Bile duct single-side wing self-falling support and support conveying system

Abstract

The utility model relates to a bile duct single-flank self-falling support and a support conveying system, the self-falling support comprises a hollow support main body, the support main body comprises a first bile duct support section, a second bile duct support section connected with the first bile duct support section, and a first through hole arranged at one end of the first bile duct support section; the single-side wing piece is arranged at one end of the first bile duct support section and located above the first through hole. Compared with the prior art, the device can automatically fall off along with intestinal tract movement, most patients do not need to be subjected to an operation, and the burden of the patients is relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical auxiliary equipment, and in particular relates to a bile duct single-wing self-detaching stent and a stent delivery system. Background Art

[0002] During surgical treatment of common bile duct stones or endoscopic transsphincteric lithotomy, biliary stents are often placed in the bile duct for bile drainage. Currently, the commonly used biliary stents in clinical practice are integrated plastic stents, that is, the stent, stent push tube and guide tube are integrated into one. The stent can be retrogradely placed into the duodenum and bile duct through an endoscope, or antegradely placed into the bile duct and duodenum through a common bile duct surgical incision. However, this integrated plastic stent is hard and is fixed in the bile duct by the barbs at both ends, so it cannot fall off by itself. It needs to be removed again through endoscopy after achieving the treatment or prevention purpose, which increases the patient's pain and treatment costs.

[0003] For example, CN219110584U discloses a gallbladder bile duct double drainage stent, including: a double drainage stent body, which is an inner hollow columnar structure, so that bile can flow out of the duodenum through the double drainage stent body of the inner hollow columnar structure. One end of the first bile duct stent segment is connected to one end of the bile duct stent segment. After using the endoscopic device, the doctor implants the other end of the first bile duct stent segment into the gallbladder through the cystic duct, and the bile duct stent segment is implanted into the bile duct, so that the bile in the gallbladder enters the bile duct stent segment through the first bile duct stent segment and is discharged into the duodenum; and the bile in the bile duct enters the bile duct stent segment through the multiple first through holes designed at the bottom of the bile duct stent segment, even if the outer wall of the bile duct stent segment fits the inner wall of the bile duct, the bile in the bile duct is discharged into the duodenum through the multiple first through holes designed at the bottom of the bile duct stent segment, so as to prevent blockage in the bile duct, which is beneficial to the patient's recovery. However, the drainage stent implanted in this application cannot fall off by itself and still needs to be removed after surgery, which increases the burden on patients. Utility Model Content

[0004] The purpose of the present invention is to provide a bile duct single-wing self-detachable stent and a stent delivery system in order to overcome the defects of the above-mentioned prior art. The self-detachable stent provided in the present application can fall off by itself with the peristalsis of the intestine, and the patient does not need to undergo surgery again.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The utility model provides a bile duct single-wing self-detaching stent, comprising:

[0007] A stent body with a hollow interior, comprising a first bile duct stent segment, a second bile duct stent segment connected to the first bile duct stent segment, and a first through hole arranged at one end of the first bile duct stent segment;

[0008] And a single-sided wing piece is arranged at one end of the first bile duct stent segment and above the first through hole.

[0009] Furthermore, one end of the first bile duct stent segment at the first through hole is bent.

[0010] Furthermore, the angle between the curved end of the first bile duct stent segment and the non-curved segment is 30-60°.

[0011] Furthermore, a plurality of second through holes are provided at an end of the second bile duct stent segment away from the first bile duct stent segment.

[0012] Furthermore, two second through holes are provided and arranged oppositely at the upper and lower ends of the second bile duct stent segment, and the planes where the two second through holes are located are parallel to each other.

[0013] Furthermore, the length of the stent body is 8-12 cm, and the diameter of the stent body is 7F.

[0014] Furthermore, the support body is made of polyethylene material, the length of the single-sided wing piece is 1-3 cm, and the shape of the single-sided wing piece is a pigtail shape.

[0015] This embodiment further provides a stent delivery system, comprising:

[0016] Inner core;

[0017] and a bile duct single-wing self-detaching stent as described above, which is sleeved on the outer surface of the inner core;

[0018] And a pusher which is sleeved on the outer surface of the inner core and is used to push the bile duct single-wing self-detaching stent.

[0019] Furthermore, the propeller includes a propulsion tube which is sleeved on the inner core and has a cavity, and a propulsion handle which is sleeved on the inner core and pressed against the bottom of the cavity of the propulsion tube.

[0020] Furthermore, a piston is provided at one end of the propulsion tube away from the propulsion handle;

[0021] A third through hole is provided at one end of the pushing tube away from the pushing handle, and the diameter of the third through hole is smaller than the inner diameter of the bile duct single-wing self-detaching stent.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] 1. The unilateral wing provided by the utility model is used to prevent the self-detaching stent from shifting in the bile duct, and under the action of intestinal peristalsis, it is conducive to the late dislocation of the self-detaching stent, without the need for additional surgery, thereby reducing the burden on patients.

[0024] 2. The second through hole provided by the utility model enhances the drainage effect and can be beneficial to the patient's postoperative healing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the self-detaching stent in Example 1.

[0026] Figure 2 Schematic diagram of the structure of the stent delivery system in Example 2.

[0027] Figure 3 This is a schematic diagram of the structure of the self-detaching stent in Example 3.

[0028] Figure 4 This is a schematic diagram of the structure of the stent delivery system in Example 4.

[0029] Figure 5 This is a schematic diagram of the structure of the stent delivery system in Example 5.

[0030] Numbers in the figure:

[0031] 1-stent body, 101-first bile duct stent segment, 102-second bile duct stent segment, 103-first through hole, 104-second through hole;

[0032] 2-unilateral wing;

[0033] 3-thruster, 301-thrust tube, 302-thrust handle, 303-piston, 304-fourth through hole;

[0034] 4-Inner core. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0036] Features such as component models, material names, connection structures, control methods, etc. that are not clearly stated in this technical solution shall be deemed as common technical features disclosed in the prior art.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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 should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "multiple" means two or more than two, unless otherwise specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a bolt connection or a welding connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment provides a bile duct single-wing self-detachable stent, including a stent body 1, which is hollow. The stent body 1 includes a first bile duct stent segment 101 and a second bile duct stent segment 102 connected to the first bile duct stent segment 101. The first bile duct stent segment 101 is implanted in the duodenum, and the second bile duct stent segment 102 is implanted in the bile duct. After implantation, the bile in the bile duct is discharged through the first bile duct stent segment 101 to the second bile duct stent segment 102, thereby playing a drainage role.

[0041] It should be noted that the bracket body 1 is made of polyethylene material.

[0042] In addition, a first through hole 103 is formed at one end of the first bile duct stent segment 101, and the self-detachable stent also includes a unilateral wing 2 arranged at one end of the first bile duct stent segment 101 and above the first through hole 103. The unilateral wing 2 is used to prevent the self-detachable stent from shifting in the bile duct and, under the action of intestinal peristalsis, facilitates the late dislocation of the self-detachable stent without the need for additional surgery, thereby reducing the burden on patients.

[0043] In addition, the second bile duct stent segment 102 is provided with two second through holes 104 at one end away from the first bile duct stent segment 101. There are two second through holes 104 and they are relatively arranged at the upper and lower ends of the second bile duct stent segment 102, and the planes where the two second through holes 104 are located are parallel to each other. The second through holes 104 enhance the drainage effect and can be beneficial to the patient's postoperative healing.

[0044] In this embodiment, the length of the stent body 1 is 10 cm, the diameter of the stent body 1 is 7F, the length of the single-sided wing piece 2 is 2 cm, and the shape of the single-sided wing piece 2 is a pigtail shape.

[0045] Example 2

[0046] like Figure 2 As shown, this embodiment provides a stent delivery system, including an inner core 4, the self-detachable stent in Example 1, and a pusher 3. The self-detachable stent in Example 1 is sleeved on the outer surface of the inner core 4, and the pusher 3 is sleeved on the outer surface of the inner core 4 and is used to push the single-wing self-detachable stent of the bile duct.

[0047] Specifically, the pusher 3 includes a push tube 301 which is sleeved on the inner core 4 and has a cavity, and a push handle 302 which is sleeved on the inner core 4 and pressed against the bottom of the cavity of the push tube 301. A piston 303 is provided at one end of the push tube 301 away from the push handle 302. A third through hole 304 is provided at one end of the push tube 301 away from the push handle 302. The diameter of the third through hole 304 is smaller than the inner diameter of the single-wing self-detaching stent of the bile duct.

[0048] When the present embodiment is working, the pushing handle 302 is used to push the pushing tube 301 , and then the pushing tube 301 presses against the self-detaching stent, and the self-detaching stent is placed into the bile duct, and then the pushing handle 302 is pushed back, and the pushing tube is withdrawn under the action of the piston 303 .

[0049] Example 3

[0050] like Figure 3 As shown, compared with Example 1, most of them are the same, except that the angle between the curved end and the non-curved section of the first bile duct stent segment 101 is 45°, and this design makes the first bile duct stent segment 101 more stable in the bile duct.

[0051] Example 4

[0052] like Figure 4 As shown, compared with Example 2, most of them are the same, except that the bile duct single-wing self-detachable stent is provided in Example 3.

[0053] Example 5

[0054] Embodiment 2 and embodiment 4 are used for advancing the choledochoscopic apparatus. Figure 5 As shown, when ERCP (endoscopic retrograde cholangiopancreatography) is used, the end where the first bile duct stent segment 101 is located is opposite to that in Example 2 and Example 4. At this time, it is more conducive to the detachment of the self-detached stent. The patient only needs to be followed up after the operation to confirm the detachment. There is no need to retain the nasobiliary duct for bile drainage, which reduces the patient's pain.

[0055] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A bile duct single-wing self-detaching stent, characterized in that: include: A stent body (1) having a hollow interior, comprising a first bile duct stent segment (101), a second bile duct stent segment (102) connected to the first bile duct stent segment (101), and a first through hole (103) arranged at one end of the first bile duct stent segment (101); And a single-sided wing piece (2) arranged at one end of the first bile duct stent segment (101) and above the first through hole (103).

2. A bile duct single-wing self-detaching stent according to claim 1, characterized in that: One end of the first bile duct stent segment (101) at the first through hole (103) is bent.

3. The bile duct single-wing self-detaching stent according to claim 2, characterized in that: The angle between the curved end of the first bile duct stent segment (101) and the non-curved segment is 30-60°.

4. The bile duct single-wing self-detaching stent according to claim 1, characterized in that: The second bile duct stent segment (102) is provided with a plurality of second through holes (104) at one end thereof away from the first bile duct stent segment (101).

5. The bile duct single-wing self-detaching stent according to claim 4, characterized in that: Two second through holes (104) are provided and arranged oppositely at the upper and lower ends of the second bile duct stent segment (102), and the planes where the two second through holes (104) are located are parallel to each other.

6. The bile duct single-wing self-detaching stent according to claim 1, characterized in that: The length of the stent body (1) is 8-12 cm, and the diameter of the stent body (1) is 7F.

7. The bile duct single-wing self-detaching stent according to claim 1, characterized in that: The support body (1) is made of polyethylene material, the length of the single-sided wing piece (2) is 1-3 cm, and the shape of the single-sided wing piece (2) is a pigtail shape.

8. A stent delivery system, characterized in that: include: Inner core (4); and a bile duct single-wing self-detaching stent as claimed in any one of claims 1 to 7, which is sleeved on the outer surface of the inner core (4); And a pusher (3) sleeved on the outer surface of the inner core (4) and used to push the bile duct single-wing self-detaching stent.

9. A stent delivery system according to claim 8, characterized in that: The propeller (3) comprises a propulsion tube (301) sleeved on the inner core (4) and having a cavity, and a propulsion handle (302) sleeved on the inner core (4) and pressed against the bottom of the cavity of the propulsion tube (301).

10. A stent delivery system according to claim 9, characterized in that: A piston (303) is provided at one end of the propulsion tube (301) away from the propulsion handle (302); A third through hole (304) is provided at one end of the pushing tube (301) away from the pushing handle (302), and the diameter of the third through hole (304) is smaller than the inner diameter of the bile duct single-wing self-detaching stent.

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