Rapid contraction intracranial balloon catheter

Abstract

The utility model discloses a rapid contraction intracranial balloon catheter, which relates to the technical field of medical instruments, and comprises a catheter seat, a balloon catheter, a balloon catheter head and a balloon catheter head, one end of the catheter is arranged in the catheter seat, the catheter comprises an inner tube and an outer tube, a circulation channel is arranged between the outer tube and the inner tube, the circulation channel is communicated with the filling cavity, and an inner cavity of the inner tube is communicated with the guide cavity; the outer tube is sleeved with the balloon, one end of the balloon is fixedly connected with the end of the outer tube, and the other end of the balloon is fixedly connected with the inner tube, so that a balloon cavity of the balloon is communicated with the circulation channel; a plurality of drainage assemblies are arranged on the inner tube in the balloon, and the balloon cavity of the balloon can be communicated with the inner cavity of the inner tube when the drainage assemblies are opened. According to the intracranial balloon catheter capable of rapidly contracting, the technical problem that after an existing intracranial balloon catheter is used, the balloon contraction speed is low is solved, the purpose that after the intracranial balloon catheter is used, contraction of the balloon can be rapidly controlled is achieved, and the risk of occurrence of disability stroke in an operation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of fast retraction intracranial balloon catheter. BACKGROUND

[0002] In modern medical field, vascular intervention surgery has become an important means for treating various vascular diseases. As the key medical instrument in such surgery, intracranial balloon catheter plays an irreplaceable role in the treatment of vascular stenosis, aneurysm and other diseases due to its accurate positioning and controllable expansion. The balloon is sent into the target blood vessel or brain tissue position through the catheter, and an appropriate amount of liquid is injected into the balloon using a syringe to make it expand to achieve the treatment purpose.

[0003] However, after the use of intracranial balloon catheter, the balloon needs to be retracted, and the existing balloon retraction speed is slow, which can cause the balloon to expand for a long time to block the blood vessels, so that the blood cannot circulate normally, and even more seriously, it can cause the risk of disabling stroke.

[0004] Therefore, how to provide a fast retraction intracranial balloon catheter to shorten the balloon retraction time is a technical problem that needs to be solved by those skilled in the art at present. SUMMARY

[0005] The utility model aims at providing a kind of fast retraction intracranial balloon catheter, solve the technical problem that the existing intracranial balloon catheter is slow after use.

[0006] To achieve the above-mentioned purpose, the utility model provides a kind of fast retraction intracranial balloon catheter, comprising:

[0007] The catheter seat includes a filling cavity and a guide cavity.

[0008] The catheter is arranged in the catheter seat, and the catheter includes an inner tube and an outer tube. A flow passage is provided between the outer tube and the inner tube. The flow passage is in communication with the filling cavity. The inner cavity of the inner tube is in communication with the guide cavity.

[0009] The balloon is sleeved on the outer tube. One end of the balloon is fixedly connected with the end of the outer tube, and the other end is fixedly connected with the inner tube. The balloon cavity of the balloon is in communication with the flow passage, so that the fluid in the guide cavity can be injected into the balloon cavity through the flow passage.

[0010] A plurality of liquid discharge assemblies are arranged on the inner tube in the balloon. When the liquid discharge assemblies are opened, the balloon cavity is in communication with the inner cavity of the inner tube.

[0011] Preferably, the liquid discharge assembly comprises:

[0012] a moving cavity arranged axially on the inner tube;

[0013] a drainage channel arranged radially on the inner tube, the moving cavity and the drainage channel being in communication with each other;

[0014] a blocking plate arranged slidingly and in close contact with the moving cavity, the blocking plate having a first position and a second position in the moving cavity, when in the first position, the blocking plate blocks the drainage channel, and when in the second position, the blocking plate is away from the drainage channel, and the drainage channel is in a pass-through state.

[0015] Preferably, the device further comprises a driving mechanism, which comprises:

[0016] a mounting channel arranged radially on the body of the catheter seat, the bottom opening of the mounting channel being arranged opposite to the outer wall of the inner tube; and

[0017] a sliding block slidingly connected with the sliding groove;

[0018] a pull wire, the inner tube being provided with a pull wire cavity for the pull wire to pass through, one end of the pull wire cavity being in communication with the moving cavity, and the other end being in communication with the mounting channel, so that one end of the pull wire is connected with the blocking plate, and the other end is connected with the sliding block, thereby enabling the blocking plate to move in the direction towards the sliding block.

[0019] Preferably, the moving cavity and the blocking plate are both arc-shaped in cross section.

[0020] Preferably, a sealing member is arranged between the inner tube and the catheter seat, the starting point of the sealing member being located at the edge of the outlet of the filling cavity, and the ending point being located at the connection between the inner tube and the catheter seat.

[0021] Preferably, the pull wire is a high polymer filament or a metal wire.

[0022] Preferably, the surface of the balloon is provided with a lubricating coating or an anti-thrombus coating.

[0023] Preferably, the balloon is adhesively connected with the inner tube and the outer tube.

[0024] Preferably, an interface is arranged on the catheter seat, the interface being used for connecting with an external injection device, so as to facilitate the injection of fluid into the filling cavity.

[0025] Compared to the aforementioned background technology, the present invention provides a rapid-shrink intracranial balloon catheter. During use, fluid (such as saline) is injected into the flow channel through the filling cavity of the catheter seat. The fluid enters the balloon cavity through the flow channel, causing the balloon to gradually inflate. After use, the opening of the drainage component connects the balloon cavity with the inner lumen of the inner tube, and the fluid in the balloon cavity can be drained into the human body for absorption through the inner tube.

[0026] Two drainage components are spaced apart on the inner tube inside the balloon to facilitate faster balloon contraction.

[0027] In summary, the rapid-contraction intracranial balloon catheter provided in this application allows the balloon to contract rapidly after use, thereby shortening the balloon contraction time and reducing the risk of disabling stroke; the rapid-contraction intracranial balloon catheter can shorten the operation time, thereby reducing the risk of various complications during the operation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 A schematic diagram of a rapidly shrinking intracranial balloon catheter structure provided in this embodiment of the present invention;

[0030] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0031] Figure 3 This is a schematic diagram of the first position of the sealing plate provided in an embodiment of the present utility model;

[0032] Figure 4 This is a schematic diagram of the second position of the sealing plate provided in an embodiment of the present utility model;

[0033] Figure 5 This is a schematic diagram of a single sealing plate and wire connection provided in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram showing the connection between the two sealing plates and the wire provided in this embodiment of the utility model;

[0035] Figure 7 for Figure 1 A schematic diagram of the cross-section;

[0036] Figure 8 for Figure 1a local enlarged view of the detail.

[0037] wherein:

[0038] 1-catheter seat, 2-inner tube, 3-outer tube, 4-balloon, 5-drainage assembly, 6-seal;

[0039] 11-filling cavity, 12-guide cavity;

[0040] 31-flow-through channel;

[0041] 51-moving cavity, 52-drainage channel, 53-blocking plate, 54-mounting channel, 55-sliding block, 56-pulling wire. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0044] Referring to Figure 1 The present application provides a rapid retraction intracranial balloon catheter, which comprises a catheter seat 1, a filling cavity 11 and a guide cavity 12; a catheter, one end of which is arranged in the catheter seat 1, the catheter comprising an inner tube 2 and an outer tube 3, a flow-through channel 31 being arranged between the outer tube 3 and the inner tube 2, the flow-through channel 31 being in communication with the filling cavity 11, and the inner cavity of the inner tube 2 being in communication with the guide cavity 12; a balloon 4, which is sleeved on the outer tube 3, one end of the balloon 4 being fixedly connected with the end of the outer tube 3, and the other end being fixedly connected with the inner tube 2, so that the balloon cavity of the balloon 4 is in communication with the flow-through channel 31, so that the fluid in the guide cavity 12 can be injected into the balloon cavity of the balloon 4 through the flow-through channel 31; a drainage assembly 5 is arranged on the inner tube 2 in the balloon 4, and the drainage assembly 5 can make the balloon cavity of the balloon 4 in communication with the inner cavity of the inner tube 2 when it is opened.

[0045] That is, specifically, the catheter seat 1 is of Y-shaped structure, the branches are arranged downwardly and obliquely, the guide cavity 12 is arranged through the catheter seat 1 in the horizontal direction, and the filling cavity 11 is arranged through the branches;

[0046] The catheter comprises an inner tube 2 and an outer tube 3, a flow passage 31 is arranged between the inner tube 2 and the outer tube 3, the outer tube 3 is sleeved on the outer side of the inner tube 2, the length of the outer tube 3 is less than the length of the inner tube 2, the middle end of the guide cavity 12 is provided with an arc-shaped section, the right end of the outer tube 3 abuts against the arc-shaped end edge, and then the guide cavity 12 and the filling cavity 11 are not communicated with each other due to the inner tube 2, the end of the outer tube 3 is sealingly connected with the inner wall of the guide cavity 12, and the end of the outer tube 3 is located on the left side edge of the upper end opening of the guide cavity 12, and then the flow passage 31 is communicated with the filling cavity 11 of the catheter seat 1.

[0047] The balloon 4 is sleeved on the outer tube 3, the right end of the balloon 4 is fixedly and sealingly connected with the left end of the outer tube 3, and the left end of the balloon 4 is fixedly connected with the inner tube 2, the above-mentioned connection mode makes the balloon cavity of the balloon 4 communicated with the flow passage 31, so that the fluid in the filling cavity 11 can be injected into the balloon cavity of the balloon 4 through the flow passage 31, and the inflation of the balloon is realized.

[0048] Working principle: in use, the fluid (such as normal saline) is injected into the flow passage 31 through the filling cavity 11 of the catheter seat 1, the fluid enters the balloon cavity of the balloon 4 through the flow passage 31, the balloon 4 is gradually inflated and adheres to the blood vessel wall, and the inner cavity of the inner tube 2 is communicated with the guide cavity 12, which can be used to guide the stent into the target blood vessel; after use, the opening of the drainage assembly 5 makes the balloon cavity of the balloon 4 communicated with the inner cavity of the inner tube 2, and the fluid in the balloon cavity can be discharged into the human body through the inner tube 2 or extracted out of the body through the guide cavity 12, since the fluid is normal saline, it does not damage the human body, so it can be safely left in the body or extracted.

[0049] In summary, the rapid retraction intracranial balloon catheter provided by the application can make the balloon cavity of the balloon 4 communicated with the inner cavity of the inner tube 2 by opening the drainage assembly 5, and the fluid in the balloon cavity can be discharged into the human body and naturally absorbed through the inner tube 2, so as to rapidly retract the balloon and shorten the retraction time of the balloon, thereby reducing the risk of disabling stroke; the rapid retraction intracranial balloon catheter can shorten the operation time, thereby reducing the risk of various complications in the operation process.

[0050] On the basis of the above embodiment, referring to Figures 2-4 , the drainage assembly 5 comprises a moving cavity 51 arranged in the axial direction of the tube body of the inner tube 2, a drainage passage 52 arranged in the radial direction of the tube body of the inner tube 2, the moving cavity 51 and the drainage passage 52 are communicated with each other, a sealing plate 53 slidingly and tightly arranged in the moving cavity 51, the position of the sealing plate 53 in the moving cavity 51, the sealing plate 53 has a first position (such as Figure 3 ) and a second position (such as Figure 4 ) in the moving cavity 51, when the sealing plate 53 is in the first position, the sealing plate 53 seals the drainage passage 52, and when the sealing plate 53 is in the second position, the sealing plate 53 is away from the drainage passage 52, and the drainage passage 52 is in a pass-through state.

[0051] Specifically, the inner tube 2 has a movable cavity 51 in the axial direction of the tube body, and the drain channel 52 is arranged radially at intervals in the inner tube 2, thus forming a vertically intersecting passage. It can be understood that the inner tube 2 has a multi-layer structure, such as including an inner layer, a middle layer and an outer layer. A part of the middle layer is hollowed out to serve as the movable cavity 51, in which the sealing plate 53 moves.

[0052] Before using the rapid-contraction intracranial balloon catheter, the occlusion plate 53 should be in the first position, tightly sealing the drainage channel 52. This state is as follows: Figure 3 As shown, this ensures that the drainage channel 52 will not leak fluid accidentally before it is actively opened.

[0053] Workflow:

[0054] When balloon 4 needs to be deflated, the sealing plate 53 moves from the first position to the second position, see [reference]. Figure 4 When the drainage channel 52 is opened, the fluid in the balloon 4 begins to flow into the inner lumen of the inner tube 2 through the drainage channel 52; the fluid can be discharged into the human body through the inner tube 2 for natural absorption or extracted from the body through the guide lumen 12 and the catheter seat 1.

[0055] Specifically, see Figure 3 , Figure 4 The length of the moving cavity 51 located on the right side of the drainage channel 52 is greater than the length of the sealing plate 53. That is to say, when the right end of the sealing plate 53 moves to abut against the right side of the moving cavity 51, the sealing plate 53 is in the second position, the sealing plate 53 is completely away from the drainage channel 52, and the drainage channel 52 is in the open state.

[0056] Based on the above embodiments, see Figure 5 , Figure 7 and Figure 8 The driving mechanism includes an installation channel 54, which is radially located on the body of the conduit seat 1. The bottom opening of the installation channel 54 is opposite to the outer wall of the inner tube 2. Slide grooves are provided on both sides of the installation channel 54. A slider 55 is slidably connected to the slide grooves. A wire drawing 56 is provided axially on the tube body of the inner tube 2 for the wire drawing 56 to pass through. One end of the wire drawing cavity is connected to the moving cavity 51, and the other end is connected to the installation channel 54, so that one end of the wire drawing 56 is connected to the sealing plate 53 and the other end is connected to the slider 55, thereby allowing the sealing plate 53 to move in the direction toward the slider 55.

[0057] In other words, the installation channel 54 is located radially on the body of the guide tube seat 1, with its bottom opening opposite to the outer wall of the inner tube 2. The sliding groove is provided on both sides of the installation channel 54, providing a sliding track for the slider 55 and ensuring that the slider 55 can move smoothly within the installation channel 54.

[0058] The tube body of the inner tube 2 is axially provided with a pull wire cavity for the pull wire 56 to pass through; one end is connected with the blocking plate 53, and the other end is connected with the sliding block 55; the force or displacement is transmitted through the sliding of the sliding block 55, so as to control the moving distance of the blocking plate 53 in the moving cavity 51.

[0059] Working principle: when it is needed to move the blocking plate 53, the doctor can drive the pull wire 56 to move by operating the sliding of the sliding block 55 in the installation channel 54, the movement of the pull wire 56 drives the blocking plate 53 to move in the moving cavity 51 in the direction towards the sliding block 55, so as to realize the opening of the drainage channel 52, when the blocking plate 53 cannot move, at this time, the blocking plate 53 is located at the second position, and the blocking plate 53 completely leaves the drainage channel 52, and the drainage channel 52 is in the pass-through state.

[0060] Specifically, since the rapid retraction intracranial balloon catheter is a disposable consumable, it is only needed to ensure that the blocking plate 53 moves in the moving cavity 51 in the direction towards the sliding block 55, so as to realize the retraction, and the drainage channel 52 is in the pass-through state.

[0061] Specifically, in actual application, appropriate pull wire 56 material can be selected according to specific needs, and the application preferably is a high molecular fiber bundle. The main reason is that the metal wire has good corrosion resistance and biocompatibility, and the high molecular fiber bundle such as nylon and polyester also has good strength and wear resistance, and has good flexibility and plasticity. Compared with the metal wire, the high molecular fiber bundle can be more light, easier to process and bend, and is suitable for occasions requiring higher flexibility and lower cost.

[0062] And the pull wire 56 axially passes through the wall of the inner tube 2, without increasing the additional radial size, so as not to greatly reduce the structural strength of the inner tube 2.

[0063] Referring to Figure 5 The cross-sectional shape of the moving cavity 51 and the blocking plate 53 is arc-shaped, and is arc-shaped and fitted, so as to increase the fitting area of the moving cavity 51 and the blocking plate 53, so as to improve the sealing performance of the blocking plate 53; and through the control of the arc and the cooperation with the balloon 4, the movement of the liquid from the inner tube 2 towards the balloon 4 can be avoided.

[0064] On the basis of the above-mentioned embodiments, the inner tube 2 and the catheter seat 1 are provided with a sealing element 6, the starting point of which is located at the edge of the outlet of the filling cavity 11, and the ending point is located at the connection between the inner tube 2 and the catheter seat 1, which ensures that the liquid entering from the filling cavity 11 can only flow in the direction of the balloon 4, and is not allowed to flow in the direction of the installation channel 54, which helps to prevent device failure or patient injury caused by liquid flowing in the wrong direction. By forming a tight seal between the inner tube 2 and the catheter seat 1, the sealing element 6 effectively prevents liquid from flowing from the filling cavity 11 along the outer wall of the inner tube 2 to the chute 13, thereby improving the safety and reliability of the entire device.

[0065] The sealing element 6 also plays a role in enhancing the structural strength of the catheter seat 1, by providing additional support and stability between the inner tube 2 and the catheter seat 1, which helps to prevent structural damage caused by external impact.

[0066] The surface of the balloon 4 is provided with a lubricating coating, which can reduce the friction between the balloon and the blood vessel wall, making it easier for the balloon to pass through the blood vessel;

[0067] The connection between the balloon and the inner tube 2 and the outer tube 3 is an adhesive connection, and the catheter seat 1 is provided with an interface for connecting with an external injection device to facilitate the injection of fluid into the filling cavity 11.

[0068] The present application also provides another embodiment, which is different in that the inner tube 2 located in the balloon 4 is provided with two liquid discharge assemblies 5 at intervals, which means that there are two independent channels for discharging liquid during the contraction of the balloon 4, thereby further reducing the contraction time.

[0069] Each liquid discharge assembly 5 includes a moving cavity 51 and a radial liquid discharge channel 52, the moving cavity 51 provides a moving space for the sealing plate 53, and the liquid discharge channel 52 is the channel for discharging liquid from the balloon 4. The two sealing plates 53 share a pull wire 56 (as Figure 6 By pulling the pull wire 56, the doctor can control the position of the two sealing plates 53 at the same time, thereby ensuring that the two liquid discharge channels 52 can be opened at the same time.

[0070] It should be noted that in the present specification, relational terms such as first and second are used only to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0071] The principle and implementation mode of the present application are described by using specific examples in the present application, and the above examples are only used for helping to understand the method and core idea of the present application. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principle of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A rapid-contracting intracranial balloon catheter, characterized by, The catheter comprises: a catheter seat (1) comprising a filling cavity (11) and a guide cavity (12); a catheter arranged in the catheter seat (1), the catheter comprising an inner tube (2) and an outer tube (3), a flow passage (31) being arranged between the outer tube (3) and the inner tube (2), the flow passage (31) being in communication with the filling cavity (11), and an inner cavity of the inner tube (2) being in communication with the guide cavity (12); a balloon (4) arranged on the outer tube (3), one end of the balloon (4) being fixedly connected with an end of the outer tube (3), and the other end being fixedly connected with the inner tube (2), so that a balloon cavity of the balloon (4) is in communication with the flow passage (31), and fluid in the guide cavity (12) can be injected into the balloon cavity of the balloon (4) through the flow passage (31); a plurality of drainage assemblies (5) are arranged on the inner tube (2) in the balloon (4), and the drainage assemblies (5) are opened to make the balloon cavity of the balloon (4) in communication with the inner cavity of the inner tube (2).

2. The rapid-contracting intracranial balloon catheter of claim 1, wherein, The drainage assembly (5) comprises: a moving cavity (51) arranged axially on the inner tube (2); a drainage passage (52) arranged radially on the inner tube (2), the moving cavity (51) and the drainage passage (52) being in communication with each other; a blocking plate (53) arranged slidably and abuttingly in the moving cavity (51), the blocking plate (53) having a first position and a second position in the moving cavity (51), when the blocking plate (53) is in the first position, the blocking plate (53) blocks the drainage passage (52), when the blocking plate (53) is in the second position, the blocking plate (53) is away from the drainage passage (52), and the drainage passage (52) is in a pass-through state.

3. The rapid-contracting intracranial balloon catheter of claim 2, wherein, The catheter further comprises a driving mechanism, the driving mechanism comprising: a mounting passage (54) arranged radially on the catheter seat (1), an opening at a bottom of the mounting passage (54) being opposite to an outer wall of the inner tube (2), and slide grooves being arranged on two sides of the mounting passage (54); a sliding block (55) slidably connected with the slide grooves; a pull wire (56), a pull wire cavity for the pull wire (56) to pass through being arranged axially on the inner tube (2), one end of the pull wire cavity being in communication with the moving cavity (51), and the other end being in communication with the mounting passage (54), so that one end of the pull wire (56) is connected with the blocking plate (53), and the other end is connected with the sliding block (55), and the blocking plate (53) can be moved in a direction towards the sliding block (55).

4. The rapid-conformance intracranial balloon catheter of claim 2, wherein, The moving cavity (51) and the blocking plate (53) are both arc-shaped in cross section.

5. The rapid-conformance intracranial balloon catheter of claim 2, wherein, A sealing member (6) is arranged between the inner tube (2) and the catheter seat (1), a starting point of the sealing member (6) being located at an edge of an outlet of the filling cavity (11), and an ending point being located at a connection between the inner tube (2) and the catheter seat (1).

6. The rapid-conformance intracranial balloon catheter of claim 3, wherein, The pull wire (56) is a high polymer wire bundle or a metal wire.

7. The rapid-conformance intracranial balloon catheter of claim 1, wherein, A lubricating coating or an anti-thrombus coating is arranged on a surface of the balloon (4).

8. The rapid-conformance intracranial balloon catheter of claim 1, wherein, The connection of the balloon (4) to the inner tube (2), to the outer tube (3) is an adhesive connection.

9. The rapid-conformance intracranial balloon catheter of claim 1, wherein, The catheter seat (1) is provided with a connection port for connecting to an external injection device in order to inject fluid into the inflation chamber (11).

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