Anti-displacement bile duct stent

Abstract

The anti-displacement bile duct support comprises a supporting rod, a drainage tube section I, a drainage tube section II and a drainage tube section III, the drainage tube section I, the drainage tube section II and the drainage tube section III are sequentially connected from head to tail, the two ends of the supporting rod are connected with the drainage tube section I and the drainage tube section III respectively, and the drainage tube section II and the supporting rod are arranged in parallel and have elasticity. The arc-shaped spring can be relatively bounced off; communicated channels are formed in the drainage tube section I, the drainage tube section II and the drainage tube section III and are used for placing guide wires. The bile duct stent is placed in a common bile duct through an endoscope to drain bile, the drainage tube section II and the supporting tube are bounced off in an arc shape, and displacement of the bile duct stent can be avoided; and no damage is caused to the bile duct wall and the nipple mucosa in the stent taking-out process.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, it relates to a kind of anti-displacement bile duct stent. BACKGROUND

[0002] Endoscopic retrograde cholangiopancreatography (ERCP) is currently the preferred treatment method for treating common bile duct stones, obstructive jaundice, bile duct stenosis, pancreatitis and other diseases, with the advantages of small trauma, low complication rate, rapid recovery and the like. Endoscopic bile duct stent placement is a treatment method of ERCP, and placing a bile duct stent through an endoscope to drain bile can be used to treat obstructive jaundice, bile duct stenosis, bile leakage and other diseases, and can also prevent post-ERCP complications such as acute cholangitis and acute pancreatitis.

[0003] The bile duct stents currently used in clinical applications include integrated bile duct stents, which have displacement-preventing side wings at both ends of the stent, and have a low displacement rate. However, during the removal of the stent, the head-end side wings can easily scratch the bile duct wall and the duodenal papilla mucosa, inducing complications such as acute cholangitis, papilla bleeding, and acute pancreatitis. Single-pigtail bile duct stents have a pigtail-shaped structure at one end and a displacement-preventing side wing at the other end. The single-pigtail structure has good displacement-preventing effect when located inside the common bile duct. However, the single-pigtail structure is difficult to coil in a non-dilated common bile duct, and in addition, during the removal of the single-pigtail bile duct stent, the single-pigtail structure is straightened, and the head end of the stent can scratch the bile duct wall and the duodenal papilla mucosa, easily inducing complications such as acute cholangitis, papilla bleeding, and acute pancreatitis. Double-pigtail bile duct stents have a pigtail-shaped structure at both ends, and have good displacement-preventing effect. However, they have similar shortcomings as the single-pigtail bile duct stents. Christmas tree bile duct stents have multiple displacement-preventing side wings at both ends. Since the side wings only contact part of the bile duct wall, the side wings have poor stability, and in addition, during removal, the side wings can damage the bile duct wall and the duodenal papilla mucosa, inducing complications such as acute cholangitis, papilla bleeding, and acute pancreatitis. Lantern-shaped bile duct stents have a lantern structure at one end or both ends of the stent. Although the stent does not irritate the bile duct wall and the duodenal papilla during removal, the structure is slightly complex and needs to be guided by an internal support rod to be placed into the common bile duct. SUMMARY

[0004] According to the above technical problems, an anti-displacement bile duct stent is provided. The technical means adopted by the utility model are as follows:

[0005] The utility model provides a kind of anti-displacement biliary stent, including: support rod and drainage pipe section I, drainage pipe section II and drainage pipe section III are sequentially connected from head to tail, the both ends of the support rod are connected with drainage pipe section I and drainage pipe section III respectively, drainage pipe section II and support rod are in parallel, both have elasticity, can be arc and relatively elastic open;The inside of drainage pipe section I, drainage pipe section II and drainage pipe section III is opened with the passage of communication, for placing guide wire.

[0006] Further, the head end of the drainage pipe section I is frustoconical.

[0007] Further, the tail end of the drainage pipe section III is frustoconical.

[0008] Further, the pipe wall of the drainage pipe section I is provided with the first side hole communicated with the internal passage.

[0009] Further, the pipe wall of the drainage pipe section II is provided with a plurality of second side holes communicated with the internal passage.

[0010] Further, the pipe wall of the drainage pipe section III is provided with the third side hole communicated with the internal passage.

[0011] Further, the pipe wall of the drainage pipe section III is provided with the anti-displacement side wing.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1, the intermediate bile duct and support rod of the utility model are arc-shaped, and are naturally elastic after being placed into common bile duct, rely on the tension of self to bile duct wall, and play the anti-displacement role.

[0014] 2, the utility model does not need the assistance of internal support tube, and can be placed into common bile duct by propeller or papillary sphincter knife under the guidance of guide wire, and has better passability.

[0015] Based on the above reasons, the utility model can be widely popularized in the field of medical treatment. DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the following embodiment or prior art description will be simply introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without paying the creative labor.

[0017] Figure 1 It is the structural schematic diagram of the utility model.

[0018] Figure 2 It is the schematic diagram of the guide wire of the utility model.

[0019] In the figure: 1, drainage tube segment I; 11, first side hole; 2, support rod; 3, drainage tube segment II; 31, second side hole; 4, drainage tube segment III; 41, third side hole; 42, anti-displacement side wing. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0021] The present application provides a kind of anti-displacement biliary stent, including support rod 2 and from head to tail sequentially connected drainage tube segment I 1, drainage tube segment II 3 and drainage tube segment III 4, the both ends of support rod 2 are connected with drainage tube segment I 1 and drainage tube segment III 4, drainage tube segment II 3 and support rod 2 are connected in parallel, both have elasticity, can be arc relative to open up;Support rod 2 is located in the outside of drainage tube segment II 3.Drainage tube segment I 1, drainage tube segment II 3 and drainage tube segment III 4 are internally provided with the channel for placing guide wire.

[0022] Wherein the head end of drainage tube segment I 1 and the tail end of drainage tube segment III 4 are all truncated cone, drainage tube segment I 1 and drainage tube segment III 4 are each provided with a side hole on the pipe wall and are connected with internal channel, and are first side hole 11 and third side hole 41 respectively.Drainage tube segment III 4 is provided with anti-displacement side wing 42 on the pipe wall.Drainage tube segment II 3 is provided with a plurality of second side holes 31 on the pipe wall and is connected with internal channel.

[0023] The present application is placed into common bile duct by endoscope to drain bile, drainage tube segment II and support tube are arc and open up, which can avoid the displacement of biliary stent;The biliary wall and nipple mucosa are not damaged during the process of removing the stent.

[0024] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them;Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features;And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A migration resistant biliary stent, characterized by, The utility model relates to a drainage tube with three segments and a support rod, comprising: A support rod (2) and drainage tube segments I (1), II (3) and III (4) connected in sequence from head to tail, both ends of the support rod (2) are connected with the drainage tube segment I (1) and the drainage tube segment III (4) respectively, the drainage tube segment II (3) and the support rod (2) are arranged in parallel and both have elasticity and can be relatively opened in an arc shape; the drainage tube segment I (1), the drainage tube segment II (3) and the drainage tube segment III (4) are internally provided with a communicating channel for placing a guide wire.

2. The migration resistant biliary stent of claim 1, wherein, The head end of the drainage tube segment I (1) is in the shape of a circular truncated cone.

3. The migration resistant biliary stent of claim 1, wherein, The tail end of the drainage tube segment III (4) is in the shape of a circular truncated cone.

4. The migration-resistant biliary stent of claim 1, wherein, A first side hole (11) is arranged on the tube wall of the drainage tube segment I (1) and communicates with the internal channel.

5. The migration-resistant biliary stent of claim 1, wherein, A plurality of second side holes (31) are arranged on the tube wall of the drainage tube segment II (3) and communicate with the internal channel.

6. The migration-resistant biliary stent of claim 1, wherein, A third side hole (41) is arranged on the tube wall of the drainage tube segment III (4) and communicates with the internal channel.

7. The migration resistant biliary stent of claim 1, wherein, A displacement-preventing side wing (42) is arranged on the tube wall of the drainage tube segment III (4).

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