A sheath device

Abstract

The application provides a sheath device which is long and comprises a shell extending in the longitudinal direction, a first channel and a second channel extending in the longitudinal direction and wrapped by the shell; the first channel is used as an ablation instrument channel; a part of the shell inside the first channel and the second channel is further provided with a third channel and a fourth channel; during operation, fluid is injected into at least one of the third channel and the fourth channel, and the fluid contacts the peripheral wall of the first channel to achieve the cooling function of the first channel. Accordingly, the peripheral wall of the first channel can be cooled, and the treatment effect of the ablation instrument in the first channel is not affected.

Description

Technical Field

[0001] This application relates to a sheath device that can both cool the device and ensure the therapeutic effect. Background Technology

[0002] In medical settings, high-temperature ablation devices are often used to perform surgical procedures on lesions. However, the high temperature of these devices increases the overall temperature of the sheath, raising the risk of damage to healthy tissue.

[0003] Traditional water cooling involves flowing water over the surface of a heating element. However, while cooling the body, the heating element cannot effectively retain its original internal heat, thus reducing the therapeutic effect.

[0004] Therefore, in the existing technology, there is a technical challenge of how to cool the device while ensuring the therapeutic effect. Summary of the Invention

[0005] The purpose of this application is to provide a sheath device that can both cool the device and ensure the therapeutic effect. To achieve the above objective, one aspect of this application is a sheath device configured as longitudinally elongated, comprising a shell extending along the longitudinal direction, and a first channel and a second channel extending along the longitudinal direction enclosed by the shell; wherein the first channel serves as an ablation device channel;

[0006] The portion inside the housing, excluding the first and second channels, also includes a third and a fourth channel, both of which are enclosed by the peripheral walls of the housing, the peripheral walls of the first and second channels.

[0007] During operation, fluid is injected into at least one of the third channel and the fourth channel. The fluid contacts the peripheral wall of the first channel to achieve the cooling function of the first channel, thereby enabling the channel to function as a cooling channel.

[0008] According to the aforementioned technical solution, the peripheral wall of the first channel can be cooled down without affecting the treatment effect of the ablation device in the first channel.

[0009] In a preferred embodiment, the fluid is injected into only one of the third and fourth channels to function as a cooling channel, while the other of the third and fourth channels functions as a suction channel.

[0010] According to the aforementioned technical solution, when the fluid pressure in the work area is too high and fluid needs to be pumped out, the non-cooling channel of the third or fourth channel can be used for pumping. Simultaneously, the pumped fluid can also provide auxiliary cooling during its return process.

[0011] In a preferred embodiment, the fluid inlet is located in the second channel, and the peripheral wall of the second channel has a through hole leading to the third and fourth channels, which function as cooling channels.

[0012] According to the aforementioned technical solution, a fluid path can be formed, including a second channel, a through-hole, and a third and / or fourth channel. The existing fluid inlet for rinsing the endoscope can be used without the need for an additional fluid inlet.

[0013] In a preferred embodiment, the second channel serves as an endoscope channel; wherein, in the longitudinal direction, the second channel is provided at a position further away from the fluid inlet than the through-hole, and at the neck, the inner diameter of the second channel is approximately equal to the outer diameter of the endoscope tubing.

[0014] According to the aforementioned technical solution, due to the necking limitation, all the fluid in the second channel enters the injection fluid channel for cooling.

[0015] In a preferred embodiment, the housing is a heat shrink tubing.

[0016] According to the aforementioned technical solution, heat shrink tubing is low in cost, easy to install, and has a certain heat insulation effect. Attached Figure Description

[0017] To more clearly illustrate this application, the accompanying drawings will be described and explained below. Obviously, the drawings described below only illustrate certain aspects of some exemplary embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0018] Figure 1 This is a longitudinal section view of the sheath device.

[0019] Figure 2 This is a cross-sectional view of Embodiment 1 of the sheath device.

[0020] Figure 3 This is a cross-sectional view of Embodiment 2 of the sheath device.

[0021] Figure 4 This is a schematic diagram of the necked structure.

[0022] Attached image caption:

[0023] 100 housing

[0024] 101 Front opening

[0025] 200 ablation devices

[0026] 300 endoscope

[0027] 1 First Channel

[0028] 10. First Channel Perimeter Wall

[0029] 2 Second Channel

[0030] 20 Second Channel Perimeter Wall

[0031] 21 First through hole

[0032] 22 Second through hole

[0033] 23. Neck retraction

[0034] 3 Third Channel

[0035] 4. Fourth Channel Detailed Implementation

[0036] Various exemplary embodiments of this application are described in detail below with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the application or its application or use. This application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise stated, the relative arrangement of components and steps, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0037] As used in this application, the words “including” or “comprising” or similar terms mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility that it may also cover other elements.

[0038] All terms used in this application (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as being interpreted with idealized or highly formalized meanings, unless explicitly defined herein.

[0039] For components, specific model numbers and other parameters of components not described in detail in this section, the interrelationships between components and control circuits, these may be considered as techniques, methods and devices known to those skilled in the art, but where appropriate, such techniques, methods and devices should be considered part of the specification.

[0040] Overall Structure

[0041] The following is for reference Figure 1-4 This application describes the structure of the sheath device. Figure 1 This is a longitudinal section view of the sheath assembly. Figure 2 This is a cross-sectional view of Embodiment 1 of the sheath device. Figure 3 This is a cross-sectional view of Embodiment 2 of the sheath device. Figure 4 This is a schematic diagram of the neck 23.

[0042] like Figure 1 , Figure 2 As shown, the sheath device of this application is configured as longitudinally elongated, including a housing 100 extending in the longitudinal direction, and a first channel 1 and a second channel 2 extending in the longitudinal direction and enclosed by the housing 100.

[0043] In typical applications, the sheath device is inserted into the human body to perform ablation on target tissue. The first channel 1 serves as a channel for the ablation device 200, which uses heat as an energy source. The ablation device 200 can be a high-temperature steam pipe or a laser ablation device, etc., which ablates lesions by spraying steam or using a laser. This application uses a high-temperature steam pipe as an example. The second channel 2 serves as a channel for the endoscope 300 to facilitate observation of the lesion. For ease of explanation, the longitudinal direction of the sheath device is defined as the axial direction, and the direction perpendicular to the axial direction is defined as the transverse or radial direction. Axially, the insertion end of the sheath device into the human body is the front end, and the side furthest from the insertion end is the rear end.

[0044] In the sheath device, an infusion port is typically provided at the inlet end of the second channel 2, through which fluid is infused into the second channel 2. The outer diameter of the tubing of the endoscope 300 is slightly smaller than the inner diameter of the second channel 2 and has a certain degree of flexibility, thus creating a gap between the peripheral wall of the second channel 2 and the tubing of the endoscope 300. The fluid flows within this gap and exits from the front end of the sheath device, thereby rinsing the endoscope 300.

[0045] like Figure 1 As shown, the insertion end of the sheath device has a front opening 101. The ablation device 200 extends from and bends through this front opening 101, spraying high-temperature steam to ablate the lesion tissue. On the other hand, since the ablation device 200 is a heat-powered device, the high temperature of the ablation device 200 can cause the temperature of the entire sheath device to rise, increasing the risk of damage to healthy tissue. Therefore, cooling is necessary. However, in the prior art, traditional water cooling involves flowing water over the surface of the heating element. While cooling, the heating element cannot effectively retain its original internal heat, thus reducing the therapeutic effect. In other words, it is desirable to minimize heat loss to ensure the ablation effect while also reducing damage to healthy tissue.

[0046] In this application, instead of directly cooling the surface of the heating element, the ablation device 200 extends into the first channel 1, cooling only the outer peripheral wall of the first channel 1 that houses the ablation device 200. This reduces the temperature of the sheath device and avoids tissue damage while minimizing the impact on the heat inside the ablation device 200, thus ensuring therapeutic efficacy. Therefore, cooling the outer peripheral wall of the first channel 1 using a fluid is conceivable.

[0047] Fluid injected into the sheath device to cool the outer peripheral wall of the first channel 1 can flow out from the front opening 101 and enter the human body. Fluid in the human body can also be drawn into the sheath device from the front opening 101 and eventually discharged from the body.

[0048] like Figure 2 As shown, the portion inside the housing 100, excluding the first channel 1 and the second channel 2, also includes a third channel 3 and a fourth channel 4.

[0049] For example, the housing 100 is a thin-walled heat shrink tubing made of a self-lubricating material. The first channel 1 and the second channel 2 are, for example, metal tubes, tightly abutting each other within the housing 100 and arranged in a figure-eight shape. The gaps formed after the housing 100 encloses the first channel 1 and the second channel 2 constitute the third channel 3 and the fourth channel 4. In other words, the third channel 3 and the fourth channel 4 do not require separate pipes; they are channels surrounded by the housing 100, the first channel 1, and the second channel 2. It should be noted that the materials of the housing 100 and the first channel 1 and the second channel 2 are not limited to these.

[0050] It is understood that the cross-sections of the first channel 1 and the second channel 2 are not limited to the circles shown in the figure. The interior of the shell 100, excluding the first channel 1 and the second channel 2, is not limited to the third channel 3 and the fourth channel 4. It can also form more channels by the gaps between them. No specific limitation is made here. Only the third channel 3 and the fourth channel 4 are used as examples for explanation.

[0051] During the procedure, the ablation device 200 is at a high temperature, and the heat is conducted to the first channel 1 peripheral wall 10 and the sheath device housing 100, causing the housing 100 to heat up, which can easily damage healthy tissue cells and increase the risk of surgery.

[0052] Therefore, during operation, this application injects fluid into at least one of the third channel 3 and the fourth channel 4. This fluid contacts the peripheral wall 10 of the first channel 1 and the housing 100, carrying away some of the heat from the first channel 1 and the housing 100. Finally, it flows into the operating area from the front opening 101 of the sheath device, thus achieving the cooling function of the first channel 1 and the housing 100. The specific fluid used for cooling is not limited here; liquid water is used as an example for illustration.

[0053] In practical use, fluid can be directly injected into at least one of the third channel 3 and the fourth channel 4, as long as the cooling function of the first channel 1 can be achieved. That is, fluid can be injected into both the third channel 3 and the fourth channel 4, or only one of the third channel 3 and the fourth channel 4. When fluid is injected into only one of the third channel 3 and the fourth channel 4, the un-injected channel can be used as a suction channel.

[0054] However, as mentioned above, in conventional sheath devices, the second channel 2 is usually used as a channel for the endoscope 300. Fluid is injected into the second channel 2 while passing through the endoscope 300 to clean the front lens of the endoscope 300.

[0055] To reduce structural complexity, this application makes a hole in the peripheral wall 20 of the second channel 2 to introduce the cleaning water in the second channel 2 into the third channel 3 and / or the fourth channel 4, which also serves as cooling water.

[0056] Specifically, such as Figure 2 As shown, in the first embodiment, the peripheral wall 20 of the second channel 2 is provided with a first through hole 21 and a second through hole 22 leading to the third channel 3 and the fourth channel 4, respectively. During operation, the third channel 3 and the fourth channel 4 both serve as channels for injecting fluid. That is, water injected from the second channel 2 enters the third channel 3 through the first through hole 21 and the fourth channel 4 through the second through hole 22. It flows in the third channel 3 and the fourth channel 4 and carries away some of the heat from the first channel 1 and the shell 100. Finally, it flows out from the front opening 101 of the sheath device, thus achieving the cooling function of the first channel 1 and the shell 100.

[0057] In this embodiment, when there is a large amount of liquid and high pressure in the working area, the infusion can be stopped, and the third channel 3 and the fourth channel 4 can be used as suction fluid channels to extract the excess liquid in the working area before continuing the ablation operation.

[0058] like Figure 3 As shown, in the second embodiment, the second channel 20 of the second channel 2 is provided with a through hole leading to one of the third channel 3 and the fourth channel 4; the through hole connects one of them as an injection fluid channel and the other as a suction fluid channel.

[0059] For example, suppose the peripheral wall 20 of the second channel has a first through hole 21 leading to the third channel 3, while the second channel 2 and the fourth channel 4 are not connected. Thus, the third channel 3 is used as the injection fluid channel, and the fourth channel 4 is used as the suction fluid channel.

[0060] That is, the fluid in the second channel 2 enters the third channel 3 through the first through hole 21, flows in the third channel 34 and carries away some of the heat from the first channel 1 and the shell 100, and finally flows out from the front opening 101 of the sheath device, thus achieving the cooling function of the first channel 1 and the shell 100. When there is a lot of liquid and the pressure is high in the working area, the fourth channel 4 can be used as a suction fluid channel to remove excess liquid from the working area without stopping the ablation operation and the infusion fluid cooling, ensuring the continuity of the operation.

[0061] like Figure 4 As shown, as a preferred embodiment, a neck 23 is provided on the side of the second channel 2 closer to the front end than the aforementioned through holes (first through hole 21, second through hole 22) in the axial direction. At the neck 23, the inner diameter of the second channel 2 is approximately equal to the outer diameter of the endoscope 300.

[0062] After the endoscope 300 is inserted into the second channel 2, the gap between the inner wall of the second channel 2 and the endoscope 300 at the neck 23 is eliminated, preventing fluid from passing through. This allows all the fluid in the second channel 2 to flow out through the through-hole to the gap between the second channel 2 and the housing 100, achieving a better cooling effect. It can be understood that when there are two through-holes, a portion of the fluid in the second channel 2 enters the third channel 3, and the remainder enters the fourth channel 4. When there is only one through-hole, all the fluid in the second channel 2 enters the irrigation fluid channel connected to that through-hole.

[0063] It should be noted that when the third channel 3 and / or the fourth channel 4 serve as irrigation fluid channels, the fluid within the channels can also clean the front lens of the endoscope 300 as it eventually flows out from the front opening 101 of the sheath device. Furthermore, the aforementioned through holes are not limited to the first through hole 21 and the second through hole 22 shown in the figure; each side can have a set of through holes spaced apart. Here, only the first through hole 21 and the second through hole 22 are used as examples for explanation.

[0064] Therefore, this application enables the cleaning fluid used to clean the endoscope 300 to also be used as a cooling fluid to cool the heat of the ablation device 200 without affecting the cleaning of the endoscope 300.

[0065] In summary, the sheath device of this application consists of two metal tubes (first channel 1 and second channel 2) that do not require high machining precision and a heat-shrink tubing (shell 100). It is low-cost, space-efficient, and has a small outer circumference. Furthermore, by simply opening a through-hole on the side of the conventional endoscope channel, cleaning water from the endoscope channel can be introduced into the gap within the shell 100, achieving a cooling function for both the first channel 1 and the shell 100. In experiments, the temperature was reduced to below 50 degrees Celsius. This reduces structural complexity and manufacturing difficulty while still providing cleaning functionality for the endoscope lens 300.

[0066] Furthermore, traditional fluid cooling involves directly flowing fluid over the outer surface of the heating element, i.e., the ablation device 200, to lower the temperature. However, this method fails to effectively retain the original internal heat, thus reducing the therapeutic effect. Another common cooling method is to add a sheath outside the first channel 1, introducing fluid or adding insulation material between the sheath and the first channel 1 to prevent the high temperature inside the first channel 1 from being transferred to the sheath device's housing 100, thereby reducing surgical risks. However, this increases the outer circumference of the sheath device, and a larger outer circumference increases the risk of additional injury to the patient.

[0067] This application reduces the heat in the first channel 1 while maintaining stable internal heat of the ablation device 200 within the first channel 1, ensuring the effectiveness of high-temperature ablation treatment while preventing burns to healthy tissue from the sheath device. Furthermore, this application eliminates the need for additional cannula or insulation layers, reducing the outer circumference of the sheath device.

[0068] It should be understood that the specific embodiments described above are only used to explain this application, and the scope of protection of this application is not limited thereto. Any changes, substitutions, or combinations made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be covered within the scope of protection of this application.

Claims

1. A sheath device, configured as longitudinally elongated, characterized in that, It includes a shell extending in the longitudinal direction, and a first channel and a second channel extending in the longitudinal direction enclosed by the shell; wherein the first channel serves as an ablation device channel; The portion inside the housing, excluding the first and second channels, also includes a third and a fourth channel, both of which are enclosed by the peripheral walls of the housing, the peripheral walls of the first and second channels. During operation, fluid is injected into at least one of the third channel and the fourth channel. The fluid contacts the peripheral wall of the first channel to achieve the cooling function of the first channel, thereby enabling the channel to function as a cooling channel.

2. The sheath device according to claim 1, characterized in that, The fluid is injected into only one of the third and fourth channels to function as a cooling channel, while the other of the third and fourth channels functions as a suction channel.

3. The sheath device according to claim 1 or 2, characterized in that: The fluid inlet is located in the second channel, and the peripheral wall of the second channel has a through hole that leads to the third and fourth channels and functions as a cooling channel.

4. The sheath device according to claim 3, characterized in that, The second channel is used as an endoscope channel; In the longitudinal direction, a neck is provided in the second channel at a position further away from the fluid inlet than the through hole, and at the neck, the inner diameter of the second channel is approximately equal to the outer diameter of the endoscope tubing.

5. The sheath device according to claim 1, characterized in that, The shell is a heat shrink tubing.

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