Novel biliary tract balloon dilatation device

Abstract

The utility model discloses a novel biliary tract balloon dilatation device, and relates to the technical field of gallbladder dilatation, and the novel biliary tract balloon dilatation device comprises a dilatation assembly; the expansion assembly comprises an expansion rod and an expansion block; the expansion rod is cylindrical; the expansion block is in a vertically-through circular truncated cone shape, the expansion rod is located in the expansion block, and the end, with the largest diameter, of the outer ring of the expansion rod is arranged at one end of the expansion rod. The expansion block comprises expansion plates, and the expansion block is equally divided into four expansion plates in the length direction of the axis of the expansion block; the expansion plate can initially abut against the inner wall of the narrow portion of the gall bladder of a patient through outward expansion for limiting, and the device can be accurately positioned through observation of a choledochoscope; by supporting the narrow part of the gall bladder, the gall bladder stenosis of a patient can be treated, the expansion time can be automatically controlled, and the gall bladder stenosis dilator is suitable for the time required by the expansion of the gall bladder stenosis of different patients.

Description

Technical Field

[0001] The utility model relates to the technical field of gallbladder dilation, in particular to a novel bile duct balloon dilation device. Background Art

[0002] Gallbladder stenosis, also known as cystic duct stenosis or common bile duct stenosis, is a common liver disease. This condition usually originates from stones in the gallbladder cavity, or changes in the structure of the intrahepatic sinus caused by other reasons. When the wall inside the cystic duct becomes thickened, adhered, or deformed like a tumor, the inner diameter of the common bile duct will become smaller, affecting the excretion of bile, and may eventually cause severe bile stasis, causing symptoms such as liver stones, cholecystitis, and diarrhea. In severe cases, it may also lead to liver diseases such as liver failure and cirrhosis.

[0003] The patient's gallbladder stenosis can cause obstructive jaundice, resulting in poor bile outflow. The patient may experience jaundice with yellow skin, eyes, and urine, as well as itchy skin, white stools and other symptoms. The continued increase in the jaundice index can cause great damage to the liver. Long-term abnormal functional state may lead to liver failure, and then cause kidney failure.

[0004] At the same time, when the patient undergoes gallbladder-preserving stone removal surgery, the patient's gallbladder stenosis will increase the difficulty of the operation. The narrow gallbladder may be difficult to expand, which increases the difficulty of surgical instruments entering the gallbladder and makes the stone removal process more complicated; the stone removal rate is reduced. Due to the narrow gallbladder, stones may be more easily stuck in the narrow area, making it difficult to completely remove the stones, which may lead to residual stones and increase the risk of recurrence of gallbladder stones after surgery; the risk of bile duct injury is increased. Gallbladder stenosis may lead to abnormal bile duct structure, which increases the risk of bile duct injury during surgery; bile duct injury may lead to serious complications such as bile leakage and bile duct obstruction.

[0005] Therefore, there is a need for a new type of biliary balloon dilatation device that can dilate the stenosis of the patient's gallbladder. Utility Model Content

[0006] By providing a novel biliary balloon dilation device in the embodiments of the present application, the problems in the prior art are solved. In the prior art, gallbladder stenosis in patients can cause obstructive jaundice, resulting in poor bile outflow. Patients may present with jaundice manifestations such as yellowing of the skin, eyes, and urine, and may also be accompanied by symptoms such as skin itching and white stools. The continuous increase in the jaundice index can cause great damage to the liver, and the long-term abnormal functional state may lead to liver failure, which in turn causes renal failure. At the same time, when performing a cholecystolithotomy with gallbladder preservation on patients, gallbladder stenosis in patients will increase the surgical difficulty. The dilation plate is expanded outward and initially abuts against the inner wall of the gallbladder stenosis in patients for positioning. Through the observation of the choledochoscope, the device can accurately position; by propping up the stenosed part of the gallbladder, the gallbladder stenosis in patients can be treated, and the dilation time can be controlled independently to adapt to the dilation time required at the gallbladder stenosis of different patients; it can improve bile flow, effectively improve the flow of bile, reduce the pressure in the gallbladder, thereby alleviating related symptoms; prevent cholecystitis and cholelithiasis, improve bile flow, help reduce bile stasis, and reduce the incidence of cholecystitis and cholelithiasis; improve gallbladder function, restore the normal shape and function of the gallbladder, help improve the working efficiency of the gallbladder, thereby improving the quality of life of patients; according to the situation of the gallbladder stenosis in patients, the device can be selected to be placed first or later independently, expanding the scope of application of the device and improving the surgical success rate.

[0007] The embodiments of the present application provide a novel biliary balloon dilation device, including a dilation component;

[0008] The dilation component includes a dilation rod and a dilation block;

[0009] The dilation rod is cylindrical;

[0010] The dilation block is frustum-shaped with upper and lower through holes. The dilation rod is located inside the dilation block, and the end with the largest outer diameter of the dilation rod is arranged at one end of the dilation rod;

[0011] The dilation block includes a dilation plate, and the dilation block is evenly divided into four dilation plates along the axial length direction thereof;

[0012] The dilation component further includes a fixing bladder, the fixing bladder is an annular airbag, and the fixing bladder is fixed on the outer circle of the dilation block.

[0013] As an improvement, the axis of the dilation block is on the same straight line as the axis of the dilation rod;

[0014] The axis of the fixing bladder is on the same straight line as the axis of the dilation rod.

[0015] As an improvement, the dilation plate is arc-shaped;

[0016] The expansion plate is fixed to the middle outer wall of the arc surface at one end of the expansion rod and is rotatably connected to one end of the expansion rod. A torsion spring is sleeved on the rotating rod where the expansion plate is rotatably connected to the expansion rod, and the two ends of the torsion spring are respectively fixed to the expansion plate and the expansion rod.

[0017] As an improvement, the expansion assembly further includes a wire passing port one, a wire passing port two, an inflation tube, a connecting tube, a delivery tube, and a traction rope;

[0018] One end of the expansion rod away from the expansion plate is provided with a wire passing port one, and the length direction of the wire passing port one is parallel to the axis of the expansion rod;

[0019] The side wall of the expansion rod is provided with four wire passing ports two, which respectively correspond to the four expansion plates one by one, and the wire passing port two communicates with the wire passing port one;

[0020] The number of the traction ropes is the same as that of the wire passing ports two and corresponds one by one. One end of the traction rope is fixed to the inner wall of the expansion plate, and the end of the traction rope away from the expansion plate passes through the wire passing port two and the wire passing port one and extends to the outer end of the wire passing port one;

[0021] The inflation tube is fixed to the outer wall of the expansion rod, and one end of the inflation tube close to the expansion plate is fixed to the expansion plate and communicates with the fixing bladder. A part of the inflation tube communicating with the expansion plate is a telescopic tube;

[0022] One end of the inflation tube away from the expansion plate communicates with an inflation device, and the fixing bladder communicates with the inflation tube;

[0023] The maximum outer diameter of the expansion block is smaller than the minimum diameter in the patient's gallbladder.

[0024] As an improvement, in the initial state, the end of the traction rope away from the expansion plate always maintains a tensile force, and the torsion spring on the rotating rod where the expansion plate is rotatably connected to the expansion rod is torsionally deformed under the tensile force of the traction rope.

[0025] As an improvement, there are two fixing bladders, and both of the two fixing bladders are fixed to the outer circle of the expansion block;

[0026] The axes of the two fixing bladders are on the same straight line.

[0027] As an improvement, the expansion assembly further includes a friction block and a support column;

[0028] The friction block is rectangular parallelepiped-shaped, the length direction of the friction block is parallel to the generatrix of the expansion block, and both ends of the friction block parallel to the generatrix of the expansion block are fixed to the outer wall of the fixing bladder;

[0029] The cross-section of the friction block perpendicular to the axis of the expansion rod is arc-shaped;

[0030] There are multiple friction blocks, and the multiple friction blocks are fixedly arranged on the outer wall of the fixed capsule at uniform intervals;

[0031] The support column is cylindrical. The number of support columns is the same as that of the friction blocks and they correspond one by one. The axis of the support column is perpendicular to the length direction of the friction block. One end of the support column is fixedly arranged in the middle of the side of the friction block close to the fixed capsule, and the other end of the support column away from the friction block is fixedly arranged on the outer wall of the fixed capsule;

[0032] Both the friction block and the support column are made of rubber.

[0033] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0034] First, the expansion plate expands outwards and initially abuts against the inner wall of the stenotic part of the patient's gallbladder for positioning. Through the observation of the choledochoscope, the device can accurately position; by propping up the stenotic part of the gallbladder, the device can treat the gallbladder stenosis of the patient, and the expansion time can be controlled independently to adapt to the expansion time required for the gallbladder stenosis of different patients; it can improve the bile flow, effectively improve the bile flow, reduce the pressure in the gallbladder, thereby alleviating related symptoms; prevent cholecystitis and cholelithiasis, improve the bile flow, help reduce bile stasis, and reduce the incidence of cholecystitis and cholelithiasis; improve the gallbladder function, restore the normal shape and function of the gallbladder, help improve the working efficiency of the gallbladder, and thus improve the quality of life of the patient; according to the condition of the stenotic part of the patient's gallbladder, the device can be selected to be placed first or later, expanding the application range of the device and improving the success rate of the operation;

[0035] Second, enhance the stability. The two fixed capsules can clamp the stenotic part of the gallbladder to form additional support and positioning, and can prevent the fixed capsule from moving or retracting due to shaking or biliary peristalsis; improve the safety and applicability. The fixed capsule has high flexibility. The device can adapt to different degrees and types of biliary stenosis, which expands the application range of the device and makes it more practical;

[0036] Third, enhance the fixing effect. The addition of the friction blocks can increase the friction between the fixed capsule and the inside of the gallbladder. When the device moves due to external force, the friction blocks can deform to increase the friction force, ensure the stable fixation of the device in the gallbladder, prevent sliding or displacement during the process of propping up the stenotic part, improve the surgical safety. By enhancing the fixing effect, the risk of gallbladder injury or complications caused by the movement or displacement of the device can be reduced, which helps improve the surgical safety and reduce the surgical risk of the patient. Description of the Drawings

[0037] Figure 1Front view cross-sectional view of a novel biliary balloon dilation device of the present utility model;

[0038] Figure 2 Schematic diagram of the expanded state of the expansion plate of a novel biliary balloon dilation device of the present utility model;

[0039] Figure 3 Schematic diagram of the installation of two fixing sacs of a novel biliary balloon dilation device of the present utility model;

[0040] Figure 4 Schematic diagram of the installation of the friction block of a novel biliary balloon dilation device of the present utility model;

[0041] Figure 5 Schematic diagram of the installation of the support column of a novel biliary balloon dilation device of the present utility model.

[0042] In the figure: 100, expansion assembly; 110, expansion rod; 111, wire passing port one; 112, wire passing port two; 120, expansion plate; 130, fixing sac; 140, inflation tube; 150, connecting tube; 160, delivery tube; 170, friction block; 180, support column; 190, towing rope. Detailed implementation manners

[0043] To facilitate the understanding of the present utility model, the present application will be described more comprehensively with reference to the relevant attached drawings; the attached drawings show the preferred embodiments of the present utility model. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thoroughly and comprehensively understood.

[0044] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs; the terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0046] After the patient completes the cholecystolithotomy with gallbladder preservation, one end of the dilation rod 110 with the dilation plate 120 can be inserted into the patient's gallbladder. The end with a smaller diameter of the dilation rod 110 is inserted into the narrow part of the gallbladder first, which is convenient for insertion. And the choledochoscope is inserted together following behind the dilation plate 120. The position of the dilation plate 120 is observed through the choledochoscope. When the dilation plate 120 is inserted into the narrow part of the gallbladder, by loosening one end of the traction rope 190 away from the dilation plate 120, the traction rope 190 is not under tension, and the dilation plate 120 automatically expands outwards through the torsion spring at the rotational connection with the dilation rod 110, and initially abuts against the inner wall of the narrow part of the patient's gallbladder for positioning. The inflation tube 140 can be inflated according to the abutment situation observed through the choledochoscope. The gas is delivered into the fixing bladder 130, and the fixing bladder 130 expands to dilate the narrow part of the patient's gallbladder again. The device stays at the narrow part of the patient's gallbladder for a period of time, and the staying time depends on the actual situation until the narrow part of the patient's gallbladder can be fully expanded. After use, the fixing bladder 130 is deflated, and one end of the traction rope 190 is stretched to reset the dilation plate 120, and then it can be withdrawn. During the cholecystolithotomy with gallbladder preservation for the patient, when it is found that the patient's gallbladder is narrow and it is inconvenient to perform the operation, the device can be first placed in the patient's gallbladder, and after fully expanding it, the device is taken out and then the operation is performed.

[0047] Embodiment 1: As Figure 1 - Figure 2 shown, a novel biliary balloon dilation device of the present application includes a dilation assembly 100,

[0048] The dilation assembly 100 includes a dilation rod 110 and a dilation block;

[0049] The dilation rod 110 is cylindrical;

[0050] The dilation block is frustum-shaped with upper and lower through holes. The axis of the dilation block is on the same straight line as the axis of the dilation rod 110. The dilation rod 110 is located inside the dilation block, and the end with the largest outer diameter of the dilation rod 110 is arranged at one end of the dilation rod 110;

[0051] The dilation block includes a dilation plate 120. The dilation block is evenly divided into four dilation plates 120 along the length direction of its axis;

[0052] The dilation plate 120 is arc-shaped;

[0053] The dilation plate 120 is fixed to the outer wall of the middle of the arc surface at one end of the dilation rod 110 and is rotationally connected to the dilation rod 110. A torsion spring is sleeved on the rotating rod where the dilation plate 120 is rotationally connected to the dilation rod 110, and both ends of the torsion spring are respectively fixed to the dilation plate 120 and the dilation rod 110;

[0054] The expansion assembly 100 further includes a fixing bladder 130, which is an annular airbag. The axis of the fixing bladder 130 is on the same straight line as the axis of the expansion rod 110, and the fixing bladder 130 is fixed on the outer ring of the expansion block;

[0055] The expansion assembly 100 further includes a wire passing port one 111, a wire passing port two 112, an air charging pipe 140, a communicating pipe 150, a conveying pipe 160, and a traction rope 190;

[0056] One end of the expansion rod 110 away from the expansion plate 120 is provided with a wire passing port one 111, and the length direction of the wire passing port one 111 is parallel to the axis of the expansion rod 110;

[0057] The side wall of the expansion rod 110 is provided with four wire passing ports two 112, which respectively correspond to the four expansion plates 120 one by one, and the wire passing port two 112 communicates with the wire passing port one 111;

[0058] The number of the traction ropes 190 is the same as the number of the wire passing ports two 112 and they correspond to each other one by one. One end of the traction rope 190 is fixed on the inner wall of the expansion plate 120, and the end of the traction rope 190 away from the expansion plate 120 passes through the wire passing port two 112 and extends to the outer end of the wire passing port one 111 through the wire passing port one 111;

[0059] In the initial state, the end of the traction rope 190 away from the expansion plate 120 always maintains a pulling force, and the torsion spring on the rotating rod where the expansion plate 120 is rotatably connected to the expansion rod 110 is deformed by the pulling force of the traction rope 190;

[0060] The air charging pipe 140 is fixed on the outer wall of the expansion rod 110. One end of the air charging pipe 140 close to the expansion plate 120 is fixed on the expansion plate 120 and communicates with the fixing bladder 130. A part of the air charging pipe 140 communicating with the expansion plate 120 is a telescopic pipe;

[0061] One end of the air charging pipe 140 away from the expansion plate 120 is communicated with an air inflation device, and the fixing bladder 130 is communicated with the air charging pipe 140;

[0062] The maximum diameter of the outer ring of the expansion block is smaller than the minimum diameter in the patient's gallbladder;

[0063] The air inflation device communicated with the air charging pipe 140 is a prior art and will not be elaborated here.

[0064] After the patient completes the cholecystolithotomy with gallbladder preservation, one end of the dilator rod 110 with the dilator plate 120 can be inserted into the patient's gallbladder. The end with a smaller diameter of the dilator rod 110 is inserted into the narrow part of the gallbladder first, which is convenient for insertion. And the choledochoscope is inserted together following behind the dilator plate 120. The position of the dilator plate 120 is observed through the choledochoscope. When the dilator plate 120 is inserted into the narrow part of the gallbladder, by loosening one end of the traction rope 190 away from the dilator plate 120, the traction rope 190 is not under tension, and the dilator plate 120 automatically expands outwards through the torsion spring at the rotating connection with the dilator rod 110, and initially abuts against the inner wall of the narrow part of the patient's gallbladder for positioning. The inflation tube 140 can be inflated according to the contact situation observed through the choledochoscope. The gas is delivered into the fixing bladder 130, and the fixing bladder 130 expands to expand the narrow part of the patient's gallbladder again. The device stays in the narrow part of the patient's gallbladder for a period of time, and the residence time depends on the actual situation until the narrow part of the patient's gallbladder can be completely expanded. After use, the fixing bladder 130 is deflated, and one end of the traction rope 190 is stretched to reset the dilator plate 120, and then it can be withdrawn. During the cholecystolithotomy with gallbladder preservation for the patient, when it is found that the patient's gallbladder is narrow and it is inconvenient to perform the operation, the device can be first placed in the patient's gallbladder. After it is completely expanded, the device is taken out and then the operation is performed.

[0065] Compared with the prior art, the dilator plate 120 expands outwards and initially abuts against the inner wall of the narrow part of the patient's gallbladder for positioning. Through the observation of the choledochoscope, the device can be accurately positioned; by propping up the narrow part of the gallbladder, the narrow part of the patient's gallbladder can be treated, and the expansion time can be controlled by itself to adapt to the expansion time required for the narrow part of different patients' gallbladders; it can improve the bile flow, effectively improve the bile flow, reduce the pressure in the gallbladder, thereby alleviating related symptoms; prevent cholecystitis and cholelithiasis, improve the bile flow, help reduce bile stasis, and reduce the incidence of cholecystitis and cholelithiasis; improve the gallbladder function, restore the normal shape and function of the gallbladder, help improve the working efficiency of the gallbladder, and thus improve the patient's quality of life; according to the situation of the narrow part of the patient's gallbladder, the device can be selected to be placed first or later by itself, expanding the applicable range of the device and improving the success rate of the operation.

[0066] Embodiment 2: When Embodiment 1 is used, the narrow part of the patient's gallbladder is propped up by the dilator plate 120 and the fixing bladder 130 together. However, when in use, the inner wall of the gallbladder of some patients is relatively moist and smooth. During the operation of propping up the narrow part of the gallbladder by the fixing bladder 130, when the doctor holds the dilator rod 110, it will shake, resulting in the position of the fixing bladder 130 being easily separated from the fixation of the narrow part of the gallbladder. Therefore, the solution of Embodiment 1 is improved as Figure 3 shown:

[0067] There are two fixing sacs 130, and both of the two fixing sacs 130 are fixed on the outer ring of the expansion block;

[0068] The axes of the two fixing sacs 130 are on the same straight line.

[0069] When in use, when both the expansion rod 110 and the expansion plate 120 are placed into the patient's gallbladder and the stenosis of the gallbladder needs to be expanded, through the observation of the choledochoscope, the stenosis of the gallbladder is positioned between the two fixing sacs 130. The inflation tube 140 supplies air to inflate the fixing sacs 130. During the inflation process, the stenosis of the patient's gallbladder is propped up. After being propped up, the stenosis of the patient's gallbladder will be between the two fixing sacs 130, and its position is restricted.

[0070] Enhance stability. The two fixing sacs 130 can clamp the stenosis of the gallbladder to form additional support and limit, and can prevent the fixing sacs 130 from moving or retracting due to shaking or biliary peristalsis. Improve safety and strong applicability. The fixing sacs 130 have high flexibility. This device can adapt to different degrees and types of biliary stenosis, which expands the application range of the device and makes it more practical.

[0071] Embodiment 3: When Embodiment 2 is in use, the position of the device is restricted by the installed fixing sacs 130. However, during the use process, the friction between the fixing sacs 130 and the inner wall of the patient's gallbladder is small, and the stability during use is poor and it is easy to break away. Therefore, the solution of Embodiment 2 is improved as follows Figure 4 - Figure 5 shown:

[0072] The expansion assembly 100 further includes friction blocks 170 and support columns 180;

[0073] The friction blocks 170 are cuboid-shaped. The length direction of the friction blocks 170 is parallel to the generatrix of the expansion block. The two ends of the friction blocks 170 parallel to the generatrix of the expansion block are fixed on the outer wall of the fixing sacs 130;

[0074] The cross-section of the friction blocks 170 along the direction perpendicular to the axis of the expansion rod 110 is arc-shaped;

[0075] There are multiple friction blocks 170, and multiple friction blocks 170 are evenly spaced and fixed on the outer wall of the fixing sacs 130;

[0076] The support columns 180 are cylindrical. The number of the support columns 180 is the same as the number of the friction blocks 170 and they correspond one by one. The axis of the support columns 180 is perpendicular to the length direction of the friction blocks 170. One end of the support columns 180 is fixed in the middle of the side of the friction blocks 170 close to the fixing sacs 130, and the other end of the support columns 180 away from the friction blocks 170 is fixed on the outer wall of the fixing sacs 130;

[0077] Both the friction block 170 and the support column 180 are made of rubber material.

[0078] After the fixing bladder 130 is fully inflated, the friction block 170 and the support column 180 can increase the fixation of the device to the patient's gallbladder. The friction block 170 is supported by the support column 180. When the device moves to the occurrence position, both ends of the friction block 170 can deform to provide a certain frictional force and play a supporting role.

[0079] To enhance the fixation effect, the addition of the friction block 170 can increase the frictional force between the fixing bladder 130 and the interior of the gallbladder. When the device moves due to external force, the friction block 170 can deform to increase the frictional force, ensuring the stable fixation of the device in the gallbladder, preventing sliding or displacement during the process of propping up the stenosis, improving the safety of the operation. By enhancing the fixation effect, it can reduce the risk of gallbladder injury or complications that may be caused by the movement or displacement of the device, contribute to improving the safety of the operation, and reduce the surgical risk of the patient.

[0080] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A novel biliary balloon dilation device, comprising a dilation assembly (100); The expansion assembly (100) comprises an expansion rod (110) and an expansion block; The expansion rod (110) is cylindrical; The expansion block is in the shape of a truncated cone that is connected from top to bottom. The expansion rod (110) is located inside the expansion block. The end of the expansion rod (110) with the largest outer diameter is arranged at one end of the expansion rod (110). The expansion block comprises an expansion plate (120), and the expansion block is evenly divided into four expansion plates (120) along the length direction of its axis; It is characterized in that The expansion assembly (100) further comprises a fixing bag (130), wherein the fixing bag (130) is an annular air bag, and the fixing bag (130) is fixed to the outer ring of the expansion block.

2. A novel biliary balloon dilatation device as claimed in claim 1, characterized in that: The axis of the expansion block and the axis of the expansion rod (110) are on the same straight line; The axis of the fixing bag (130) and the axis of the expansion rod (110) are on the same straight line.

3. A novel biliary balloon dilatation device as claimed in claim 1, characterized in that: The expansion plate (120) is arc-shaped; The expansion plate (120) is fixed to the outer wall of the middle part of the arc surface at one end of the expansion rod (110) and is rotatably connected to the one end of the expansion rod (110). A torsion spring is sleeved on the rotating rod rotatably connected to the expansion plate (120) and the expansion rod (110), and the two ends of the torsion spring are respectively fixed to the expansion plate (120) and the expansion rod (110).

4. A novel biliary balloon dilatation device as claimed in claim 1, characterized in that: The expansion assembly (100) further comprises a first wire-passing port (111), a second wire-passing port (112), an inflation tube (140), a connecting tube (150), a delivery tube (160) and a traction rope (190); The end of the expansion rod (110) away from the expansion plate (120) is provided with a wire opening (111), and the length direction of the wire opening (111) is parallel to the axis of the expansion rod (110); The side wall of the expansion rod (110) is provided with a second wire passing opening (112), there are four second wire passing openings (112), and the second wire passing openings (112) correspond to the four expansion plates (120) one by one, and the second wire passing openings (112) are connected to the first wire passing opening (111); The number of the traction ropes (190) is consistent with the number of the second wire passing openings (112), and they correspond one to one. One end of the traction rope (190) is fixed to the inner wall of the expansion plate (120), and the end of the traction rope (190) away from the expansion plate (120) passes through the second wire passing opening (112) and the first wire passing opening (111) and extends to the outer end of the first wire passing opening (111); The inflation tube (140) is fixed to the outer wall of the expansion rod (110), one end of the inflation tube (140) close to the expansion plate (120) is fixed to the expansion plate (120) and is connected to the fixing bag (130), and the part of the inflation tube (140) connected to the expansion plate (120) is a telescopic tube; One end of the inflation tube (140) away from the expansion plate (120) is connected to the inflation device, and the fixing bag (130) is connected to the inflation tube (140); The maximum diameter of the outer ring of the expansion block is smaller than the minimum diameter inside the patient's gallbladder.

5. A novel biliary balloon dilatation device as claimed in claim 4, characterized in that: In the initial state, the end of the traction rope (190) away from the expansion plate (120) always maintains tension, and the torsion spring on the rotating rod rotatably connected to the expansion plate (120) and the expansion rod (110) is twisted and deformed by the tension of the traction rope (190).

6. A novel biliary balloon dilatation device as claimed in claim 1, characterized in that: There are two fixing bags (130), and both fixing bags (130) are fixed on the outer ring of the expansion block; The axes of the two fixing bags (130) are on the same straight line.

7. A novel biliary balloon dilatation device as claimed in claim 1, characterized in that: The expansion assembly (100) further comprises a friction block (170) and a support column (180); The friction block (170) is in the shape of a rectangular parallelepiped, the length direction of the friction block (170) is parallel to the generatrix of the expansion block, and the two ends of the friction block (170) parallel to the generatrix of the expansion block are fixed to the outer wall of the fixing bag (130); The friction block (170) has an arc-shaped cross section along a direction perpendicular to the axis of the expansion rod (110); There are a plurality of friction blocks (170), and the plurality of friction blocks (170) are evenly spaced and fixed on the outer wall of the fixing bag (130); The support column (180) is cylindrical in shape. The number of the support columns (180) is consistent with the number of the friction blocks (170) and corresponds one to one. The axis of the support column (180) is perpendicular to the length direction of the friction block (170). One end of the support column (180) is fixed to the middle of the side of the friction block (170) close to the fixed capsule (130), and the end of the support column (180) away from the friction block (170) is fixed to the outer wall of the fixed capsule (130). The friction block (170) and the support column (180) are both made of rubber.

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