Biliary tract drainage tube with adjustable function of expanding biliary tract stenosis

Abstract

A kind of biliary tract drainage tube with adjustable function of biliary tract stenosis expansion, including extracorporeal connector, inner tube body, outer tube body and cylindrical air bag;Extracorporeal connector is installed at the rear end of inner tube body;Outer tube body coaxially is sleeved on the outside of inner tube body and forms sealed chamber between the two;Cylindrical air bag is arranged at the front end of outer tube body, cylindrical air bag is coaxially distributed with outer tube body, cylindrical air bag is communicated with sealed chamber;Drainage hole is provided on the inner tube body in front of cylindrical air bag, drainage hole is provided between outer tube body and inner tube body behind cylindrical air bag, and drainage hole is sealed through sealed chamber.The biliary tract drainage tube with adjustable function of biliary tract stenosis expansion of the utility model adopts size-adjustable cylindrical air bag, can be matched with the stenosis of patient biliary tract, can be moderately adjusted to the expansion degree of the stenosis of patient biliary tract, can reduce the risk of biliary tract injury and postoperative complications, can improve the precision and quality of percutaneous transhepatic biliary drainage, and can improve the survival quality of patient after operation.

Description

Technical Field

[0001] This utility model belongs to the field of medical auxiliary equipment technology, and in particular relates to a biliary drainage tube with adjustable function for dilating biliary stricture. Background Technology

[0002] Patients with severe obstructive jaundice can undergo percutaneous transhepatic biliary drainage (PTB) for biliary decompression. Surgical treatment can be performed after liver function recovers, significantly reducing surgical mortality. If a patient is unsuitable for radical surgery due to a neoplastic lesion, PTB can alleviate jaundice symptoms, improve quality of life, and prolong survival. Patients with acute suppurative cholangitis can undergo PTB for biliary decompression to rapidly reduce the entry of infectious agents into the bloodstream and improve symptoms. PTB can also establish access for subsequent procedures such as stone removal, tumor ablation, and stent implantation.

[0003] Furthermore, benign biliary strictures are complex conditions in biliary surgery, and can be divided into intrahepatic bile duct strictures and extrahepatic bile duct strictures. The majority of extrahepatic bile duct strictures are caused by iatrogenic injury during biliary surgery, especially with the widespread use of laparoscopic cholecystectomy. Iatrogenic injuries from laparoscopic cholecystectomy account for approximately 75% of bile duct injury cases. Additionally, the probability of developing anastomotic strictures after choledochoenterostomy can reach 2%-12.5%. Even with repeat choledochoenterostomy, strictures may still occur, and they are very difficult to manage. Percutaneous transhepatic biliary drainage is one of the important methods for treating biliary strictures. It is characterized by its simplicity, lack of need for general anesthesia, and low incidence of postoperative cholangitis and pancreatitis. Percutaneous transhepatic biliary drainage is particularly advantageous for high-level biliary strictures and cases requiring multiple bile duct drainage.

[0004] However, the biliary drainage tubes currently used in clinical practice are balloon-equipped tubes, and the size of the balloon is not adjustable. Therefore, they cannot be matched to the patient's biliary stricture, nor can the degree of dilation at the stricture be properly adjusted. The mismatched size of the balloon not only easily leads to biliary rupture, but may also prevent the stricture from being dilated to the ideal degree, thus affecting the treatment effect. At the same time, there are risks of complications such as biliary tract infection, bile leakage, puncture sinus tract infection, and pain, which will further reduce the patient's postoperative quality of life. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a biliary drainage tube with adjustable dilation function for biliary strictures. It uses a cylindrical balloon with adjustable size, which can match the biliary stricture site of the patient and can appropriately adjust the degree of dilation at the biliary stricture site. This can reduce the risk of biliary tract injury and postoperative complications, improve the accuracy and quality of percutaneous transhepatic biliary drainage, and improve the patient's postoperative quality of life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a biliary drainage tube with adjustable dilation function for biliary stricture, comprising an external connector, an inner tube, an outer tube, and a cylindrical balloon; the external connector is installed at the rear end of the inner tube; the outer tube is coaxially fitted on the outside of the inner tube, and the annular space between the outer tube and the inner tube forms a sealed chamber; the cylindrical balloon is disposed at the front end of the outer tube, the cylindrical balloon is coaxially distributed with the outer tube, and the cylindrical balloon communicates with the sealed chamber; a drainage hole is provided on the inner tube in front of the cylindrical balloon, and a drainage channel is provided between the outer tube and the inner tube behind the cylindrical balloon, the drainage channel passing through the sealed chamber in a sealed manner.

[0007] An external inflation tube is connected to the rear end of the outer tube. The external inflation tube is connected to the air source through an air pipeline. An air pressure regulating valve and a pressure gauge are installed on the air pipeline.

[0008] The pressure reading on the pressure gauge matches the expansion size of the cylindrical airbag.

[0009] The inner tube has a hook-shaped head at its front end. The hook-shaped head is an open structure and is fitted with a removable sealing cover at the opening.

[0010] The number of drainage holes and drainage channels are the same, and the diameter of the holes is equal.

[0011] The drainage holes and drainage channels are arranged in a straight line, and the line connecting the drainage holes and drainage channels is parallel to the central axis of the inner tube.

[0012] An antibacterial coating layer is provided on the inner surface of the inner tube, the outer surface of the outer tube, and the outer surface of the cylindrical airbag.

[0013] The inner tube and outer tube are integrally injection molded.

[0014] The axial length of the inner tube is 200mm to 300mm, and the diameter of the inner tube is 8.5Fr.

[0015] The axial length of the cylindrical airbag is 20mm to 40mm, and the expansion size of the cylindrical airbag is adjustable from 4mm to 6mm.

[0016] The beneficial effects of this utility model are:

[0017] This invention relates to a bile duct drainage tube with adjustable dilation function for biliary strictures. It uses a cylindrical balloon with adjustable size, which can match the patient's biliary stricture site. It can moderately adjust the degree of dilation at the patient's biliary stricture site, which can reduce the risk of bile duct injury and postoperative complications, improve the accuracy and quality of percutaneous transhepatic bile duct drainage, and improve the patient's postoperative quality of life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a biliary drainage tube with adjustable dilation function for biliary stricture according to the present invention;

[0019] Figure 2 This is a diagram showing the initial expansion effect of a biliary drainage tube with adjustable dilation function at the target biliary stricture site according to the present invention.

[0020] Figure 3 This is a diagram showing the effect of the dilation range during the recovery period at the target biliary stricture site of a biliary drainage tube with adjustable dilation function for biliary stricture according to this utility model.

[0021] In the diagram, 1—external connector, 2—inner tube, 3—outer tube, 4—cylindrical airbag, 5—sealed chamber, 6—drainage hole, 7—drainage channel, 8—external inflation tube, 9—hook-shaped head, 10—target bile duct. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, a biliary drainage tube with adjustable dilation function for biliary stricture includes an external connector 1, an inner tube 2, an outer tube 3, and a cylindrical balloon 4. The external connector 1 is installed at the rear end of the inner tube 2. The outer tube 3 is coaxially fitted on the outside of the inner tube 2, and the annular space between the outer tube 3 and the inner tube 2 forms a sealed chamber 5. The cylindrical balloon 4 is located at the front end of the outer tube 3, and the cylindrical balloon 4 is coaxially distributed with the outer tube 3 and communicates with the sealed chamber 5. A drainage hole 6 is provided on the inner tube 2 in front of the cylindrical balloon 4, and a drainage channel 7 is provided between the outer tube 3 and the inner tube 2 behind the cylindrical balloon 4. The drainage channel 7 passes through the sealed chamber 5 in a sealed manner.

[0024] An external inflation tube 8 is connected to the rear end of the outer tube 3. The external inflation tube 8 is connected to the air source through an air pipeline. An air pressure regulating valve and a pressure gauge are installed on the air pipeline.

[0025] The pressure reading on the pressure gauge is matched with the expansion size of the cylindrical airbag 4, so as to determine the expansion size of the cylindrical airbag 4 in real time based on the pressure reading on the pressure gauge.

[0026] The inner tube 2 has a hook-shaped head 9 at its front end. The hook-shaped head 9 is an open structure, and the open part of the hook-shaped head 9 is equipped with a detachable sealing cover to prevent the drainage tube from slipping and shifting, thus reducing the difficulty of nursing care.

[0027] The number of drainage holes 6 and drainage channels 7 are the same and the orifice diameters are equal to ensure the consistency of bile drainage flow.

[0028] The drainage holes 6 and drainage channels 7 are arranged in a straight line, and the line connecting the drainage holes 6 and drainage channels 7 is parallel to the central axis of the inner tube 2 to ensure the stability of bile drainage.

[0029] An antibacterial coating layer is provided on the inner surface of the inner tube 2, the outer surface of the outer tube 3, and the outer surface of the cylindrical air bladder 4 to reduce postoperative complications such as secondary biliary tract infection and puncture sinus tract infection.

[0030] The inner tube 2 and the outer tube 3 adopt an integral injection molding structure.

[0031] The axial length of the inner tube 2 is 200mm to 300mm, and the diameter of the inner tube 2 is 8.5Fr.

[0032] The axial length of the cylindrical airbag 4 is 20mm to 40mm, and the expansion size of the cylindrical airbag 4 is adjustable from 4mm to 6mm.

[0033] The following describes a single use of this utility model with reference to the accompanying drawings:

[0034] During the drainage procedure for biliary stricture, the skin puncture point is first selected, then disinfected, and a sterile drape is laid. Local anesthesia is then administered using 2% lidocaine. The skin at the puncture point is then cut open with a scalpel, and the puncture needle is inserted into the inner tube 2 through the external connector 1. Under the guidance of ultrasound or DSA, the puncture needle directly punctures the target bile duct 10, and the cylindrical balloon 4 is delivered to the stricture of the target bile duct 10, so that the outer surface of the cylindrical balloon 4 contacts the inner wall of the stricture of the target bile duct 10.

[0035] After the above actions are completed, the air source is turned on, the opening of the air pressure regulating valve is controlled, and air begins to be filled into the sealed chamber 5, thereby causing the cylindrical airbag 4 to gradually expand, achieving size adjustment. Simultaneously, the expansion size of the cylindrical airbag 4 is judged in real time based on the pressure display value of the pressure gauge, and the expanded cylindrical airbag 4 dilates the narrowed area of ​​the target bile duct 10. Figure 2As shown, because the narrowing of the target bile duct 10 is relatively large, it cannot be expanded to the full extent in one go to prevent the target bile duct 10 from rupturing. Therefore, the expansion size of the cylindrical airbag 4 needs to be smaller.

[0036] Once the dilation of the narrowed portion of the target bile duct 10 reaches the required level, bile will enter the inner tube 2 through the drainage hole 6 and drainage channel 7, and then be drained to the outside through the external connector 1.

[0037] As the treatment progresses, the expansion size of the cylindrical balloon 4 can be adjusted again based on the degree of recovery at the target bile duct 10 stricture, further adjusting the degree of dilation at the target bile duct 10 stricture. For example... Figure 3 As shown, since the target bile duct 10 has achieved a certain degree of recovery, the expansion size of the cylindrical balloon 4 can be appropriately increased at this stage, so that the degree of expansion at the narrowing of the target bile duct 10 can gradually meet the treatment requirements, thereby improving the postoperative efficacy and further improving the patient's quality of life.

[0038] The solutions in the embodiments are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications that do not depart from the scope of protection of this utility model are included in the scope of protection of this utility model.

Claims

1. A biliary drainage tube with adjustable dilation function for biliary strictures, characterized in that: The device includes an external connector, an inner tube, an outer tube, and a cylindrical airbag. The external connector is installed at the rear end of the inner tube. The outer tube is coaxially fitted onto the outside of the inner tube, and the annular space between the outer and inner tubes forms a sealed chamber. The cylindrical airbag is located at the front end of the outer tube, and is coaxially distributed with the outer tube, communicating with the sealed chamber. A drainage hole is provided on the inner tube in front of the cylindrical airbag, and a drainage channel is provided between the outer and inner tubes behind the cylindrical airbag, with the drainage channel sealingly passing through the sealed chamber.

2. A biliary drainage tube with adjustable dilation function for biliary strictures according to claim 1, characterized in that: An external inflation tube is connected to the rear end of the outer tube. The external inflation tube is connected to the air source through an air pipeline. An air pressure regulating valve and a pressure gauge are installed on the air pipeline.

3. A biliary drainage tube with adjustable dilation function for biliary strictures according to claim 2, characterized in that: The pressure reading on the pressure gauge matches the inflation size of the cylindrical airbag.

4. A biliary drainage tube with adjustable dilation function for biliary strictures according to claim 1, characterized in that: The inner tube has a hook-shaped head at its front end. The hook-shaped head is an open structure and is fitted with a removable sealing cover at the opening.

5. A biliary drainage tube with adjustable dilation function for biliary strictures according to claim 1, characterized in that: The number of drainage holes and drainage channels are the same, and the diameter of the holes is equal.

6. A biliary drainage tube with adjustable dilation function for biliary strictures according to claim 1, characterized in that: The drainage holes and drainage channels are arranged in a straight line, and the line connecting the drainage holes and drainage channels is parallel to the central axis of the inner tube.

7. A biliary drainage tube with adjustable dilation function for biliary strictures according to claim 1, characterized in that: An antibacterial coating layer is provided on the inner surface of the inner tube, the outer surface of the outer tube, and the outer surface of the cylindrical airbag.

8. A biliary drainage tube with adjustable dilation function for biliary strictures according to claim 1, characterized in that: The inner tube and outer tube are integrally injection molded.

9. A biliary drainage tube with adjustable dilation function for biliary strictures according to claim 1, characterized in that: The axial length of the inner tube is 200mm to 300mm, and the diameter of the inner tube is 8.5Fr.

10. A biliary drainage tube with adjustable dilation function for biliary strictures according to claim 1, characterized in that: The axial length of the cylindrical airbag is 20mm to 40mm, and the expansion size of the cylindrical airbag is adjustable from 4mm to 6mm.

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