A percutaneous transhepatic biliary drainage tube

Abstract

The present invention discloses a percutaneous transhepatic bile duct puncture drainage tube, comprising: a tube body, a deformable portion, and a control wire. The tube body has a drainage channel and is used for drainage. The deformable portion is provided on the outer wall of the tube body. The control wire is used to control the tube body to deform into a pigtail shape and to deform the deformable portion into a deformed protrusion. The pigtail-shaped tube body and the deformed protrusion confine the drainage tube within the bile duct, making it difficult for the drainage tube to be discharged from the human body, thereby improving the safety of use. The deformable portion limits the length of the control wire, making it difficult for the control wire to be blocked by obstructions in the bile duct, thereby reducing the difficulty of removing the drainage tube. The present invention is applicable to the field of medical devices.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a percutaneous transhepatic bile duct puncture drainage tube. Background Art

[0002] Percutaneous transhepatic biliary drainage (PTBD) involves percutaneous, transhepatic puncture of the bile duct under imaging guidance (usually X-ray fluoroscopy or ultrasound under DSA), followed by placement of a drainage tube to direct bile flow to the outside of the body or into the duodenum. It is primarily used to treat biliary obstruction and acute inflammation. It includes external drainage, internal drainage, and both internal and external drainage, and is the foundation of all interventional treatments for biliary obstruction. Internal drainage involves successfully passing a guidewire through the obstruction into the duodenum, where bile is drained into the intestine using both internal and external drainage tubes.

[0003] When a bile duct puncture drainage tube is inserted into the human body, the following problems arise: 1. The drainage tube is prone to falling off due to the body's own rejection reaction; 2. When a pigtail tube is used, the pigtail tube cannot be restored in time during the removal process, making it difficult to remove the drainage tube. If the silk thread of the pigtail tube is cut to facilitate the removal of the pigtail tube, it is easy for the thread to remain in the human body, which has a certain impact on the human body. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a percutaneous transhepatic biliary puncture drainage tube that can effectively prevent the tube from falling out and reduce the difficulty of removing the drainage tube.

[0005] The percutaneous transhepatic biliary puncture drainage tube according to an embodiment of the present invention comprises:

[0006] The tube body includes a flexible section and a pigtail section connected in sequence, wherein the end of the flexible section away from the pigtail section is a first end, the end of the pigtail section away from the flexible section is a second end, the end where the flexible section and the pigtail section are connected is a connecting end, and the outer side wall of the flexible section is provided with a mounting groove;

[0007] a deformation portion disposed in the mounting slot, the deformation portion including a third end facing the first end and a fourth end facing the second end, the third end being connected to the mounting slot, and the fourth end being movable relative to the third end;

[0008] a control wire, passing through the tube body and capable of controlling the bending of the pigtail segment, the control wire passing through the mounting slot and fixedly connected to the fourth end;

[0009] Wherein, the control wire is configured such that when the control wire is pulled out from the first end under the action of external force, the pigtail section bends, the fourth end moves toward the third end, and forms a deformed protrusion protruding from the outer wall of the tube body.

[0010] The percutaneous transhepatic biliary puncture drainage tube according to the embodiment of the present invention has at least the following beneficial effects:

[0011] 1. When the drainage tube is inserted into a preset position in the human body, the doctor pulls the control wire so that the control wire is pulled out from the first end and fixed. The pigtail section bends and is clamped at the connecting position between the bile duct and the duodenum to prevent the drainage tube from falling out. The deformed protrusion formed by the deformed portion can abut against the obstruction in the bile duct, further preventing the drainage tube from falling out and improving the anti-fall-out effect of the drainage tube.

[0012] 2. When the drainage tube needs to be pulled out, first untie the fixed control wire, and then apply force to pull out the drainage tube. During the pulling-out process, the deformed protrusion will first contact the obstructed part. The deformed protrusion is squeezed by the obstruction, and the fourth end is away from the third end. The deformed protrusion gradually decreases, so that the control wire is also drawn into the first end. The pigtail section also has excess control wire. The pigtail section is easier to change from a complete state to a straight state, making it easier for the pigtail section to pass through the obstructed part. The difficulty of pulling out the drainage tube is reduced, and pulling out is more convenient.

[0013] According to some embodiments of the present invention, the mounting groove is annular, and the deformable portion is sleeved on the mounting groove;

[0014] or

[0015] The installation groove is linear, and the deformation portion is arranged in the installation groove.

[0016] According to some embodiments of the present invention, the control wire is bonded to the fourth end;

[0017] or,

[0018] The fourth end is provided with a fixing hole, the control wire is passed through the fixing hole, and the control wire is bound to the fixing hole.

[0019] According to some embodiments of the present invention, the further comprising: a plurality of control splitting threads;

[0020] The mounting groove is annular, and the deformable portion is sleeved on the mounting groove;

[0021] The tube body further includes a plurality of control branch pipes communicating with the first end and the mounting groove, at least one control branch wire passing through one of the control branch pipes and connected to the fourth end.

[0022] Wherein, at the fourth end, the control branch wires and the control wires are distributed in a circular pattern around the axis of the tube body.

[0023] According to some embodiments of the present invention, the length from the third end to the connecting end is L1, the length from the bile duct obstruction to the duodenum is L2, and the percutaneous transhepatic bile duct puncture drainage tube satisfies: L1≤L2;

[0024] In which, the deformation part is configured as follows: when the drainage tube is inserted into a preset position in the human body, the deformation part passes through the obstruction, the control wire is subjected to external force, the pigtail section bends and stops at the connecting position between the bile duct and the duodenum, and the deformation protrusion abuts the end of the obstruction away from the first end.

[0025] According to some embodiments of the present invention, a control channel is provided on the tube wall of the tube body, connected to the first end and to the outer wall of the connecting end; one end of the control wire is located outside the first end, and the other end is passed through the control channel and fixedly connected to the second end outside the second end; the control wire passes through the mounting groove and is fixedly connected to the fourth end;

[0026] or,

[0027] The tube body includes a drainage channel connecting the first end and the second end, a first control hole connected to the drainage channel at the connecting end, a second control hole connected to the drainage channel at the second end, a third control hole connected to the drainage channel at the side of the bottom of the mounting groove facing the second end, and a fourth control hole connected to the drainage channel at the side of the bottom of the mounting groove facing the first end;

[0028] One end of the control wire passes through the drainage channel from the first end, passes through the outside of the tube body from the second control hole, then passes through the drainage channel from the first control hole, then passes through the outside of the tube body from the third control hole, and is passed through the fourth end, then passes through the drainage channel from the fourth control hole, and finally passes through the first end. The control wire is fixedly connected to the deformation part, and the other end of the control wire is fixed outside the first end.

[0029] According to some embodiments of the present invention, a control channel is provided on the tube wall of the tube body, connected to the first end and to the outer wall of the connecting end; one end of the control wire is located outside the first end, and the other end is passed through the control channel and fixedly connected to the second end outside the second end; the control wire passes through the mounting groove and is fixedly connected to the fourth end;

[0030] The control channel is divided into a first sub-channel and a second sub-channel by the mounting groove, and the first sub-channel is located between the first end and the mounting groove.

[0031] According to some embodiments of the present invention, the control wire is passed between the deformation portion and the bottom of the installation groove.

[0032] According to some embodiments of the present invention, a side of the deformation portion facing the bottom of the installation groove and / or a groove bottom of the installation groove is provided with an avoidance channel, and the control wire is passed through the avoidance channel.

[0033] According to some embodiments of the present invention, it further includes: a connector and a control member, the connector is connected to the first end, the other end of the control wire is passed through the connector from the first end and is located outside the connector, and the control member is connected to one end of the control wire.

[0034] According to some embodiments of the present invention, the connector is provided with an annular groove, the control wire can be wrapped around the annular groove, and the operating member can be snapped into the annular groove.

[0035] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0037] Figure 1 This is a schematic structural diagram of a first embodiment of a control wire of a percutaneous transhepatic biliary puncture drainage tube according to an embodiment of the present invention when not tightened;

[0038] Figure 2 A schematic cross-sectional view of a first embodiment of a control wire of a percutaneous transhepatic biliary puncture drainage tube according to an embodiment of the present invention when not tightened;

[0039] Figure 3 This is a schematic structural diagram of a first embodiment of a control wire of a percutaneous transhepatic biliary puncture drainage tube according to an embodiment of the present invention when it is tightened;

[0040] Figure 4 A schematic cross-sectional view of a first embodiment of a control wire of a percutaneous transhepatic biliary puncture drainage tube according to an embodiment of the present invention when the control wire is tightened;

[0041] Figure 5 A schematic cross-sectional view of a second embodiment of a control wire of a percutaneous transhepatic biliary puncture drainage tube according to an embodiment of the present invention when not tightened;

[0042] Figure 6 A schematic cross-sectional view of a second embodiment of a control wire of a percutaneous transhepatic biliary puncture drainage tube according to an embodiment of the present invention when the wire is tightened;

[0043] Figure 7This is a schematic structural diagram of a percutaneous transhepatic biliary puncture drainage tube according to an embodiment of the present invention when it is tightened in the human body.

[0044] Figure Number:

[0045] Tube body 100; drainage channel 110; flexible section 120; mounting groove 121; pigtail section 130; first end 140; second end 150;

[0046] Deformation portion 200; third end 210; fourth end 220;

[0047] Control wire 300;

[0048] Connector 400. DETAILED DESCRIPTION

[0049] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0050] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In the description of the present invention, "a number" refers to one or more, and "a plurality" refers to two or more. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly indicating the number or order of the technical features.

[0052] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0053] In related technologies, the process of inserting a bile duct puncture drainage tube into the human body is as follows: first, a puncture needle is used to penetrate into the bile duct from outside the human body; then, a guide wire enters the bile duct through the needle tube of the puncture needle, and under the display of angiography, it passes through the obstruction position of the bile duct and moves to the connecting position of the bile duct and duodenum; then, a coaxial dilation tube is used to expand the channel at the obstruction position along the guide wire; finally, the drainage tube is inserted into the guide wire, moved along the guide wire to the connecting position of the bile duct and duodenum, and then the guide wire is pulled out to fix the drainage tube to complete the puncture.

[0054] Among them, the drainage tube has a drainage channel, and the drainage tube is inserted into the guide wire through the drainage channel to move along the guide wire. The outer wall of the drainage tube is provided with multiple first holes and multiple second holes arranged in sequence along the axial direction. After the drainage tube is inserted, the bile duct is obstructed and divided into a blocked area and a connected area. The blocked area refers to: the area where the gallbladder and liver output bile, but the bile is blocked by obstruction; the connected area refers to: the area where the bile duct is connected to the duodenum without being blocked by obstruction; wherein the first hole is located within the blocked area, and the second hole is located within the connected area. The bile within the blocked area enters the drainage channel through the first hole, passes through the obstruction, and flows into the duodenum through the second hole in the connected area or the other end of the drainage channel, thereby realizing the drainage of bile.

[0055] Due to the influence of the human body's rejection reaction, the drainage tube is easily pushed off by the human muscles, causing the drainage tube to fail to work properly and bring greater danger to the patient. It is necessary to avoid the occurrence of tube detachment.

[0056] Reference Figures 1 to 7 As shown, a percutaneous transhepatic biliary puncture drainage tube according to an embodiment of the present invention includes: a tube body 100, a deformation portion 200 and a control wire 300. The tube body 100 has a drainage channel 110 and is used for drainage. The deformation portion 200 is provided on the outer wall of the tube body 100. The control wire 300 is used to control the deformation of the tube body 100 into a pigtail shape, and to deform the deformation portion 200 into a deformation protrusion. The pigtail-shaped tube body 100 and the deformation protrusion limit the drainage tube within the bile duct and are not easily discharged by the human body, thereby improving the safety of use. In addition, the deformation portion 200 limits the length of the control wire 300 extending out of the tube body 100, so that the control wire 300 is not easily blocked by the obstruction in the bile duct, thereby reducing the difficulty of removing the drainage tube.

[0057] In this embodiment, the tube body 100 includes a flexible section 120 and a pigtail section 130 that are connected in sequence. The flexible section 120 and the pigtail section 130 are integrally formed and are different parts of the tube body 100. The drainage channel 110 runs through the flexible section 120 and the pigtail section 130. The flexible section 120 adapts to the curved bile duct to facilitate the drainage tube to enter the bile duct and be continuously used in the bile duct. The pigtail section 130 needs to extend out of the connecting position between the bile duct and the duodenum. After being extended, the pigtail section 130 bends into a pigtail shape under the action of the control wire 300. The curved pigtail section 130 can abut against the connecting port between the bile duct and the duodenum, making it difficult for the pigtail section 130 to be dragged into the bile duct. The end of the flexible section 120 away from the pigtail section 130 is a first end 140, and the end of the pigtail section 130 away from the flexible section 120 is a second end 150. The drainage channel 110 passes through the first end 140 and the second end 150. The end where the flexible section 120 and the pigtail section 130 are connected is a connecting end, which refers to the transition portion between the flexible section 120 and the pigtail section 130. The outer wall of the flexible section 120 is provided with a mounting groove 121. In addition, due to the presence of the mounting groove 121, the wall of the tube body 100 can be appropriately thickened, making it easier to process.

[0058] The deformable portion 200 is disposed within the mounting groove 121. The deformable portion 200 includes a third end 210 facing the first end 140 and a fourth end 220 facing the second end 150. The third end 210 is connected to the mounting groove 121, and the fourth end 220 is movable relative to the third end 210. When the fourth end 220 moves toward the third end 210, the central portion of the deformable portion 200 is squeezed and protrudes away from the tube body 100 through the notch of the mounting groove 121, forming a deformed protrusion. The deformable portion 200 can be integrally bonded to the tube body 100, or it can be integrally formed with the tube body 100 and formed by machining the drainage tube. When the deformation portion 200 has not been deformed, the side of the deformation portion 200 away from the bottom of the installation groove 121 can be flush with the outer wall of the tube body 100, or lower than the outer wall of the tube body 100, or higher than the outer wall of the tube body 100. Because the expansion tube will expand the obstructed part, even if the deformation portion 200 is higher than the outer wall of the tube body 100, it will not affect the installation of the drainage tube.

[0059] The control wire 300 is disposed through the tube body 100 and is capable of controlling the bending of the pigtail section 130. The control wire 300 is disposed through the mounting slot 121 and is fixedly connected to the fourth end 220. The control wire 300 is configured such that, when the control wire 300 is withdrawn from the first end 140 under external force, the pigtail section 130 bends, the fourth end 220 moves toward the third end 210, and a deformed protrusion is formed protruding from the outer wall of the tube body 100. When used by medical personnel, the pigtail section 130 and the deformable portion 200 are controlled by pulling the control wire 300, making it more convenient for medical personnel to use.

[0060] It is worth understanding that when the drainage tube is inserted into a preset position in the human body, the doctor pulls the control wire 300 so that the control wire 300 is pulled out from the first end 140 and fixed, and the pigtail section 130 is bent and clamped at the connecting position between the bile duct and the duodenum to prevent the drainage tube from falling out. The deformed protrusion formed by the deformed portion 200 can abut against the obstruction in the bile duct, further preventing the drainage tube from falling out and improving the anti-fall-out effect of the drainage tube. When the drainage tube needs to be pulled out, the fixed control wire 300 is first untied, and then the drainage tube is pulled out with force. During the pulling-out process, the deformed protrusion will first contact the obstructed part. The deformed protrusion is squeezed by the obstruction, and the fourth end 220 is away from the third end 210. The deformed protrusion gradually decreases, so that the control wire 300 is also drawn into the first end 140. The pigtail section 130 also has excess control wire 300. The pigtail section 130 is easier to change from a complete state to a straight state, making it easier for the pigtail section 130 to pass through the obstructed part, reducing the difficulty of pulling out the drainage tube and making it more convenient to pull out.

[0061] Reference Figure 1 and Figure 3 As shown, in some specific embodiments of the present invention, the mounting groove 121 is annular, and the deformation portion 200 is sleeved in the mounting groove 121; or, the mounting groove 121 is linear, and the deformation portion 200 is disposed within the mounting groove 121.

[0062] It is worth understanding that when the mounting groove 121 is annular, the deformed protrusion of the deformable part 200 is in a circular ring shape, and the deformed protrusion can abut against obstructions of all shapes, and has higher reliability in use; when the mounting groove 121 is linear, the deformed protrusion of the deformable part 200 is in an arc-shaped protrusion, which is more suitable for scenarios where the obstruction basically blocks the bile duct, and the deformation part 200 is more convenient to manufacture.

[0063] Reference Figure 2 As shown, in some specific embodiments of the present invention, the control wire 300 is bonded to the fourth end 220; or, the fourth end 220 is provided with a fixing hole, the control wire 300 is passed through the fixing hole, and the control wire 300 is tied to the fixing hole.

[0064] It is worth noting that by fixing the control wire 300 to the fourth end 220 through bonding or binding, the control wire 300 is fixed to the fourth end 220, thereby achieving a fixation between the control wire 300 and the fourth end 220. When the control wire 300 is withdrawn from the first end 140, the deformable portion 200 can be simultaneously deformed. Specifically, bonding is bonding together using an adhesive such as glue, while binding means that the control wire 300 is tied to the fourth end 220 using other threads.

[0065] In some specific embodiments of the present invention, it also includes: multiple control branch wires; the mounting groove 121 is annular, and the deformation portion 200 is sleeved on the mounting groove 121; the tube body 100 also includes multiple control branch pipes connecting the first end 140 and the mounting groove 121, at least one control branch wire is passed through a control branch pipe and connected to the fourth end 220, wherein, at the fourth end 220, the control branch wires and the control wire 300 are distributed circumferentially around the axis of the tube body 100.

[0066] It is worth noting that the deformation effect of the annular deformation portion 200 is ensured by multiple control wires, so that the force on the fourth end 220 is more balanced and the sliding along the installation groove 121 is more convenient. Specifically, after extending from the first end 140, the control wire can be screwed into one with the control wire 300 for easy stretching.

[0067] As another embodiment, the mounting groove 121 is linear, the number of the mounting grooves 121 is multiple, and the mounting grooves 121 are spaced apart in sequence around the circumferential direction of the tube body 100. The number of the deformation parts 200 is multiple, and the third end 210 of each deformation part 200 is connected to a mounting groove 121. Each control wire is fixedly connected to the fourth end 220 in each mounting groove 121. The control wire and the control wire 300 can control the deformation of all the deformation parts 200. After the deformation of the deformation part 200, a plurality of deformation protrusions are formed that are spaced apart in sequence around the circumferential direction.

[0068] Reference Figure 7 As shown, in some specific embodiments of the present invention, the length from the third end 210 to the connecting end is L1, the length from the obstruction in the bile duct to the duodenum is L2, and the percutaneous transhepatic bile duct puncture drainage tube satisfies: L1≤L2; wherein, the deformation portion 200 is configured as follows: when the drainage tube is inserted into a preset position in the human body, the deformation portion 200 passes through the obstruction, the control wire 300 is subjected to external force, the pigtail section 130 bends and stops at the connecting position between the bile duct and the duodenum, and the deformation protrusion abuts the end of the obstruction away from the first end 140.

[0069] It is worth understanding that the length L2 from the obstruction in the bile duct to the duodenum is calculated through photos taken by the instrument. When L1=L2, if the pigtail segment 130 reaches the preset position, that is, the connection position between the bile duct and the duodenum, the deformation portion 200 will just pass through the obstruction. When the control wire 300 is pulled at this position, the deformation protrusion of the deformation portion 200 after deformation just abuts the obstruction, and the pigtail segment 130 is clamped at the connection position between the bile duct and the duodenum.

[0070] When the drainage tube needs to be removed, the medical staff first unties the control wire 300 so that the control wire 300 is in a relaxed state, and the deformation of the deformed part 200 and the pigtail section 130 are partially restored; the medical staff then pulls the drainage tube out of the human body, the drainage tube moves outward, and the deformed part 200 shrinks due to the force of the obstruction, and pushes the excess control wire 300 between the mounting groove 121 and the second end 150. When the pigtail section 130 moves to the obstruction part, it is restored to a straight state through the excess control wire 300, and the control wire 300 is restricted by the fourth end 220 of the deformed part 200 and will not be taken out of the tube body 100 too much, so that the length of the control wire 300 located at the connecting end and the second end 150 and located outside the tube body 100 is limited. This part of the control wire 300 is not easy to interfere with the removal of the drainage tube, and is more convenient to use.

[0071] Reference Figures 1 to 7 As shown, in some specific embodiments of the present invention, the tube wall of the tube body 100 is provided with a control channel connected to the first end 140 and connected to the outer wall of the connecting end, one end of the control wire 300 is located outside the first end 140, and the other end is passed through the control channel and fixedly connected to the second end 150 outside the second end 150, and the control wire 300 passes through the mounting groove 121 and is fixedly connected to the fourth end 220.

[0072] Alternatively, the tube body 100 includes a drainage channel 110 connecting the first end 140 and the second end 150, a first control hole connecting the drainage channel 110 at the connecting end, a second control hole connecting the drainage channel 110 at the second end 150, a third control hole connecting to the drainage channel 110 on the side of the bottom of the mounting groove 121 facing the second end 150, and a fourth control hole connecting to the drainage channel 110 on the side of the bottom of the mounting groove 121 facing the first end 140; one end of the control wire 300 penetrates into the drainage channel 110 from the first end 140, and passes out of the tube body 100 from the second control hole, then penetrates into the drainage channel 110 from the first control hole, then passes out of the tube body 100 from the third control hole, and is penetrated at the fourth end 220, then penetrates into the drainage channel 110 from the fourth control hole, and finally passes out from the first end 140, and the control wire 300 is fixedly connected to the deformation portion 200, and the other end of the control wire 300 is fixed outside the first end 140.

[0073] It is worth noting that the control wire 300 can be set in the tube wall of the tube body 100, or in the drainage channel 110 of the tube body 100. The pigtail section 130 and the deformation part 200 can be controlled by moving the control wire 300.

[0074] As another embodiment, one end of the control wire 300 may be passed through the drainage pipe and directly fixedly connected to the second end 150 , and the other end may extend from the first end 140 .

[0075] In some specific embodiments of the present invention, the tube wall of the tube body 100 is provided with a control channel connected to the first end 140 and connected to the outer wall of the connecting end. One end of the control wire 300 is located outside the first end 140, and the other end is passed through the control channel and fixedly connected to the second end 150 outside the second end 150. The control wire 300 passes through the mounting groove 121 and is fixedly connected to the fourth end 220; the control channel is divided into a first sub-channel and a second sub-channel by the mounting groove 121, and the first sub-channel is located between the first end 140 and the mounting groove 121.

[0076] It is worth noting that the control channel is divided into two parts by the mounting groove 121 , and the control wire 300 can more easily pass through the deformation portion 200 of the mounting groove 121 and be fixedly connected to the fourth end 220 of the deformation portion 200 .

[0077] Specifically, the control wire 300 is passed through between the deformation part 200 and the bottom of the installation groove 121. The deformation part 200 is provided with an avoidance channel on one side facing the bottom of the installation groove 121 and / or the bottom of the installation groove 121. The control wire 300 is passed through the avoidance channel to move relative to the installation groove 121 and the deformation part 200.

[0078] Reference Figure 7 As shown, in some specific embodiments of the present invention, the device further includes: a connector 400 and a control member. The connector 400 is connected to the first end 140. The other end of the control wire 300 is passed through the connector 400 from the first end 140 and is located outside the connector 400. The control member is connected to one end of the control wire 300. It is worth noting that the control wire 300 is located outside the connector 400, and the control member facilitates medical personnel to control the control wire 300, making it more convenient to use.

[0079] Reference Figure 7 As shown, in some specific embodiments of the present invention, the connector 400 is provided with an annular groove, the control wire 300 can be wrapped around the annular groove, and the operating member can be snapped into the annular groove.

[0080] It is worth noting that after the drainage tube is inserted, the medical staff pulls the control wire 300 through the operating member and wraps the pulled control wire 300 around the annular groove. The operating member engages with the annular groove to secure the control wire 300. To remove the drainage tube, the operating member is separated from the annular groove and the control wire 300 is untied, so that the control wire 300 is relaxed from the taut state.

[0081] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A percutaneous transhepatic biliary puncture drainage tube, characterized in that: include: The tube body includes a flexible section and a pigtail section connected in sequence, wherein the end of the flexible section away from the pigtail section is a first end, the end of the pigtail section away from the flexible section is a second end, the end where the flexible section and the pigtail section are connected is a connecting end, and the outer side wall of the flexible section is provided with a mounting groove; a deformation portion disposed in the mounting slot, the deformation portion including a third end facing the first end and a fourth end facing the second end, the third end being connected to the mounting slot, and the fourth end being movable relative to the third end; a control wire, passing through the tube body and capable of controlling the bending of the pigtail segment, the control wire passing through the mounting slot and fixedly connected to the fourth end; The control wire is configured such that when the control wire is pulled out from the first end under the action of an external force, the pigtail section bends, the fourth end moves toward the third end, and forms a deformed protrusion protruding from the outer wall of the tube body; The length from the third end to the connecting end is L1, the length from the bile duct obstruction to the duodenum is L2, and the percutaneous transhepatic bile duct puncture drainage tube satisfies: L1≤L2; In which, the deformation part is configured as follows: when the drainage tube is inserted into a preset position in the human body, the deformation part passes through the obstruction, the control wire is subjected to external force, the pigtail section bends and stops at the connecting position between the bile duct and the duodenum, and the deformation protrusion abuts the end of the obstruction away from the first end.

2. The percutaneous transhepatic biliary drainage tube according to claim 1, wherein: The mounting groove is annular, and the deformable portion is sleeved on the mounting groove; or The installation groove is linear, and the deformation portion is arranged in the installation groove.

3. The percutaneous transhepatic biliary puncture drainage tube according to claim 1, characterized in that: The control wire is bonded to the fourth end; or, The fourth end is provided with a fixing hole, the control wire is passed through the fixing hole, and the control wire is bound to the fixing hole.

4. The percutaneous transhepatic biliary puncture drainage tube according to claim 1, characterized in that: Also includes: Multiple controlled wire splitting; The mounting groove is annular, and the deformable portion is sleeved on the mounting groove; The tube body further includes a plurality of control branch pipes communicating with the first end and the mounting groove, at least one control branch wire passing through one of the control branch pipes and connected to the fourth end. Wherein, at the fourth end, the control branch wires and the control wires are distributed in a circular pattern around the axis of the tube body.

5. The percutaneous transhepatic biliary puncture drainage tube according to claim 1, characterized in that: The tube wall of the tube body is provided with a control channel connected to the first end and connected to the outer wall of the connecting end. One end of the control wire is located outside the first end, and the other end is passed through the control channel and fixedly connected to the second end outside the second end. The control wire passes through the mounting groove and is fixedly connected to the fourth end. or, The tube body includes a drainage channel connecting the first end and the second end, a first control hole connected to the drainage channel at the connecting end, a second control hole connected to the drainage channel at the second end, a third control hole connected to the drainage channel at the side of the bottom of the mounting groove facing the second end, and a fourth control hole connected to the drainage channel at the side of the bottom of the mounting groove facing the first end; One end of the control wire passes through the drainage channel from the first end, passes through the outside of the tube body from the second control hole, then passes through the drainage channel from the first control hole, then passes through the outside of the tube body from the third control hole, and is passed through the fourth end, then passes through the drainage channel from the fourth control hole, and finally passes through the first end. The control wire is fixedly connected to the deformation part, and the other end of the control wire is fixed outside the first end.

6. The percutaneous transhepatic biliary puncture drainage tube according to claim 1, characterized in that: The tube wall of the tube body is provided with a control channel connected to the first end and connected to the outer wall of the connecting end. One end of the control wire is located outside the first end, and the other end is passed through the control channel and fixedly connected to the second end outside the second end. The control wire passes through the mounting groove and is fixedly connected to the fourth end. The control channel is divided into a first sub-channel and a second sub-channel by the mounting groove, and the first sub-channel is located between the first end and the mounting groove.

7. The percutaneous transhepatic biliary drainage tube according to claim 6, characterized in that: A side of the deformation portion facing the bottom of the installation groove and / or a groove bottom of the installation groove is provided with an avoidance channel, and the control wire is passed through the avoidance channel.

8. The percutaneous transhepatic biliary drainage tube according to claim 1, characterized in that: Also includes: A connector and a control member, wherein the connector is connected to the first end, the other end of the control wire is passed through the connector from the first end and is located outside the connector, and the control member is connected to one end of the control wire.

9. The percutaneous transhepatic biliary puncture drainage tube according to claim 8, characterized in that: The joint is provided with an annular groove, the control wire can be wrapped around the annular groove, and the operating member can be clamped in the annular groove.

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