to claim 11, characterized in that, The first tube inside the balloon also has several through holes on its wall.

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