Biliary tract drainage device

Abstract

The biliary tract drainage device comprises a first drainage piece and a second drainage piece, the first drainage piece and the second drainage piece are communicated through an external bile storage piece, the second drainage piece is arranged on the first drainage piece in a penetrating mode, one end of the first drainage piece is fixed to the outer side wall of the second drainage piece, and a notch is formed in the first drainage piece; the first drainage piece can move forwards relative to the second drainage piece, and when the first drainage piece moves forwards relative to the second drainage piece, the side wall, provided with the notches, of the first drainage piece can be arched outwards to form an arched part. The external drainage tube can be simply and conveniently fixed in the body during drainage.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a biliary drainage device. Background Art

[0002] Biliary obstruction refers to mechanical obstruction of any section of the bile excretion tract, which is caused by lesions in the bile duct cavity, diseases of the duct wall itself, infiltration and compression outside the duct wall, etc., resulting in poor bile excretion or even complete blockage. At present, the conventional treatment for bile duct obstruction is percutaneous hepatic biliary drainage, which is to use a special puncture needle to penetrate the intrahepatic bile duct percutaneously under the guidance of X-ray or B-ultrasound, inject contrast agent, and quickly visualize the intrahepatic and extrahepatic bile ducts, and then place a drainage tube to relieve obstruction symptoms.

[0003] Existing bile duct drainage tubes are divided into three categories, namely, external drainage tubes, internal drainage tubes, and internal and external drainage tubes. Among them, the external drainage tubes of the existing internal and external drainage tubes are not easy to fix in the body during drainage, and drainage displacement is prone to occur; even if there is an additional fixing structure to fix the external drainage tube in the body, the additional fixing structure is complicated to install and troublesome to fix. Summary of the invention

[0004] In order to solve at least one of the problems mentioned in the above background technology, the present invention provides a biliary drainage device, which can simply and conveniently fix the drainage tube in the body during drainage.

[0005] The specific technical solutions provided by the present invention are as follows:

[0006] A biliary drainage device is provided, comprising a first drainage piece and a second drainage piece, the first drainage piece and the second drainage piece are connected through an external bile storage piece, the second drainage piece is passed through the first drainage piece, one end of the first drainage piece is fixed to the outer side wall of the second drainage piece, the first drainage piece is provided with a cutout, the first drainage piece can move forward relative to the second drainage piece, and when the first drainage piece moves forward relative to the second drainage piece, the side wall of the first drainage piece with the cutout can arch outward to form an arched portion.

[0007] By means of the above technical scheme, the present invention fixes one end of the first drainage piece to the outer wall of the second drainage piece and provides an incision on the first drainage piece, so that during drainage, the first drainage piece moves forward relative to the second drainage piece, and the side wall of the first drainage piece with the incision is squeezed to arch outward to form an arched portion, and the arched portion can be supported in the bile duct, thereby fixing the first drainage piece in the body to avoid displacement and falling off, and the fixation is simple and convenient without the need for an additional fixing structure; during drainage, bile is introduced into the bile storage piece through the first drainage piece, and when reinjection is required, the bile in the bile storage piece is introduced into the duodenum through the second drainage piece, thereby realizing the reflux of bile according to physiological needs.

[0008] As a preferred embodiment of the above solution, the first flow guiding member can move backward relative to the second flow guiding member, and when the first flow guiding member moves backward relative to the second flow guiding member, the arched portion can return to its original shape.

[0009] As a preferred embodiment of the above scheme, a first drainage cavity is provided in the first drainage piece, and a second drainage cavity is provided in the second drainage piece. The first drainage cavity and the second drainage cavity are connected to the first drainage cavity through a connecting incision of the bile storage piece. There are at least two incisions, and at least two incisions are distributed along the circumference of the first drainage piece.

[0010] As a preferred embodiment of the above scheme, the biliary drainage device also includes a first connecting member and a second connecting member, the first connecting member is connected to the first drainage member, and the second connecting member is connected to the second drainage member, and the first drainage member is driven to move forward and backward relative to the second drainage member by the first connecting member moving forward and backward relative to the second connecting member.

[0011] As a preferred embodiment of the above solution, the first connecting member and the second connecting member are slidingly connected or threadedly connected.

[0012] As a preferred embodiment of the above solution, when the first connecting member and the second connecting member are threadedly connected, the first connecting member is rotationally connected to the first flow guiding member, and / or the second connecting member is rotationally connected to the second flow guiding member.

[0013] As a preferred embodiment of the above solution, a first inner cavity is provided in the first connecting member, and the first inner cavity is communicated with the first guiding member; a second inner cavity is provided in the second connecting member, and the second inner cavity is communicated with the second guiding member.

[0014] As a preferred embodiment of the above solution, the biliary drainage device further comprises a connecting channel, the first inner cavity is connected to the bile storage element through the connecting channel, and the bile storage element is connected to the second inner cavity.

[0015] As a preferred embodiment of the above solution, the second drainage member is inserted into the first drainage cavity, the front portion of the second drainage member extends out of the first drainage cavity and is provided with a second drainage hole, and the second drainage hole is connected to the second drainage cavity.

[0016] As a preferred embodiment of the above solution, a first drainage hole communicating with the first drainage cavity is provided at the front portion of the first drainage member. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1It is a structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the first flow-guiding member of the present invention arching outwards;

[0020] Figure 3 It is a structural schematic diagram of the arched portion of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the arched portion of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the arched portion of the present invention;

[0023] Figure 6 It is a schematic structural diagram of the front portion of the second flow guide member of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more centered elements can exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more centered elements can exist between them. The terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, which is 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. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] As described in the background technology, existing biliary drainage tubes are divided into three categories. The first is an external drainage tube, which is to drain bile from the bile duct to the outside of the body through a drainage tube. Its advantage is that the operation is relatively simple and it is suitable for patients with poor general conditions and who cannot tolerate long-term operations, multiple bile duct obstructions or obvious infections. It can also be used for preparation before bile duct stent placement. The main disadvantages are that the stability is slightly poor, the drainage tube is easy to fall out, and long-term drainage is easy to cause electrolyte disorders and affect the patient's quality of life. The second is an internal drainage tube, which is to drain bile from the bile duct to the duodenum through a drainage tube. It allows it to participate in the food digestion process in the duodenum. Its main advantages are no loss of electrolytes and fluids, no external drainage bag, and the patient's quality of life is higher. The disadvantage is that the bile is directly drained into the duodenum, which is not conducive to the pressure control of the bile duct and is not in line with the normal physiological digestion process. In addition, there is a risk of restenosis; the third is the internal and external drainage tube, that is, the bile can be drained out of the body from the bile duct, or it can flow from the bile duct to the duodenum through the drainage tube. Compared with the external drainage tube, the internal and external drainage tube can reduce bile loss, and the bile flow direction is more in line with the physiological process.

[0027] However, the existing internal and external drainage tubes are not easy to fix in the body during drainage, and drainage displacement is prone to occur; even if there is an additional fixing structure to fix the external drainage tube, the additional fixing structure is complicated to install and troublesome to fix, and the existence of the fixing structure also hinders the drainage tube from being quickly withdrawn from the body. In the present invention, when the first drainage piece moves forward relative to the second drainage piece, the side wall of the first drainage piece with incisions arches outward to form an arched portion, and the arched portion can support the first drainage piece in the bile duct to fix it, so that the first drainage piece can be simply and conveniently fixed in the body during drainage. At the same time, after the drainage is completed, the first drainage piece moves backward relative to the second drainage piece, and the arched portion can return to its original shape, that is, the first drainage piece returns to a tubular shape, so that the first drainage piece can be quickly withdrawn from the body. The embodiments of the present invention are explained in detail below. Among them, the front in the embodiments of the present invention refers to Figure 1 In the direction of the arrow in the figure, the outside in this embodiment refers to the outside of the first drainage member relative to the first drainage cavity.

[0028] See also Figure 1A biliary drainage device according to the present invention comprises a first drainage piece 1 and a second drainage piece 2, the first drainage piece 1 and the second drainage piece 2 are connected through an external bile storage piece (not shown), the second drainage piece 2 is arranged in the first drainage piece 1, the front end of the first drainage piece 1 is fixed to the outer wall of the second drainage piece 2, the front part of the first drainage piece 1 is provided with a cutout 11, the first drainage piece 1 can move forward and backward relative to the second drainage piece 2, and when the first drainage piece 1 moves forward relative to the second drainage piece 2, the side wall of the first drainage piece 1 near the cutout 11 can be arched outward to form an arched portion 12, and the arched portion 12 is supported in the bile duct and plays a fixing role on the first drainage member 1. When the first drainage member 1 moves backward relative to the second drainage member 2, the arched portion 12 can be restored to its original shape. The front part of the first drainage member 1 is made of a flexible and elastic material, specifically TPU (thermoplastic polyurethane elastomer). This not only avoids the arched portion 12 from damaging the bile duct when fixing the first drainage member 1, but also facilitates the arched portion 12 to quickly retract and restore to its original shape when the first drainage member 1 and the second drainage member 2 are withdrawn from the body, further facilitating the first drainage member 1 and the second drainage member 2 to quickly withdraw from the body. A first drainage cavity 13 is provided in the first drainage member 1, and a second drainage cavity 21 is provided in the second drainage member 2. The first drainage cavity 13 and the second drainage cavity 21 are separated from each other. The first drainage cavity 13 and the second drainage cavity 21 are connected through an external bile storage member. The first drainage cavity 13 is used for collecting bile, and the second drainage cavity 21 is used for releasing bile.

[0029] In this embodiment, the first drainage member 1 is a first drainage tube, specifically an outer drainage tube, and the second drainage member 2 is a second drainage tube, specifically an inner drainage tube. The axes of the first drainage member 1 and the second drainage member 2 coincide, and the front end of the first drainage member 1 is fixed on the outer wall of the second drainage member 2. The front part of the first drainage member 1 is provided with a first drainage hole 14 connected to the first drainage cavity 13, and the second drainage member 2 is penetrated through the first drainage cavity 13. The front part of the second drainage member 2 extends out of the first drainage cavity 13 and is provided with a second drainage hole 22, and the second drainage hole 22 is connected to the second drainage cavity 21. In clinical practice, the front part of the first drainage member 1 is placed in the patient's bile duct, and the bile in the bile duct can smoothly pass through the incision 11 or the first drainage hole 14 into the first drainage cavity 13 under the action of pressure, and form a continuous liquid flow driven by the pressure in the bile to enter the bile storage member; the front part of the second drainage member 2 is placed in the patient's duodenum, and during reinjection, the bile in the bile storage member is released into the duodenum through the second drainage cavity 21 and the second drainage hole 22. The front part of the second drainage member 2 is a flexible hose, see Figure 6 (b) Figure 6 (c) The front portion of the second drainage member 2 can be curved. When in use, a matching ejector pin (not shown) is inserted into the second drainage cavity 21 to deform the curved second drainage member 2 into a straight state. Figure 6(a), the second drainage piece 2 is then sent into the duodenum, and then the ejector pin is taken out from the second drainage piece 2, so that the second drainage piece 2 gradually returns to the bent state. The second drainage piece 2 in the arc-shaped bent state can play a certain fixing role and prevent the second drainage piece 2 from slipping out of the duodenum.

[0030] The incision 11 is connected to the first drainage cavity 13, so that the setting of the incision 11 not only provides an escape hole when the side wall of the first drainage member 1 arches outward, but also the incision 11 can serve as a bile drainage port, that is, bile enters the first drainage cavity 13 through the incision 11. The length direction of the incision 11 extends along the axial direction of the first drainage member 1, so that the arched portion 12 has a larger area, which is more conducive to the fixation of the first drainage member 1 in the bile duct. When the incision 11 extends along the axial direction of the first drainage member 1, it can pass through the front end of the first drainage member 1 (that is, pass through the end where the first drainage member 1 and the second drainage member 2 are fixed), or it can be set not to pass through the front end of the first drainage member 1. The incision 11 in this embodiment does not pass through the front end of the first drainage member 1, and a plurality of first drainage holes 14 are provided on the tube wall of the first drainage member 1 between the incision 11 and the front end of the first drainage member 1. The incision 11 and the first drainage holes 14 cooperate to drain the bile to accelerate the collection of bile in the bile duct, relieve the bile duct pressure, and achieve smoother bile drainage.

[0031] There are at least two cutouts 11, and the at least two cutouts 11 are distributed along the circumference of the first flow guiding member 1. In this embodiment, preferably, the at least two cutouts 11 are evenly distributed along the radial direction of the first flow guiding member 1. The at least two cutouts 11 are provided so that the side wall of the first flow guiding member 1 near the cutouts 11 is more likely to bulge outward when the first flow guiding member 1 moves forward relative to the second flow guiding member 2. Figure 2 , Figure 3 , when observing the first guide member 1 from the front to the back when the first guide member 1 is arched, the first guide member 1 is in a flower-like shape, and the arched portion 12 is in a petal-like shape. Figure 3 (a) Figure 4 (a), when there are two cutouts 11, the number of corresponding arched portions 12 is also two, see Figure 3 (b) Figure 4 (b), when the number of the cutouts 11 is three, the number of the corresponding arched portions 12 is also three, see Figure 3 (c) Figure 4 (c) When the number of incisions 11 is four, the number of corresponding arched portions 12 is also four, and the number of incisions 11 can be set according to the actual situation of bile duct drainage. Figure 3 The shape of the middle arched portion 12, the cutout 11 can be a straight cut on the tube wall of the first flow guiding member 1, that is, the tube wall of the first flow guiding member 1 is not cut off; see Figure 4The shape of the middle arched portion 12, the cutout 11 can also be a cutout 11 with a shape cut on the tube wall of the first flow guiding member 1, such as a rectangular, arc-shaped, elliptical, etc., that is, the tube wall part of the first flow guiding member 1 is cut off. Figure 5 In this embodiment, first drainage holes 14 may also be provided on the tube wall of the first drainage member 1 between the cutouts 11, that is, first drainage holes 14 are provided on the arched portion 12, and the number of the first drainage holes 14 on the arched portion 12 depends on actual drainage requirements.

[0032] See also Figure 1 , Figure 2 The biliary drainage device further includes a first connecting member 4 and a second connecting member 5, wherein the first connecting member 4 is connected to the first drainage member 1, and the second connecting member 5 is connected to the second drainage member 2. The first connecting member 4 moves forward and backward relative to the second connecting member 5, driving the first drainage member 1 to move forward and backward relative to the second drainage member 2, such as a sliding connection between the first connecting member 4 and the second connecting member 5, or a threaded connection between the first connecting member 4 and the second connecting member 5. In this embodiment, the first connecting member 4 is an outer tube seat, and the second connecting member 5 is an inner tube seat. The first connecting member 4 is provided with a first inner cavity 41, which is communicated with the first drainage cavity 13. The second connecting member 5 is provided with a second inner cavity 51, which is communicated with the second drainage cavity 21. The second connecting member 5 is disposed in the first connecting member 4, and the rear portion of the second drainage member 2 is disposed in the first inner cavity 41, and the second drainage member 2 extends forward from the first inner cavity 41 and extends into the first drainage cavity 13. When the first connecting member 4 and the second connecting member 5 are slidingly connected, a slide groove (not shown) can be provided at the rear end of the first connecting member 4, and the slide groove is separated from the first inner cavity 41 in the first connecting member 4 to prevent bile leakage. The second connecting member 5 extends into the slide groove and can slide back and forth along the slide groove. A guide groove can also be provided on the inner wall of the slide groove. A guide block (not shown) can be provided on the outer wall of the second connecting member 5, and the guide block is provided in the guide groove and slides back and forth along the guide groove.

[0033] See also Figure 1 , Figure 2In this embodiment, the first connecting member 4 and the second connecting member 5 are threadedly connected, and the rear end of the first connecting member 4 is provided with a threaded hole 42, and the threaded hole 42 is separated from the first inner cavity 41 in the first connecting member 4 to prevent bile leakage. The outer wall of the second connecting member 5 is provided with a thread 52, and the second connecting member 5 is threadedly connected to the threaded hole 42 through the thread 52. At this time, the first connecting member 4 is rotatably connected to the first drainage member 1, and / or the second connecting member 5 is rotatably connected to the second drainage member 2. When in use, the first connecting member 4 and the first drainage member 1 can be fixed, and the second connecting member 5 can be rotated backward. In this way, when the first drainage member 1 moves forward relative to the second drainage member 2, the first drainage member near the incision 11 is The side wall of the flow member 1 arches outward to form an arched portion 12. At this time, the second connecting member 5 needs to be rotatably connected to the second drainage member 2, and a rotating sealing structure (not shown) is set between the second connecting member 5 and the second drainage member 2 to prevent bile leakage during drainage; the second connecting member 5 and the second drainage member 2 can also be fixed, and the first connecting member 4 rotates forward. In this way, when the first drainage member 1 moves forward relative to the second drainage member 2, the side wall of the first drainage member 1 near the incision 11 arches outward to form an arched portion 12. At this time, the first connecting member 4 needs to be rotatably connected to the first drainage member 1, and a rotating sealing structure (not shown) is set between the first connecting member 4 and the first drainage member 1 to prevent bile leakage during drainage.

[0034] The bile duct drainage device further includes a connecting channel 6, through which the first inner cavity 41 is connected to the bile storage element, and the bile storage element is connected to the second inner cavity 41. In this embodiment, the bile storage element is a bile storage bag, which is used to store bile drained from the bile duct, and the bile storage bag can be a sealed bag made of plastic. Figure 1 The angle between the connecting channel 6 and the rear part of the first connecting seat 4 is an acute angle. The connecting channel 6 and the first connecting seat 4 form a Y-shaped structure. The connecting channel 6, the first connecting seat 4, the second connecting seat 5, the first guide member 1 and the second guide member 2 also form a Y-shaped structure as a whole. The biliary drainage device also includes a first joint assembly 7 and a second joint assembly 8. The connecting channel 6 is connected to the bile storage element through the first joint assembly 7, and the second inner cavity 51 is connected to the bile storage element through the second joint assembly 8. The first joint assembly 7 is detachably connected to the connecting channel 6, the second joint assembly 8 is detachably connected to the second connecting element 5, and the bile storage element is detachably connected to the first joint assembly 7. The bile storage element can be detachably connected to the second joint assembly 8 through an additionally arranged reflux assembly (not shown). The above-mentioned detachable connection method includes but is not limited to threaded connection, snap connection, tight sleeve connection, etc. The reflux assembly may include a reflux pipe and an injector on the reflux pipe. The reflux pipe is connected to the through hole for reflux on the bile storage element. The bile in the bile storage element can flow out from the through hole to the reflux pipe under the drive of the injector, and then be injected back into the duodenum through the second joint assembly 8, the second inner cavity 51, and the second drainage cavity 21.

[0035] See also Figure 2 When the present invention is used, the front part of the first drainage piece 1 is placed in the patient's bile duct, and the front part of the second drainage piece 2 is placed in the patient's duodenum. The first drainage piece 1 moves forward relative to the second drainage piece 2, and the front side wall of the first drainage piece 1 near the incision 11 is squeezed and arched outward to form an arched portion 12. The arched portion 12 can be supported in the bile duct, so that the first drainage piece 1 and the second drainage piece 2 are fixed in the body to avoid displacement and falling off. The fixation is simple and convenient, and no additional fixing structure is required. During drainage, the bile in the bile duct can smoothly pass through the incision 11 or the first drainage hole 14 into the first drainage cavity 13 through the pressure, and form a continuous liquid flow driven by the pressure in the bile, and pass through the first drainage cavity in turn. 13. The first inner cavity 41, the connecting channel 6 and the first joint assembly 7 enter the bile storage member; during reinjection, the bile in the bile storage member can be released into the duodenum through the reflux assembly in sequence through the second joint assembly 8, the second inner cavity 51, the second drainage cavity 21 and the second drainage hole 22, so that the bile can flow back according to physiological needs. This not only reduces the loss of bile, but also allows the bile to flow to the internal and external drainage tubes that conform to the normal digestive process, thereby reducing the risk of intestinal fluid reflux infection and having greater clinical value. After the drainage is completed, the first drainage member 1 moves backward relative to the second drainage member 2, so that the arched portion 12 can be restored to its original shape, the first drainage member 1 returns to a tubular shape, and the first drainage member 1 and the second drainage member 2 can be quickly withdrawn from the body.

[0036] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0037] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A biliary drainage device, characterized in that: The invention comprises a first flow guide member (1) and a second flow guide member (2), wherein the first flow guide member (1) and the second flow guide member (2) are connected via an external bile storage member, the second flow guide member (2) is inserted into the first flow guide member (1), one end of the first flow guide member (1) is fixed to the outer wall of the second flow guide member (2), the first flow guide member (1) is provided with a cutout (11), the first flow guide member (1) can move forward relative to the second flow guide member (2), and when the first flow guide member (1) moves forward relative to the second flow guide member (2), the side wall of the first flow guide member (1) on which the cutout (11) is distributed can arch outward to form an arched portion (12).

2. The biliary drainage device according to claim 1, characterized in that: The first flow guiding member (1) can move backwards relative to the second flow guiding member (2), and when the first flow guiding member (1) moves backwards relative to the second flow guiding member (2), the arched portion (12) can return to its original shape.

3. The biliary drainage device according to claim 1, characterized in that: The first drainage member (1) is provided with a first drainage cavity (13), the second drainage member (2) is provided with a second drainage cavity (21), the first drainage cavity (13) and the second drainage cavity (21) are connected via the bile storage member, the incision (11) is connected with the first drainage cavity (13), at least two incisions (11) are provided, and at least two incisions (11) are distributed along the circumference of the first drainage member (1).

4. The biliary drainage device according to claim 1, characterized in that: The invention also comprises a first connecting member (4) and a second connecting member (5), wherein the first connecting member (4) is connected to the first flow guiding member (1), and the second connecting member (5) is connected to the second flow guiding member (2), and the first flow guiding member (1) is driven to move forward and backward relative to the second flow guiding member (2) by the first connecting member (4) moving forward and backward relative to the second connecting member (5).

5. The biliary drainage device according to claim 4, characterized in that: The first connecting member (4) and the second connecting member (5) are connected by sliding or threading.

6. The biliary drainage device according to claim 5, characterized in that: When the first connecting member (4) and the second connecting member (5) are threadedly connected, the first connecting member (4) is rotationally connected to the first flow guiding member (1), and / or the second connecting member (5) is rotationally connected to the second flow guiding member (2).

7. The biliary drainage device according to claim 3, characterized in that: The first connecting member (4) is provided with a first inner cavity (41), the first inner cavity (41) being in communication with the first flow guiding member (1), and the second connecting member (5) is provided with a second inner cavity (51), the second inner cavity (51) being in communication with the second flow guiding member (2).

8. The biliary drainage device according to claim 7, characterized in that: It also comprises a connecting channel (6), through which the first inner cavity (41) is communicated with the bile storage element, and the bile storage element is communicated with the second inner cavity (51).

9. The biliary drainage device according to claim 3, characterized in that: The second drainage member (2) is inserted into the first drainage cavity (13), the front portion of the second drainage member (2) extends out of the first drainage cavity (13) and is provided with a second drainage hole (22), and the second drainage hole (22) is connected to the second drainage cavity (21).

10. The biliary drainage device according to claim 3, characterized in that: The front part of the first drainage member (1) is provided with a first drainage hole (14) which is in communication with the first drainage cavity (13).

Images