Double-layer nasobiliary drainage tube capable of effectively protecting tissues

Abstract

The utility model discloses a double-layer nasobiliary drainage tube capable of effectively protecting tissues, which comprises an inlet end part at the front end of the nasobiliary drainage tube, which firstly enters a human body, and an elastic tubular supporting tube structure with elasticity, and meshes or first drainage holes which are not smaller than drainage holes are arranged on the elastic supporting tube structure corresponding to the drainage hole area; the flexible tube structure is attached to the outer side of the elastic supporting tube structure, or the elastic supporting tube is embedded in the flexible tube structure, the flexible tube structure is made of flexible rubber materials, the flexible rubber materials include but not limited to related medical flexible materials such as silica gel materials and latex materials, and the elastic supporting tube structure is made of memory alloy fibers. The memory alloy fibers are nickel-titanium memory alloy fibers or other alloy fibers; in addition, the drainage tube is connected with a three-way connector capable of adjusting an open passage. Through the arrangement, it is guaranteed that the soft pipe structure provides direct contact protection; the elastic supporting tube structure provides elastic buffer protection, reduces damage to tissues, and can also ensure the safety of leading-out and leading-in of liquid.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical devices, especially to the field of nasobiliary drainage tube, concretely to a double-layer nasobiliary drainage tube capable of effectively protecting tissues. BACKGROUND

[0002] Endoscopic retrograde cholangiopancreatography (ERCP) is a technique that uses X-ray to show the structure of the pancreatic and bile ducts after injecting contrast medium through a duodenoscope, and thus can diagnose and treat diseases such as common bile duct stones. Most patients need to place a nasobiliary tube after ERCP to drain the accumulated bile and / or sand-like stones to the outside of the body to prevent the blockage of the bile duct or pancreatic duct.

[0003] The nasobiliary drainage tube of the prior art has a relatively hard structure, and when it enters the drainage area after the operation through a guide wire, it is easy to cause damage to the tissues during the entering process due to the hard texture of the nasobiliary drainage tube. This increases the discomfort of the patient and may even cause damage to the bile duct wall, the upper digestive tract mucosa, the pharyngeal mucosa, and the nasal mucosa.

[0004] In addition, the injection of contrast medium, the administration of drugs to the bile duct, and the injection of related liquids such as bile duct flushing are often required in clinical practice. The current nasobiliary drainage tube is temporarily separated from the drainage bag and connected to injection equipment to complete the injection of the corresponding drugs, which undoubtedly increases the difficulty of operation and the risk of infection. At the same time, most of the existing nasobiliary drainage tubes lack a protective structure for the tissues in the front segment, which may lead to adverse consequences such as bile duct wall perforation and leakage of contrast medium.

[0005] The utility model provides a double-layer nasobiliary drainage tube capable of effectively protecting tissues to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0006] The current nasobiliary drainage tube is mostly made of polyethylene, polycarbonate, or other polymer materials. The nasobiliary drainage tube made of such materials is hard in texture and is mostly inserted into the surgical site through a duodenoscope. However, it is difficult to enter the appropriate bile duct position without the guidance of a duodenoscope, and the hard texture may also cause damage to the tissues in the entering path during the entering process. Therefore, a nasobiliary drainage tube with elasticity and softness is provided to ensure that it does not cause damage to the tissues in the entering path when it enters the drainage area under the guidance of a guide wire.

[0007] It is specifically contemplated that by improving at least the entering end part of the nasobiliary drainage tube, the part is improved into a tubular structure with a double-layer structure, the inner layer has a certain elasticity, which is an elastic layer, but the outer layer is attached to the outside of the inner layer, which is a layer of soft material. Through the setting of the two layers, it can be ensured that during the entering process of the drainage tube, the outer layer provides direct contact protection, and the elastic layer provides elastic buffer protection. When the resistance is too large when entering, the direct damage to the tissue is reduced through the buffer effect of the elastic layer. Of course, the entire nasobiliary drainage tube can be set as the same double-layer structure.

[0008] The specific technical solution is: a nasobiliary drainage tube, comprising

[0009] The entering end part is the part of the nasobiliary drainage tube that enters the body first, and its length is not less than 1 cm, which comprises

[0010] The elastic support tube structure is a tubular structure with elasticity, and a mesh hole or a drainage hole one is arranged on the elastic support tube structure corresponding to the drainage hole area;

[0011] The soft tube structure is attached to the outside of the elastic support tube structure, or the elastic support tube structure is embedded in the soft tube structure, the soft tube structure is made of soft glue material, and the soft tube structure is provided with a drainage hole two on the corresponding drainage area; when the elastic support tube structure is provided with a drainage hole one, the drainage hole one and the drainage hole two are communicated, and when the elastic support tube structure is provided with a mesh hole, the mesh hole area is not less than the drainage hole two area.

[0012] Through the above setting, the soft tube structure can provide direct contact protection; the elastic support tube structure provides elastic buffer protection, and when the entering pressure is too large, the direct damage to the tissue is reduced through the buffer effect of the inner tube.

[0013] Further, the elastic support tube structure is a mesh tube constructed by memory alloy fibers, which can be nickel-titanium memory alloy fibers or other alloy fibers, and the mesh tube is embedded in the soft tube structure.

[0014] Further, the head end of the entering end part is provided with a spherical top structure, a guide wire entering hole is arranged in the center of the spherical top structure for guiding the guide wire to enter, and a plurality of drainage holes three are arranged beside the guide wire entering hole, which are communicated with the pipeline of the inner tube structure. Through this setting, the damage of the head end of the entering end to the tissue can be further avoided.

[0015] It also includes a connecting end part, and the entering end part and the connecting end part constitute a complete drainage tube, and the connecting end part is connected with a drainage bag or a liquid injection structure.

[0016] Further, the connecting end part rear end is connected with a three-way joint capable of adjusting the open passage condition, which is respectively a first joint for connecting the connecting end part, a second joint for connecting the liquid injector to complete injection of various liquids, and a third joint for connecting the connecting pipe of the drainage bag.

[0017] Technical effects

[0018] By dividing the entering end part into a double-layer structure, and by preparing the soft pipe structure from soft glue material and weaving the elastic supporting pipe structure into an elastic net structure by using memory alloy fibers, the soft pipe structure can provide direct contact protection, and the elastic supporting pipe structure can provide elastic buffer protection, thereby reducing damage to the tissue to the greatest extent.

[0019] By arranging the spherical top structure of the entering end part and the guide wire hole and the drainage hole three thereon, the entering of the drainage tube guided by the guide wire can be ensured on the basis of further avoiding tissue damage, and effective drainage after fixation can be ensured.

[0020] By arranging the three-way joint, the liquid drainage to the outside can be directly completed through the passage between the communicating joint three and the joint one when the liquid needs to be drained out, and the liquid drainage to the inside can be directly completed through the passage between the communicating joint two and the joint one when the liquid needs to be injected in, and the setting of the third joint can effectively avoid the pollution risk caused by repeated replacement when the liquid is drained out and injected in. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the elastic supporting structure embedded in the soft pipe structure of the entering end part and the partial enlargement of the utility model;

[0022] Figure 2 It is a longitudinal section structure schematic view of the entering end part of the utility model;

[0023] Figure 3 It is a structure schematic view of the nasobiliary drainage tube in a flat state;

[0024] Figure 4 It is a partial enlargement structure schematic view of the net-shaped pipe of the elastic supporting pipe structure of the utility model;

[0025] Figure 5 It is a three-way joint part structure schematic view of the utility model;

[0026] Figure 6 It is a three-way joint part longitudinal section structure schematic view in which the first joint and the second joint are communicated;

[0027] Figure 7 It is a three-way joint part longitudinal section structure schematic view in which the first joint and the third joint are communicated;

[0028] Figure 8 The structure schematic view of the bag drainage bag and the three-way joint and the drainage tube in a flat state of the utility model;

[0029] Main figure mark explanation

[0030] 1, the entering end part; 11, the elastic support pipe structure; 111, the mesh; 12, the outer tube part; 121, the drainage hole two; 13, the ball top structure; 131, the guide wire entering hole; 132, the drainage hole three; 2, the connecting end part; 3, the three-way joint; 31, the first joint; 32, the second joint; 33, the third joint; 34, the round cake-shaped shell; 35, the passage adjusting core; 351, the T-shaped passage; 352, the T-shaped structure; 3521, the horizontal arm; 4, the drainage bag. Specific implementation

[0031] Reference Figures 1-8 A nasobiliary drainage tube, which comprises an entering end part 1, which is the part of the nasobiliary drainage tube that enters the body first, has a length of not less than 1 cm, comprises an elastic support pipe structure 11, which is a pipe structure with elasticity, and mesh holes 111 or a drainage hole one is arranged on the elastic support pipe structure 11 corresponding to the drainage hole area; and a soft pipe structure, which is attached to the outer side of the elastic support pipe structure or the elastic support pipe structure is embedded in the soft pipe structure, is prepared from a soft rubber material, and the soft pipe structure is provided with a drainage hole two 121 on the corresponding drainage area; when the elastic support pipe structure 11 is provided with a drainage hole one, the drainage hole one is in communication with the drainage hole two 121, and when the elastic support pipe structure 11 is provided with mesh holes 111, the area of the mesh holes 111 is not less than the area of the drainage hole two 121.

[0032] Through the above arrangement, the soft pipe structure can provide direct contact protection; the elastic support pipe structure 11 provides elastic buffer protection, and when the entering pressure is too large, the buffer effect of the inner tube can reduce the direct damage to the tissue.

[0033] It should be noted that the soft rubber material includes but is not limited to silicone material, latex material and other related medical soft materials.

[0034] More preferred embodiments, reference Figure 1, the elastic support tube structure 11 is a mesh tube made of memory alloy fibers, preferably, the memory alloy fibers can be nickel-titanium memory alloy fibers or other alloy fibers, and the mesh tube is embedded in the soft tube structure. The memory metal fibers with certain temperature sensitivity can be selected, so that the metal fibers exhibit different elastic states under different temperature conditions, but after entering and fixing to the drainage area, when the temperature stabilizes at body temperature, the support force is the strongest, and the bufferable elastic deformation is the smallest, which can ensure that the tissue is not damaged during the entering process, but after entering, the strongest support force can be maintained to avoid poor drainage caused by deformation.

[0035] Alternatively, other elastic materials with elastic compressive deformation can also be selected to construct the elastic support tube structure 11 containing drainage hole one.

[0036] In a more preferred embodiment, referring to Figure 1 , 2 , 3, 8, the head end of the entering end part 1 is provided with a ball top structure 13, the ball top structure 13 is centrally provided with a guide wire entering hole 131 for the guide wire to enter, and a plurality of drainage hole three 132 is arranged beside the guide wire entering hole 131, and the drainage hole three 132 is in communication with the pipeline of the inner tube structure. Through such arrangement, the damage of the head end of the entering end to the tissue can be further avoided. The structure of the ball top structure 13 is the same as that of the entering end part 1.

[0037] When the elastic support tube structure 11 is a mesh tube, in order to ensure the integrity of the mesh tube, the drainage hole two 121 and the drainage hole three 132 do not damage the integrity of the mesh tube.

[0038] In a more preferred embodiment, the drainage hole two 121 surrounds the array of soft tube structures and a plurality of drainage holes; wherein 6 columns of drainage holes are preferably arranged.

[0039] In a more preferred embodiment, the drainage hole three 132 is uniformly arrayed on the ball top structure 13. There are not less than 10 drainage hole threes 132; through such a way, the smooth drainage of the arrangement of the ball top structure 13 can be ensured.

[0040] Also included, referring to Figure 3 and Figure 8 ; the connecting end part 2, the entering end part 1 and the connecting end part 2 constitute a complete drainage tube, and the connecting end part 2 connects the drainage bag 4 or the liquid injection structure. Note that the injected liquid includes contrast agent, therapeutic liquid, and flushing liquid.

[0041] In a more preferred embodiment, the entering end part 1 and the connecting end part 2 are the same in arrangement except for the drainage hole arrangement part, and the overall arrangement of the drainage tube in the form of inner and outer layers can reduce the process difficulty. Alternatively, only the entering end part 1 is arranged in the form of containing the inner soft tube structure, which can reduce the problem of high cost of memory metal fibers.

[0042] In a more preferable embodiment, referring to Figures 5-7 The end of the connecting end part 2 is connected with a three-way joint 3 with adjustable open passage, which includes a first joint 31 for connecting the connecting end part 2, a second joint 32 for connecting the liquid injector to complete the injection of various liquids, and a third joint 33 for connecting the connecting pipe of the drainage bag 4. The structure of each joint and its combination can be combined by screw thread structure, and can also be combined by other firm ways.

[0043] In a more preferable embodiment, the three joints are vertically arranged in sequence, the three-way joint 3 is provided with a passage adjusting core 35, the passage adjusting core 35 is provided with a T-shaped passage, and the rotating adjusting structure of the passage adjusting core 35 is arranged outside the three-way joint 3. The three-way joint 3 is in the form of a circular cake, which includes a circular cake-shaped shell 34 and a circular cake-shaped passage adjusting core 35.

[0044] In a more preferable embodiment, the rotating adjusting structure is a T-shaped structure 352 corresponding to the position of the T-shaped passage, and the horizontal arm 3521 of the T-shaped structure 352 is rotated to the position perpendicular to the second or third joint 33 to be blocked, so as to realize the communication of the passage between the joint and the first joint 31.

[0045] The technical solutions in the embodiments of the present application are described clearly and completely by the specific embodiments, obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments, and the person skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied by other different specific embodiments, and the above embodiments and the features in the embodiments can be combined with each other without conflict, based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the present application.

Claims

1. A double-layered nasobiliary drainage tube that effectively protects tissues, characterized in that, It includes The inlet portion, which is the part of the nasobiliary drainage tube that first enters the body, has a length of not less than 1 cm and includes... The elastic support tube structure is a flexible tube structure, and the elastic support tube structure is provided with a mesh or a drainage hole of not less than the size of the drainage hole in the area corresponding to the drainage hole. and The flexible tube structure is attached to the outside of the elastic support tube structure, or the elastic support tube structure is embedded in the flexible tube structure. The flexible tube structure is made of soft rubber material, and the flexible tube structure has a second drainage hole in the corresponding drainage area. When the elastic support tube structure has a first drainage hole, the first drainage hole and the second drainage hole are connected. When the elastic support tube structure has a mesh, the area of ​​the mesh is not less than the area of ​​the second drainage hole.

2. The drainage tube according to claim 1, characterized in that, Soft rubber materials include medical-grade silicone materials and latex materials.

3. The drainage tube according to claim 1, characterized in that, The elastic support tube structure is a mesh tube made of shape memory alloy fibers.

4. The drainage tube according to claim 3, characterized in that, The shape memory alloy fiber is a nickel-titanium shape memory alloy fiber.

5. The drainage tube according to claim 3, characterized in that, Shape memory alloy fiber is a type of shape memory metal fiber with a certain degree of temperature sensitivity.

6. The drainage tube according to claim 1, characterized in that, The inlet end is designed as a dome structure, with a guide wire inlet hole in the center of the dome structure for the guide wire to enter. Multiple drainage holes are provided next to the guide wire inlet hole, and the drainage holes are connected to the pipes of the inner tube structure.

7. The drainage tube according to claim 6, characterized in that, The drainage holes are evenly arrayed on the dome structure, and the number of drainage holes is not less than 10.

8. The drainage tube according to claim 1, characterized in that, The drainage holes are arranged in multiple rows around the soft tube structure.

9. The drainage tube according to claim 8, characterized in that, Set up 6 rows of drainage holes.

10. The drainage tube according to claim 1, characterized in that, The nasobiliary drainage tube also includes a connecting end portion for connecting to a drainage bag or liquid injection structure; the inlet end portion and the connecting end portion constitute a complete drainage tube.

11. The drainage tube according to claim 1, characterized in that, Except for the drainage hole setting, the inlet and connection ends are set up in the same way.

12. The drainage tube according to claim 10, characterized in that, The rear end of the connecting end is connected to a T-connector that allows for adjustable flow. The three connectors are: the first connector for connecting the connecting end; the second connector for connecting the injector to inject various liquids; and the third connector for connecting the drainage bag's connecting tube.

13. The drainage tube according to claim 12, characterized in that, The three connectors are arranged vertically in sequence. A passage adjustment core is set inside the tee connector, and a T-shaped passage is set inside the passage adjustment core. A rotation adjustment structure for the passage adjustment core is set on the outside of the tee connector.

14. The drainage tube according to claim 12, characterized in that, The rotation adjustment structure is a T-shaped structure corresponding to the position of the T-shaped passage; by rotating the cross arm of the T-shaped structure to a position perpendicular to the second or third joint that needs to be blocked, a passage connecting this joint to the first joint can be achieved.

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