Kidney fistulization tube

Abstract

The utility model provides a nephrostomy tube, and belongs to the technical field of medical instruments. The nephrostomy tube is provided with a catheter and an air bag, the catheter is provided with a guide channel, the air bag is installed on the catheter, the air bag is provided with an inflation cavity, the inflation cavity is arranged around the guide channel, the air bag is provided with an inflation inlet communicated with the inflation cavity, the inflation inlet is used for receiving external air to expand the air bag, and at least part of the inner wall of the inflation cavity is provided with protrusions. The bulges are supported between the inner layer and the outer layer of the air bag, so that the inner layer and the outer layer are prevented from being completely adhered together, and the adhesion acting force between the inner layer and the outer layer is reduced, so that the outer layer and the inner layer of the air bag can be quickly separated under the condition that the air inflation opening of the air bag receives external air, and the air inflation cavity can be quickly filled with the air; the air bag can be quickly and uniformly expanded, and the situation that the outer layer of the air bag is locally and excessively expanded due to stress concentration of the outer layer of the air bag is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a nephrostomy tube. Background Art

[0002] Nephrostomy drainage is a procedure that involves puncturing or incising the renal parenchyma to insert a catheter into the renal pelvis to drain urine, pus, blood, and facilitate the formation of a sinus tract. Nephrostomy drainage typically requires the use of a nephrostomy tube.

[0003] Currently, a nephrostomy tube can be equipped with an airbag at one end. By inflating the airbag, the airbag expands, providing fixation and hemostasis. However, in existing technologies, the airbag expands unevenly, which can lead to stress concentration on the airbag wall, affecting the fixation and hemostasis effects of the airbag. Utility Model Content

[0004] The purpose of this application is to provide a nephrostomy tube to solve the above-mentioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] An embodiment of the present application provides a nephrostomy tube, which has a catheter and an airbag, wherein: the catheter has a guide channel, the airbag is installed on the catheter, the airbag has an inflation cavity, the inflation cavity is arranged around the guide channel, the airbag has an inflation port connected to the inflation cavity, the inflation port is used to receive external gas to inflate the airbag, and at least part of the inner wall of the inflation cavity is provided with a protrusion.

[0007] The technical solution provided by this application can achieve the following beneficial effects:

[0008] In this application, a protrusion is provided on the inner wall of the inflation cavity. The protrusion is used to support the outer layer of the airbag and the inner layer of the airbag, thereby preventing the inner and outer layers from completely adhering to each other. In this way, even if the airbag is not inflated, the inflation cavity between the outer and inner layers of the airbag can be partially filled with gas, thereby reducing the adhesion force between the outer and inner layers of the airbag. When the inflation port of the airbag receives external gas, the outer and inner layers of the airbag can quickly separate, and the gas can quickly fill the inflation cavity. In addition, because the inflation cavity is inflated, the airbag can quickly reach the area of the inflation cavity away from the inflation port, thereby avoiding stress concentration on the outer layer of the airbag, which can cause localized excessive expansion. Therefore, this solution is beneficial to the uniform inflation of the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention 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.

[0010] Figure 1 is a schematic structural diagram of a nephrostomy tube with an uninflated balloon provided in some embodiments of the present application;

[0011] Figure 2 is a cross-sectional view of a nephrostomy tube with an uninflated balloon provided in some embodiments of the present application;

[0012] Figure 3 It's about Figure 2 Detailed view of point A;

[0013] Figure 4 is a schematic structural diagram of a balloon-expanded nephrostomy tube provided in some embodiments of the present application;

[0014] Figure 5 is a cross-sectional view of a balloon-inflated nephrostomy tube provided in some embodiments of the present application;

[0015] Figure 6 It's about Figure 5 Detail of point B.

[0016] In the figure: 100 - catheter, 110 - guide channel, 200 - airbag, 210 - inflation cavity, 220 - inflation port, 230 - protrusion, 240 - air flow channel, 250 - inner layer, 260 - outer layer, 300 - inflation channel, 400 - one-way valve. DETAILED DESCRIPTION

[0017] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only examples, not to limit the present invention.

[0018] In each embodiment of the present application, "proximal" and "distal" refer to the position of the nephrostomy tube relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal" and the end farther from the user is designated as the "distal".

[0019] The present application embodiment provides a nephrostomy tube, referring to Figures 1 to 6As shown, the nephrostomy tube has a catheter 100 and a balloon 200. The catheter 100 has a guide channel 110, which is mainly used for draining liquid. The balloon 200 is installed on the catheter 100 and is generally located at the distal end of the catheter 100. Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the airbag 200 has an inflation chamber 210 for containing gas, and the inflation chamber 210 is arranged around the guide channel 110. The airbag 200 has an inflation port 220 communicating with the inflation chamber 210, and the inflation port 220 is used to receive external gas to expand the airbag 200.

[0020] When the airbag 200 expands and its size increases, it can no longer exit through the opening it entered. Therefore, the expanded airbag 200 can secure the entire nephrostomy tube within the human body, preventing the tube from escaping under the influence of gravity. Furthermore, the expansion of the airbag 200 can reduce the gap between it and the wall of the human tissue cavity until the airbag 200 presses against the human tissue. This compression of the tissue by the airbag 200 can achieve a hemostatic effect. Furthermore, because the inflation chamber 210 surrounds the guide channel 110, the airbag 200 expands evenly around the circumference of the guide channel 110. The expanded airbag 200 also provides a more even fixation effect on the catheter 100 around the circumference of the guide channel 110, further stabilizing the position of the nephrostomy tube.

[0021] At least part of the inner wall of the inflation cavity 210 is provided with a protrusion 230, and the protrusion 230 supports the inner layer 250 of the airbag 200 and the outer layer 260 of the airbag 200. Figure 3 and Figure 6 As shown. The inner layer 250 of the airbag 200 is arranged closer to the guide channel 110, and the outer layer 260 of the airbag 200 covers the outside of the inner layer 250 and is connected to the inner layer 250 to form an inflation cavity 210. The outer layer 260 is generally provided with an elastic material that can be stretched to achieve the expansion of the airbag 200. The surface of the inner layer 250 close to the outer layer 260 and the surface of the outer layer 260 close to the inner layer 250 are the inner walls of the airbag 200. The protrusion 230 is provided on at least part of the inner wall. Due to the presence of the protrusion 230, the inner layer 250 and the outer layer 260 of the airbag 200 will not be completely adhered together. Between the inner layer 250 and the outer layer 260, even if the airbag 200 is in an unexpanded state, refer to Figure 3 As shown, the inflation cavity 210 can also be partially filled with gas, thereby reducing the adhesion force between the inner layer 250 and the outer layer 260 of the airbag 200 .

[0022] Therefore, when the inflation port 220 of the airbag 200 begins to receive external gas, after the gas enters the inflation cavity 210, the gas can quickly fill the inflation cavity 210 due to the weak adhesion force between the inner layer 250 and the outer layer 260. Since the gas can quickly fill the inflation cavity 210, the gas can quickly reach the area of the inflation cavity 210 away from the inflation port 220, thereby preventing the gas from concentrating in the area of the inflation cavity 210 near the inflation port 220, which would cause stress concentration in the outer layer 260 of the airbag 200 and lead to localized excessive expansion of the outer layer 260 of the airbag 200. This is beneficial to the rapid and uniform inflation of the airbag 200.

[0023] In some embodiments of the present application, the protrusions 230 may be dot-shaped protrusions 230, with multiple protrusions 230 distributed on the inner wall of the airbag 200. The protrusions 230 are relatively independent of each other. While the protrusions 230 support the inner layer 250 and outer layer 260 of the airbag 200, the protrusions 230 do not hinder the flow of gas, allowing the gas to flow quickly to various areas of the inflation chamber 210. In other embodiments of the present application, the protrusions 230 may also be strip-shaped protrusions 230, which can restrict the flow direction of the gas, causing the gas to flow along the extension direction of the strip-shaped protrusions 230. The strip-shaped protrusions 230 can restrict the flow direction of the gas, allowing the gas to quickly reach a predetermined location.

[0024] In some preferred embodiments, the strip-shaped protrusions 230 are arranged around the guide channel 110, and in the axial direction of the guide channel 110, an air flow channel 240 for gas to pass through is formed between two adjacent protrusions 230. Figure 3 and Figure 6 The inflation cavity 210 is arranged around the guide channel 110. After the gas enters the inflation cavity 210 through the inflation port 220, it can quickly reach the other side of the inflation port 220 through the airflow channel 240 formed by the two adjacent protrusions 230. This allows the airbag 200 to expand rapidly in the circumferential direction of the guide channel 110, further alleviating the situation where a local area of the airbag 200 expands first, and can make the airbag 200 expand more evenly.

[0025] Further preferably, the plane where the protrusion 230 is located is arranged parallel to the cross-section of the guide channel 110, so that the length of the airflow channel 240 is as short as possible, thereby ensuring that the gas can reach the other side of the inflation port 220 more quickly, further increasing the expansion speed of the airbag 200 and enhancing the expansion effect of the airbag 200.

[0026] In some further preferred embodiments, multiple protrusions 230 are evenly distributed along the axial direction of the guide channel 110. With such a layout, the size of the airflow channel 240 formed between any two adjacent protrusions 230 is equal. During the expansion of the airbag 200, the airbag 200 expands more evenly along the axial direction of the guide channel 110. Specifically, on both sides of the inflation port 220, the closer to the inflation port 220, the better the expansion effect of the airbag 200, and the farther away from the inflation port 220, the worse the expansion effect of the airbag 200. The difference in the expansion effect of the airbag 200 at different positions is beneficial to making the airbag 200 closer to a spherical shape after expansion, which is beneficial to improving the fixation effect and compression hemostasis effect of the airbag 200.

[0027] refer to Figure 3 As shown, along the axial direction of the inflation port 220, the projection of the inflation port 220 is located within at least two airflow channels 240. Gas entering through the inflation port 220 can simultaneously enter the at least two airflow channels 240 corresponding to the inflation port 220, and flow through the at least two airflow channels 240 to the other side of the inflation port 220, thereby inflating the airbag 200. With this layout, the gas entering from the inflation port 220 is distributed within the at least two airflow channels 240, increasing the gas diffusion area, thereby allowing the airbag 200 to inflate more evenly. Furthermore, the inflation port 220 corresponds to at least two airflow channels 240 at the same time, which can avoid the situation where the inflation port 220 is too small and the protrusion 230 is too large, resulting in the protrusion 230 directly blocking the inflation port 220 and preventing gas from entering the airbag 200, thereby ensuring that gas can enter the airbag 200 smoothly and quickly.

[0028] The inflation port 220 can be set in the proximal area of the airbag 200, or in the distal area of the airbag 200. In some preferred embodiments, the inflation port 220 is set in the middle of the airbag 200. The middle of the airbag 200 refers to the area corresponding to the midpoint of the airbag 200 along the axial direction of the guide channel 110. The axis of the inflation port 220 can pass through the midpoint of the airbag 200. The inflation port 220 is in the middle of the airbag 200. During the inflation process, the filling efficiency of the gas to the airbag 200 located in front of the inflation port 220 and the airbag 200 located behind the inflation port 220 is almost the same. In this way, the expansion efficiency and expansion effect of the proximal and distal ends of the airbag 200 can be ensured to be almost the same, which is beneficial to the symmetry of the inflated airbag 200 along the cross section of the guide channel 110, and improves the fixation and compression hemostasis effect of the airbag 200.

[0029] In some embodiments, the protrusions 230 may be provided on the inner layer 250 of the airbag 200, on the outer layer 260 of the airbag 200, or on both the inner layer 250 and the outer layer 260. In other embodiments, the protrusions 230 may be provided only on portions of the inner layer 250 and / or the outer layer 260, or may cover the entire inner layer 250 and / or the outer layer 260. The density of the protrusions 230 should not be too high to prevent excessive obstruction of the normal flow of gas. At the same time, the density of the protrusions 230 should not be too low. A too low density may result in excessive gaps between adjacent protrusions 230, weakening the support provided to the inner layer 250 and the outer layer 260. The inner layer 250 and the outer layer 260 between adjacent protrusions 230 may easily adhere to each other, obstructing the flow of gas.

[0030] The outer layer 260 of the airbag 200 is generally an elastic structural member made of an elastic material. It deforms under tension and recovers upon removal of the external force, allowing it to expand under the action of gas. As the outer layer 260 expands, its area increases, and the thickness of the airbag 200 decreases, resulting in a decrease in the structural strength of the airbag 200. In some preferred embodiments, the protrusions 230 are provided on at least the outer layer 260 of the airbag 200 to enhance the structural strength and compressive resistance of the outer layer 260. During use, even if the airbag 200 is compressed by human tissue, the airbag 200 is not easily damaged or deformed, which helps the airbag 200 to have a more spherical shape after expansion.

[0031] The balloon 200 includes an inner layer 250 and an outer layer 260. The inflation port 220 can be located in either the inner layer 250 or the outer layer 260. In some preferred embodiments, the inflation port 220 is generally located in the inner layer 250. The position and structure of the inner layer 250 relative to the outer layer 260 can remain stable, and the shape of the inflation port 220 generally does not change. Furthermore, since the inflation port 220 is located in the inner layer 250, the inflation channel 300 communicating with the inflation port 220 can be positioned close to the catheter 100 to prevent the inflation channel 300 from being connected to the outer layer 260. This would prevent the position of the inflation channel 300 from changing after the outer layer 260 is inflated, which could affect the normal use of the nephrostomy tube.

[0032] In some preferred embodiments, the outer layer 260 of the airbag 200 covers the circumferential sidewalls of the catheter 100 and is integrally formed with the catheter 100, while the inner layer 250 of the airbag 200 is directly formed from a portion of the catheter 100 wall. In this arrangement, the inner layer 250 of the airbag 200 and the portion of the catheter 100 wall are configured as the same component, which simplifies the structure of the airbag 200. The outer layer 260 of the airbag 200 is integrally formed with the catheter 100, which helps to improve the connection stability between the outer layer 260 and the catheter 100. During the use of the nephrostomy tube, it is best to maintain the outer surface of the catheter 100 flat and smooth to reduce the resistance to insertion of the catheter 100 into the human body. Further preferably, the surface of the outer layer 260 of the airbag 200 is flush with the circumferential sidewalls of the catheter 100 to ensure the smooth outer surface of the nephrostomy tube.

[0033] An inflation channel 300 is provided on the tube wall of the catheter 100 . The inflation channel 300 is communicated with the inflation port 220 . The end of the inflation channel 300 away from the airbag 200 is used to connect to an external air source.

[0034] The inflation port 220 of the airbag 200 is connected to the inflation channel 300, and the end of the inflation channel 300 away from the inflation port 220 is connected to the inflation device. In order to reduce the impact of the inflation channel 300 on the appearance of the nephrostomy tube and the impact of the inflation channel 300 on the use effect of the nephrostomy tube, the inflation channel 300 is preferably provided on the tube wall of the catheter 100, without the need to separately provide a pipe outside the catheter 100 to connect the airbag 200 and the inflation device. Figure 3 and Figure 6 shown.

[0035] In some embodiments, the inflation port 220 may be provided at the end of the inflation channel 300. In other embodiments, the inflation port 220 may be located at the circumferential side wall of the inflation channel 300. When the inflation port 220 is provided at the end of the inflation channel 300, the gas is less restricted and the gas will diffuse rapidly along the axial direction of the inflation channel 300. Compared with when the inflation port 220 is provided at the end of the inflation channel 300, when the inflation port 220 is provided at the circumferential side wall of the inflation channel 300, the gas is restricted by the boundary, and the gas forms a ring or spiral shape along the inner wall surface of the inflation channel 300. The ejected gas is more dispersed and has a larger diffusion range. The larger the diffusion range of the gas, the faster it can be dispersed into the inflation cavity 210 after entering the inflation cavity 210 through the inflation port 220, thereby improving the distribution range of the gas in the inflation cavity 210, thereby improving the uniformity of the gas inflation of the airbag 200, which is beneficial to the uniform expansion of the airbag 200.

[0036] A one-way valve 400 is provided at a portion of the inflation channel 300 away from the airbag 200. Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the one-way valve 400 is used for one-way ventilation. When the inflation channel 300 is inflated with gas, the one-way valve 400 opens, allowing the gas to quickly enter the inflation channel 300. Once the gas enters the inflation channel 300, the restrictive effect of the one-way valve 400 prevents it from escaping from the one-way valve 400 into the external environment, thereby maintaining the inflation effect of the airbag 200. In practice, to prevent the installation of the one-way valve 400 from interfering with the normal drainage function of the guide channel 110, two branches are typically formed at the proximal end of the catheter 100. The guide channel 110 extends toward one of the branches, and the inflation channel 300 extends toward the other branch. The one-way valve 400 is installed in the corresponding branch of the inflation channel 300 without interfering with the normal function of the guide channel 110.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A nephrostomy tube, characterized in that: The nephrostomy tube comprises a catheter (100) and a balloon (200), wherein: The catheter (100) has a guide channel (110), the airbag (200) is installed on the catheter (100), the airbag (200) has an inflation cavity (210), the inflation cavity (210) is arranged around the guide channel (110), the airbag (200) has an inflation port (220) connected to the inflation cavity (210), the inflation port (220) is used to receive external gas to inflate the airbag (200), and at least part of the inner wall of the inflation cavity (210) is provided with a protrusion (230).

2. A nephrostomy tube according to claim 1, characterized in that: The protrusions (230) are arranged around the guide channel (110), and in the axial direction of the guide channel (110), an air flow channel (240) for gas to pass through is formed between two adjacent protrusions (230).

3. A nephrostomy tube according to claim 2, characterized in that: The plurality of protrusions (230) are evenly distributed in the axial direction of the guide channel (110).

4. A nephrostomy tube according to claim 2, characterized in that: Along the axial direction of the inflation port (220), a projection surface of the inflation port (220) is located within at least two of the air flow channels (240).

5. A nephrostomy tube according to claim 1, characterized in that: Along the axial direction of the guide channel (110), the inflation port (220) is located in the middle of the airbag (200).

6. A nephrostomy tube according to claim 1, characterized in that: The airbag (200) includes an inner layer (250) and an outer layer (260), wherein the inflation cavity (210) is formed between the inner layer (250) and the outer layer (260), the inner layer (250) is closer to the guide channel (110) than the outer layer (260), the outer layer (260) is an elastic structural component, the inflation port (220) is arranged on the inner layer (250), and the protrusion (230) is arranged on the outer layer (260).

7. A nephrostomy tube according to claim 6, characterized in that: The outer layer (260) of the airbag (200) covers the circumferential side wall of the catheter (100) and is integrally formed with the catheter (100); the inner layer (250) of the airbag (200) is formed by a portion of the tube wall of the catheter (100).

8. A nephrostomy tube according to claim 1, characterized in that: The tube wall of the catheter (100) is provided with an inflation channel (300), the inflation channel (300) is communicated with the inflation port (220), and the end of the inflation channel (300) away from the airbag (200) is used for connecting to an external air source.

9. A nephrostomy tube according to claim 8, characterized in that: The inflation port (220) is located at a circumferential side wall of the inflation channel (300).

10. A nephrostomy tube according to claim 8, characterized in that: A one-way valve (400) is provided at a portion of the inflation channel (300) away from the airbag (200).

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