Nasobiliary drainage tube capable of being used for biliary tract medicine perfusion

Abstract

The nasobiliary drainage tube comprises a drainage tube body which is inserted into a bile duct to conduct drainage on bile, a first balloon, a second balloon and a medicine injection hole are arranged at the far end of the drainage tube body, and an inflation channel, a drainage cavity channel and a medicine conveying cavity channel are arranged in the drainage tube body. The inflation channel is communicated with the first balloon and the second balloon, the medicine injection hole is communicated with the medicine conveying cavity channel, a drainage hole communicated with the drainage cavity channel is formed in the drainage tube, a ventilation piece, a medicine injection connector and a drainage connector are arranged at the near end of the drainage tube, the ventilation piece is communicated with the inflation channel, the medicine injection connector is communicated with the medicine conveying cavity channel, and the drainage connector is communicated with the medicine conveying cavity channel. And the drainage joint is communicated with the drainage cavity. According to the nasobiliary drainage tube provided by the utility model, the drainage cavity channel can play a role in draining bile, the medicine delivery cavity channel and the medicine injection hole can deliver medicine to a bile duct tumor focus, and the first balloon and the second balloon can expand after being inflated so as to limit the medicine to a bile duct between the first balloon and the second balloon as far as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a nasobiliary drainage tube which can be used for bile duct drug perfusion. Background Art

[0002] Endoscopic nasobiliary drainage (ENBD) is established on the basis of diagnostic retrograde cholangiography (ERCP) technology and is a commonly used endoscopic biliary drainage method. It uses a thin plastic tube to be inserted into the bile duct through the duodenal papilla under endoscopy, and the other end is led out of the body from the nostril through the duodenum, stomach, esophagus, pharynx, etc., to establish an extracorporeal drainage route for bile. ENBD is a simple and effective method to relieve bile duct obstruction, and drainage can achieve the purpose of decompression, jaundice reduction, and anti-inflammation. As a simple, safe and effective bile drainage and bile duct flushing method, it can not only fully drain bile, but also flush the bile duct, perform drug infusion, and repeatedly perform cholangiography, effectively improving the patient's general condition. It has been widely used in clinical practice and has become a very effective endoscopic treatment method for biliary and pancreatic diseases such as obstructive jaundice and acute suppurative cholangitis.

[0003] The distal end of the currently used nasobiliary drainage tube is positioned by a pigtail bend or a straight insertion. The disadvantage is that the drainage tube is thin and smooth. When placed in the bile duct, if the surgeon is unskilled or uncoordinated, it is easy to cause the drainage tube to be displaced or dislocated, resulting in placement failure. In addition, the current nasobiliary drainage tube cannot deliver drugs to the local extrahepatic bile duct tumor. Utility Model Content

[0004] The utility model aims to provide a nasobiliary drainage tube which can be used for bile duct drug perfusion to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A nasobiliary drainage tube that can be used for bile duct drug perfusion comprises a drainage tube that is inserted into the bile duct to drain bile, wherein a first balloon, a second balloon and a drug injection hole are arranged at the distal end of the drainage tube, a certain distance is preset between the first balloon and the second balloon, the first balloon, the second balloon and the drainage tube located between the first balloon and the second balloon form a drug treatment structure, the drug injection hole is located on the drug treatment structure, an inflation channel, a drainage cavity and a drug delivery cavity are arranged inside the drainage tube, the inflation channel is connected to both the first balloon and the second balloon, the drug injection hole is connected to the drug delivery cavity, the drainage tube is provided with a drainage hole connected to the drainage cavity, and a vent, a drug injection joint and a drainage joint are arranged at the proximal end of the drainage tube, the vent is connected to the inflation channel, the drug injection joint is connected to the drug delivery cavity, and the drainage joint is connected to the drainage cavity.

[0007] In the above-mentioned nasobiliary drainage tube, the ventilation component includes a ventilation control structure arranged at the proximal end of the inflation channel, and the ventilation control structure has a ventilation state and a closed state.

[0008] The above-mentioned nasobiliary drainage tube, the ventilation control structure includes a spring member and a circular valve plate, and an annular groove is provided on the inner wall of the proximal end of the inflation channel to form a circular installation cavity, and the radial dimension of the circular installation cavity is larger than the radial dimension of the inflation channel.

[0009] In the above-mentioned nasobiliary drainage tube, the spring member is installed on the annular wall of the circular installation cavity away from the connecting port of the inflation channel, and the circular valve sheet is installed on the spring member.

[0010] The above-mentioned nasobiliary drainage tube has a connector at the proximal end of the drainage tube, a central mounting hole communicating with the drainage cavity is provided at the center of the connector, and the drainage connector is installed in the central mounting hole.

[0011] The above-mentioned nasobiliary drainage tube has an annular open cavity provided on the connecting head, an annular rotating body provided in the annular open cavity, an air vent and a drug delivery hole provided on the annular rotating body, a air vent joint provided on the air vent, the drug injection joint installed on the drug delivery hole, and the annular rotating body rotates in the annular open cavity to have different working positions.

[0012] The above-mentioned nasobiliary drainage tube, the annular rotating body is also provided with a first magnetic component, and the circular valve plate is provided with a second magnetic component, the magnetic properties of the first magnetic component and the second magnetic component are different, when the annular rotating body rotates to the point where the first magnetic component corresponds to the second magnetic component, the second magnetic component and the first magnetic component are attracted to each other to drive the circular valve plate to close the inflation channel.

[0013] In the above technical scheme, the nasobiliary drainage tube that can be used for bile duct drug perfusion provided by the embodiment of the utility model includes a drainage tube inserted into the bile duct to drain bile, a first balloon, a second balloon and an injection hole are arranged at the distal end of the drainage tube, a certain distance is preset between the first balloon and the second balloon, the first balloon, the second balloon and the drainage tube located between the first balloon and the second balloon form a drug treatment structure, the injection hole is located on the drug treatment structure, an inflation channel, a drainage cavity and a drug delivery cavity are arranged inside the drainage tube, the drainage cavity can play a role in draining bile, the drug delivery cavity and the injection hole can deliver the drug to the bile duct tumor lesion, and when in use, the first balloon and the second balloon can be respectively located on both sides of the bile duct tumor lesion, the first balloon and the second balloon can expand after inflation, and are used to block the bile duct, and limit the drug to the bile duct between the first balloon and the second balloon as much as possible, so as to avoid bile flowing to the tumor to dilute the drug concentration, and prevent the injected drug from flowing to the non-lesioned bile duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the structure of a nasobiliary drainage tube that can be used for bile duct drug perfusion provided in an embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the installation of a connector provided in an embodiment of the utility model;

[0017] Figure 3 The embodiment of the utility model provides Figure 2 The enlarged schematic diagram of point A in the middle;

[0018] Figure 4 A schematic structural diagram of an annular rotating body provided in an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1. Drainage tube; 11. First balloon; 12. Second balloon; 13. Injection hole; 14. Drainage hole; 15. Inflation channel; 16. Drainage cavity; 17. Drug delivery cavity; 2. Connector; 21. Ventilation piece; 211. Ventilation control structure; 212. Spring piece; 213. Circular valve piece; 214. Circular mounting cavity; 22. Injection connector; 23. Drainage connector; 24. Annular opening cavity; 25. Annular rotating body; 251. Ventilation hole; 252. Drug delivery hole; 253. Ventilation connector; 254. First magnetic element; 26. Center mounting hole. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-4 As shown, the embodiment of the utility model provides a nasobiliary drainage tube that can be used for bile duct drug perfusion, including a drainage tube 1 inserted into the bile duct to drain bile, a first balloon 11, a second balloon 12 and a drug injection hole 13 are arranged at the distal end of the drainage tube 1, a certain distance is preset between the first balloon 11 and the second balloon 12, the first balloon 11, the second balloon 12 and the drainage tube 1 located between the first balloon 11 and the second balloon 12 form a drug treatment structure, the drug injection hole 13 is located on the drug treatment structure, and the drainage tube 1 An inflation channel 15, a drainage cavity 16 and a drug delivery cavity 17 are arranged inside; the inflation channel 15 is connected with both the first balloon 11 and the second balloon 12; the injection hole 13 is connected with the drug delivery cavity 17; a drainage hole 14 connected with the drainage cavity 16 is arranged on the drainage tube 1; a vent 21, a drug injection joint 22 and a drainage joint 23 are arranged at the proximal end of the drainage tube 1; the vent 21 is connected with the inflation channel 15; the injection joint 22 is connected with the drug delivery cavity 17; and the drainage joint 23 is connected with the drainage cavity 16.

[0023] Specifically, for the sake of ease of description, the end of the drainage tube 1, the inflation channel 15 and the drainage cavity 16 close to the operator is called the proximal end, and the end of the drainage tube 1, the inflation channel 15 and the drainage cavity 16 away from the operator is called the distal end. During use, the distal ends of the drainage tube 1, the inflation channel 15 and the drainage cavity 16 are located inside the patient's body. The drainage tube 1 adopts a flexible tube that is inserted into the bile duct to drain bile in the prior art. A first balloon 11, an injection hole 13, a second balloon 12 and a drainage hole 14 are arranged at the distal end of the drainage tube 1. The first balloon 11 and the second balloon have an uninflated initial state and an inflated state. When the drainage tube 1 is not inserted into the bile duct, the first balloon 11 and the second balloon 12 are in the initial state. At this time, the first balloon 11 and the second balloon 12 are contracted, and their radial dimensions are equal to or slightly larger than the radial dimensions of the drainage tube 1. When the drainage tube 1 is inserted into the bile duct, the first balloon 11 and the second balloon 12 can be inflated to be in an inflated state. At this time, the first balloon 11 and the second balloon 12 are in contact with the wall of the bile duct, thereby achieving the fixation of the drainage tube 1.

[0024] In this embodiment, an inflation channel 15, a drug delivery cavity 17 and a drainage cavity 16 are independently provided inside the drainage tube 1. The inflation channel 15 can be one, so that the one inflation channel 15 is connected to both the first balloon 11 and the second balloon 12, and the first balloon 11 and the second balloon 12 can be inflated and deflated at the same time through the one inflation channel 15. Optionally, there can also be two inflation channels 15, that is, the first balloon 11 is connected to an inflation channel 15, and the second balloon 12 is connected to an inflation channel 15, and the first balloon 11 and the second balloon 12 can be inflated respectively through the two inflation channels 15, and the drug delivery cavity 17 is connected to the drug injection hole 13, and the drug delivery operation can be performed through the drug delivery cavity 17. A certain distance is preset between the first balloon 11 and the second balloon 12, and the injection hole 13 is located on the drainage tube 1 between the first balloon 11 and the second balloon 12. When the first balloon 11 and the second balloon 12 are in an inflated state, the first balloon 11, the drainage tube 1 and the second balloon 12 form a drug treatment structure. Since the first balloon 11 and the second balloon 12 are in contact with the wall of the bile duct, the drug can be delivered to the bile duct between the first balloon 11 and the second balloon 12 through the drug delivery cavity 17 and the injection hole 13, and the drug in the bile duct is blocked by the inflated first balloon 11 and the second balloon 12 to prevent the drug from flowing to other positions in the bile duct, so that the drug can stay in the local position of the bile duct tumor and improve the treatment effect.

[0025] In this embodiment, the drainage hole 14 is arranged on the drainage tube 1, and there are multiple drainage holes 14, and the specific number can be 3, 4, 5 or more. The multiple drainage holes 14 are all connected with the drainage cavity 16, and a connector 2 is arranged at the proximal end of the drainage tube 1, and a vent 21, a drug injection joint 22 and a drainage joint 23 are arranged on the connector 2. The vent 21 is connected to the inflation channel 15, the drug injection joint 22 is connected to the drug delivery cavity 17, and the drainage joint 23 is connected to the drainage cavity 16. The inflation channel 15, the first balloon 11 and the second balloon 12 can be inflated through the vent 21, and the therapeutic drugs can be delivered to the drug delivery cavity 17 and the injection hole 13 through the injection joint 22. The bile duct can be drained through the drainage joint 23, the drainage cavity 16 and the drainage hole 14.

[0026] The utility model provides a nasobiliary drainage tube 1 that can be used for bile duct drug perfusion, including a drainage tube 1 inserted into the bile duct to drain bile, a first balloon 11, a second balloon 12 and a drug injection hole 13 are arranged at the distal end of the drainage tube 1, a certain distance is preset between the first balloon 11 and the second balloon 12, the first balloon 11, the second balloon 12 and the drainage tube 1 located between the first balloon 11 and the second balloon 12 form a drug treatment structure, the drug injection hole 13 is located on the drug treatment structure, and an inflation channel 15, a drainage cavity 15 are arranged inside the drainage tube 1 6 and the drug delivery cavity 17, the drainage cavity 16 can drain bile, and the drug delivery cavity 17 and the injection hole 13 can deliver the drug to the bile duct tumor focus. At the same time, when in use, the first balloon 11 and the second balloon 12 can be respectively located on both sides of the bile duct tumor focus, and the first balloon 11 and the second balloon 12 can expand after being inflated to block the bile duct, and the drug is limited to the bile duct between the two first balloons 11 and the second balloon 12 as much as possible, so as to avoid bile flowing to the tumor to dilute the drug concentration, and prevent the injected drug from flowing to the non-lesioned bile duct.

[0027] In this embodiment, preferably, the ventilation piece 21 includes a ventilation control structure 211 arranged at the proximal end of the inflation channel 15, and the ventilation control structure 211 has a ventilation state and a closed state. When the ventilation control structure 211 is in the ventilation state, the inflation channel 15 is opened, and the first balloon 11 and the second balloon 12 can be inflated or deflated through the inflation channel 15. When the ventilation control structure 211 is in the closed state, the inflation channel 15 is closed, and the first balloon 11 and the second balloon 12 remain in the inflated state or the initial state of deflation.

[0028] In this embodiment, preferably, the ventilation control structure 211 includes a spring member 212 and a circular valve plate 213, and an annular groove is provided on the inner wall of the proximal end of the inflation channel 15 to form a circular mounting cavity 214, and the radial dimension of the circular mounting cavity 214 is larger than the radial dimension of the inflation channel 15, and the spring member 212 is installed on the annular wall of the circular mounting cavity 214 away from the connecting port of the inflation channel 15, and the circular valve plate 213 is installed on the spring member 212; the circular valve plate 213 is coaxially arranged with the inflation channel 15, and the radial dimension of the circular valve plate 213 is smaller than the radial dimension of the circular mounting cavity 214, so that an annular ventilation gap is formed between the circular valve plate 213 and the side wall of the circular mounting cavity 214, and at the same time, the radial dimension of the circular valve plate 213 is larger than the radial dimension of the inflation channel 15, so that the circular valve plate 213 can cover the connection between the inflation channel 15 and the circular mounting cavity 214, so that the inflation channel 15 is closed.

[0029] In this embodiment, preferably, a connector 2 is provided at the proximal end of the drainage tube 1, a central mounting hole 26 connected to the drainage cavity 16 is provided at the central position of the connector 2, and a drainage joint 23 is installed in the central mounting hole 26, and the drainage joint 23 can be a Luer joint.

[0030] In this embodiment, preferably, an annular opening cavity 24 is provided on the connector 2, an annular rotating body 25 is provided in the annular opening cavity 24, an air vent 251 and a drug delivery hole 252 are provided on the annular rotating body 25, an air vent 251 is provided with a air joint 253, and a drug delivery hole 252 is provided with a drug injection joint 22. The annular rotating body 25 rotates in the annular opening cavity 24 to have different working positions, and the working positions have three, namely, a first working position, a second working position and a third working position. When the annular rotating body 25 rotates to the first working position, the air vent 251 is coaxially connected with the inflation channel 15, and the drug delivery hole 252 is staggered with the drug delivery cavity 17 so that the drug delivery cavity 17 is closed. The ventilation hole 251 and the inflation channel 15 can be inflated or deflated through the ventilation joint 253 to achieve inflation or deflation of the first balloon 11 and the second balloon 12. When the annular rotating body 25 rotates to the second working position, the drug delivery hole 252 and the drug delivery cavity 17 are coaxially connected, the ventilation hole 251 is staggered from the inflation channel 15, and the inflation channel 15 is closed. At this time, therapeutic drugs can be delivered through the drug delivery hole 252 and the drug delivery cavity 17, so that the drugs are delivered to the local location of the bile duct tumor. When the annular rotating body 25 rotates to the third working position, the drug delivery hole 252 and the drug delivery cavity 17 are staggered so that the drug delivery cavity 17 is closed, and the ventilation hole 251 and the inflation channel 15 are staggered so that the inflation channel 15 is closed.

[0031] In this embodiment, preferably, a first magnetic member 254 is further provided on the annular rotating body 25, and a second magnetic member is provided on the circular valve plate 213. The magnetic properties of the first magnetic member 254 and the second magnetic member are different. When the annular rotating body 25 rotates to the point where the first magnetic member 254 corresponds to the second magnetic member, the second magnetic member and the first magnetic member 254 attract each other to drive the circular valve plate 213 to close the inflation channel 15; when the annular rotating body 25 rotates to the third working position, the first magnetic member 254 and the second magnetic member just correspond to each other, so that the first magnetic member 254 generates suction force on the second magnetic member, so that the circular valve plate 213 moves upward to cover the connection between the inflation channel 15 and the circular mounting cavity 214, so that the inflation channel 15 is closed. At the same time, since there is suction force between the first magnetic member 254 and the second magnetic member, the suction force has a positioning and fixing effect on the annular rotating body 25, so that the annular rotating body 25 is fixed in the third working position to prevent the annular rotating body 25 from rotating accidentally.

[0032] When using it, the operating steps are as follows:

[0033] 1. Empty the balloon and perform routine nasobiliary drainage;

[0034] 2. When the distal end of the drainage tube 1 reaches a suitable position in the bile duct, the injection hole 13 corresponds to the local position of the bile duct tumor, the annular rotating body 25 is rotated to the first working position, the inflation channel 15 is opened, and the first balloon 11 and the second balloon 12 are inflated with a syringe, so that the first balloon 11 and the second balloon 12 are filled and fixed in the bile duct;

[0035] 3. The annular rotating body 25 is rotated to the third working position, the inflation channel 15 is closed, the inflation channel 15 does not deflate, and the fixing effect of the balloon prevents the drainage tube 1 from being easily dislocated or falling out;

[0036] 4. Use the conversion tube to lead the drainage tube 1 out of the nasal cavity and fix it for routine drainage;

[0037] 5. If it is necessary to deliver drugs to the local location of the bile duct tumor, the annular rotating body 25 is rotated to the second working position to deliver therapeutic drugs to the drug delivery hole 252 and the drug delivery cavity 17, so that the drugs are delivered to the local location of the bile duct tumor.

[0038] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A nasobiliary drainage tube that can be used for bile duct drug perfusion, comprising a drainage tube inserted into the bile duct to drain bile, characterized in that: The distal end of the drainage tube is provided with a first balloon, a second balloon and a drug injection hole, a certain distance is preset between the first balloon and the second balloon, the first balloon, the second balloon and the drainage tube located between the first balloon and the second balloon form a drug treatment structure, the drug injection hole is located on the drug treatment structure, an inflation channel, a drainage cavity and a drug delivery cavity are arranged inside the drainage tube, the inflation channel is connected with both the first balloon and the second balloon, the drug injection hole is connected with the drug delivery cavity, the drainage tube is provided with a drainage hole connected with the drainage cavity, the proximal end of the drainage tube is provided with a vent, a drug injection joint and a drainage joint, the vent is connected with the inflation channel, the drug injection joint is connected with the drug delivery cavity, and the drainage joint is connected with the drainage cavity.

2. The nasobiliary drainage tube according to claim 1, characterized in that: The ventilator comprises a ventilating control structure disposed at a proximal end of the inflation channel, wherein the ventilating control structure has a ventilating state and a closing state.

3. The nasobiliary drainage tube according to claim 2, characterized in that: The ventilation control structure includes a spring member and a circular valve sheet. An annular groove is provided on the inner wall of the proximal end of the inflation channel to form a circular installation cavity. The radial dimension of the circular installation cavity is larger than the radial dimension of the inflation channel.

4. The nasobiliary drainage tube according to claim 3, characterized in that: The spring component is mounted on the annular wall of the circular mounting cavity away from the connecting port of the inflation channel, and the circular valve sheet is mounted on the spring component.

5. The nasobiliary drainage tube according to claim 4, characterized in that: A connector is provided at the proximal end of the drainage tube, a central mounting hole communicating with the drainage cavity is provided at the center of the connector, and the drainage joint is installed in the central mounting hole.

6. The nasobiliary drainage tube according to claim 5, characterized in that: The connector is provided with an annular open cavity, an annular rotating body is provided in the annular open cavity, an air vent and a drug delivery hole are provided on the annular rotating body, the air vent is provided with a air joint, the drug injection joint is installed on the drug delivery hole, and the annular rotating body rotates in the annular open cavity to have different working positions.

7. The nasobiliary drainage tube according to claim 6, characterized in that: A first magnetic component is also provided on the annular rotating body, and a second magnetic component is provided on the circular valve plate. The magnetic properties of the first magnetic component and the second magnetic component are different. When the annular rotating body rotates until the first magnetic component corresponds to the second magnetic component, the second magnetic component and the first magnetic component are attracted to each other to drive the circular valve plate to close the inflation channel.

Images