Cooling balloon catheter

Abstract

The utility model provides a cooling balloon catheter. The main balloon catheter comprises a first catheter body assembly and a first expandable balloon located at the far end of the first catheter body assembly; a liquid guide flow channel, a first filling flow channel communicated with the first expandable balloon and a liquid guide hole which is communicated with the liquid guide flow channel and is used for infusing cooling physiological liquid into the targeted cavity are formed in the first tube body assembly; the auxiliary balloon catheter comprises a second catheter body assembly and a second expandable balloon located at the far end of the second catheter body assembly. A second filling flow channel communicated with the second expandable balloon is arranged in the second tube body assembly; the first pipe body assembly and the second pipe body assembly are arranged in a mutual sliding mode. The liquid guide hole is located between the two balloons, and the first expandable balloon and / or the second expandable balloon can extrude the cooling physiological liquid in the targeted cavity into the liquid guide hole when the first expandable balloon and / or the second expandable balloon stretch. According to the cooling balloon catheter provided by the invention, the cooling physiological liquid in the targeted cavity can be fully removed.

Description

Technical Field

[0001] The present application belongs to the field of medical device technology, and more specifically, relates to a cooling balloon catheter. Background Art

[0002] For patients with high body temperature, conventional emergency treatment methods mostly use external cooling or direct gastric and rectal lavage with ice saline, which cannot quickly reduce the temperature in the patient's body. For this reason, a cooling balloon catheter for rapid cooling treatment has emerged. Its mechanism of action is to infuse cooling physiological fluid into the patient's targeted cavity through the distal end of the catheter, and the cooling physiological fluid absorbs the heat on the side wall of the targeted cavity to achieve a cooling effect. After the cooling is completed, the balloon on the catheter is filled, and the balloon stretches to squeeze the cooling physiological fluid in the targeted cavity back to the distal end of the catheter, thereby reducing the residual cooling physiological fluid in the targeted cavity.

[0003] However, the aforementioned cooling balloon catheter has only one balloon and its position is fixed. When it is inflated and stretched, it cannot completely fill the targeted cavity filled with cooling physiological fluid, resulting in the cooling physiological fluid in the targeted cavity cannot be completely discharged. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a cooling balloon catheter to solve the technical problem in the prior art that the cooling balloon catheter cannot completely squeeze out the cooling physiological fluid.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present application is to provide a cooling balloon catheter, which includes:

[0006] The main balloon catheter comprises a first tube body component having a proximal end and a distal end opposite to each other, and a first expandable balloon located at the distal end of the first tube body component; the first tube body component is used to extend into a targeted cavity of a living body; a liquid guide channel and a first filling channel are axially arranged in the first tube body component, a liquid guide hole connected to the liquid guide channel is arranged on the first tube body component, and the liquid guide hole is used to infuse a cooling physiological fluid into the targeted cavity; the first expandable balloon is connected to the first filling channel;

[0007] The auxiliary balloon catheter comprises a second tube body component having opposite proximal and distal ends, and a second expandable balloon located at the distal end of the second tube body component; the second tube body component is used to extend into a targeted cavity of a living body; a second filling channel is axially arranged in the second tube body component; the second expandable balloon is connected to the second filling channel;

[0008] The first tube body assembly and the second tube body assembly are mutually sleeved and slidably arranged, so that the interval between the first expandable balloon and the second expandable balloon can be variably arranged; the liquid guide hole is located between the first expandable balloon and the second expandable balloon, and the first expandable balloon and / or the second expandable balloon can squeeze the cooling physiological fluid in the targeted cavity into the liquid guide hole when stretched.

[0009] Optionally, a first delivery channel is axially penetrated in the first tube body assembly, the second tube body assembly is slidably disposed in the first delivery channel, and the second expandable balloon is disposed at the distal end of the first expandable balloon.

[0010] Optionally, the fluid guide hole is arranged at the distal end of the first expandable balloon.

[0011] Optionally, a second delivery channel is axially penetrated in the second tube assembly, the first tube assembly is slidably disposed in the second delivery channel, and the first expandable balloon is disposed at the distal end of the second expandable balloon.

[0012] Optionally, the fluid guide hole is arranged at the proximal end of the first expandable balloon.

[0013] Optionally, the second expandable balloon is a special-shaped balloon, and when the second expandable balloon is deployed, the side of the second expandable balloon facing the first expandable balloon is concave.

[0014] Optionally, the first expandable balloon and the first tube body assembly, and the second expandable balloon and the second tube body assembly are all integrally formed of silicone.

[0015] Optionally, the first tube body assembly further includes a proximal control portion, which is disposed at the proximal end of the first tube body assembly, and a plurality of branches are disposed on the proximal control portion, and the liquid guiding channel and the first filling channel are respectively connected to the branches.

[0016] Optionally, an active cavity is further provided in the first tube body assembly, the active cavity is used to allow the temperature sensor to extend to the distal end of the first tube body assembly, the proximal control part is provided with a temperature control assembly, and the temperature sensor is electrically connected to the temperature control assembly.

[0017] Optionally, a three-way infusion connector is provided at one of the branch openings of the proximal control portion, the three-way infusion connector comprising a first interface connected to the liquid conducting channel, a second interface for connecting an infusion component, and a third interface for connecting a liquid collection component, and the three-way infusion connector can control the first interface to connect to the second interface or the third interface.

[0018] The cooling balloon catheter provided in the embodiment of the present application has at least the following beneficial effects:

[0019] By setting the main balloon catheter and the auxiliary balloon catheter, and setting the liquid guide hole between the first expandable balloon and the second expandable balloon, when the cooling balloon catheter infuses the cooling physiological fluid into the targeted cavity, the two balloons can be contracted to fill the targeted cavity with the cooling physiological fluid; when the cooling is completed and the cooling physiological fluid needs to be removed, the two balloons can be filled synchronously or separately to make them expand and fully squeeze the cooling physiological fluid in the targeted cavity into the catheter, so that the cooling physiological fluid in the targeted cavity can be fully removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of a cooling balloon catheter according to some embodiments of the present application;

[0022] Figure 2 This is a schematic diagram of a main balloon catheter and an auxiliary balloon catheter in a cooling balloon catheter according to some embodiments of the present application when relative displacement occurs;

[0023] Figure 3 A schematic diagram of a cooling balloon catheter according to another embodiment of the present application;

[0024] Figure 4 for Figure 1 Sectional view at AA in the middle;

[0025] Figure 5 for Figure 3 Cross-section view at the middle BB. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element.

[0029] When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0032] In the description of the present application, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0033] Please also read Figures 1 to 5 , the cooling balloon catheter provided in the embodiment of the present application is now described.

[0034] refer to Figures 1 to 4 The cooling balloon catheter described in the present application includes a main balloon catheter 100 and an auxiliary balloon catheter 200 .

[0035] refer to Figures 1 to 3 Specifically, the main balloon catheter 100 includes a first tube body component 110 having relative proximal and distal ends, and a first expandable balloon 120 located at the distal end of the first tube body component 110; the first tube body component 110 is used to extend into a targeted cavity of a living body; a fluid guide channel 130 and a first filling channel 140 are axially arranged in the first tube body component 110, and a fluid guide hole 150 connected to the fluid guide channel 130 is arranged on the first tube body component 110, and the fluid guide hole 150 is used to infuse cooling physiological fluid into the targeted cavity; the first expandable balloon 120 is connected to the first filling channel 140.

[0036] The proximal end of the first tube body assembly 110 can be connected to an external infusion device and a liquid collection device. The external infusion device is used to infuse cooling physiological fluid into the fluid conduit 130. The cooling physiological fluid enters the target cavity through the fluid conduit hole 150, thereby absorbing the heat of the side wall of the target cavity to reduce the body temperature of the living body more quickly, thereby achieving the purpose of rapid cooling; at the same time, the proximal end of the first filling channel 140 is connected to the external filling device, and the filling device is used to infuse or extract fluid from the first filling channel 140, thereby expanding the first expandable balloon 120. The fluid can be air, saline, nitrogen, etc.

[0037] It is understood that the cooling physiological fluid can be 4°C physiological saline or 4°C glucose saline.

[0038] It is understandable that one or more liquid guiding holes 150 may be provided. When there are multiple liquid guiding holes 150, the multiple liquid guiding holes 150 may be arranged at intervals along the axial direction of the first tube body assembly 110, or may be distributed along the circumferential direction.

[0039] refer to Figures 1 to 3 The auxiliary balloon catheter 200 includes a second tube body component 210 having relative proximal and distal ends, and a second expandable balloon 220 located at the distal end of the second tube body component 210; the second tube body component 210 is used to extend into a targeted cavity of a living body; a second filling channel 230 is axially arranged in the second tube body component 210; the second expandable balloon 220 is connected to the second filling channel 230.

[0040] Similar to the main balloon catheter 100 described above, the proximal end of the second filling channel 230 is connected to an external filling device, which is used to fill or extract fluid from the second filling channel 230 to expand the second expandable balloon 220. The fluid may be gas, saline, contrast agent, etc.

[0041] Furthermore, the main balloon catheter 100 and the auxiliary balloon catheter 200 are mutually sleeved and slidably arranged, so that the interval between the first expandable balloon 120 and the second expandable balloon 220 can be variably arranged; the fluid guide hole 150 is located between the first expandable balloon 120 and the second expandable balloon 220, and when the first expandable balloon 120 and / or the second expandable balloon 220 are stretched, the cooling physiological fluid in the targeted cavity can be squeezed into the fluid guide hole 150.

[0042] It is understandable that there are several implementations as follows regarding the sliding arrangement of the main balloon catheter 100 and the auxiliary balloon catheter 200 .

[0043] refer to Figure 1 , Figure 2 , Figure 4 and Figure 5In some embodiments, the auxiliary balloon catheter 200 is slidably disposed in the main balloon catheter 100. Specifically, the first tube assembly 110 is provided with a first delivery channel 160 axially therethrough, the second tube assembly 210 is slidably disposed in the first delivery channel 160, and the second expandable balloon 220 is disposed at the distal end of the first expandable balloon 120. It should be understood that the proximal end of the second tube assembly 210 extends out of the proximal opening of the first delivery channel 160, and a push-pull portion 250 is disposed at the proximal end of the second tube assembly 210. By pushing the push-pull portion 250, the second expandable balloon 220 can be moved closer to or away from the first expandable balloon 120.

[0044] It can be understood that, in this embodiment, the aforementioned liquid guiding channel 130 and the first filling channel 140 are arranged on the peripheral side of the first delivery channel 160; at the same time, the liquid guiding hole 150 is arranged at the distal end of the first expandable balloon 120, so that the liquid guiding hole 150 can be located between the first expandable balloon 120 and the second expandable balloon 220.

[0045] refer to Figure 3 In other embodiments, the main balloon catheter 100 is slidably disposed in the auxiliary balloon catheter 200. Specifically, a second delivery channel 240 is axially disposed in the second tube assembly 210, the first tube assembly 110 is slidably disposed in the second delivery channel 240, and the first expandable balloon 120 is disposed at the distal end of the second expandable balloon 220. It should be understood that both the proximal end and the distal end of the first tube assembly 110 extend out of the second delivery channel 240. Similarly, a push-pull portion 250 is disposed at the proximal end of the second tube assembly 210. By pushing the push-pull portion 250, the second expandable balloon 220 can be moved closer to or away from the first expandable balloon 120.

[0046] It can be understood that, in this embodiment, the liquid guide hole 150 is disposed at the proximal end of the first expandable balloon 120, so that the liquid guide hole 150 can be located between the first expandable balloon 120 and the second expandable balloon 220. In this way, when the cooling physiological fluid needs to be extracted, the first expandable balloon 120 and the second expandable balloon 220 can squeeze the cooling physiological fluid into the space between the first expandable balloon 120 and the second expandable balloon 220 when they are filled, so that as much cooling physiological fluid as possible can enter the liquid guide channel 130 through the liquid guide hole 150, and then can be extracted by the external liquid collection device.

[0047] Specifically, refer to Figure 1 and Figure 2 , the following describes the operation process of the cooling balloon catheter of the present application.

[0048] When cooling the body temperature of a living organism, before the distal end of the cooling balloon catheter reaches the targeted cavity and when the cooling physiological fluid is perfused into the targeted cavity, the first expandable balloon 120 and the second expandable balloon 220 are both in a contracted state. After the cooling physiological fluid is perfused and the heat of the side wall of the targeted cavity is fully absorbed, the first expandable balloon 120 or the second expandable balloon 220 can be filled depending on the state of the distal end of the cooling balloon catheter. The following takes the case where the distal end of the tube body assembly 100 is located at the bottom of the targeted cavity and the first expandable balloon 120 is located at the proximal end of the second expandable balloon 220 as an example. The first expandable balloon 120 is first filled so that it pushes the cooling physiological fluid to the bottom of the targeted cavity. Since the fluid guide hole 150 is arranged at the distal end of the first tube body assembly 110, when the first expandable balloon 120 is filled and stretched, the cooling physiological fluid is squeezed into the fluid guide hole 150, so that it can enter the fluid guide channel 130 as much as possible. At the same time as or after the first expandable balloon 120 is filled, the second expandable balloon 220 is filled. When the second expandable balloon 220 is filled, it can reduce the capacity space at the bottom of the targeted cavity and cover the bottom of the targeted cavity, so that more cooling physiological fluid is pushed to the fluid guide hole 150, thereby reducing the residual cooling physiological fluid in the targeted cavity as much as possible.

[0049] refer to Figures 1 to 3 Based on any of the above embodiments, the second expandable balloon 220 can be configured as a special-shaped balloon. Specifically, the second expandable balloon 220 is configured such that when it is deployed, the side thereof facing the first expandable balloon 120 is concave. For example, in some embodiments, the second expandable balloon 220 is umbrella-shaped, and the top of the umbrella is close to the distal end of the catheter.

[0050] By configuring the second expandable balloon 220 in this way, when the second expandable balloon 220 is filled, it unfolds into an umbrella shape. At this time, the cooling physiological fluid retained in the targeted cavity is concentrated in the umbrella-shaped concave cavity of the second expandable balloon 220. At the same time, by operating the second tube body assembly 210, the second expandable balloon 220 and the first expandable balloon 120 are moved relative to each other, so that the axial space between the second expandable balloon 220 and the first expandable balloon 120 is squeezed, so that the cooling physiological fluid in the targeted cavity can be squeezed as close to the liquid guide hole 150 as possible, and the cooling physiological fluid can be sucked out as cleanly as possible under the suction of the external liquid collection device.

[0051] It can be understood that, based on any of the above embodiments, the first expandable balloon 120 and the first tube assembly 110, and the second expandable balloon 220 and the second tube assembly 210 are all integrally formed of silicone.

[0052] refer to Figures 1 to 3In some embodiments, the cooling balloon catheter further includes a proximal control unit 170, which is disposed at the proximal end of the first tube assembly 110. The proximal control unit 170 is provided with a plurality of branches, and the liquid guide channel 130, the traction assembly and the first filling channel 140 are connected to each branch respectively. It can be understood that each branch is used to connect an external device, such as a liquid collection device, an infusion device and a balloon filling device.

[0053] In some specific embodiments, three branches are provided, one of which is connected to the fluid guide channel 130 at the same time for connecting an external fluid collection device and an infusion device; one is connected to the first delivery channel 160 to enable medical workers to operate the second tube body assembly 210 at the proximal end of the catheter; and one is connected to the first filling channel 140 for filling or extracting liquid from the first expandable balloon 120.

[0054] refer to Figures 1 to 3 Further, in some embodiments, a three-way infusion connector 400 is provided at the proximal opening of the branch connected to the liquid-conducting channel 130. The three-way infusion connector 400 includes a first interface connected to the liquid-conducting channel 130, a second interface for connecting the infusion assembly, and a third interface for connecting the liquid collection assembly. The three-way infusion connector 400 can control the first interface to connect to the second interface or the third interface. The three-way infusion connector 400 has a first state in which the first interface is connected to the second interface, a second state in which the first interface is connected to the third interface, and a closed state in which the first interface is closed.

[0055] Specifically, when the cooling balloon catheter performs an in vivo cooling operation on a living body, the distal end of the delivery tube is first extended into the targeted cavity of the living body, and then the three-way infusion connector 400 is set from the closed state to the first state. At this time, the cooling physiological fluid can be input into the targeted cavity of the living body from the second interface. After the preset volume of cooling physiological fluid is input, the delivery of the cooling physiological fluid is stopped, and the three-way infusion connector 400 is set from the first state to the second state. After the cooling physiological fluid absorbs the heat of the targeted cavity and rises to a certain temperature, the second expandable balloon 220 or the first expandable balloon 120 is filled with fluid, so that the first expandable balloon 120 or the second expandable balloon 220 is expanded with the fluid to discharge the cooling physiological fluid in the targeted cavity of the living body from the third interface of the three-way infusion connector 400. The cycle is repeated until the body temperature of the living body drops to a safe temperature, and then the cooling operation can be stopped.

[0056] refer to Figures 1 to 4It can be understood that, in a further embodiment, an active cavity 180 is further provided in the first tube assembly 110. The active cavity 180 is used to allow the temperature sensor 310 to extend to the distal end of the first tube assembly 110, and the proximal control unit 170 is provided with a temperature control component 320, and the temperature sensor 310 is electrically connected to the temperature control component 320. Correspondingly, a branch connected to the active cavity 180 is also provided in the proximal control unit 170, so that the temperature sensor 310 can enter the active cavity 180 from the proximal opening of the branch and then move to the distal end of the first tube assembly 110 to monitor the temperature in the target cavity.

[0057] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A cooling balloon catheter, characterized in that: include: A main balloon catheter comprises a first tubular body component having opposite proximal and distal ends, and a first expandable balloon located at the distal end of the first tubular body component; The first tube body component is used to extend into the targeted cavity of a living body; a liquid conduction channel and a first filling channel are axially arranged in the first tube body component, a liquid conduction hole connected to the liquid conduction channel is arranged on the first tube body component, and the liquid conduction hole is used to infuse cooling physiological fluid into the targeted cavity; the first expandable balloon is connected to the first filling channel; The auxiliary balloon catheter comprises a second tube body component having opposite proximal and distal ends, and a second expandable balloon located at the distal end of the second tube body component; the second tube body component is used to extend into a targeted cavity of a living body; a second filling channel is axially arranged in the second tube body component; the second expandable balloon is connected to the second filling channel; The first tube body assembly and the second tube body assembly are mutually sleeved and slidably arranged, so that the interval between the first expandable balloon and the second expandable balloon can be variably arranged; the liquid guide hole is located between the first expandable balloon and the second expandable balloon, and the first expandable balloon and / or the second expandable balloon can squeeze the cooling physiological fluid in the targeted cavity into the liquid guide hole when stretched.

2. The cooling balloon catheter according to claim 1, characterized in that: A first delivery channel is axially penetrated in the first tube assembly, the second tube assembly is slidably disposed in the first delivery channel, and the second expandable balloon is disposed at the distal end of the first expandable balloon.

3. The cooling balloon catheter according to claim 2, characterized in that: The fluid guide hole is arranged at the distal end of the first expandable balloon.

4. The cooling balloon catheter according to claim 1, characterized in that: A second delivery channel is axially penetrated in the second tube assembly, the first tube assembly is slidably disposed in the second delivery channel, and the first expandable balloon is disposed at the distal end of the second expandable balloon.

5. The cooling balloon catheter according to claim 4, characterized in that: The fluid guide hole is arranged at the proximal end of the first expandable balloon.

6. The cooling balloon catheter according to any one of claims 1 to 5, characterized in that: The second expandable balloon is a special-shaped balloon. When the second expandable balloon is deployed, the side of the second expandable balloon facing the first expandable balloon is concave.

7. The cooling balloon catheter according to claim 2, characterized in that: The first expandable balloon and the first tube body component, the second expandable balloon and the second tube body component are all integrally formed of silicone.

8. The cooling balloon catheter according to any one of claims 1 to 5, characterized in that: The first tube body component also includes a proximal control portion, which is arranged at the proximal end of the first tube body component. The proximal control portion is provided with a plurality of branches, and the liquid guide channel and the first filling channel are respectively connected to the branches.

9. The cooling balloon catheter according to claim 8, characterized in that: An active cavity is also provided in the first tube body component, and the active cavity is used to allow the temperature sensor to extend to the distal end of the first tube body component. The proximal control part is provided with a temperature control component, and the temperature sensor is electrically connected to the temperature control component.

10. The cooling balloon catheter according to claim 8, characterized in that: A three-way infusion connector is provided at one of the branch openings of the proximal control part, and the three-way infusion connector includes a first interface connected to the liquid conducting channel, a second interface for connecting the infusion component, and a third interface for connecting the liquid collection component. The three-way infusion connector can control the first interface to connect to the second interface or the third interface.

Images