Multi-cavity balloon catheter and multi-cavity balloon catheter system

Abstract

The utility model provides a multi-cavity balloon catheter and a multi-cavity balloon catheter system, and the multi-cavity balloon catheter comprises an outer tube which comprises a pressurizing cavity and at least one liquid injection cavity; the far end of the pressurizing cavity is not communicated with the outside; the outer pipe is provided with at least one liquid outlet and at least one liquid inlet, and the liquid injection cavity is communicated with the outside through the liquid outlet and the liquid inlet; the liquid inlet is close to the near end of the outer tube; the outer tube is sleeved with the balloon, and the two ends of the balloon are connected with the outer tube in a sealed mode; the balloon is communicated with the pressurizing cavity; when the balloon needs to be filled, the pressurizing connector part is connected with the near end of the outer tube in a sealed mode and communicated with the pressurizing cavity. The pressurizing device is used for pressurizing the balloon; the blocking part is configured to block the near end of the pressurizing cavity after the balloon is filled, so that the near end of the pressurizing cavity is not communicated with the outside; when liquid needs to be discharged from the liquid outlet, the liquid injection connector part is in sealed connection with the outer pipe and is communicated with the liquid injection cavity through the liquid inlet; the liquid injection device is used for injecting liquid into the liquid injection cavity. According to the technical scheme, the endoscope can be withdrawn from the balloon in the full state, and medicine injection can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of balloon catheters, in particular to a multi-lumen balloon catheter and a multi-lumen balloon catheter system. Background Art

[0002] In the existing technology, balloon dilatation catheters are currently widely used in the occlusion treatment of clinical bleeding and hemoptysis. The characteristic of completely blocking the bronchial cavity and resisting ventilation enables the product to block and stop bleeding in clinical use. However, these products enter through the endoscopic instrument cavity, and the endoscope cannot be withdrawn from the human body after the balloon is inflated, which makes it impossible to use the endoscope for subsequent surgical operations; or the balloon cannot maintain pressure when the endoscope is withdrawn from the human body, so it is necessary to first release the pressure to withdraw the endoscope and catheter, and then reinsert the catheter. Since the endoscope has been withdrawn, the catheter cannot accurately locate the desired area when it is reinserted, making it difficult to achieve occlusion, dilation or hemostasis of the desired area.

[0003] In addition, the existing balloon catheter can only ventilate but cannot inject liquid, and is not suitable for occasions where liquid injection is required for cleaning or anti-inflammatory treatment. Utility Model Content

[0004] The utility model provides a multi-lumen balloon catheter and a multi-lumen balloon catheter system to solve the problems in the prior art that an endoscope cannot be withdrawn after the balloon is filled, or the balloon cannot maintain continuous pressure when the endoscope is withdrawn, and liquid injection cannot be achieved.

[0005] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0006] According to the first aspect of the utility model, a multi-lumen balloon catheter is provided, which comprises: an outer tube and a balloon; wherein:

[0007] The outer tube is provided with: a pressure charging chamber and at least one liquid injection chamber;

[0008] The distal end of the pressure-charging chamber is not connected to the outside world;

[0009] The outer tube is provided with at least one liquid outlet and at least one liquid inlet, and the liquid injection cavity is connected with the outside through the liquid outlet and the liquid inlet; the liquid inlet is close to the proximal end of the outer tube, and the distance from the liquid outlet to the proximal end of the outer tube is greater than the distance from the liquid inlet to the proximal end of the outer tube;

[0010] The balloon is sleeved on the outer tube, and both ends of the balloon are sealed and connected to the outer tube respectively; the balloon is connected to the pressure chamber;

[0011] It also includes: a charging joint part, when the balloon needs to be inflated, the charging joint part is sealed and connected to the proximal end of the outer tube, and further communicated with the charging chamber; the charging joint part has a charging port, which is used to be connected to a charging device to charge the balloon;

[0012] A blocking portion, wherein the blocking portion is configured to block the proximal end of the inflation chamber after the balloon is fully inflated, so as to prevent the proximal end of the inflation chamber from being connected to the outside world;

[0013] The liquid injection joint part is sealed and connected with the outer tube when the liquid outlet needs to discharge liquid, and then communicated with the liquid injection cavity through the liquid inlet; the liquid injection joint part has a liquid injection port, which is used to be connected with the liquid injection device to inject liquid into the liquid injection cavity.

[0014] Optionally, the connection between the charging joint portion and the outer tube is a detachable connection.

[0015] Optionally, the charging joint portion includes: a first detachable joint, a valve;

[0016] When the balloon needs to be inflated, the distal end of the first detachable joint is sealably connected to the proximal end of the pressure-charging chamber, the proximal end of the first detachable joint is sealably connected to the first end of the valve, and the second end of the valve is the pressure-charging port;

[0017] The distal end of the first detachable joint is an end of the first detachable joint close to the distal end of the outer tube;

[0018] The first detachable joint is further configured to disconnect from the proximal end of the inflation chamber after the balloon is completely inflated.

[0019] Optionally, the connection between the liquid injection joint and the outer tube is a detachable connection.

[0020] Optionally, the injection joint portion includes: a second detachable joint;

[0021] The liquid injection port is arranged on the second detachable joint;

[0022] When the liquid outlet needs to discharge liquid, the second detachable joint can be sealed and connected to the corresponding position of the liquid inlet on the outer tube;

[0023] The second detachable joint is further configured to disconnect from the outer tube after the liquid outlet has finished discharging liquid.

[0024] Optionally, the injection joint portion further comprises: a tightening joint, the tightening joint being connected to the proximal end of the second detachable joint, the proximal end of the second detachable joint being an end of the second detachable joint away from the distal end of the outer tube;

[0025] The tightening joint is configured to be able to be sealed and connected to the distal end of the charging joint part, and the distal end of the charging joint part is an end of the charging joint part close to the distal end of the outer tube.

[0026] Optionally, the liquid injection joint part further includes: a sealing gasket; the sealing gasket is arranged in the second detachable joint;

[0027] When the second detachable joint is sealingly connected to the position corresponding to the liquid inlet on the outer tube, the sealing pad is located between the outer tube and the second detachable joint and on both sides of the liquid inlet.

[0028] Optionally, the blocking portion includes: a blocking piece and a third detachable joint;

[0029] The third detachable joint is sleeved on the distal end of the blocking member;

[0030] When the proximal end of the charging chamber needs to be blocked, the distal end of the third detachable joint is configured to be able to be sealed and connected to the charging port; the distal end of the third detachable joint is an end of the third detachable joint away from the proximal end of the blocking member;

[0031] The blocking member is configured to be able to move relative to the third detachable joint, to pass through the charging joint portion, and then to be inserted into the proximal end of the charging chamber to block the proximal end of the charging chamber.

[0032] Optionally, the number of the injection chambers is at least two: a first injection chamber and a second injection chamber; correspondingly, the number of the liquid outlets is at least two: a first liquid outlet and a second liquid outlet;

[0033] The first liquid injection cavity is connected to the outside through the first liquid outlet, and the second liquid injection cavity is connected to the outside through the second liquid outlet;

[0034] The first liquid outlet and the second liquid outlet are located at different end sides of the balloon.

[0035] Optionally, the outer diameter of the balloon in an uninflated state is equal to or smaller than the outer diameter of a portion of the outer tube;

[0036] The partial section of the outer tube is the portion of the outer tube that is not wrapped in the balloon.

[0037] Optionally, the outer tube includes: a first outer tube segment and a second outer tube segment; from the distal end to the proximal end of the outer tube, the first outer tube segment and the second outer tube segment are distributed in sequence;

[0038] The outer diameter of the second outer tube section is greater than the outer diameter of the first outer tube section;

[0039] The balloon is sleeved on the first outer tube segment.

[0040] Optionally, it further comprises: a tip catheter, the proximal end of the tip catheter is sealedly connected to the distal end of the outer tube, and the outer tube is in communication with the tip catheter;

[0041] The distal end of the tip catheter is a closed structure; the distal end of the tip catheter is an end of the tip catheter away from the distal end of the outer tube;

[0042] The tip catheter has a stiffness less than that of the outer tube.

[0043] Optionally, it further comprises: an inner core, the inner core is disposed in the outer tube, and the inner core passes through the portion of the outer tube wrapped in the balloon;

[0044] The distal end of the inner core extends into the tip catheter, and the distal end of the inner core is an end of the inner core away from the proximal end of the outer tube.

[0045] Optionally, the inner core is fixed to the outer tube, and the distance between the fixing point of the inner core and the outer tube and the distal end of the balloon is smaller than a preset range;

[0046] The distal end of the balloon is the connecting end of the balloon and the outer tube, and is the connecting end far away from the proximal end of the outer tube.

[0047] According to a second aspect of the present invention, a multi-lumen balloon catheter system is provided, comprising: a multi-lumen balloon catheter as described in any one of the above, a pressure-charging device, and a liquid-injecting device; wherein:

[0048] When the balloon needs to be inflated, the inflation device is connected to the inflation port of the inflation connector, and the inflation device is configured to be able to inflate the balloon;

[0049] When the liquid outlet needs to discharge liquid, the liquid injection device is communicated with the liquid injection port of the liquid injection joint portion, and the liquid injection device is configured to be able to inject liquid into the liquid injection cavity.

[0050] The multi-lumen balloon catheter and multi-lumen balloon catheter system provided by the utility model are characterized by arranging a pressure-charging chamber and a liquid injection chamber in an outer tube. The pressure-charging chamber can be used for ventilation to realize balloon pressurization, and the liquid injection chamber can be used for liquid passage to realize liquid discharge from a liquid outlet. In addition, after the balloon is filled, the proximal end of the pressure-charging chamber can be blocked by a blocking portion, so that the balloon can be kept in a filled state and the endoscope can be withdrawn.

[0051] Furthermore, in the multi-lumen balloon catheter and multi-lumen balloon catheter system provided by the utility model, the liquid inlet is arranged near the proximal end of the outer tube, that is, it is not located at the proximal end of the outer tube, but a distance away, and the proximal end of the charging chamber is located at the proximal end of the outer tube. Therefore, the liquid inlet and the proximal end of the charging chamber are not in the same position. When the sealing part is used to seal the charging chamber, it is not easy to make a sealing error (it is not easy to seal the liquid inlet).

[0052] Furthermore, in an optional solution of the utility model, the connection between the charging connector and the outer tube is configured to be detachable. After the sealing is completed, the charging connector can be detached, which can simplify the structure of the proximal end of the outer tube and realize the reuse of the charging connector.

[0053] Furthermore, in an optional solution of the utility model, the connection between the liquid injection joint part and the outer tube is configured to be detachable. After the liquid injection is completed, the liquid injection joint part can be detached, which can simplify the structure of the outer tube and realize the reuse of the liquid injection joint part.

[0054] Furthermore, in an optional scheme of the utility model, at least two injection chambers are provided, and correspondingly, at least two liquid outlets are provided. The two liquid outlets are located at both end sides of the balloon, so that liquid can be discharged at the front end of the balloon to stop bleeding and reduce inflammation at the site of action, and liquid can be discharged at the rear end of the balloon to clean the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0056] Figure 1 A schematic diagram of a multi-lumen balloon catheter according to an embodiment of the present invention;

[0057] Figure 2 A perspective view of a multi-lumen balloon catheter in a blocked state according to an embodiment of the utility model;

[0058] Figure 3a A schematic diagram of opening the valve of the pressure-charging joint portion of a multi-lumen balloon catheter in a preferred embodiment of the utility model;

[0059] Figure 3b A schematic diagram of closing the valve of the pressure-charging joint portion of a multi-lumen balloon catheter in a preferred embodiment of the utility model;

[0060] Figure 4aA schematic diagram of a liquid injection connector of a multi-lumen balloon catheter according to a preferred embodiment of the utility model;

[0061] Figure 4b An exploded view of the injection joint portion of a multi-lumen balloon catheter in a preferred embodiment of the utility model;

[0062] Figure 5 A schematic diagram of the blocking process of a multi-lumen balloon catheter according to a preferred embodiment of the utility model;

[0063] Figure 6a A schematic diagram of a blocking portion of a preferred embodiment of the utility model;

[0064] Figure 6b A schematic diagram of a blocking portion of a preferred embodiment of the utility model;

[0065] Figure 7 A schematic diagram of the detachment of a connector of a multi-lumen balloon catheter according to a preferred embodiment of the utility model;

[0066] Figure 8 A cross-sectional view of a multi-lumen balloon catheter according to a preferred embodiment of the utility model;

[0067] Fig. 9 A cross-sectional view of a multi-lumen balloon catheter according to another preferred embodiment of the present invention;

[0068] Description of reference numerals:

[0069] 1- Outer tube,

[0070] 101-pressure filling chamber,

[0071] 102-Injection chamber,

[0072] 1021-first injection chamber,

[0073] 1022- second injection chamber;

[0074] 103-liquid outlet,

[0075] 1031- first liquid outlet,

[0076] 1032- second liquid outlet;

[0077] 104-liquid inlet,

[0078] 1041- first liquid inlet,

[0079] 1042-second liquid inlet;

[0080] 105-through port;

[0081] 11- first outer tube section,

[0082] 12- second outer tube section;

[0083] 2-Balloon;

[0084] 3- Pressurized joint part,

[0085] 301-charging port,

[0086] 31- first detachable connector,

[0087] 32-valve;

[0088] 4- Liquid injection joint,

[0089] 401-Injection port;

[0090] 4011-First injection port,

[0091] 4012-second liquid injection port;

[0092] 41 - second detachable connector,

[0093] 411-swivel joint,

[0094] 412-locking cap;

[0095] 42-Tighten the joint,

[0096] 43- Sealing pad;

[0097] 5- Sealing part,

[0098] 51-blocking piece,

[0099] 511-blocking pin,

[0100] 512- mandrel;

[0101] 52- third detachable connector;

[0102] 6-tip catheter;

[0103] 7-Inner core. DETAILED DESCRIPTION

[0104] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0105] In the description of the utility model specification, it is necessary to understand that the orientation or position relationship indicated by the terms "upper part", "lower part", "upper end", "lower end", "lower surface", "upper surface", etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0106] In the description of the utility model specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0107] In the description of the present invention, "plurality" means multiple, such as two, three, four, etc., unless otherwise clearly and specifically defined.

[0108] In the description of the utility model specification, unless otherwise clearly specified and limited, the term "connection" and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0109] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0110] In one embodiment, a multi-lumen balloon catheter is provided, which includes: an outer tube 1, a balloon 2, please refer to Figure 1 , Figure 2 . Wherein, the catheter is a multi-cavity catheter, specifically, the outer tube 1 is provided with: a pressure charging chamber 101, and at least one liquid injection chamber 102. The distal end of the pressure charging chamber 101 is not connected to the outside world. The outer tube 1 is provided with at least one liquid outlet 103 and at least one liquid inlet 104, and the liquid injection chamber is connected to the outside world through the liquid outlet 103 and the liquid inlet 104. The liquid inlet 104 is close to the proximal end of the outer tube 1, that is, the opening of the liquid injection chamber is a distance away from the proximal end of the outer tube, and is not at the same position as the opening of the pressure charging chamber 101 (that is, the proximal end of the pressure charging chamber). The distance from the liquid outlet 103 to the proximal end of the outer tube is greater than the distance from the liquid inlet 104 to the proximal end of the outer tube, that is, in terms of the position in the figure, the liquid outlet 103 is located on the left side of the liquid inlet 104.

[0111] The balloon 2 is sleeved on the outer tube 1, and the two ends of the balloon 2 are sealed and connected to the outer tube 1 respectively; the balloon 2 is connected to the pressure chamber 101, please refer to Figure 1 .

[0112] Practically, the balloon 2 is connected to the inflation chamber 101 through a through opening 105 at the inflation chamber position on the outer tube.

[0113] The multi-lumen balloon catheter also includes: a pressure-charging connector 3, please refer to Figure 1 When the balloon needs to be inflated, the charging joint part 3 is sealed and connected to the proximal end of the outer tube, and then communicated with the charging chamber 101; the charging joint part 3 has a charging port 301, which is used to connect with the charging device to inflate the balloon.

[0114] The multi-lumen balloon catheter also includes a blocking portion 5, which is configured to block the proximal end of the inflation chamber after the balloon is filled so that it is not connected to the outside world. Figure 2 .

[0115] The multi-lumen balloon catheter also includes: an injection joint part 4, which is sealed and connected to the outer tube 1 when the liquid outlet needs to discharge liquid, and then communicates with the injection cavity through the liquid inlet; the injection joint part 4 has an injection port 401, which is used to be connected to the injection device to inject liquid into the injection cavity.

[0116] It should be noted that Figure 1 In the figure, the charging joint part 3 and the injection joint part 4 are installed at the same time as an example. In terms of the position in the figure, the injection joint part 4 is located on the left side of the charging joint part 3. In different embodiments, the charging joint part 3 and the injection joint part 4 may not be installed at the same time. When charging is required, the charging joint part 3 is installed, and when injection is required, the injection joint part 4 is installed.

[0117] In one embodiment, the connection between the charging connector part 3 and the outer tube 1 is a detachable connection. After the balloon is inflated, the charging connector part 3 can be detached from the outer tube 1, which can simplify the structure of the proximal end of the outer tube and facilitate operation, and the detached charging connector part 3 can be reused.

[0118] The charging connector 3 may include: a first detachable connector 31, a valve 32, see Figure 3a , 3b. When the balloon needs to be inflated, the distal end of the first detachable joint 31 can be sealably connected to the proximal end of the pressure-charging chamber. The distal end of the first detachable joint 31 is the end of the first detachable joint close to the distal end of the outer tube; the proximal end of the first detachable joint 31 is sealably connected to the first end of the valve 32, and the second end of the valve 32 is the pressure-charging port. When the valve 32 is opened, the pressure-charging chamber is connected to the outside world, and the balloon can be pressurized by the pressure-charging device; when the valve 32 is closed, the stamping chamber is not connected to the outside world. After the balloon is filled, the first detachable joint 31 can be disconnected from the proximal end of the pressure-charging chamber.

[0119] In one embodiment, the diameter of the through cavity of the valve 32 is smaller than the diameter of the outer tube, which further ensures the position limitation of the outer tube. When the valve is opened, the outer tube will not pass through the through cavity of the valve.

[0120] In one embodiment, the connection between the injection joint part 4 and the outer tube 1 is a detachable connection. When the injection is completed, the injection joint part 4 can be detached from the outer tube 1, which can simplify the structure of the outer tube and facilitate operation, and the detached injection joint part 3 can be reused.

[0121] The injection joint part may include: a second detachable joint 41, see Figure 4a The liquid injection port 401 is arranged on the second detachable joint 41. When the liquid outlet needs to discharge liquid, the second detachable joint 41 is configured to be able to be sealed and connected with the corresponding position of the liquid inlet on the outer tube. After the liquid outlet is finished discharging liquid, the second detachable joint 41 can be disconnected from the outer tube.

[0122] The second detachable joint may include: a rotary joint 411 and a locking cap 412. Figure 4b The locking cap 42 is sleeved on the distal end of the rotary joint 411, and the connection between the two can be a threaded connection. The distal end of the rotary joint 411 is the end of the rotary joint close to the distal end of the outer tube. The locking cap 412 is configured to lock the rotary joint 411 on the outer tube when the rotary joint is sealed and connected to the corresponding position of the liquid inlet on the outer tube. When the injection is completed, the locking cap 412 is loosened to remove the injection joint part 4 from the outer tube 1.

[0123] Practically, the rotary joint 411 can be a three-way hollow ring, two of which are axially arranged for sleeved on the outer tube, and the other one is arranged on the side to serve as the liquid injection port 401.

[0124] In one embodiment, the liquid injection joint part 4 and the pressure charging joint part 3 can be connected together and can be removed together.

[0125] The injection joint part may further include: a tightening joint 42, the tightening joint 42 is connected to the proximal end of the rotary joint 411, and the proximal end of the rotary joint is the end of the rotary joint away from the distal end of the outer tube, please refer to Figure 4b ; The connection between the two can be threaded, please refer to Figure 4b The screw-on connector is configured to seal with the distal end of the pressurized connector, see Figure 1 , the far end of the pressure-charging joint part is an end of the far end of the pressure-charging joint part near the outer tube. By tightening the joint 43, the injection joint part 4 is connected with the pressure-charging joint part 3, and can be removed together.

[0126] Figure 1 In the example, the liquid injection joint part 4 is connected with the charging joint part 3. In different embodiments, the liquid injection joint part 4 and the charging joint part 3 can also be sealed or detachably connected with the outer tube respectively.

[0127] In one embodiment, the liquid injection joint part 4 also includes: a sealing gasket 43; the sealing gasket 43 is arranged in the rotary joint; when the rotary joint is sleeved on the outer tube, and when the sleeve is sleeved at a position corresponding to the liquid inlet, the sealing gasket is located between the outer tube and the rotary joint, and is located on both sides of the liquid inlet, which can enhance the sealing between the rotary joint 41 and the outer tube 1, and the liquid injected from the liquid injection port 401 will not leak from the two ends of the second detachable joint 41.

[0128] As an implementation mode, the blocking portion 5 can be implemented by physical replacement. Practically, the blocking portion includes: a blocking piece. When the proximal end of the pressurizing chamber needs to be blocked, the blocking piece is pushed into the proximal end of the pressurizing chamber to block it.

[0129] As another embodiment, the sealing part can also be made of liquid solidification. Practically, the sealing part includes: a curable liquid; the curable liquid is configured to be able to solidify under preset conditions, and after solidification, it is sealed and connected to the inner wall of the pressure chamber to seal the proximal end of the outer tube. For example, the curable liquid can be made of UV glue, which can be solidified under light conditions. The curable liquid can be injected into the proximal end of the pressure chamber through the pressure joint part. Practically, the valve 32 also includes a third end (the valve is a three-way valve in this case), and the third end of the valve is used to inject the curable liquid. When the proximal end of the pressure chamber needs to be blocked, the curable liquid can enter from the third end of the valve, and pass through the valve 32 and the first detachable joint 31 in turn to enter the proximal end of the pressure chamber 101.

[0130] As another embodiment, the sealing portion can also adopt a melting heat shrinking method. Practically, the sealing portion includes: a high temperature resistant solid part, which is arranged in the pressure chamber and located at the proximal end of the pressure chamber. The high temperature resistant solid part can be made of PEEK, PI, etc. When the proximal end of the pressure chamber needs to be blocked, a section of the pressure chamber provided with the high temperature resistant solid part is configured to be able to shrink under preset high temperature conditions, and the inner wall of the pressure chamber after shrinkage is wrapped around the surface of the high temperature resistant solid part and is sealed with the high temperature resistant solid to block the proximal end of the pressure chamber. The section of the pressure chamber provided with the high temperature resistant solid part can be a heat-shrinkable material such as FEP or PET, or the entire pressure chamber can be made of heat-shrinkable materials, because only the section provided with the high temperature resistant solid part is heated, so only this part shrinks when heated.

[0131] In one embodiment, the blocking portion may also be implanted with a one-way valve. Practically, the blocking portion includes: a one-way valve, which is disposed at the proximal end of the pressure chamber. The one-way valve is configured to allow pressurized gas or liquid outside the outer tube to flow in, so that the gas or liquid can pressurize the balloon through the one-way valve, and after the pressure is stopped, the gas or liquid cannot flow back due to the one-way flow to form a closed space.

[0132] In one embodiment, when the blocking portion 5 adopts a blocking piece 51, the blocking portion also includes: a third detachable joint 52. The third detachable joint 52 is sleeved on the distal end of the blocking piece 51; when the proximal end of the pressure chamber needs to be blocked, the distal end of the third detachable joint 52 is configured to be able to be sealed and connected to the pressure port 301; the distal end of the third detachable joint is the end of the third detachable joint away from the proximal end of the blocking piece. The blocking piece 51 is configured to be able to move relative to the third detachable joint 52, and can pass through the second end, the first end, and the first detachable joint of the valve in sequence, and then be inserted into the proximal end of the pressure chamber to block the proximal end of the pressure chamber, please refer to Figure 5 .

[0133] Further, in one embodiment, the blocking member 51 can be a structure assembled from two parts: a blocking pin 511 and a core rod 512. Figure 6a After the plugging is completed, the core rod 512 can be disconnected from the plugging pin 511, leaving only the relatively short plugging pin 511. Please refer to Figure 6b, which can shorten the length of the proximal end of the outer tube and facilitate operation. Apply a certain thrust to the core rod so that it pushes the blocking pin and moves relative to the third detachable joint, passing through the second end, the first end, and the first detachable joint of the valve in sequence, and then partially inserting into the proximal end of the pressure chamber, forming a tight fit with the pressure chamber to complete the blocking. At this time, the first detachable joint and the third detachable joint are both on the core rod. Next, continue to push the core rod to move relative to the third detachable joint, so that the first detachable joint can also be on the core rod. Disconnect the connection between the core rod and the blocking pin, then the third detachable joint 52, the pressure joint part 3, and the injection joint part 4 are all on the core rod, that is, the removal of the pressure joint part 3 and the injection joint part 4 from the outer tube is completed, please refer to Figure 7 Then the third detachable joint 52, the charging joint part 3 and the liquid injection joint part 4 can be detached from the mandrel.

[0134] In one embodiment, the third detachable joint 52 can be in the form of a compressible hollow ring and a locking cap, and the locking cap is sleeved on the hollow ring; when the detachable joint is connected to the outer tube, the hollow ring is sleeved on the outer tube, and by tightening the locking cap, the hollow ring and the outer tube are compressed and tightly attached, so that the detachable joint and the outer tube are tightly connected. After the locking cap is loosened, the detachable joint can be detached.

[0135] In one embodiment, when the charging joint part is connected to the liquid injection joint part, since the liquid injection joint part has already achieved detachable fastening with the outer tube, the charging joint part only needs to be connected to the liquid injection joint part, and no detachable fastening with the outer tube is required. In different embodiments, when the charging joint part is not connected to the liquid injection joint part, the charging joint part needs to be detachably fastened with the outer tube separately, that is, it includes: a first detachable joint 31, which can also be in the form of a compressible hollow ring and a locking cap, and the locking cap is sleeved on the hollow ring, which is similar to the principle of the third detachable joint 52, and will not be repeated here.

[0136] In one embodiment, please refer to Figure 8 , the number of the injection chambers 102 is at least two: a first injection chamber 1021 and a second injection chamber 1022; correspondingly, the number of the liquid outlets 103 is at least two: a first liquid outlet 1031 and a second liquid outlet 1032; the first injection chamber 1021 is connected to the outside world through the first liquid outlet 1031, and the second injection chamber 1022 is connected to the outside world through the second liquid outlet 1032. At least two injection chambers are provided, so that there can be at least two locations of the liquid outlets, and different injection requirements of different parts can be met.

[0137] In practice, the first liquid outlet 1031 and the second liquid outlet 1032 are located at different ends of the balloon. Figure 8After the balloon is filled, the area is blocked or expanded, and it is difficult for the liquid on both sides of the balloon to circulate. Therefore, the different injection requirements of different parts on both sides of the balloon can be met by setting the liquid outlets on both sides of the balloon. The part at the front end of the balloon may need to be injected for hemostasis and anti-inflammation, and the part at the rear end of the balloon may need to be injected for cavity cleaning.

[0138] As an embodiment, the first liquid inlet 1041 and the second liquid inlet 1042 corresponding to the first liquid injection cavity 1021 and the second liquid injection cavity 1022 may be located at the same position in the axial direction of the outer tube, please refer to Figure 8 At this time, the injection of the two liquid inlets can be achieved through the same injection joint part, and two injection ports can be set on the same injection joint part to connect the two liquid inlets respectively, so as to achieve the injection of the two injection cavities respectively.

[0139] As another embodiment, the positions of the first liquid inlet 1041 and the second liquid inlet 1042 corresponding to the first liquid injection cavity 1021 and the second liquid injection cavity 1022 in the axial direction of the outer tube can be staggered. Fig. 9 At this time, the injection of the two liquid inlets can be achieved through different injection joints, and two injection joints can be used. The corresponding injection ports also include two: a first injection port 4011 and a second injection port 4022. The two injection joints can be connected to each other and can be removed together.

[0140] In one embodiment, in order to facilitate the arrangement of the two liquid inlets, the two injection chambers can be located on opposite sides of the outer tube, and the corresponding liquid inlets are also located on opposite sides of the outer tube. Figure 8 , Fig. 9 .

[0141] In one embodiment, the outer diameter of the balloon in an uninflated state is equal to or smaller than the outer diameter of a portion of the outer tube; the portion of the outer tube is the portion of the outer tube that is not wrapped in the balloon. In this way, after the balloon is sheathed, the size of the catheter can be kept unchanged or made thinner, so that the catheter will not be more difficult to pass through the instrument cavity.

[0142] In one embodiment, in order to prevent the diameter of the entire catheter from increasing after the balloon is assembled, the outer tube includes: a first outer tube segment 11 and a second outer tube segment 12; the first outer tube segment 11 and the second outer tube segment 12 are arranged in sequence from the distal end to the proximal end of the outer tube. The outer diameter of the second outer tube segment 12 is greater than the outer diameter of the first outer tube segment 11; the balloon is sheathed on the first outer tube segment with a relatively small outer diameter, please refer to Figure 2 .

[0143] In one embodiment, the multi-lumen balloon catheter further comprises: a tip catheter 6, the proximal end of the tip catheter 6 is sealedly connected to the distal end of the outer tube, and the outer tube is connected to the tip catheter; the distal end of the tip catheter is a closed structure; the distal end of the tip catheter is an end of the tip catheter away from the distal end of the outer tube, please refer to Figure 1 The hardness of the tip of the catheter is less than that of the outer tube, which can ensure the softness of the catheter tip and reduce the damage to the inner wall of the mucosa when the catheter passes through.

[0144] In one embodiment, it further comprises: an inner core 7, which is disposed in the outer tube 1 and passes through the portion of the outer tube wrapped in the balloon. Figure 1 The distal end of the inner core 7 extends into the tip catheter 6, and the distal end of the inner core is the end of the inner core away from the proximal end of the outer tube. The setting of the inner core can ensure the support of the front end of the catheter and prevent the catheter from being damaged when entering and exiting.

[0145] Furthermore, the inner core 7 can be fixed to the outer tube 1, and the distance between the fixing point of the inner core 8 and the outer tube 1 and the distal end of the balloon can be set to be less than a preset range, that is, the inner core is located near the distal end of the balloon; the distal end of the balloon is the connecting end of the balloon and the outer tube, and is the connecting end far away from the proximal end of the outer tube. This arrangement can better ensure the support of the front end of the catheter.

[0146] In one embodiment, the balloon is configured to be able to be inflated and expanded to multiple diameters. For example, in a non-expanded state, the balloon diameter is less than 3 mm, and after the balloon is inflated and expanded, the diameter can reach 4 to 30 mm.

[0147] In one embodiment, a developing ring 8 is further disposed in the outer tube 1. The developing ring can be disposed near the balloon, for example, it can be disposed at both ends of the balloon. Figure 1 .

[0148] In one embodiment, a multi-lumen balloon catheter system is provided, which includes: a multi-lumen balloon catheter according to any of the above embodiments, a pressure-charging device, and a liquid-injection device. When the balloon needs to be inflated, the pressure-charging device is connected to the pressure-charging port, and the pressure-charging device is configured to be able to inflate the balloon; when the liquid outlet needs to discharge liquid, the liquid-injection device is connected to the liquid-injection port, and the liquid-injection device is configured to be able to inject liquid into the liquid-injection cavity, and then discharge liquid from the liquid outlet.

[0149] In the description of this specification, the description with reference to the terms "an implementation", "an example", "a specific implementation process", "an example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A multi-lumen balloon catheter, characterized in that: include: Outer tube, balloon; wherein, The outer tube is provided with: a pressure charging chamber and at least one liquid injection chamber; The distal end of the pressure-charging chamber is not connected to the outside world; The outer tube is provided with at least one liquid outlet and at least one liquid inlet, and the liquid injection cavity is connected with the outside through the liquid outlet and the liquid inlet; the liquid inlet is close to the proximal end of the outer tube, and the distance from the liquid outlet to the proximal end of the outer tube is greater than the distance from the liquid inlet to the proximal end of the outer tube; The balloon is sleeved on the outer tube, and both ends of the balloon are sealed and connected to the outer tube respectively; the balloon is connected to the pressure chamber; It also includes: a charging joint part, when the balloon needs to be inflated, the charging joint part is sealed and connected to the proximal end of the outer tube, and further communicated with the charging chamber; the charging joint part has a charging port, which is used to be connected to a charging device to charge the balloon; A blocking portion, wherein the blocking portion is configured to block the proximal end of the inflation chamber after the balloon is fully inflated, so as to prevent the proximal end of the inflation chamber from being connected to the outside world; The liquid injection joint part is sealed and connected with the outer tube when the liquid outlet needs to discharge liquid, and then communicated with the liquid injection cavity through the liquid inlet; the liquid injection joint part has a liquid injection port, which is used to be connected with the liquid injection device to inject liquid into the liquid injection cavity.

2. The multi-lumen balloon catheter according to claim 1, characterized in that: The connection between the charging joint portion and the outer tube is a detachable connection.

3. The multi-lumen balloon catheter according to claim 2, characterized in that: The pressure charging joint part includes: a first detachable joint and a valve; When the balloon needs to be inflated, the distal end of the first detachable joint is sealably connected to the proximal end of the pressure-charging chamber, the proximal end of the first detachable joint is sealably connected to the first end of the valve, and the second end of the valve is the pressure-charging port; The distal end of the first detachable joint is an end of the first detachable joint close to the distal end of the outer tube; The first detachable joint is further configured to disconnect from the proximal end of the inflation chamber after the balloon is completely inflated.

4. The multi-lumen balloon catheter according to claim 2, characterized in that: The connection between the liquid injection joint part and the outer tube is a detachable connection.

5. The multi-lumen balloon catheter according to claim 4, characterized in that: The liquid injection joint portion includes: a second detachable joint; The liquid injection port is arranged on the second detachable joint; When the liquid outlet needs to discharge liquid, the second detachable joint can be sealed and connected to the corresponding position of the liquid inlet on the outer tube; The second detachable joint is further configured to disconnect from the outer tube after the liquid outlet has finished discharging liquid.

6. The multi-lumen balloon catheter according to claim 5, characterized in that: The injection joint part further includes: a tightening joint, the tightening joint is connected to the proximal end of the second detachable joint, the proximal end of the second detachable joint is an end of the second detachable joint away from the distal end of the outer tube; The tightening joint is configured to be able to be sealed and connected to the distal end of the charging joint part, and the distal end of the charging joint part is an end of the charging joint part close to the distal end of the outer tube.

7. The multi-lumen balloon catheter according to claim 5, characterized in that: The liquid injection joint part further includes: a sealing pad; the sealing pad is arranged in the second detachable joint; When the second detachable joint is sealingly connected to the position corresponding to the liquid inlet on the outer tube, the sealing pad is located between the outer tube and the second detachable joint and on both sides of the liquid inlet.

8. The multi-lumen balloon catheter according to any one of claims 2 to 7, characterized in that: The blocking portion includes: a blocking piece and a third detachable joint; The third detachable joint is sleeved on the distal end of the blocking member; When the proximal end of the charging chamber needs to be blocked, the distal end of the third detachable joint is configured to be able to be sealed and connected to the charging port; the distal end of the third detachable joint is an end of the third detachable joint away from the proximal end of the blocking member; The blocking member is configured to be able to move relative to the third detachable joint, to pass through the charging joint portion, and then to be inserted into the proximal end of the charging chamber to block the proximal end of the charging chamber.

9. The multi-lumen balloon catheter according to claim 1, characterized in that: The number of the injection chambers is at least two: a first injection chamber and a second injection chamber; correspondingly, the number of the liquid outlets is at least two: a first liquid outlet and a second liquid outlet; The first liquid injection cavity is connected to the outside through the first liquid outlet, and the second liquid injection cavity is connected to the outside through the second liquid outlet; The first liquid outlet and the second liquid outlet are located at different end sides of the balloon.

10. The multi-lumen balloon catheter according to claim 1, characterized in that: The outer diameter of the balloon in an uninflated state is equal to or smaller than the outer diameter of a portion of the outer tube; The partial section of the outer tube is the portion of the outer tube that is not wrapped in the balloon.

11. The multi-lumen balloon catheter according to claim 1, characterized in that: The outer tube comprises: a first outer tube segment and a second outer tube segment; from the distal end to the proximal end of the outer tube, the first outer tube segment and the second outer tube segment are distributed in sequence; The outer diameter of the second outer tube section is greater than the outer diameter of the first outer tube section; The balloon is sleeved on the first outer tube segment.

12. The multi-lumen balloon catheter according to claim 1, characterized in that: Also includes: A tip catheter, the proximal end of which is sealedly connected to the distal end of the outer tube, and the outer tube is in communication with the tip catheter; The distal end of the tip catheter is a closed structure; the distal end of the tip catheter is an end of the tip catheter away from the distal end of the outer tube; The tip catheter has a stiffness less than that of the outer tube.

13. The multi-lumen balloon catheter according to claim 12, characterized in that: Also includes: An inner core, the inner core is disposed in the outer tube, and the inner core passes through the portion of the outer tube wrapped in the balloon; The distal end of the inner core extends into the tip catheter, and the distal end of the inner core is an end of the inner core away from the proximal end of the outer tube.

14. The multi-lumen balloon catheter according to claim 13, characterized in that: The inner core is fixed to the outer tube, and the distance between the fixing point of the inner core and the outer tube and the distal end of the balloon is smaller than a preset range; The distal end of the balloon is the connecting end of the balloon and the outer tube, and is the connecting end far away from the proximal end of the outer tube.

15. A multi-lumen balloon catheter system, characterized in that: include: The multi-lumen balloon catheter, the charging device, and the injection device according to any one of claims 1 to 14; wherein: When the balloon needs to be inflated, the charging device is connected to the charging port of the charging connector, and the charging device is configured to be able to inflate the balloon; When the liquid outlet needs to discharge liquid, the liquid injection device is communicated with the liquid injection port of the liquid injection joint portion, and the liquid injection device is configured to be able to inject liquid into the liquid injection cavity.

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