CN212879695U

Movatterモバイル変換

Info

Publication number: CN212879695U
Application number: CN202020763484.6U
Authority: CN
Inventors: 张�诚
Original assignee: Shanghai East Hospital
Current assignee: Shanghai East Hospital
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2021-04-06
Anticipated expiration: 2030-05-09

Abstract

本实用新型提供一种全覆膜自膨式可取样胆道金属支架，包括：支架本体、回收线和装配线；支架本体由镍钛合金丝编织而成，呈网格状；支架本体的两端呈球形，体部呈圆柱形；支架本体的两端的内表面和外表面均覆有硅胶膜，支架本体的体部内外间断覆有硅胶膜；体部上设有具有纵行走形的条状裸露区，使肿瘤组织经裸露区长入支架本体内；回收线为环形金属丝，其一端穿绕支架本体头端的合金丝，另一端经支架本体腔内引出；装配线为环形金属丝，穿绕支架本体末端的合金丝。本实用新型可完全置入到胆总管内或越过十二指肠乳头，用于支架胆管良恶性狭窄，完全位于胆总管内则不破坏胆总管的密闭性，术后发生支架堵塞及反流性胆管炎的概率低。

The utility model provides a fully covered self-expandable bile duct metal stent for sampling, comprising: a stent body, a recovery line and an assembly line; the stent body is woven from nickel-titanium alloy wire and is in the shape of a grid; Spherical, the body is cylindrical; the inner and outer surfaces of both ends of the stent body are covered with silica gel films, and the body of the stent body is intermittently covered with silica gel films; , so that the tumor tissue grows into the stent body through the exposed area; the recovery line is a ring wire, one end of which is passed through the alloy wire at the head end of the stent body, and the other end is drawn out through the cavity of the stent body; the assembly line is a ring metal wire, which is passed around the stent body Alloy wire at the end. The utility model can be completely inserted into the common bile duct or cross the duodenal papilla, and is used for stents for benign and malignant stenosis of the bile duct. It is completely located in the common bile duct without destroying the airtightness of the common bile duct, causing stent blockage and reflux after operation. Cholangitis is less likely.

Description

Full-film-covering self-expanding sampling biliary tract metal stent

Technical Field

The utility model relates to a wicresoft medical technology and surgical instruments technical field especially relate to a full tectorial membrane is from expanding can sampling biliary tract metal support, is one kind and is used for treating good malignant stenosis disease of biliary tract system to can keep the wicresoft's surgical instruments under the duodenoscope of getting the tissue sample.

Background

Extrahepatic bile duct stenosis is a common and frequently encountered disease in clinic, and the pathological type of stenosis plays a key role in clinical treatment scheme and prognosis. How to obtain the histopathology of a narrow part is the key point of clinical research, wherein the most direct is surgical operation, narrow bile ducts are cut off in the operation to obtain tissues, and quick freezing inspection in the operation is carried out, but the specificity and the sensitivity of the quick freezing are both less than 100%, certain false positive and false negative results exist, secondly, choleenteroanastomosis operation is carried out on patients with the amphoteric stenosis, and near-far-term complications such as anastomotic stenosis, intrahepatic bile duct calculi, bile duct cancer and the like exist after the operation.

With the development of endoscopic technology, the cell brush technology under the endoscope becomes an important mode for sampling bile duct stenosis, and bile duct mucosa tissues are repeatedly brushed at the stenosis part by the cell brush to obtain the mucosa tissues, but the obtained tissue pathology is less, the obtained tissue is surface mucosa tissues, and the positive rate is only 30%. In recent years, a Spyglass sub-scope technology appears, the sub-scope can enter a biliary tract to observe a narrow part, a biopsy forceps is placed to take tissue pathology, the taken tissue is small and small as the sub-scope forceps channel is thin, the tissue in the deep layer of a mucous membrane cannot be taken out, and the positive rate is still low.

In order to obtain more tissue specimens, a local membrane covered bile duct sampling metal stent is reported in the prior art, the metal stent can relieve bile duct stenosis, and the cutting effect of a metal grid on pathological changes in a bile duct can be utilized to obtain histopathology. However, the metal stent used for the treatment of the bile duct stenosis and the acquisition of the tissue has the following disadvantages: (1) the surfaces of two ends of the metal bracket are covered with silica gel films, and the bracket body is not provided with the silica gel films, so that the exposed section is difficult to determine to be positioned in the area of the tumor due to lack of positioning; (2) the metal stent body is not provided with a silica gel membrane, and tumor tissues grow into the stent through meshes, so that biliary tract obstruction can be caused again; (3) the metal stent is completely placed in the common bile duct, and traction work such as a recovery line is lacked, so that the difficulty in taking out the stent is increased; (4) the metal stent body has no silica gel membrane, a large amount of tumor tissues grow into the stent cavity, the stent is taken out, so that the tumor tissues in the stent cavity and the tumor tissues outside the stent can be quickly separated, and the risk of bile duct hemorrhage exists while the tissues are obtained; (5) after the stent is completely released, the wall of the bile duct has compression effect on the stent, and the tumor tissue grows into the lumen of the stent, so that the resistance of taking out the stent is increased; (6) in the process of taking out the stent, the reduction of tissues can be caused in the friction process of the surface of the stent, the wall of a bile duct and an endoscope channel, and the scraped tissues are deep tissues, so that the positive rate of pathology is reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned technical problems, a fully-covered self-expandable biliary tract metal stent is provided. The utility model mainly utilizes the bracket body with spherical two ends to prevent the metal bracket from shifting, and has small stimulation to the mucous membrane, and the two ends of the bracket body can not be wrapped by the mucous membrane; the withdrawing resistance of the metal bracket is reduced through the recovery wire; the longitudinal naked area is arranged in the middle of the body part of the bracket body, so that tumor tissues can conveniently grow into the bracket body through the metal meshes in the naked area, the naked area is limited, and the incidence rate of tumor bleeding in the process of taking out the bracket is reduced while tissue specimens are obtained; the metal stent can be assembled into the full-film-covered self-expanding metal stent releasing and recovering device through an assembly line. The utility model discloses a technical means as follows:

a full-film self-expandable sampling biliary tract metal stent comprises: the device comprises a bracket body, a recovery line and an assembly line;

the stent body is formed by weaving nickel-titanium alloy wires and is in a grid shape; the two ends of the bracket body are spherical, and the body part is cylindrical;

the inner surface and the outer surface of the two ends of the bracket body are respectively coated with a silica gel film, and the inner part and the outer part of the body part of the bracket body are discontinuously coated with the silica gel films; the body part is provided with a strip-shaped exposed area with a longitudinal walking shape, so that tumor tissues grow into the stent body through the exposed area;

the recovery wire is an annular metal wire, one end of the recovery wire penetrates through the alloy wire at the head end of the bracket body, and the other end of the recovery wire is led out from the cavity of the bracket body;

the assembly line is an annular metal wire and is threaded around the alloy wire at the tail end of the support body.

Further, the length of the stent body is 4cm, 6cm, 8cm or 10cm, and the diameter of the body part of the stent body is 6mm, 8mm or 10 mm.

Further, the length of the recovery line is 9-15 cm.

Further, the length of the exposed area is 2-8 cm.

Further, the length of the exposed area is 3 mm.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model provides a full tectorial membrane is from formula of expanding biliary tract metal support of can taking a sample, the both ends of support body are spherical, not only have the effect of preventing shifting, and is amazing little to the mucous membrane moreover, and the support both ends can not wrapped up by the mucous membrane.

2. The utility model provides a but full tectorial membrane is from formula of expanding biliary tract metal support of taking a sample, there is the exposed district of waling in the middle of the support body, makes things convenient for the tumour tissue to grow into this internally through exposed district metal mesh, and exposed district is limited, has reduced the incidence that the metal support takes out the in-process tumour and bleed.

3. The utility model provides a full tectorial membrane is from formula of expanding biliary tract metal support of can taking a sample, and recovery line one end is located support body head end, and the other end is drawn forth through support body intracavity, and the line is retrieved in the tractive, and support body head end tightens up and gets into support body intracavity, and support body outer wall and bile duct mucous membrane separation, it take out the resistance little, and metal support takes out the in-process moreover, and its surperficial deep tumour tissue gets into support body inner chamber.

4. The utility model provides a but full tectorial membrane is from formula of expanding biliary tract metal support of taking a sample, only retrieve the line and expose in the duodenum intracavity, can maintain biliary tract seal, reduce the palirrhea cholangitis that leads to such as intestinal juice and chyme palirrhea, the emergence of support jam complication.

5. The utility model provides a but full tectorial membrane is from expanding biliary tract metal support of taking a sample, the assembly line is located the metal support tail end, can assemble to in full tectorial membrane is from expanding metal support release and recoverer.

Based on the above reasons, the utility model can be widely popularized in the technical fields of minimally invasive medical technology, surgical instruments and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural view of a full-coated self-expandable sampling biliary tract metal stent in the embodiment of the present invention.

Fig. 2 is a schematic view of the fully-coated self-expandable sampling biliary tract metal stent in a working state according to the embodiment of the present invention.

Fig. 3 is a schematic view of the fully-coated self-expandable sampling biliary tract metal stent in the working state of being taken out according to the embodiment of the present invention.

In the figure: 1. a stent body; 2. recovering the wire; 3. assembling lines; 4. an exposed area.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the utility model provides a full-film self-expanding sampling biliary tract metal stent, which comprises: astent body 1, arecovery line 2 and anassembly line 3.

Thestent body 1 is formed by weaving nickel-titanium alloy wires and is in a grid shape; the two ends of thebracket body 1 are spherical, and the body part is cylindrical; wherein, the length of thebracket body 1 is 4cm, 6cm, 8cm or 10cm, and the diameter of the body part is 6mm, 8mm or 10 mm.

The inner surface and the outer surface of the two ends of thebracket body 1 are respectively coated with a silica gel film, and the inner part and the outer part of the body part of thebracket body 1 are discontinuously coated with the silica gel films; the body part is provided with a strip-shaped exposedarea 4 with a longitudinal walking shape, so that tumor tissues grow into thestent body 1 through the exposedarea 4; wherein the length of the exposedarea 4 is 2-8cm or 3 mm.

Therecovery wire 2 is an annular metal wire, one end of the recovery wire penetrates through the alloy wire at the head end of thebracket body 1, and the other end of the recovery wire is led out from the cavity of thebracket body 1; wherein the length of therecovery line 2 is 9-15 cm. Therecovery wire 2 is assembled at the head end of the metal bracket and is exposed outside the duodenal papilla through the lumen of the metal bracket, therecovery wire 2 is pulled when the stent is taken out, the tail metal bracket is tightened and reversely folded to enter the lumen of the metal bracket, the metal bracket is gradually separated from the wall of the bile duct and gradually enters the lacuna of the metal bracket, and almost no resistance exists when the stent is taken out.

Theassembly line 3 is an annular metal wire and is threaded around the alloy wire at the tail end of thesupport body 1. The metal stent is assembled into the full-film-covered self-expanding metal stent releasing and recovering device through anassembly line 3.

The utility model discloses an use: the grasping forceps of a grasping forceps type full-film-covering self-expansion metal stent releasing and recovering device (utility model patent No. ZL201820231646.4) are used for biting a metalstent assembly line 3, the grasping forceps are pulled back to tighten the tail part of the metal stent and store the metal stent into an outer sleeve, bile duct intubation is successful, a releaser with a metal stent is placed under the guide of a guide wire, the metal stent is gradually released after a proper position is selected, the head end of the metal stent is slowly bounced off, after the metal stent is completely released, the releaser is withdrawn, and arecovery line 2 is positioned in a duodenum. When the metal support is taken out, therecovery wire 2 is pulled, the head end of thesupport body 1 is tightened and enters the cavity of thesupport body 1, the surface of thesupport body 1 is gradually separated from the mucous membrane of the bile duct, and the tissue at the deep part of the tumor part enters the cavity of thesupport body 1, so that the metal support is taken out and the tissue specimen of the tumor root outside the metal support is obtained.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a full tectorial membrane is from formula of expanding biliary tract metal support that can take a sample which characterized in that includes: the bracket comprises a bracket body (1), a recovery line (2) and an assembly line (3);

the stent body (1) is formed by weaving nickel-titanium alloy wires and is in a grid shape; the two ends of the bracket body (1) are spherical, and the body part is cylindrical;

the inner surface and the outer surface of two ends of the bracket body (1) are respectively coated with a silica gel film, and the inner part and the outer part of the body part of the bracket body (1) are discontinuously coated with the silica gel films; the body part is provided with a strip-shaped exposed area (4) in a longitudinal walking shape, so that tumor tissues grow into the stent body (1) through the exposed area (4);

the recovery wire (2) is an annular metal wire, one end of the recovery wire penetrates through the alloy wire at the head end of the bracket body (1), and the other end of the recovery wire is led out from the cavity of the bracket body (1);

the assembly line (3) is an annular metal wire and is threaded around the alloy wire at the tail end of the support body (1).

2. The full-covered self-expandable biliary stent according to claim 1, wherein the stent body (1) has a length of 4cm, 6cm, 8cm, or 10cm, and a body diameter of 6mm, 8mm, or 10 mm.

3. The full-covered self-expandable biliary stent according to claim 1, wherein the length of the recovery wire (2) is 9-15 cm.

4. The full-covered self-expandable biliary stent according to claim 1, wherein the length of the exposed region (4) is 2-8 cm.

5. The fully-covered self-expandable biliary stent according to claim 1, wherein the length of the exposed region (4) is 3 mm.