Nasobiliary drainage tube

Abstract

The utility model provides a nasobiliary drainage tube which comprises a first drainage tube which can be independently used for internal drainage and a second drainage tube which is connected with the first drainage tube to achieve external drainage, at least one retaining ring is arranged at the near end of the first drainage tube, the retaining rings are sequentially sleeved and fixedly connected with the first drainage tube, and a drainage hole is formed in the far end of the first drainage tube; at least one first groove is sequentially formed in the periphery of the far end of the second drainage tube, and each edge part of the first groove is arc-shaped; the nasobiliary tube cutting device is simple in structure and easy to operate, an external drainage nasobiliary tube can be directly cut into an internal drainage tube, a cut is provided with a fillet, tissue cannot be punctured, meanwhile, the drainage tube can be prevented from shifting by arranging the retaining ring, and damage to duodenum puncture is avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a nasobiliary drainage tube. Background Technology

[0002] Over the past 50 years since its invention, endoscopy has evolved from disease diagnosis to disease treatment, and has become highly effective and reliable in treating some diseases. For lesions in the bile duct and other areas, a common method is endoscopic nasobiliary drainage (ENBD). This involves draining bile through a nasobiliary drainage tube to the outside for analysis, then removing the entire long nasobiliary drainage tube. A shorter drainage tube is then inserted into the bile duct at one end, leaving the other end in the duodenum, to dilate the obstructed bile duct and drain bile and other digestive fluids. Alternatively, the doctor can use the endoscopic forceps channel to insert instruments and disconnect the drainage tube located outside the duodenal papilla, converting external bile duct drainage into internal drainage.

[0003] Current methods for converting external bile duct drainage to internal drainage typically involve trimming the nasobiliary drainage tube into an internal drainage tube using scissors after inserting the endoscope. This results in a sharp incision that can easily puncture the duodenum, posing a risk of perforation. Based on these issues, there is an urgent need for an improved structure for the nasobiliary drainage tube. Utility Model Content

[0004] The purpose of this invention is to provide a nasobiliary drainage tube with a simple structure and easy operation. It can directly cut an externally draining nasobiliary tube into an internal drainage tube. The incision has rounded corners to avoid puncturing tissue. At the same time, a stop ring is set to prevent the drainage tube from shifting and avoid damage to the duodenum.

[0005] According to one aspect of the present invention, a nasobiliary drainage tube is provided, comprising a first drainage tube that can be used alone for internal drainage, and a second drainage tube connected to the first drainage tube for external drainage. The proximal end of the first drainage tube is provided with at least one anti-reverse ring, which is sequentially fitted and fixedly connected to the first drainage tube. The distal end of the first drainage tube is provided with a drainage hole. At least one first groove is sequentially provided on the outer periphery of the distal end of the second drainage tube, and each edge of the first groove is arc-shaped.

[0006] Preferably, at least one second groove is sequentially provided on the outer periphery of the proximal end of the first drainage tube. The second groove is located on the rear side of the anti-reverse ring, and each edge of the second groove is arc-shaped.

[0007] Preferably, the first drainage tube and the second drainage tube are designed as an integrated unit.

[0008] Preferably, the anti-reverse ring is a ring structure or a C-shaped structure.

[0009] Preferably, the anti-reverse ring is made of plastic material.

[0010] Preferably, the length of the first drainage tube is 8-12cm, and the length of the second drainage tube is 150-240cm.

[0011] Preferably, the first drainage tube and the second drainage tube are circular hollow tubular structures, and the outer diameter of the first drainage tube and the second drainage tube is 5Fr-10Fr.

[0012] This utility model has a simple structure and is easy to operate. It can directly cut the external drainage nasobiliary duct into an internal drainage tube. The incision has rounded corners so as not to puncture the tissue. At the same time, the anti-retraction ring can prevent the drainage tube from shifting and avoid damage to the duodenum. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present utility model.

[0014] Figure 2 This is an enlarged view of part of the structure of the second drainage tube;

[0015] Figure 3 This is an enlarged view of part of the structure of the first drainage tube;

[0016] Figure 4 This is an enlarged cross-sectional view of part of the structure of the first drainage tube;

[0017] Figure 5 This is an enlarged cross-sectional view of part of the structure of the second drainage tube. Detailed Implementation

[0018] To facilitate understanding of this application and to make the aforementioned objectives, features, and advantages of this application more apparent, a detailed description of specific embodiments of this application is provided below in conjunction with the accompanying drawings. Numerous specific details are set forth in the following description to provide a thorough understanding of this application, and preferred embodiments are shown in the accompanying drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application. This application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly specified. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise expressly specified. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can also refer to the internal connection between two components.

[0021] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0022] For ease of description, in this instruction, the end of the second drainage tube furthest from the operator during use is defined as the distal end, or the front end, while the end held by the operator is defined as the proximal end, or the rear end.

[0023] See Figure 1-3As shown, the nasobiliary drainage tube of this utility model includes a first drainage tube 1 that can be used alone for internal drainage, and a second drainage tube 2 that is connected to the first drainage tube 1 to realize external drainage. The proximal end of the first drainage tube 1 is provided with at least one anti-retraction ring 3, and the anti-retraction ring 3 is sequentially fitted and fixedly connected to the first drainage tube 1. The distal end of the first drainage tube 1 is provided with a drainage hole 11. At least one first groove 4 is sequentially provided on the outer periphery of the distal end of the second drainage tube 2, and each edge of the first groove 4 is arc-shaped. When the nasobiliary drainage tube of this invention is used as an external drainage tube, the first drainage tube 1 is inserted into the bile duct, and the second drainage tube 2 is led out from the nasal cavity along the upper digestive tract. At this time, bile can be drained from the body to the outside. After several days, when it is necessary to drain bile into the duodenum, it is cut with scissors at the first groove 4 through the endoscopic channel, and the second drainage tube 2 is slowly pulled out of the upper digestive tract. The first drainage tube 1 remains in the body. The first drainage tube 1 inserted in the body serves as an internal drainage tube. The anti-retraction ring 3 of the first drainage tube 1 is fixed at the duodenal papilla, and the proximal end of the first drainage tube 1 remains in the duodenum. At this time, bile can be drained into the duodenum. This utility model has a simple structure and is easy to operate. It allows for simple and safe operation, enabling both external drainage of bile to the outside and internal drainage of bile into the duodenum via a directly cut nasobiliary duct, eliminating the need for secondary surgery. This facilitates surgical procedures and reduces costs and risks. The edges of the first groove 4 are all smooth arcs, preventing sharp cuts and ensuring a rounded incision that won't irritate the duodenum. Furthermore, the first drainage tube 1 has a stop ring to prevent displacement and avoid damage to the duodenum. Multiple first grooves 4 allow for the cutting of internal drainage tubes of varying lengths according to the needs of different patients during surgery, broadening its applicability.

[0024] At least one second groove 5 is sequentially arranged on the outer periphery of the proximal end of the first drainage tube 1. The second groove 5 is located behind the anti-retraction ring 3, and all edges of the second groove 5 are arc-shaped. Multiple second grooves 5 can be provided, allowing the tube to be cut at the second groove 5 using scissors through the endoscopic cavity to achieve different lengths of internal drainage tube as needed, depending on the patient. The first drainage tube 1 and the second drainage tube 2 are designed as a single unit. The anti-retraction ring 3 is a ring structure or a C-shaped structure, simplifying the manufacturing process. The anti-retraction ring 3 is made of plastic material, such as medical-grade polyethylene or medical-grade silicone. The length of the first drainage tube is 8-12 cm, and the length of the second drainage tube is 150-240 cm, which meets usage requirements without significant excess length. The first drainage tube 1 and the second drainage tube 2 are circular hollow tubular structures with an outer diameter of 5Fr-10Fr. The diameter of the drainage tube is selected according to the situation; tubes with an outer diameter of 5Fr-10Fr are suitable for most patients.

[0025] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the invention. Therefore, it is intended that this invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A nasobiliary drainage tube, characterized in that: It includes a first drainage tube (1) that can be used alone for internal drainage, and a second drainage tube (2) that is connected to the first drainage tube (1) to realize external drainage. The proximal end of the first drainage tube (1) is provided with at least one anti-reverse ring (3), and the anti-reverse ring (3) is sequentially fitted and fixedly connected to the first drainage tube (1). The distal end of the first drainage tube (1) is provided with a drainage hole (11). The outer periphery of the distal end of the second drainage tube (2) is sequentially provided with at least one first groove (4), and each edge of the first groove (4) is arc-shaped.

2. The nasobiliary drainage tube as described in claim 1, characterized in that: At least one second groove (5) is sequentially provided on the outer periphery of the proximal end of the first drainage tube (1). The second groove (5) is located on the rear side of the anti-reverse ring (3), and each edge of the second groove (5) is arc-shaped.

3. The nasobiliary drainage tube as described in claim 1, characterized in that: The first drainage tube (1) and the second drainage tube (2) are designed as an integrated unit.

4. The nasobiliary drainage tube as described in claim 2, characterized in that: The anti-reverse ring (3) is a ring structure or a C-shaped structure.

5. The nasobiliary drainage tube as described in claim 2, characterized in that: The anti-reverse ring (3) is made of plastic material.

6. The nasobiliary drainage tube as described in claim 3, characterized in that: The length of the first drainage tube (1) is 8-12 cm, and the length of the second drainage tube (2) is 150-240 cm.

7. The nasobiliary drainage tube as described in claim 3, characterized in that: The first drainage tube (1) and the second drainage tube (2) are circular hollow tubular structures, and the outer diameter of the first drainage tube (1) and the second drainage tube (2) is 5Fr-10Fr.

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