Detachable occluding balloon catheter and system thereof

Abstract

The present invention discloses a detachable blocking balloon catheter and its system, comprising: an outer tube, a balloon; the balloon is sheathed on the outer tube, and both ends of the balloon are respectively sealedly connected to the outer tube; the balloon is connected to the outer tube; further comprising: a detachable device; comprising: a first detachable joint and a valve; the distal end of the first detachable joint is detachably and sealedly connected to the proximal end of the outer tube, and its proximal end is sealedly connected to the first end of the valve, and the second end of the valve is a charging port for connecting to the charging device to pressurize the balloon; the distal end of the outer tube is not connected to the outside world; further comprising: a blocking portion, which is configured to block the proximal end of the outer tube so that it is not connected to the outside world; after the blocking portion completes the blocking of the proximal end of the outer tube, the detachable device is configured to be detached from the outer tube. According to the present invention, the catheter can enter the body through the endoscope instrument channel for interventional dilation, achieve a blocking or hemostatic effect, and can keep the balloon inflated to withdraw the endoscope from the body.

Description

Technical Field

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

[0002] Existing balloon dilatation catheters enter through the lumen of endoscopic instruments. After the balloon is inflated, the endoscope cannot be withdrawn from the human body, or the balloon cannot maintain continuous pressure when the endoscope is withdrawn from the human body, forcing the endoscope and catheter to be relieved of pressure and then reinserted. It is impossible to accurately locate the area that needs to be expanded, making it difficult to achieve blockage or hemostasis of the required area. Summary of the Invention

[0003] The present invention provides a detachable blocking balloon catheter and a system thereof, so as to solve the problem in the prior art that an endoscope cannot be withdrawn from the human body after the balloon is inflated, or the balloon cannot maintain continuous pressure when the endoscope is withdrawn from the human body.

[0004] According to a first aspect of the present invention, a detachable occluding balloon catheter is provided, comprising: an outer tube and a balloon; wherein:

[0005] 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 and the outer tube are in communication;

[0006] Also includes: a detachable device; the detachable device includes: a first detachable joint and a valve; wherein,

[0007] When the balloon needs to be inflated, the distal end of the first detachable joint is detachably and sealedly connected to the proximal end of the outer tube, the proximal end of the first detachable joint is sealedly connected to the first end of the valve, and the second end of the valve is a charging port for connecting to a charging device to inflate the balloon; the distal end of the first detachable joint is the end of the first detachable joint close to the distal end of the outer tube;

[0008] The distal end of the outer tube is not connected to the outside world;

[0009] The device further comprises: a blocking portion configured to block the proximal end of the outer tube after the balloon is fully inflated, so as to prevent the proximal end from communicating with the outside world;

[0010] After the blocking portion completes blocking of the proximal end of the outer tube, the detachable device is configured to be detachable from the outer tube.

[0011] Preferably, the blocking portion includes: a core rod, and in this case, the detachable device further includes: a second detachable joint;

[0012] The second detachable joint is sleeved on the distal end of the mandrel;

[0013] When the proximal end of the outer tube needs to be blocked, the distal end of the second detachable joint is configured to be able to be sealed and connected to the charging port; the distal end of the second detachable joint is the end of the second detachable joint away from the proximal end of the mandrel;

[0014] The mandrel is configured to be movable relative to the second detachable joint, and to sequentially pass through the second end, the first end, and the first detachable joint of the valve, and then be inserted into the proximal end of the outer tube to seal the proximal end of the outer tube;

[0015] The detachable device is further configured to be detachable from the mandrel.

[0016] Preferably, the mandrel comprises: a first mandrel and a second mandrel, and the first mandrel and the second mandrel are sequentially distributed from the distal end to the proximal end of the mandrel;

[0017] The length of the first mandrel is smaller than that of the second mandrel, and the first mandrel is configured to be inserted into the proximal end of the outer tube to block the proximal end of the outer tube.

[0018] Preferably, the blocking portion comprises: a curable liquid;

[0019] The valve further comprises a third end, the third end of the valve being used for injecting the curable liquid, and the curable liquid can be injected into the proximal end of the outer tube;

[0020] When the proximal end of the outer tube needs to be blocked, 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 outer tube to block the proximal end of the outer tube.

[0021] Preferably, the blocking portion comprises: a high temperature resistant solid part, the high temperature resistant solid part is arranged in the outer tube and is located at the proximal end of the outer tube;

[0022] When the proximal end of the outer tube needs to be sealed, a section of the outer tube 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 outer tube after shrinkage is sealed and connected to the high-temperature resistant solid part to seal the proximal end of the outer tube.

[0023] Preferably, the blocking portion includes: a one-way valve, which is arranged at the proximal end of the outer tube;

[0024] The one-way valve is configured to allow gas or liquid outside the outer tube to flow in, but not to allow gas or liquid inside the outer tube to flow out.

[0025] Preferably, 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;

[0026] The outer diameter of the second outer tube section is greater than the outer diameter of the first outer tube section; the inner diameter of the second outer tube section is greater than the inner diameter of the first outer tube section;

[0027] The balloon is sheathed on the first outer tube segment.

[0028] Preferably, 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;

[0029] The partial section of the outer tube is the portion of the outer tube that is not wrapped in the balloon.

[0030] Preferably, it 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;

[0031] 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;

[0032] The tip catheter has a hardness less than that of the outer tube.

[0033] Preferably, the invention further comprises: a fixed guide wire, wherein the fixed guide wire is arranged in the outer tube and passes through the portion of the outer tube wrapped in the balloon;

[0034] The distal end of the fixed guide wire extends into the tip catheter, and the distal end of the fixed guide wire is an end of the fixed guide wire away from the proximal end of the outer tube.

[0035] Preferably, the fixed guidewire is fixed to the outer tube, and the distance between the fixing point of the fixed guidewire and the outer tube and the distal end of the balloon is smaller than a preset range, that is, the fixing point is located near the distal end of the balloon;

[0036] 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.

[0037] Preferably, the balloon is configured to be inflatable to multiple diameters.

[0038] According to a second aspect of the present invention, a detachable occluding balloon catheter system is provided, comprising: the detachable occluding balloon catheter and a charging device as described above; wherein,

[0039] When the balloon needs to be inflated, the inflation device is communicated with the inflation port, and the inflation device is configured to inflate the balloon.

[0040] The detachable blocking balloon catheter and its system provided by the present invention can enter the body through the endoscope instrument channel for interventional expansion, thereby achieving a blocking or hemostatic effect. After the balloon is filled, the proximal end of the catheter can be blocked by the blocking part, and the balloon can be kept filled to allow the endoscope to be withdrawn from the body.

[0041] In an optional solution of the present invention, a tip catheter is connected to the distal end of the outer tube. The tip catheter is softer than the outer tube, which can ensure the softness of the distal end of the catheter and reduce damage to the inner wall of the mucosa when the catheter passes through.

[0042] In another optional solution of the present invention, a fixed guide wire is provided in the outer tube, and the distal end of the fixed guide wire extends to the distal end of the catheter, thereby ensuring support for the front end of the catheter and preventing the catheter from being damaged during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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.

[0044] Figure 1 A schematic diagram of a detachable occluding balloon catheter according to an embodiment of the present invention;

[0045] Figure 2 is a schematic diagram of a blocking portion according to an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of a sealing portion sealing an outer tube according to an embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of a catheter after the detachable device according to one embodiment of the present invention is detached;

[0048] Figure 5 is a schematic diagram of a blocking portion according to another embodiment of the present invention;

[0049] Figure 6 is a schematic diagram of a blocking portion according to another embodiment of the present invention;

[0050] Figure 7 for Figure 6 A schematic diagram of the sealing portion after the sealing is completed;

[0051] Figure 8 is a schematic diagram of a blocking portion according to another embodiment of the present invention;

[0052] Figure 9for Figure 8 A schematic diagram of the working of the blocking portion;

[0053] Figure 10 FIG. 1 is a schematic diagram of a charging device according to an embodiment of the present invention.

[0054] Description of reference numerals:

[0055] 1- outer tube,

[0056] 11- first outer tube section,

[0057] 12- second outer tube section;

[0058] 2-Balloon,

[0059] 3-port,

[0060] 4- Detachable device,

[0061] 41- first detachable connector,

[0062] 42-two-way valve,

[0063] 43- Second detachable connector,

[0064] 44-three-way valve;

[0065] 5- mandrel,

[0066] 6- One-way valve,

[0067] 7-tip catheter,

[0068] 8-Fix the guide wire,

[0069] 81-fixed point,

[0070] 9-Syringe. DETAILED DESCRIPTION

[0071] 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.

[0072] 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.

[0073] 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.

[0074] In the description of the present invention, "plurality" means multiple, such as two, three, four, etc., unless otherwise clearly defined.

[0075] 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.

[0076] 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.

[0077] In one embodiment, a detachable occluding balloon catheter is provided, which comprises: an outer tube 1, a balloon 2, and a Figure 1 The balloon 2 is sleeved on the outer tube 1, and both ends of the balloon 2 are sealed and connected to the outer tube 1 respectively; the balloon and the outer tube are connected.

[0078] The device further comprises a detachable device 4, comprising a first detachable joint 41 and a valve (a two-way valve 42 in this embodiment). When the balloon needs to be inflated, the distal end of the first detachable joint 41 is detachably and hermetically connected to the proximal end of the outer tube 1. The proximal end of the first detachable joint 41 is hermetically connected to the first end of the valve. The second end of the valve is a charging port for connecting to the charging device to inflate the balloon 2. The distal end of the first detachable joint 41 is the end of the first detachable joint 41 that is closest to the distal end of the outer tube 1. The distal end of the outer tube is not connected to the outside world.

[0079] The device further comprises a blocking portion configured to block the proximal end of the outer tube after the balloon is fully inflated, thereby isolating the proximal end of the outer tube from the outside. After the blocking portion blocks the proximal end of the outer tube, the detachable device is configured to be detachable from the outer tube.

[0080] In one embodiment, a through hole 3 is provided on the portion of the outer tube wrapped in the balloon, and the outer tube 1 and the balloon 2 are connected through the through hole 3. Please refer to Figure 1 .

[0081] In one embodiment, the blocking portion can be physically replaced, such as the blocking portion includes: a core rod 5, and the detachable device also includes: a second detachable connector 43, please refer to Figure 2 The second detachable joint 43 is sleeved on the distal end of the core rod 5. When the proximal end of the outer tube 1 needs to be blocked, the distal end of the second detachable joint 43 is configured to be able to be sealed and connected to the pressure port; the distal end of the second detachable joint 43 is the end of the second detachable joint 43 away from the proximal end of the core rod 5, please refer to Figure 3 .

[0082] The core rod 5 is configured to be able to move relative to the second detachable joint, and can pass through the second end, the first end, and the first detachable joint 41 of the valve in sequence, and then be inserted into the proximal end of the outer tube to seal the proximal end of the outer tube and keep the pressure of the balloon. After the core rod 5 is inserted into the outer tube, it forms a tight fit with the outer tube. Since the outer tube tightly wraps the core rod, it forms a seal and has a certain connection strength. The detachable device is also configured to be detachable from the core rod, and the first detachable joint, the valve, and the second detachable joint are detached from the proximal end of the core rod. Figure 4 Shown is a schematic diagram of the catheter after the detachable device is detached.

[0083] In one embodiment, the mandrel includes a first mandrel and a second mandrel, the first mandrel and the second mandrel being arranged sequentially from the distal end to the proximal end of the mandrel. The length of the first mandrel is shorter than the length of the second mandrel. The first mandrel is placed in the second detachable joint. When the two-way valve is turned on, the second mandrel is pushed axially along the inner hole of the second detachable joint to push the first mandrel into the proximal end of the outer tube, thereby sealing the proximal end of the outer tube.

[0084] In different embodiments, the core rod is not limited to the first core rod and the second core rod in the above embodiment, and may also include only one core rod.

[0085] In one embodiment, the core rod is flexible and can be bent. Figure 4 .

[0086] In one embodiment, the blocking portion can also be solidified by liquid, such as the blocking portion includes: a solidifiable liquid; the valve also includes a third end (the valve is a three-way valve 43 in this case), and the third end of the valve is used to inject the solidifiable liquid, please refer to Figure 5 The curable liquid can enter from the third end of the valve, pass through the valve, and the first detachable joint in sequence into the proximal end of the outer tube.

[0087] When the proximal end of the outer tube needs to be sealed, a curable liquid is injected from the third end. The curable liquid is configured to cure under preset conditions and, after curing, seals the inner wall of the outer tube to seal the proximal end of the outer tube. For example, the curable liquid can be UV glue, which cures under light conditions.

[0088] In one embodiment, the sealing portion can also be melted and heat-shrinked. For example, the sealing portion includes: a high-temperature resistant solid part, which is arranged in the outer tube and located at the proximal end of the outer tube. Figure 6 The high temperature resistant solid part may be made of PEEK, PI, etc. The high temperature resistant solid part may be connected to the inner core of the catheter.

[0089] When the proximal end of the outer tube needs to be blocked, a section of the outer tube provided with a high temperature resistant solid part is configured to shrink under a preset high temperature condition. After shrinkage, the inner wall of the outer tube is wrapped around the surface of the high temperature resistant solid part and is sealed with the high temperature resistant solid part to block the proximal end of the outer tube. Figure 7 The end of the outer tube with the high-temperature resistant solid piece can be made of a heat-shrinkable material such as FEP or PET, or the entire outer tube can be made of a heat-shrinkable material. Since only the end with the high-temperature resistant solid piece is heated, only this portion shrinks.

[0090] In one embodiment, the blocking portion can also be implanted with a one-way valve. Therefore, the blocking portion includes: a one-way valve 6, which is arranged at the proximal end of the outer tube, please refer to Figure 8 The one-way valve is configured to allow gas or liquid outside the outer tube to flow in, so the gas or liquid can inflate the balloon through the one-way valve. After the inflation stops, the gas or liquid cannot flow back due to the one-way flow, forming a closed space. Please refer to Figure 9 shown.

[0091] In a preferred 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 section 11 and a second outer tube section 12; the first outer tube section 11 and the second outer tube section 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 section 12 is larger than the outer diameter of the first outer tube section 11; the inner diameter of the second outer tube section is larger than the inner diameter of the first outer tube section. The balloon is sheathed on the first outer tube section, please refer to Figure 1 .

[0092] In a preferred 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 or become thinner after the balloon is installed, thus minimizing the difficulty of passing the catheter through the instrument lumen.

[0093] In a preferred embodiment, the device further comprises: a tip catheter 7, the proximal end of the tip catheter 7 being sealedly connected to the distal end of the outer tube, the outer tube being connected to the tip catheter; the distal end of the tip catheter being a closed structure; the distal end of the tip catheter being the 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 head and reduce the damage to the inner wall of the mucosa when the catheter passes through.

[0094] In a preferred embodiment, it further comprises: a fixed guide wire 8, which is arranged 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 fixed guide wire 8 extends into the tip catheter 7 , and the distal end of the fixed guide wire is the end of the fixed guide wire away from the proximal end of the outer tube.

[0095] The fixed guidewire 8 is fixed to the outer tube 1, and the distance between the fixing point 81 of the fixed guidewire 8 and the outer tube 1 and the distal end of the balloon is less than a preset range, that is, the fixing point 81 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 farther away from the proximal end of the outer tube.

[0096] In a preferred embodiment, the balloon is configured to be able to be inflated and expanded to multiple diameters. For example, in a non-inflated state, the balloon has a diameter of less than 3 mm, and after inflation, the balloon can have a diameter of 4 to 30 mm.

[0097] In one embodiment, the detachable joint 41 and the detachable joint 43 may have the same structure, both containing a compressible hollow ring. By tightening the joint, the hollow ring is compressed and pressed against the outer tube, thereby achieving a sealed connection between the detachable joint 1 and the outer tube. After loosening, the detachable joint 1 can be detached.

[0098] One embodiment further provides a detachable occluding balloon catheter system, comprising: the detachable occluding balloon catheter of any of the above embodiments and a charging device. When the balloon needs to be inflated, the charging device is connected to the charging port and is configured to inflate the balloon.

[0099] In one embodiment, the pressure-charging device may be in the form of a syringe 9, see Figure 10 The syringe 9 cooperates with the charging port of the valve, and the syringe 9 is used to pressurize and fill the balloon. After the filling is completed, the valve is closed.

[0100] 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.

[0101] 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 detachable occluding balloon catheter, characterized in that: include: Outer tube, balloon; wherein, 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 and the outer tube are in communication; Also includes: a detachable device; the detachable device includes: a first detachable joint and a valve; wherein, When the balloon needs to be inflated, the distal end of the first detachable joint is detachably and sealedly connected to the proximal end of the outer tube, the proximal end of the first detachable joint is sealedly connected to the first end of the valve, and the second end of the valve is a charging port for connecting to a charging device to inflate the balloon; the distal end of the first detachable joint is the end of the first detachable joint close to the distal end of the outer tube; The distal end of the outer tube is not connected to the outside world; The device further comprises: a blocking portion configured to block the proximal end of the outer tube after the balloon is fully inflated, so as to prevent the proximal end from communicating with the outside world; After the blocking portion completes blocking of the proximal end of the outer tube, the detachable device is configured to be detachable from the outer tube; The blocking portion includes: a core rod, and the detachable device further includes: a second detachable joint; The second detachable joint is sleeved on the distal end of the mandrel; When the proximal end of the outer tube needs to be blocked, the distal end of the second detachable joint is configured to be able to be sealed and connected to the charging port; the distal end of the second detachable joint is the end of the second detachable joint away from the proximal end of the mandrel; The mandrel is configured to be movable relative to the second detachable joint, and to sequentially pass through the second end, the first end, and the first detachable joint of the valve, and then be inserted into the proximal end of the outer tube to seal the proximal end of the outer tube; The detachable device is further configured to be detachable from the mandrel.

2. The detachable occluding 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 inner diameter of the second outer tube section is greater than the inner diameter of the first outer tube section; The balloon is sheathed on the first outer tube segment.

3. The detachable occluding 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.

4. The detachable occluding 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.

5. The detachable occluding balloon catheter according to claim 4, characterized in that: Also includes: a fixed guidewire, the fixed guidewire being disposed in the outer tube and passing through the portion of the outer tube wrapped in the balloon; The distal end of the fixed guide wire extends into the tip catheter, and the distal end of the fixed guide wire is an end of the fixed guide wire away from the proximal end of the outer tube.

6. The detachable occluding balloon catheter according to claim 5, characterized in that: The fixed guidewire is fixed to the outer tube, and the distance between the fixing point of the fixed guidewire 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.

7. The detachable occluding balloon catheter according to any one of claims 1 to 6, characterized in that: The balloon is configured to be inflatable to a plurality of diameters.

8. A detachable occluding balloon catheter system, characterized in that: include: The detachable occluding balloon catheter and the inflation device according to any one of claims 1 to 7; wherein: When the balloon needs to be inflated, the inflation device is communicated with the inflation port, and the inflation device is configured to inflate the balloon.

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