Multi-cavity balloon catheter and system

Abstract

A multi-cavity balloon catheter and system. The multi-cavity balloon catheter comprises: an outer tube (1), wherein the outer tube (1) comprises a pressurizing cavity (101) and at least one liquid injection cavity (102); the far end of the pressurizing cavity (101) is not in communication with the outside; the outer tube (1) is provided with at least one liquid outlet (103) and at least one liquid inlet (104), and the liquid injection cavity (102) is in communication with the outside by means of the liquid outlet (103) and the liquid inlet (104); the liquid inlet (104) is close to the near end of the outer tube (1); a balloon (2) sleeving the outer tube (1), wherein two ends of the balloon is in sealed connection with the outer tube (1); the balloon (2) is in communication with the pressurizing cavity (101); a pressurizing joint part (3), wherein when the balloon (2) needs to be filled, the pressurizing joint part (3) is in sealed connection with the near end of the outer tube (1) and then in communication with the pressurizing cavity (101), for pressurizing the balloon (2); a blocking part (5) configured for, after the balloon (2) is filled, blocking the near end of the pressurizing cavity (101) such that the pressurizing cavity is not in communication with the outside; and a liquid injection joint part (4), wherein when the liquid outlet (103) needs to discharge liquid, the liquid injection joint part (4) is in sealed connection with the outer tube (1) and, by means of the liquid inlet (104), in communication with the liquid injection cavity (102), for injecting liquid into the liquid injection cavity (102). Thus, the balloon (2), when in a filled state, can be withdrawn from an endoscope, and medicine injection can also be achieved.

Description

Multi-lumen balloon catheters and systems Technical Field

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

[0002] In the existing technology, balloon dilatation catheters are currently widely used in the occlusion treatment of clinical bleeding and hemoptysis. Their ability to completely block the bronchial cavity and resist ventilation allows them to block and stop bleeding in clinical use. However, these products enter through the endoscopic instrument cavity. After the balloon is inflated, the endoscope cannot be withdrawn from the human body, making it impossible to use the endoscope for subsequent surgical operations; or the balloon cannot maintain continuous pressure when the endoscope is withdrawn from the human body, forcing the endoscope and catheter to be released first and then reinserted. 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 situations where liquid injection is required for cleaning or anti-inflammatory purposes.

[0004] Summary of the Invention

[0005] The present invention provides a multi-lumen balloon catheter and system to solve the problems in the prior art that an endoscope cannot be withdrawn after the balloon is inflated, or the balloon cannot maintain continuous pressure when the endoscope is withdrawn, and liquid injection cannot be achieved.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] According to a first aspect of the present invention, a multi-lumen balloon catheter is provided, comprising: an outer tube and a balloon; wherein:

[0008] The outer tube is provided with: a pressure charging chamber and at least one liquid injection chamber;

[0009] The distal end of the pressure-filling chamber is not connected to the outside world;

[0010] The outer tube is provided with at least one liquid outlet and at least one liquid inlet, and the liquid injection cavity is connected to 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;

[0011] The balloon is sheathed on the outer tube, and both ends of the balloon are sealed and connected to the outer tube respectively; the balloon is in communication with the inflation chamber;

[0012] The device further comprises: a pressure-charging connector portion, which is sealedly connected to the proximal end of the outer tube and further communicates with the pressure-charging chamber when the balloon needs to be inflated; the pressure-charging connector portion has a pressure-charging port for connecting to a pressure-charging device to inflate the balloon;

[0013] a blocking portion configured to block the proximal end of the inflation chamber after the balloon is fully inflated, so as to prevent the proximal end from communicating with the outside world;

[0014] The liquid injection joint part is sealed and connected to the outer tube when the liquid outlet needs to discharge liquid, and is then connected to the liquid injection cavity through the liquid inlet; the liquid injection joint part has a liquid injection port, which is used to be connected to the liquid injection device to inject liquid into the liquid injection cavity.

[0015] Optionally, the connection between the charging joint portion and the outer tube is a detachable connection.

[0016] Optionally, the pressure charging connector portion includes: a first detachable connector and a valve;

[0017] When the balloon needs to be inflated, the distal end of the first detachable joint is sealably connected to the proximal end of the inflation 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 inflation port;

[0018] 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;

[0019] The first detachable joint is further configured to disconnect from the proximal end of the inflation chamber after the balloon is fully inflated.

[0020] Optionally, the connection between the liquid injection joint and the outer tube is a detachable connection.

[0021] Optionally, the liquid injection joint portion includes: a second detachable joint;

[0022] The liquid injection port is provided on the second detachable joint;

[0023] 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;

[0024] The second detachable joint is further configured to disconnect from the outer tube after the liquid outlet has finished discharging liquid.

[0025] 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;

[0026] 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.

[0027] Optionally, the liquid injection joint further comprises: a sealing gasket; the sealing gasket is arranged in the second detachable joint;

[0028] When the second detachable joint is sealed and connected to the position corresponding to the liquid inlet on the outer tube, the sealing gasket is located between the outer tube and the second detachable joint and on both sides of the liquid inlet.

[0029] Optionally, the blocking portion includes: a blocking piece, a third detachable joint;

[0030] The third detachable joint is sleeved on the distal end of the blocking member;

[0031] When the proximal end of the pressure 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 pressure port; the distal end of the third detachable joint is the end of the third detachable joint away from the proximal end of the blocking member;

[0032] The blocking member is configured to be able to move relative to the third detachable joint, pass through the inflation joint portion, and then be inserted into the proximal end of the inflation chamber to block the proximal end of the inflation chamber.

[0033] Optionally, the number of the liquid injection chambers is at least two: a first liquid injection chamber and a second liquid injection chamber; correspondingly, the number of the liquid outlets is at least two: a first liquid outlet and a second liquid outlet;

[0034] 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;

[0035] The first liquid outlet and the second liquid outlet are located at different end sides of the balloon.

[0036] 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;

[0037] The partial section of the outer tube is the portion of the outer tube that is not wrapped in the balloon.

[0038] Optionally, the outer tube includes: a first outer tube segment and a second outer tube segment; the first outer tube segment and the second outer tube segment are distributed in sequence from the distal end to the proximal end of the outer tube;

[0039] The outer diameter of the second outer tube section is greater than the outer diameter of the first outer tube section;

[0040] The balloon is sheathed on the first outer tube segment.

[0041] Optionally, the invention further comprises: a tip catheter, wherein 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;

[0042] 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;

[0043] The tip catheter has a hardness less than that of the outer tube.

[0044] Optionally, it further comprises: an inner core, the inner core being disposed in the outer tube and penetrating the portion of the outer tube wrapped in the balloon;

[0045] 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.

[0046] 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;

[0047] The distal end of the balloon is the connecting end between the balloon and the outer tube, and is the connecting end away from the proximal end of the outer tube.

[0048] 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-inflating device, and a liquid-injecting device; wherein,

[0049] 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 inflate the balloon;

[0050] 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.

[0051] The multi-lumen balloon catheter and system provided by the present invention 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 pressure charging, and the liquid injection chamber can be used for liquid flow to realize liquid discharge from the liquid outlet. In addition, after the balloon is filled, the proximal end of the pressure-charging chamber can be blocked by the blocking portion, so that the balloon can be kept in a filled state and the endoscope can be withdrawn.

[0052] Furthermore, in the multi-lumen balloon catheter and system provided by the present invention, 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 at a distance away. 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).

[0053] Furthermore, in an optional solution of the present invention, 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 enable the charging connector to be reused.

[0054] Furthermore, in an optional solution of the present invention, the connection between the liquid injection joint and the outer tube is set to be detachable. After the liquid injection is completed, the liquid injection joint can be detached, which can simplify the structure of the outer tube and realize the reuse of the liquid injection joint.

[0055] Furthermore, in an optional solution of the present invention, at least two injection chambers are provided, and correspondingly, at least two liquid outlets are provided. The two liquid outlets are located at both ends 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 also be discharged at the rear end of the balloon to clean the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0057] FIG1 is a schematic diagram of a multi-lumen balloon catheter according to an embodiment of the present invention;

[0058] FIG2 is a perspective view of a multi-lumen balloon catheter in a blocked state according to an embodiment of the present invention;

[0059] FIG3a is a schematic diagram showing the opening of the valve of the inflation connector of a multi-lumen balloon catheter according to a preferred embodiment of the present invention;

[0060] FIG3 b is a schematic diagram showing the closing of the valve of the inflation connector portion of the multi-lumen balloon catheter according to a preferred embodiment of the present invention;

[0061] FIG4 a is a schematic diagram of an injection connector portion of a multi-lumen balloon catheter according to a preferred embodiment of the present invention;

[0062] FIG4 b is an exploded view of the injection connector of a multi-lumen balloon catheter according to a preferred embodiment of the present invention;

[0063] FIG5 is a schematic diagram of the occlusion process of a multi-lumen balloon catheter according to a preferred embodiment of the present invention;

[0064] FIG6 a is a schematic diagram of a blocking portion according to a preferred embodiment of the present invention;

[0065] FIG6 b is a schematic diagram of a blocking portion according to a preferred embodiment of the present invention;

[0066] FIG7 is a schematic diagram of a detachable connector of a multi-lumen balloon catheter according to a preferred embodiment of the present invention;

[0067] FIG8 is a cross-sectional view of a multi-lumen balloon catheter according to a preferred embodiment of the present invention;

[0068] FIG9 is a cross-sectional view of a multi-lumen balloon catheter according to another preferred embodiment of the present invention;

[0069] Explanation of the accompanying symbols: 1-outer tube, 101-charging chamber, 102-liquid injection chamber, 1021-first liquid injection chamber, 1022-second liquid injection chamber; 103-liquid outlet, 1031-first liquid outlet, 1032-second liquid outlet; 104-liquid inlet, 1041-first liquid inlet, 1042-second liquid inlet; 105-opening; 11-first outer tube segment, 12-second outer tube segment; 2-balloon; 3-charging connector, 301-charging port, 31-first detachable connector, 32-valve; 4-liquid injection connector, 401-liquid injection port; 4011-first liquid injection port, 4012-second liquid injection port; 41-second detachable connector, 411-swivel connector, 412-locking cap; 42-tightening joint, 43-sealing gasket; 5-sealing portion, 51-sealing member, 511-sealing pin, 512-core rod; 52-third detachable joint; 6-tip catheter; 7-inner core. DETAILED DESCRIPTION

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0071] In the description of the specification of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper part", "lower part", "upper end", "lower end", "lower surface", "upper surface", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 present invention.

[0072] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features.

[0073] In the description of the present invention, "plurality" means multiple, such as two, three, four, etc., unless otherwise clearly defined.

[0074] In the description of the present invention, unless otherwise specified or limited, the term "connection" and other terms should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integration; it can mean mechanical connection, electrical connection, or mutual communication; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] The following specific embodiments are used to describe the technical solution of the present invention 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.

[0076] In one embodiment, a multi-lumen balloon catheter is provided, which includes: an outer tube 1, a balloon 2, please refer to Figures 1 and 2. The catheter is a multi-lumen catheter, specifically, the outer tube 1 is provided with: a pressure chamber 101, and at least one liquid injection chamber 102. The distal end of the pressure 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 chamber 101 (that is, the proximal end of the pressure 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 to the left of the liquid inlet 104.

[0077] The balloon 2 is sleeved on the outer tube 1 , and both ends of the balloon 2 are sealedly connected to the outer tube 1 ; the balloon 2 is connected to the inflation chamber 101 , please refer to FIG1 .

[0078] Practically, the balloon 2 is connected to the inflation chamber 101 through the opening 105 at the inflation chamber position on the outer tube.

[0079] The multi-lumen balloon catheter also includes: a charging connector 3, please refer to Figure 1. When the balloon needs to be inflated, the charging connector 3 is sealed and connected to the proximal end of the outer tube, and then connected to the charging chamber 101; the charging connector 3 has a charging port 301, which is used to connect to the charging device to inflate the balloon.

[0080] The multi-lumen balloon catheter further includes a blocking portion 5 , which is configured to block the proximal end of the inflation cavity after the balloon is fully inflated, so as to prevent it from communicating with the outside world. Please refer to FIG2 .

[0081] The multi-lumen balloon catheter also includes: an injection joint part 4. When the liquid outlet needs to discharge liquid, the injection joint part 4 is sealed and connected to the outer tube 1, and then connected to 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.

[0082] It should be noted that in Figure 1, the charging connector 3 and the liquid injection connector 4 are installed simultaneously as an example. In terms of the position shown in the figure, the liquid injection connector 4 is located to the left of the charging connector 3. In different embodiments, the charging connector 3 and the liquid injection connector 4 can also be installed at different times. When charging is required, the charging connector 3 is installed, and when liquid injection is required, the liquid injection connector 4 is installed.

[0083] 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. In addition, the detached charging connector part 3 can be reused.

[0084] Practically, the charging joint part 3 includes: a first detachable joint 31 and a valve 32, please refer to Figures 3a and 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 charging chamber, and 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 charging port. When the valve 32 is open, the charging chamber is connected to the outside world, and the balloon can be pressurized by the 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 charging chamber.

[0085] 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 of the outer tube. When the valve is opened, the outer tube will not pass through the through cavity of the valve.

[0086] In one embodiment, the connection between the liquid injection joint part 4 and the outer tube 1 is a detachable connection. When the liquid injection is completed, the liquid 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 liquid injection joint part 3 can be reused.

[0087] The liquid injection connector portion may include a second detachable connector 41 (see Figure 4a). A liquid injection port 401 is provided on the second detachable connector 41. When the liquid outlet is in need of discharging liquid, the second detachable connector 41 is configured to sealably connect with a corresponding position of the liquid inlet on the outer tube. After the liquid outlet is discharged, the second detachable connector 41 can be disconnected from the outer tube.

[0088] The second detachable joint can be implemented by including a rotary joint 411 and a locking cap 412. (See Figure 4b.) The locking cap 42 is fitted over the distal end of the rotary joint 411, and the connection between the two can be threaded. The distal end of the rotary joint 411 is the end of the rotary joint that is closest to the distal end of the outer tube. The locking cap 412 is configured to lock the rotary joint 411 to the outer tube when the rotary joint is sealingly connected to the corresponding position of the liquid inlet on the outer tube. Once the liquid injection is complete, the locking cap 412 is loosened to remove the liquid injection joint portion 4 from the outer tube 1.

[0089] 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.

[0090] In one embodiment, the liquid injection connector 4 and the pressure charging connector 3 can be connected together and can be removed together.

[0091] The injection connector portion may further include a screw-on connector 42 connected to the proximal end of the screw-on connector 411 (the proximal end of the screw-on connector is the end of the screw-on connector away from the distal end of the outer tube, see Figure 4b ). The screw-on connector 42 may be threaded, see Figure 4b . The screw-on connector is configured to sealably connect with the distal end of the charging connector portion (see Figure 1 ), the distal end of the charging connector portion being the end adjacent to the distal end of the outer tube. The screw-on connector 43 connects the injection connector portion 4 and the charging connector portion 3 together, allowing for simultaneous removal.

[0092] In the example of Figure 1, the liquid injection joint part 4 is connected to the pressure charging joint part 3. In different embodiments, the liquid injection joint part 4 and the pressure charging joint part 3 can also be sealed or detachably connected to the outer tube respectively.

[0093] In one embodiment, the liquid injection joint portion 4 further 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 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.

[0094] As an implementation method, the blocking portion 5 can be physically replaced. Practically, the blocking portion includes: a blocking piece. When the proximal end of the pressurized cavity needs to be blocked, the blocking piece is pushed into the proximal end of the pressurized cavity to block it.

[0095] As another embodiment, the sealing portion can also be made of liquid solidification. Practically, the sealing portion 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 portion. Practically, the valve 32 also includes a third end (in this case, the valve is a three-way valve), 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 sequence to enter the proximal end of the pressure chamber 101.

[0096] As another embodiment, the sealing portion can also adopt a melting heat shrinkage method. Practically, the sealing portion includes: a high-temperature resistant solid part, the high-temperature resistant solid part is arranged in the pressure chamber, and is 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 sealed, the 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 seal 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 material, because only the section provided with the high-temperature resistant solid part is heated, and therefore only this part shrinks when heated.

[0097] In one embodiment, the blocking portion may also be implemented by implanting a one-way valve. Specifically, the blocking portion includes a one-way valve disposed proximal to the pressure chamber. The one-way valve is configured to allow pressurized gas or liquid outside the outer tube to flow in, thereby allowing the gas or liquid to inflate the balloon through the one-way valve. After pressure is stopped, the one-way flow prevents the gas or liquid from flowing back, forming a sealed space.

[0098] In one embodiment, when the blocking portion 5 adopts a blocking piece 51, the blocking portion further 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.

[0099] Furthermore, in one embodiment, the sealing member 51 can be assembled in two parts: a sealing pin 511 and a core rod 512, see FIG6a , and the two parts can be connected by a threaded connection. After the sealing is completed, the core rod 512 can be disconnected from the sealing pin 511, leaving only a relatively short sealing pin 511, see FIG6b , so that the length of the proximal end of the outer tube can be shortened, making operation easier. A certain thrust is applied to the core rod so that it pushes the sealing pin to move 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 inserted into the proximal end of the pressure chamber, forming a tight fit with the pressure chamber to complete the sealing. At this point, the first detachable joint and the third detachable joint are both on the core rod. Next, the core rod is continued to be pushed relative to the third detachable joint so that the first detachable joint is also on the core rod. Disconnect the mandrel from the plugging pin. The third detachable connector 52, the charging connector 3, and the liquid injection connector 4 are all on the mandrel, completing the removal of the charging connector 3 and the liquid injection connector 4 from the outer tube (see Figure 7). The third detachable connector 52, the charging connector 3, and the liquid injection connector 4 can then be removed from the mandrel.

[0100] In one embodiment, the third detachable joint 52 can be formed by combining a compressible hollow ring and a locking cap, with the locking cap being mounted on the hollow ring. When the detachable joint is connected to the outer tube, the hollow ring is mounted on the outer tube. By tightening the locking cap, the hollow ring and the outer tube are compressed and tightly attached, achieving a sealed connection between the detachable joint and the outer tube. Once the locking cap is loosened, the detachable joint can be removed.

[0101] In one embodiment, when the charging connector is connected to the liquid injection connector, since the liquid injection connector has already been removably fastened to the outer tube, the charging connector only needs to be connected to the liquid injection connector, and no removable fastening to the outer tube is required. In a different embodiment, when the charging connector is not connected to the liquid injection connector, the charging connector needs to be removably fastened to the outer tube separately, namely, including: a first removable connector 31, which can also be in the form of a compressible hollow ring and a locking cap, with the locking cap being mounted on the hollow ring. The principle of this is similar to that of the third removable connector 52, and will not be further described here.

[0102] In one embodiment, referring to FIG8 , there are at least two liquid injection chambers 102: a first liquid injection chamber 1021 and a second liquid injection chamber 1022. Correspondingly, there are at least two liquid outlets 103: a first liquid outlet 1031 and a second liquid outlet 1032. The first liquid injection chamber 1021 communicates with the outside world via the first liquid outlet 1031, and the second liquid injection chamber 1022 communicates with the outside world via the second liquid outlet 1032. Providing at least two liquid injection chambers allows for at least two liquid outlet locations, meeting different liquid injection requirements at different locations.

[0103] Practically, the first liquid outlet 1031 and the second liquid outlet 1032 are located on different ends of the balloon, as shown in Figure 8. After the balloon is fully inflated, the area is blocked or expanded, making it difficult for liquid to circulate between the two sides of the balloon. Therefore, the liquid outlets provided on both sides of the balloon can meet the different injection needs of different parts of the balloon. The part at the front of the balloon may require injection for hemostasis and anti-inflammation, while the part at the back of the balloon may require injection for lumen cleaning.

[0104] 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 can be located at the same position in the axial direction of the outer tube, as shown in FIG8 . In this case, liquid injection of the two liquid inlets can be achieved through the same liquid injection joint. Two liquid injection ports can be provided on the same liquid injection joint, respectively connected to the two liquid inlets, thereby achieving separate liquid injection of the two liquid injection cavities.

[0105] As another embodiment, the first and second liquid inlets 1041, 1042 corresponding to the first and second liquid inlets 1021, 1022 can be staggered in the axial direction of the outer tube, as shown in FIG9 , with one in front and one in the back. In this case, liquid injection into the two liquid inlets can be achieved through different injection connectors. Two injection connectors can be used, and the corresponding injection ports also include two: a first injection port 4011 and a second injection port 4022. The two injection connectors can be connected to each other and can be removed together.

[0106] 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, please refer to Figures 8 and 9.

[0107] In one embodiment, the outer diameter of the balloon in its uninflated state is equal to or smaller than the outer diameter of a portion of the outer tube; the portion of the outer tube being the portion not enclosed by the balloon. This allows the catheter to maintain the same size or be thinner after the balloon is installed, thus preventing the catheter from being difficult to pass through the instrument lumen.

[0108] In one embodiment, to prevent the overall catheter diameter from increasing after balloon assembly, the outer tube comprises 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 larger than that of the first outer tube segment 11. The balloon is sheathed within the first outer tube segment, which has a smaller outer diameter. (See Figure 2 ).

[0109] In one embodiment, the multi-lumen balloon catheter further comprises a tip catheter 6, the proximal end of which is sealedly connected to the distal end of the outer tube, the outer tube and the tip catheter communicating with each other; the distal end of the tip catheter is a closed structure; the distal end of the tip catheter is the end of the tip catheter that is distal to the distal end of the outer tube (see Figure 1). The tip catheter has a lower hardness than the outer tube, ensuring the flexibility of the catheter tip and reducing damage to the mucosal lining during catheter passage.

[0110] In one embodiment, the catheter further comprises an inner core 7 disposed within the outer tube 1, extending through the portion of the outer tube encased within the balloon (see Figure 1). The distal end of the inner core 7 extends into the tip catheter 6. The distal end of the inner core is the end of the inner core distal from the proximal end of the outer tube. The inner core provides support for the front end of the catheter, preventing damage during insertion and removal.

[0111] 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 end where the balloon connects to the outer tube and is away from the proximal end of the outer tube. This arrangement can better ensure support for the front end of the catheter.

[0112] In one embodiment, the balloon is configured to be inflated to a plurality of diameters. For example, in a non-inflated state, the balloon has a diameter of less than 3 mm, and after inflation, the balloon has a diameter of 4 to 30 mm.

[0113] In one embodiment, a developing ring 8 is further provided in the outer tube 1 . The developing ring can be provided near the balloon, for example, at both ends of the balloon, as shown in FIG1 .

[0114] One embodiment further provides a multi-lumen balloon catheter system, comprising: a multi-lumen balloon catheter according to any of the above embodiments, a pressure-inflating device, and a liquid-injection device. When the balloon needs to be inflated, the pressure-inflating device is connected to the pressure-inflating port and configured to inflate the balloon; when the liquid outlet needs to discharge liquid, the liquid-injection device is connected to the liquid outlet and configured to infuse liquid into the liquid-injection cavity, thereby discharging liquid from the liquid outlet.

[0115] Throughout this specification, references to terms such as "one embodiment," "an example," "a specific implementation," or "an example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

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-filling 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 to 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 sheathed on the outer tube, and both ends of the balloon are sealed and connected to the outer tube respectively; the balloon is in communication with the inflation chamber; The device further comprises: a pressure-charging connector portion, which is sealedly connected to the proximal end of the outer tube and further communicates with the pressure-charging chamber when the balloon needs to be inflated; the pressure-charging connector portion has a pressure-charging port for connecting to a pressure-charging device to inflate the balloon; a blocking portion configured to block the proximal end of the inflation chamber after the balloon is fully inflated, so as to prevent the proximal end from communicating with the outside world; The liquid injection joint part is sealed and connected to the outer tube when the liquid outlet needs to discharge liquid, and is then connected to the liquid injection cavity through the liquid inlet; the liquid injection joint part has a liquid injection port, which is used to be connected to 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 inflation 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 inflation 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 fully 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 provided 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 liquid injection joint portion further includes: 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; 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 portion further includes: a sealing gasket; the sealing gasket is arranged in the second detachable joint; When the second detachable joint is sealed and connected to the position corresponding to the liquid inlet on the outer tube, the sealing gasket 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 pressure 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 pressure port; the distal end of the third detachable joint is the 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, pass through the inflation joint portion, and then be inserted into the proximal end of the inflation chamber to block the proximal end of the inflation 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 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; The outer diameter of the second outer tube section is greater than the outer diameter of the first outer tube section; The balloon is sheathed 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 the tip catheter being sealedly connected to the distal end of the outer tube, the outer tube being 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 hardness 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 being disposed in the outer tube and penetrating 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 between the balloon and the outer tube, and is the connecting end 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 inflation device is connected to the inflation port of the inflation connector, and the inflation device is configured 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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