Capsule switching device

Abstract

The utility model relates to the field of medical catheters used in human body cavities. The balloon switching device comprises a switching balloon, a switching device and a pushing device, the switching device comprises a switching front end and a switching rear end, the switching front end and the switching rear end are tubular, a spring button is arranged at the near end of the switching front end, a groove is formed in the position, corresponding to the spring button, of the inner wall of the switching front end, and a one-way barb is arranged at the far end of the switching rear end. The far end of the one-way barb is connected with the far end of the switching rear end, the near end of the one-way barb is a warped elastic piece, the near end of the switching balloon is bonded with the far end of the switching front end, and the near end of the switching rear end is bonded with the far end of the pushing device. A plurality of different types of products can be linked together in a free combination mode through the switching device, a doctor can select a corresponding capsule product to be directly connected with the pushing rod according to the actual situation of a patient, other products do not need to be called again for treatment, the multifunctional capsule set meets all the requirements of the doctor and the patient, and the use is convenient. Meanwhile, the operation cost is also reduced.

Description

Technical Field

[0001] This utility model relates to medical catheters used in human cavities, and more particularly to a capsule adapter. Background Technology

[0002] Currently, there are various types of medical catheter products, including ordinary balloons, irregularly shaped balloons, drug-eluting balloons, and microporous balloons. However, the clinical application of a single balloon product is very limited. The conditions of doctors and patients are complex and diverse, and in reality, multiple balloon products with different structures are needed to meet the treatment needs of the same surgery. Utility Model Content

[0003] This utility model provides a capsule transfer device, including a transfer balloon, a transfer device, and a push device. The transfer device includes a transfer front end and a transfer rear end, which are tubular. The proximal end of the transfer front end is provided with a spring button, and the inner wall of the transfer front end is provided with a groove corresponding to the position of the spring button. The distal end of the transfer rear end is provided with a one-way barb, which is a spring piece that connects the distal end of the transfer rear end and the proximal end. The proximal end of the transfer balloon is bonded to the distal end of the transfer front end, and the proximal end of the transfer rear end is bonded to the distal end of the push device.

[0004] When the one-way hook is manually pushed to the inside of the spring button position, it automatically expands and locks securely, achieving a tight connection between the adapter front and rear ends. This ensures it will not detach during internal use, providing both sturdiness and flexibility. To unlock the adapter, press the spring button on the adapter front, and the one-way hook will retract. Then, pull the adapter front and rear ends apart to unlock. The optimal number of matching spring buttons and one-way hooks is 1 to 6.

[0005] Preferably, the conversion device is designed to be made of a rigid polymer material, which is harder than the soft polymer material at the front end of the capsule adapter but softer than the metal material at the proximal end of the capsule adapter. This design effectively controls the transition from the soft polymer material to the metal material, reducing the risk of the product breaking in the body due to excessive pushing force.

[0006] Preferably, the conversion balloon consists of, from distal to proximal, a tip, an integrally molded balloon body, a distal rod, a quick-exchange port, and a proximal rod.

[0007] Preferably, the tip, the distal rod, and the proximal rod are all tubular, the distal rod includes a channel a and a channel b, the distal end of the channel a communicates with the inner cavity of the tip, the proximal end of the channel a is connected to the quick exchange port, and the proximal end of the channel b communicates with the inner cavity of the proximal rod.

[0008] Preferably, the component is tubular, and the pushing device consists of a transition section, a stress relief section, and a guide tube seat from the distal end to the proximal end.

[0009] Preferably, the integrally molded capsule is made by one-time blow molding, and the integrally molded capsule includes a gourd-shaped capsule, a chocolate capsule, a papillary capsule, a spinous capsule, and a microporous capsule.

[0010] Preferably, a drug is attached to the surface of the integrally molded capsule, and the drug is one of the following: cell inhibitor, microtubule inhibitor, immunosuppressant, anti-inflammatory agent, anti-inflammatory agent, anticoagulant, mitotic inhibitor, thrombosis inhibitor, lipid-lowering agent, and antioxidant.

[0011] Preferably, the surface of the integrally molded capsule is provided with holes.

[0012] Preferably, a developing ring is provided on the outer surface of the tube wall where channel a is located, the developing ring being positioned corresponding to the shoulder of the integrally molded capsule, and a coating is provided on the outer surface of the tube wall where channel a is located.

[0013] Preferably, the transition section can be made of metal, and the front end of the transition section is designed as a metal wire, a metal spiral structure plus a metal wire, or a metal spiral structure plus a tubular metal oblique structure; the transition section can be made of polymer material, and the front end of the transition section can be a woven structure, a double-cavity structure, or a multi-cavity structure.

[0014] Compared to existing technologies, its advantages are as follows: the unidirectional hook not only automatically expands and locks when pushed into place, but also can be easily retracted by pressing a spring button when unlocking is needed. Both connection and unlocking processes require no complex tools, making operation simple. Multiple different types of products can be freely combined via an adapter, ensuring a secure and resistant connection. The unidirectional design of the buckle guarantees that the connected products will not detach during delivery, treatment, or retraction within the body, offering higher safety than adhesive bonding. Most importantly, doctors can select the appropriate capsule product and connect it directly to the back-end delivery device based on the patient's specific situation, eliminating the need to use other products for treatment. A single multi-functional capsule kit meets all the needs of both doctors and patients, while also significantly reducing surgical costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a bare capsule and a drug-filled capsule structure according to Embodiment 1 of this utility model;

[0016] Figure 2 This is a schematic diagram of a capsule and various transitional forms in Embodiment 2 of this utility model;

[0017] Figure 3 This is a schematic diagram of various transitional forms designed according to Embodiment 2 of this utility model;

[0018] Figure 4 This is a partially enlarged structural diagram of the spring button in Embodiment 2 of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection process between the adapter front end and the adapter back end in Embodiment 2 of this utility model;

[0020] Figure 6 This is a schematic diagram of the unlocking process between the adapter front end and the adapter back end in Embodiment 2 of this utility model;

[0021] Figure 7 This is a schematic diagram showing the connection between the three capsule structures and the metal transition section in Embodiment 3 of this utility model;

[0022] Figure 8 This is a schematic diagram showing the connection between the seven capsule structures and the metal transition section in Embodiment 4 of this utility model;

[0023] Figure 9 This is a schematic diagram showing the connection between the seven capsule structures and the polymer transition section in Embodiment 5 of this utility model;

[0024] In the diagram: 1. Tip; 211. Bare balloon; 2111. Drug-loaded balloon; 212. Variable diameter bare balloon; 213. Cutting balloon; 214. Chocolate balloon; 215. Papillary balloon; 216. Circular cutting balloon; 217. Infusion balloon; 3. Distal rod; 4. Proximal rod; 5. Adapter; 511. Adapter front end; 512. Adapter rear end; 513. One-way barb; 514. Spring button; 6. Transition section; 7. Stress relief section; 8. Catheter hub; 9. Quick exchange port. Detailed Implementation

[0025] The specific content of this utility model is further explained below with reference to the accompanying drawings and embodiments:

[0026] 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, showing not only embodiments of bare capsules and drug-loaded capsules, but also embodiments of quick-exchange and integral-exchange types. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Example

[0027] like Figure 1As shown, this embodiment is a combination of a bare capsule 211 and a drug-filled capsule 2111. The structure is designed as follows: the tip 1 is connected to the bare capsule 211 or the drug-filled capsule 2111. The capsule is an integrally formed structure. The other end of the capsule is connected to the distal rod 3. The other end of the distal rod is connected to the proximal rod 4. A quick exchange port 9 is designed between the distal rod and the proximal rod. The other end of the proximal rod is connected to the adapter front end 511 in the adapter 5. The adapter front end 511 and the adapter rear end 512 are connected by a spring button 514 and a barb structure in a flexible one-way barb 513. The adapter rear end 512 is connected to the transition section 6. The transition section 6 is connected to the stress relief section 7. The other end of the stress relief section 7 is connected to the catheter seat 8.

[0028] For example, the bare capsule 211 is connected to the rear end of the conversion device via a one-way barb. With the support of a microcatheter, a matching guidewire is passed through the lesion. The guidewire is then inserted into the tip 1 of the conversion device. Due to its structural design, the guidewire quickly exits from the end of the distal rod 3 through the quick-exchange port 9. The conversion device continues to advance until it approaches the lesion by approximately 1-10 mm. Then, pressure is rapidly applied along the catheter seat 8 to inflate the capsule, expanding the narrowed area within the body cavity. After approximately 30 seconds, the pressure is released, the conversion device is withdrawn, and the spring button is pressed to disconnect the bare capsule 211 from the pusher. The drug-loaded capsule is then unidirectionally connected to the rear end of the conversion device. The above steps are repeated. Pressure is applied to ensure the drug on the capsule fully binds to the cells on the blood vessel wall, achieving the desired therapeutic effect. Expansion is stopped, the conversion device is withdrawn, and the guide tube and guidewire are withdrawn sequentially, completing the treatment. Example

[0029] like Figure 2 As shown, this embodiment is a structure combining a capsule and multiple transitional forms, designed as follows: The front-end structure remains unchanged, still consisting of: tip 1 connected to multiple capsules, a one-piece molded capsule structure, the other end of the capsule connected to distal rod 3, the other end of distal rod 3 connected to proximal rod 4, a quick exchange port 9 designed between distal rod 3 and proximal rod 4, the other end of proximal rod 4 connected to adapter front end 511 in adapter 5, adapter front end 511 and adapter rear end 512 connected via spring button 514 and barb structure in flexible one-way barb 513, adapter rear end 512 connected to transition section 6, the front end of transition section 6 has two designs, which can be connected via adapter 5 according to surgical needs, the rear end of transition section 6 connected to stress relief section 7, the other end of stress relief section 7 connected to catheter seat 8; note that the design of the front end of transition section 6 is related to the transmission of the pushing force required for surgery.

[0030] For example, this embodiment mainly illustrates that the switching device can also achieve rapid switching between push devices with different designs. In reality, different surgical application areas require different front-end designs for the push device. If the surgery is in the coronary artery field, a filamentous structure design at the front end is often chosen. If the surgery is in the intracranial field, a design with a spiral oblique filamentous structure at the front end is often chosen. Other peripheral and pulmonary artery surgeries can refer to the designs of coronary artery surgery or intracranial surgery, or they can be modified to other structural designs. Similarly, if the complexity of the lesion during surgery is different, different designs of the front end of the push device can be selected to achieve the purpose of quickly reaching the lesion. Specifically, the capsule is connected to the pusher via a spring button and a flexible one-way barb structure. Supported by a microcatheter, a matching guidewire is passed through the lesion. The guidewire is then inserted into the tip of the switching device. Due to its design, the guidewire quickly exits through the exchange port 9 at the end of the distal rod 3. The switching device continues to advance until it approaches the lesion by approximately 1-10 mm. Then, pressure is rapidly applied along the catheter seat 8 to inflate the capsule, expanding the narrowed area within the body cavity. After approximately 30 seconds, the pressure is released, and the switching device is withdrawn. If surgery requires, pressing the spring button on the switching device allows switching between different pushers for appropriate surgical treatment. Finally, the guide tube and guidewire are withdrawn sequentially, completing the treatment. Example

[0031] like Figure 7 As shown, this embodiment is a combination of a bare capsule 211, a cutting capsule 213, and an infusion capsule 217. The structure is designed as follows: the tip 1 is connected to the bare capsule 211, the cutting capsule 213, or the infusion capsule 217. The capsule is an integrally formed structure. The other end of the capsule is connected to the distal rod 3. The other end of the distal rod 3 is connected to the proximal rod 4. A quick exchange port 9 is designed between the distal rod 3 and the proximal rod 4. The other end of the proximal rod 4 is connected to the adapter front end 511 in the adapter device 5. The adapter front end 511 and the adapter rear end 512 are connected by a spring button and a barb structure in a flexible one-way barb. The adapter rear end 512 is connected to the transition section 6. The transition section 6 is connected to the stress relief section 7. The other end of the stress relief section 7 is connected to the catheter seat 8.

[0032] For example, the bare capsule 211 is connected to the rear end of the conversion device via a one-way barb. With the support of a microcatheter, a matching guidewire is passed through the lesion. The guidewire is then inserted into the tip 1 of the conversion device. Due to its structural design, the guidewire exits quickly from the end of the distal rod 3 through the rapid exchange port 9. The conversion device continues to advance until it approaches the lesion by approximately 1-10 mm. Then, pressure is rapidly applied along the catheter seat 8 port to inflate the capsule, expanding the narrowed area within the body cavity. After approximately 30 seconds, the pressure is released, the conversion device is withdrawn, and the spring button is pressed to disconnect the bare capsule 211 from the pushing device. The capsule is then cut. Connect 213 to the rear end of the conversion device and continue repeating the above steps. After pressure is applied, the three sharp parts on the cyst are expanded deep into the blood vessel wall covered by the thrombus, creating three deep incisions at the site of thrombus coagulation, blocking cell binding, preventing further intimal proliferation, and achieving the result of treating the lesion. Stop the expansion, release the pressure and withdraw the conversion device. Press the spring button 514 to disconnect the cutting cyst 213 from the pushing device, and connect the perfusion cyst 217 to the rear end 512 of the conversion device. Continue repeating the above steps to inject liquid medication. The medication seeps out from the micropores of the cyst and flows onto the blood vessel wall, achieving the therapeutic effect. The injected medication is determined based on the clinical symptoms and may be one or more of the following: cell inhibitors, microtubule inhibitors, immunosuppressants, anti-inflammatory agents, anticoagulants, mitotic inhibitors, thrombosis inhibitors, lipid-lowering agents, and antioxidants. In this embodiment, the medication is an antibiotic, paclitaxel and its derivatives, taxane, paclitaxel, docetaxel, epothilone, nocodazole, cabazitaxel, compressortine, docetaxel trihydrate, vinorelbine tartrate, compressortine disodium phosphate, albendazole, triclobenzazole, vinflunidine tartrate, rapamycin and its derivatives, everolimus, zotamolimus, tacrolimus, biolimus, tansimolimus, rhein, desfolimus, and 5-fluorourine. One or more of the following drugs were used: pyrimidine, dexamethasone, probucol, colchicine, heparin, warfarin, vitamin K antagonists, aspirin, prostaglandins, nitrates, lysine aspirin, dipyridamole, vinblastine, vincristine, vinblastine, griseofulvin, penicillin, cephalosporins, actinomycin D, daunorubicin, doxorubicin and its derivatives, camptothecin and its derivatives, antibody-based antitumor drugs, cyclophosphamide, cisplatin, acemetidine, resveratrol, argatroban, statins, aminopyrine, antifungals, arsenic trioxide, aspirin, berberine, ginkgo biloba extract, hormones, alkaloids, Tripterygium wilfordii compounds, salinomycin, tirofiban, abciximab, and eptifibatide. Infusion was then stopped, and the guiding catheter and guidewire were withdrawn sequentially to complete the treatment. Example

[0033] like Figure 8As shown, this embodiment has a structure with 7 different capsule combinations. The structure is designed as follows: the tip 1 is connected to 2 to 7 different capsules; the capsule 2 is an integrally formed structure; the other end of the capsule 2 is connected to the distal rod 3; the other end of the distal rod 3 is connected to the proximal rod 4; a quick exchange port 9 is designed between the distal rod 3 and the proximal rod 4; the other end of the proximal rod 4 is connected to the adapter front end 511 in the adapter 5; the adapter front end 511 and the adapter rear end 512 are connected by a spring button 514 and a barb structure in a flexible one-way barb 513; the adapter rear end 512 is connected to the transition section 6; the transition section 6 is connected to the stress relief section 7; and the other end of the stress relief section 7 is connected to the catheter seat 8.

[0034] For example, the bare capsule 211 is connected to the rear end of the conversion device via a one-way barbed structure. In the case of a variable-diameter vessel, a variable-diameter bare capsule 212 can be selected. With the support of a microcatheter, the matching guidewire is passed through the lesion. Then, the guidewire is inserted into the tip of the conversion device. Due to the structural design, the guidewire will quickly exit from the end of the distal rod 3 through the rapid exchange port 9. The conversion device continues to advance until it is close to the lesion by about 1-10 mm. Then, pressure is rapidly applied along the port of the catheter seat 8 to inflate the capsule and expand the narrow part of the body cavity. After an interval of about 30 seconds, the pressure is released, the conversion device is withdrawn, the spring button is pressed to disconnect the bare capsule 211 from the pusher, and the cut capsule 2 is removed. 13 is connected to the rear end of the conversion device. If the clinical condition is complex, a chocolate balloon 214, a papillary balloon 215, or a ring-shaped cutting balloon 216 can be selected. The above steps are repeated, and after compression, the sharp part on the balloon is expanded to penetrate deep into the thrombus-covered blood vessel wall, creating a deeper incision at the site of thrombus formation, blocking cell binding, preventing further intimal proliferation, and achieving the therapeutic effect. Expansion is stopped, pressure is released, and the conversion device is withdrawn. The spring button is pressed to disconnect the cutting balloon from the pushing device, and the perfusion balloon 217 is connected to the rear end of the conversion device. The above steps are repeated to inject liquid medication. The medication seeps out from the micropores of the balloon and flows onto the blood vessel wall, achieving the therapeutic effect. The injected medication is determined according to the clinical condition and can be one or more of the following: cell inhibitors, microtubule inhibitors, immunosuppressants, anti-inflammatory agents, anti-inflammatory drugs, anticoagulants, mitotic inhibitors, thrombosis inhibitors, lipid-lowering agents, and antioxidants. In this embodiment, the medication is one or more of heparin, paclitaxel, and rapamycin. Afterwards, the infusion was stopped, and the guiding catheter and guide wire were withdrawn one after another, completing the treatment. Example

[0035] like Figure 9As shown, this embodiment features a structure with seven different capsule combinations. The structural design differs from previous embodiments. This design is an overall interchangeable design, specifically as follows: Tip 1 is connected to capsules 2 to 7, forming a single, integral structure. The other end of the capsule is connected to the proximal rod 3, and the other end of the proximal rod 3 is connected to the adapter front end 511 in adapter 5. The adapter front end 511 and adapter rear end 512 are connected via a spring button 514 and a barb structure in a flexible one-way barb 513. The adapter rear end 512 is connected to the transition section 6, which is connected to the stress relief section 7. The other end of the stress relief section 7 is connected to the catheter seat 8. In this embodiment, the transition section is made of polymer material, and the cavity is a dual-cavity structure.

[0036] For example, the bare capsule 211 is connected to the rear end of the conversion device via a one-way barbed structure. In the case of a variable-diameter vessel, a variable-diameter bare capsule 212 can be selected. With the support of a microcatheter, the matching guidewire is passed through the lesion. Then, the guidewire is inserted into the tip of the conversion device. Due to the structural design, the guidewire will exit from the center of the catheter seat 8. The conversion device continues to advance until it is about 1-10 mm close to the lesion. Then, pressure is rapidly applied along the port of the catheter seat 8 to inflate the capsule, expanding the narrowed part of the body cavity. After an interval of about 30 seconds, the pressure is released, the conversion device is withdrawn, the spring is pressed to release the connection between the bare capsule 211 and the pushing device, and the cutting capsule 213 is connected to the conversion device. For complex clinical conditions, the device's rear end can be connected to either a chocolate balloon 214, a papillary balloon 215, or a circular cutting balloon 216. The above steps are repeated, and after compression, the sharp part of the balloon expands deep into the thrombus-covered vessel wall, creating a deeper incision at the site of the thrombus, blocking cell adhesion, preventing further intimal proliferation, and achieving the therapeutic effect. Expansion is stopped, pressure is released, and the conversion device is retracted. The spring button is pressed to disconnect the cutting balloon 213 from the pushing device, and the perfusion balloon 217 is connected to the rear end of the conversion device. The above steps are repeated to inject liquid medication, which seeps from the micropores of the balloon and flows onto the vessel wall, achieving the therapeutic effect. The injected medication is determined based on the clinical symptoms and may be one or more of the following: cell inhibitors, microtubule inhibitors, immunosuppressants, anti-inflammatory agents, anticoagulants, mitotic inhibitors, thrombosis inhibitors, lipid-lowering agents, and antioxidants. In this embodiment, the medication is an antibiotic, paclitaxel and its derivatives, taxane, paclitaxel, docetaxel, epothilone, nocodazole, cabazitaxel, compressortine, docetaxel trihydrate, vinorelbine tartrate, compressortine disodium phosphate, albendazole, triclobenzazole, vinflunomide tartrate, rapamycin and its derivatives, everolimus, zotamolimus, tacrolimus, biofloxacin, tansimolimus, rhein, desfolimus, 5-fluorouracil, and diclofenac. The treatment regimen includes one or more of the following drugs: dexamethasone, probucol, colchicine, heparin, warfarin, vitamin K antagonists, aspirin, prostaglandins, nitrates, lysine aspirin, dipyridamole, vinblastine, vincristine, vinblastine, griseofulvin, penicillin, cephalosporins, actinomycin D, daunorubicin, doxorubicin and its derivatives, camptothecin and its derivatives, antibody-based antitumor drugs, cyclophosphamide, cisplatin, acemetidine, resveratrol, argatroban, statins, aminopyrine, antifungals, arsenic trioxide, aspirin, berberine, ginkgo biloba extract, hormones, alkaloids, Tripterygium wilfordii compounds, salinomycin, tirofiban, abciximab, epitubatide, heparin, and rapamycin. Infusion is then stopped, and the guiding catheter and guidewire are withdrawn sequentially to complete the treatment.

[0037] The above description is only a preferred embodiment of the present utility model. The above specific embodiments are illustrative and not restrictive. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A capsule switching device comprising a switching balloon, a switching device (5) and a pushing device, characterized in that, The conversion device (5) comprises a front adapter (511) and a rear adapter (512), the front adapter (511) and the rear adapter (512) are tubular, the front adapter (511) is provided with a spring button (514) at the proximal end, the inner wall of the front adapter (511) is provided with a groove at the position corresponding to the spring button (514), the rear adapter (512) is provided with a one-way barb (513) at the distal end, the one-way barb (513) is a spring piece with the distal end connected to the distal end of the rear adapter (512) and the proximal end upturned, the conversion balloon is bonded to the distal end of the front adapter (511), and the proximal end of the rear adapter (512) is bonded to the distal end of the push device.

2. The capsule adapter of claim 1, wherein The design material of the conversion device (5) is a hard polymer material, which is harder than the soft polymer material of the front end of the balloon adapter and softer than the metal material of the proximal end of the balloon adapter.

3. The capsule adapter of claim 1, wherein The conversion balloon comprises, from the distal end to the proximal end, a tip (1), an integrally formed balloon body (2), a distal rod (3), a quick exchange port (9), and a proximal rod (4).

4. The capsule adapter of claim 3, wherein the capsule adapter is configured to be coupled to the capsule by a snap fit. The tip (1), the distal rod (3), and the proximal rod (4) are all tubular, the distal rod (3) comprises a channel a and a channel b, the channel a is in communication with the inner cavity of the tip (1) at the distal end, the channel a is connected to the quick exchange port (9) at the proximal end, and the channel b is in communication with the inner cavity of the proximal rod (4) at the proximal end.

5. The capsule adapter of claim 1, wherein The assembly is tubular, the push device comprises, from the distal end to the proximal end, a transition section (6), a stress release section (7), and a catheter seat (8).

6. The capsule adapter of claim 3, wherein The integrally formed balloon body (2) is made by one-time blow molding, and the integrally formed balloon body (2) is one of a gourd-shaped balloon body, a chocolate balloon body, a papillary balloon body, a spinous process balloon body, and a microporous balloon body.

7. The capsule adapter of claim 3, wherein the capsule adapter is configured to be coupled to the capsule by a snap fit. The surface of the integrally formed balloon body (2) is additionally provided with a drug, and the drug is one of a cell inhibitor, a microtubule inhibitor, an immunosuppressant, an anti-inflammatory agent, an anti-inflammatory agent, an anticoagulant, a mitotic inhibitor, a thrombus formation inhibitor, a lipid-lowering agent, and an antioxidant.

8. The capsule adapter of claim 3, wherein, The integrally formed balloon body (2) is provided with a hole on the surface.

9. The capsule adapter of claim 4, wherein, The outer surface of the pipe wall where the channel a is located is provided with a developing ring, the developing ring is located at the position corresponding to the shoulder of the integrally formed balloon body (2), and the outer surface of the pipe wall where the channel a is located is provided with a coating.

10. The capsule adapter of claim 5, wherein, The transition section (6) is made of metal, the front end of the transition section (6) is designed in the shape of a metal wire, a metal spiral structure plus a metal wire, or a metal spiral structure plus a tubular metal bevel structure; the transition section (6) is made of a high polymer material, and the front end of the transition section (6) is in the shape of a woven structure, a double-cavity structure, or a multi-cavity structure.

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