Biliary tract drainage tube with biliary tract stenosis expansion adjustable function

Abstract

A biliary tract drainage tube with a biliary tract stenosis expansion adjustable function comprises an in-vitro connector, an inner tube body, an outer tube body and a cylindrical air bag. The in-vitro joint is mounted at the rear end of the inner pipe body; the outer pipe body coaxially sleeves the outer side of the inner pipe body, and a sealed cavity is formed between the outer pipe body and the inner pipe body; the cylindrical air bag is arranged at the front end of the outer tube body, the cylindrical air bag and the outer tube body are coaxially distributed, and the cylindrical air bag is communicated with the sealing cavity; a drainage hole is formed in the portion, in front of the cylindrical air bag, of the inner tube body, a drainage hole channel is formed between the portion, behind the cylindrical air bag, of the outer tube body and the inner tube body, and the drainage hole channel penetrates through the sealing cavity in a sealed mode. According to the biliary tract drainage tube with the biliary tract stenosis dilation adjustable function, the cylindrical air bag with the adjustable size is adopted, the biliary tract drainage tube can be matched with the biliary tract stenosis position of a patient, the dilation degree of the biliary tract stenosis position of the patient can be properly adjusted, biliary tract injuries and the risk of postoperative complications can be reduced, and the biliary tract stenosis dilation adjustable function is achieved. And the precision and quality of percutaneous transhepatic drainage can be improved, and the postoperative life quality of a patient is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical auxiliary devices, and particularly relates to a biliary drainage tube with an adjustable function for dilating biliary strictures. Background Art

[0002] Patients with severe obstructive jaundice can undergo percutaneous transhepatic biliary drainage (PTBD) for biliary decompression, and then undergo surgical treatment after the patient's liver function has recovered, which can significantly reduce the surgical mortality rate. When patients are not suitable for radical surgery due to neoplastic lesions, PTBD can relieve jaundice symptoms, improve the patient's quality of life, and prolong the patient's survival period. Patients with acute suppurative cholangitis can undergo PTBD for biliary decompression to quickly reduce the entry of infection sources into the blood and improve the patient's symptoms. PTBD can also establish an operation channel for subsequent operations such as stone removal, tumor ablation, and stent implantation.

[0003] In addition, benign biliary stricture is a difficult disease in biliary surgery, which can be divided into intrahepatic bile duct stricture and extrahepatic bile duct stricture. The formation cause of extrahepatic bile duct stricture is mostly iatrogenic injury caused by biliary surgery, especially the extensive development of laparoscopic cholecystectomy. Among the cases of bile duct injury, iatrogenic injury caused by laparoscopic cholecystectomy accounts for about 75%. In addition, the probability of forming a stricture at the biliary-enteric anastomosis after biliary-enteric anastomosis can reach 2%-12.5%. Even if biliary-enteric anastomosis is performed again, a stricture may still form, and it is very difficult to handle. PTBD is one of the important means for the treatment of biliary stricture, which has the characteristics of simple operation, no need for general anesthesia, and low incidence of postoperative cholangitis and pancreatitis. For situations such as high biliary stricture and the need for multiple biliary drainages, PTBD has more advantages.

[0004] However, the currently clinically commonly used biliary drainage tube is a drainage tube with a balloon, and the size of the balloon is not adjustable. Therefore, it cannot match the biliary stricture of the patient, nor can it moderately adjust the degree of dilation of the patient's biliary stricture. The balloon with an unmatched size not only easily causes the rupture of the bile duct, but also may not be able to achieve the ideal degree of dilation of the biliary stricture due to the unmatched size of the balloon, 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 quality of life after surgery. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides a biliary drainage tube with an adjustable function for dilating biliary strictures. By using a cylindrical airbag with adjustable dimensions, it can match the biliary stricture of the patient, moderately adjust the degree of dilation of the biliary stricture of the patient, not only reduce the risk of biliary tract injury and postoperative complications, but also improve the accuracy and quality of percutaneous transhepatic biliary drainage, and improve the quality of life of the patient after surgery.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A biliary drainage tube with an adjustable function for dilating biliary strictures includes an external connector, an inner tube body, an outer tube body and a cylindrical airbag; the external connector is installed at the rear end of the inner tube body; the outer tube body is coaxially sleeved outside the inner tube body, and the annular space between the outer tube body and the inner tube body forms a sealed chamber; the cylindrical airbag is arranged at the front end of the outer tube body, the cylindrical airbag is coaxially distributed with the outer tube body, and the cylindrical airbag is communicated with the sealed chamber; drainage holes are provided on the inner tube body in front of the cylindrical airbag, and a drainage hole channel is arranged between the outer tube body and the inner tube body behind the cylindrical airbag, and the drainage hole channel is hermetically passed through the sealed chamber.

[0007] An external inflatable tube is connected to the rear end of the outer tube body, the external inflatable tube is connected to a gas source through a gas pipeline, and a pressure regulating valve and a pressure gauge are installed on the gas pipeline.

[0008] The pressure display value of the pressure gauge is matched with the expansion size of the cylindrical airbag.

[0009] A hook-shaped head is provided at the front end of the inner tube body, the hook-shaped head is an open structure, and a detachable sealing cover is provided at the open end of the hook-shaped head.

[0010] The number of the drainage holes is the same as that of the drainage hole channels, and the hole diameters of the orifices are equal.

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

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

[0013] The inner tube body and the outer tube body adopt an integrally injection-molded structure.

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

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

[0016] The beneficial effects of the present invention:

[0017] The biliary drainage tube with adjustable biliary stricture dilation function of the present invention adopts a cylindrical airbag with adjustable size, which can match the biliary stricture of the patient, moderately adjust the dilation degree of the biliary stricture of the patient, reduce the risk of biliary tract injury and postoperative complications, improve the accuracy and quality of percutaneous transhepatic biliary drainage, and improve the quality of life of the patient after surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a biliary drainage tube with adjustable biliary stricture dilation function of the present invention;

[0019] Figure 2 It is an initial dilation amplitude effect diagram of a biliary drainage tube with adjustable biliary stricture dilation function of the present invention at the target biliary stricture;

[0020] Figure 3 It is a recovery period dilation amplitude effect diagram of a biliary drainage tube with adjustable biliary stricture dilation function of the present invention at the target biliary stricture;

[0021] In the figure, 1 - external connector, 2 - inner tube body, 3 - outer tube body, 4 - cylindrical airbag, 5 - sealed chamber, 6 - drainage hole, 7 - drainage hole channel, 8 - external inflatable tube, 9 - hook-shaped head, 10 - target biliary tract. DETAILED DESCRIPTION OF THE INVENTION

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

[0023] As Figure 1 shown, a biliary drainage tube with adjustable biliary stricture dilation function includes an external connector 1, an inner tube body 2, an outer tube body 3 and a cylindrical airbag 4; the external connector 1 is installed at the rear end of the inner tube body 2; the outer tube body 3 is coaxially sleeved outside the inner tube body 2, and the annular space between the outer tube body 3 and the inner tube body 2 forms a sealed chamber 5; the cylindrical airbag 4 is arranged at the front end of the outer tube body 3, the cylindrical airbag 4 is coaxially distributed with the outer tube body 3, and the cylindrical airbag 4 is communicated with the sealed chamber 5; a drainage hole 6 is provided on the inner tube body 2 in front of the cylindrical airbag 4, and a drainage hole channel 7 is arranged between the outer tube body 3 and the inner tube body 2 behind the cylindrical airbag 4, and the drainage hole channel 7 seals and passes through the sealed chamber 5.

[0024] An external inflatable tube 8 is connected to the rear end of the outer tube body 3, the external inflatable tube 8 is communicated with a gas source through a gas pipeline, and a pressure regulating valve and a pressure gauge are installed on the gas pipeline.

[0025] The pressure display value of the pressure gauge matches the expansion size of the cylindrical airbag 4, so as to judge the expansion size of the cylindrical airbag 4 in real time according to the pressure display value of the pressure gauge.

[0026] At the front end of the inner tube body 2, there is a hook-shaped head 9. The hook-shaped head 9 is an open structure, and a detachable sealing cover is provided at the open end of the hook-shaped head 9 to prevent the drainage tube from slipping and shifting, and reduce the nursing difficulty.

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

[0028] The drainage holes 6 and the drainage channels 7 are distributed in a straight line, and the straight-line connection of the drainage holes 6 and the drainage channels 7 is parallel to the central axis of the inner tube body 2 to ensure the smoothness of bile drainage.

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

[0030] The inner tube body 2 and the outer tube body 3 adopt an integrally injection-molded structure.

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

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

[0033] The following describes a single use process of the present invention with reference to the accompanying drawings:

[0034] When performing biliary stricture drainage, first select the skin puncture point, then disinfect the selected skin puncture point, then lay a sterile drape, and then use 2% lidocaine for local anesthesia. After that, cut the local skin at the puncture point with a sharp blade, insert the puncture needle core into the inner tube body 2 through the external connector 1, and under the assistance and guidance of ultrasound or DSA, directly puncture the target biliary tract 10 with the puncture needle core, and send the cylindrical airbag 4 to the stenosis of the target biliary tract 10 so that the outer surface of the cylindrical airbag 4 contacts the inner wall of the stenosis of the target biliary tract 10.

[0035] After the above operations are completed, open the air source, control the opening degree of the air pressure regulating valve, start to inflate the sealing chamber 5, so that the cylindrical airbag 4 gradually expands to realize the adjustment of the size. At the same time, judge the expansion size of the cylindrical airbag 4 in real time according to the pressure display value of the pressure gauge, and expand the stenosis of the target biliary tract 10 with the expanded cylindrical airbag 4. As Figure 2 shown, since the stenosis degree of the stenosis of the target biliary tract 10 is relatively large and cannot be expanded in place at one time to prevent the target biliary tract 10 from rupturing, the expansion size of the cylindrical airbag 4 should be smaller.

[0036] When the dilation degree at the stenosis of the target bile duct 10 reaches the requirement, bile will enter the inner tube body 2 through the drainage holes 6 and the drainage channel 7, and then be drained to the outside of the body by the external connector 1.

[0037] As the treatment cycle progresses, the inflation size of the cylindrical balloon 4 can be adjusted again according to the recovery degree of the stenosis of the target bile duct 10 to further adjust the dilation degree at the stenosis of the target bile duct 10. As Figure 3 shown, since a certain degree of recovery has been achieved in the target bile duct 10, the inflation size of the cylindrical balloon 4 can be appropriately increased at this stage, so that the dilation degree at the stenosis of the target bile duct 10 gradually reaches the treatment requirement, to improve the postoperative curative effect and further enhance the quality of life of the patient.

[0038] The solutions in the embodiments are not intended to limit the protection scope of the present invention. Any equivalent implementation or modification without departing from the present invention is included in the protection scope of the present invention.

Claims

1. A biliary drainage tube with an adjustable function for dilating biliary stricture, characterized in that: It includes an external connector, an inner tube body, an outer tube body and a cylindrical airbag; the external connector is installed at the rear end of the inner tube body; the outer tube body is coaxially sleeved outside the inner tube body, and the annular space between the outer tube body and the inner tube body forms a sealed chamber; the cylindrical airbag is arranged at the front end of the outer tube body, the cylindrical airbag is coaxially distributed with the outer tube body, and the cylindrical airbag is communicated with the sealed chamber; drainage holes are provided on the inner tube body in front of the cylindrical airbag, and a drainage channel is arranged between the outer tube body and the inner tube body behind the cylindrical airbag, and the drainage channel seals through the sealed chamber.

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

3. The biliary drainage tube with an adjustable function for dilating biliary stricture according to claim 2, characterized in that: The pressure display value of the pressure gauge is matched with the expansion size of the cylindrical airbag.

4. A biliary drainage tube with an adjustable function for dilating biliary strictures according to claim 1, characterized in that: A hook-shaped head is provided at the front end of the inner tube body, the hook-shaped head is an open structure, and a detachable sealing cover is provided at the open end of the hook-shaped head.

5. A biliary drainage tube with an adjustable biliary stricture dilation function according to claim 1, characterized in that: The number of the drainage holes is the same as that of the drainage channels, and the orifice diameters of the holes are equal.

6. The biliary drainage tube with an adjustable function for dilating biliary stricture according to claim 1, characterized in that: The drainage holes and the drainage channels are distributed in a straight line, and the straight-line connection of the drainage holes and the drainage channels is parallel to the central axis of the inner tube body.

7. A biliary drainage tube with an adjustable function for dilating biliary strictures according to claim 1, characterized in that: Antibacterial coating layers are provided on the inner surface of the inner tube body, the outer surface of the outer tube body and the outer surface of the cylindrical airbag.

8. The biliary drainage tube with an adjustable function for dilating biliary stricture according to claim 1, characterized in that: The inner tube body and the outer tube body adopt an integrally injection-molded structure.

9. The biliary drainage tube with an adjustable function for dilating biliary stricture according to claim 1, characterized in that: The axial length of the inner tube body is 200 mm to 300 mm, and the pipe diameter specification of the inner tube body is 8.5 Fr.

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

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