CN214907517U

CN214907517U - Radial magnetizing anastomat for non-invasive digestive tract reconstruction

Info

Publication number: CN214907517U
Application number: CN202120945325.2U
Authority: CN
Inventors: 吕毅; 单丽宇; 陈环; 李宇
Original assignee: First Affiliated Hospital of Medical College of Xian Jiaotong University
Current assignee: First Affiliated Hospital of Medical College of Xian Jiaotong University
Priority date: 2021-05-06
Filing date: 2021-05-06
Publication date: 2021-11-30
Anticipated expiration: 2031-05-06

Abstract

A radial magnetizing anastomat for non-invasive digestive tract reconstruction comprises an anastomosis part and an auxiliary part, wherein the anastomosis part consists of two groups of anastomosis magnets, each group of anastomosis magnets consists of at least 3 radial magnetizing cylindrical magnets, the auxiliary part comprises a J-shaped pipe and a guide wire, the guide wire is used for guiding the J-shaped pipe into a position to be anastomosed, the J-shaped pipe consists of a tubular part and a curved part, each magnet is fed into the tubular part, the axial direction of each magnet is always vertical to the axial direction of the tubular part, the curved part is connected to the tail end of the tubular part and is bent inwards, and the magnets guiding out of the tubular part are attracted in the lateral direction and connected end to form a ring shape.

Description

Radial magnetizing anastomat for non-invasive digestive tract reconstruction

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a radial magnetizing anastomat for noninvasive digestive tract reconstruction.

Background

Gastric outflow obstruction is a common complication of many advanced tumors, such as pancreatic head cancer, duodenal cancer, gallbladder cancer, gastric cancer, etc. In order to solve the problem of food intake of patients with gastric outflow obstruction, a metal bracket is mainly placed in a narrow part under an endoscope in clinic, and the traditional Chinese medicine preparation is simple to operate, has small wound, is low in complication incidence rate and is exact in curative effect. However, the bare metal stent is mostly adopted in clinic, the stent is required to be repeatedly placed due to the fact that the tissue grows into the stent, and more pain is brought to a patient especially when the malignant growth is caused by the narrow cause. Ultrasound-guided gastrointestinal anastomosis also develops gradually based on the adjacent anatomical structures between the posterior wall of the stomach and the beginning of the jejunum, but with high technical requirements on the operator.

Magnetic Surgery (MS) is a new comprehensive technical subject that utilizes specially designed magnetic medical instruments or devices to convert the "non-contact" magnetic field force between magnetic substances into a force capable of performing specific functions in clinical diagnosis and treatment, thereby completing the functions of tissue compression anastomosis, organ anchoring, lumen navigation, gap expansion, controllable tracing, and the like. Magnetic anastomosis, an important branch of magnetic compression, refers to a comprehensive technique for restoring lumen continuity by means of "non-contact" magnetic force between magnets, either open abdomen (thoracotomy), endoscopic procedures, or interventional techniques. At present, the magnetic anastomosis technology is widely applied to lumen anastomosis and lumen occlusion/stenosis recanalization, a series of novel surgical technologies are created, the traditional lumen anastomosis and lumen occlusion/stenosis recanalization modes are changed, and the magnetic anastomosis technology is successfully applied to the digestive tract lumen anastomosis, the digestive tract occlusion/stenosis recanalization and the blood vessel anastomosis and shows good application effects.

However, since most of the magnetic anastomosis anastomats are circular rings and have large volumes, the gastrointestinal palliative magnetic anastomosis is performed under an endoscope, and a few cases are reported internationally. Machytka et al have designed a self-assembled magnetic stapler that can be switched between linear and circular by arranging several trapezoidal magnets with the magnets arranged first and second, but the maintenance of the circular structure is mainly based on the optimization of the mechanical structure, which increases the complexity of the stapler and has the possibility of mechanical failure.

Disclosure of Invention

In order to overcome the drawbacks of the prior art described above, it is an object of the present invention to provide a radially magnetized stapler for non-invasive reconstruction of the digestive tract, which is easy to be minimally invasive and does not cause stenosis of the anastomotic orifice.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a radial anastomat that magnetizes for having no wound alimentary canal rebuild, includes anastomosis portion and auxiliary part, wherein, anastomosis portion comprises two sets of anastomosis magnets, and every group anastomosis magnet comprises at least 3 radial cylindrical magnet 1 that magnetizes, auxiliary part includes J type pipe and seal wire, the seal wire is used for introducing the J type pipe and treats the department of anastomosing, the J type pipe comprises tubulose portion 3 and curved portion 2, wherein each magnet 1 of tubulose portion 3 confession is sent into, and the axial of magnet 1 is perpendicular all the time with the axial of tubulose portion 3, curved portion 2 is connected in the tail end of tubulose portion 3, and incurving leads each magnet 1 of tubulose portion 3 to inhale mutually in the side direction and end to end form cyclic annular.

The diameter and the height of the bottom surface of the magnet 1 are equal.

The diameter and the height of the bottom surface of the magnet 1 are both 2 mm.

The radial magnetization of the magnet 1 means that the magnetic poles of the magnet are radial, that is, an S pole and an N pole exist on the cross section of the magnet 1 at the same time.

The section of the tubular part 3 is circular or rectangular, and the pipe diameter of the tubular part is equal to or slightly larger than the size of the magnet 1, so that the magnet 1 can smoothly pass through the tubular part without deviation.

The curved portion 2 is made of a flexible material having flexibility, and one end thereof is connected to one side of the tail end of the tubular portion 3 and the other end thereof extends in a curved shape.

The curved part 2 is a curved plate, and a groove track for the magnet 1 to run is arranged on the inner side of the plate surface.

Compared with the prior art, the invention has the beneficial effects that:

a. there are two stable states of 'linear' (embedded state) and 'annular' (inosculated state), and the two stable states can be changed from linear to annular after being embedded;

b. anastomotic stoma with different sizes can be formed, and the method is suitable for different clinical scenes;

c. adjusting the magnet parameters for different application scenarios can provide the proper mating force.

Drawings

Fig. 1 is a schematic view (top view, line shape) of the structure of the anastomosis magnet.

Fig. 2 is a schematic view of the structure of the anastomosis magnet (front view, linear).

Fig. 3 is a schematic view (top view, annular) of the structure of the anastomosis magnet.

Fig. 4 is a schematic view of a single radially magnetized magnet.

FIG. 5 is a schematic view of a J-tube structure (front view).

Fig. 6 is a schematic view (bottom view) of the J-tube structure.

FIG. 7 is a drawing illustrating a first stapler implantation procedure.

FIG. 8 is a second drawing illustrating the stapler implantation process.

FIG. 9 is a third drawing of the stapler implantation process.

FIG. 10 is a fourth illustration of the stapler implantation process.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the drawings and examples.

The invention relates to a radial magnetizing anastomat for noninvasive digestive tract reconstruction, which comprises an anastomosis part and an auxiliary part.

Wherein the anastomosis portion is comprised of two groups of anastomosis magnets, each group consisting of at least 3 magnets 1, and in the embodiment of the invention illustrated in figures 1, 2 and 3, each group consisting of 6 magnets 1.

Referring to fig. 4, the magnet 1 of the present invention has a cylindrical shape, and is magnetized in a radial direction so that magnetic poles thereof are in a radial direction, that is, the magnet 1 has both S-pole and N-pole in a cross section thereof, the magnet 1 magnetized in the radial direction can attract each other in a side surface thereof, and the magnets 1 are connected only by magnetic force and can form a ring shape when they are connected end to end, thereby having two stable states of "linear" (embedded state) and "ring" (fitted state). And because the top surface and the cross section of the magnet 1 both have S poles and N poles, the first group of annular anastomosis magnets and the second group of annular anastomosis magnets are ensured to be attracted in one-to-one correspondence in the axial direction, thereby realizing anastomosis.

For convenience of operation, the diameter and height of the bottom surface of the magnet 1 are equal, and in this embodiment, are all 2 mm.

The auxiliary part comprises a J-shaped pipe and a guide wire, the guide wire is an existing device and is used for guiding the J-shaped pipe into a position to be anastomosed, referring to fig. 5 and 6, the J-shaped pipe consists of a tubular part 3 and a curved part 2, the cross section of the tubular part 3 is circular or rectangular and is used for feeding each magnet 1 in an embedded state, the pipe diameter of the tubular part 3 is equal to or slightly larger than the size of the magnet 1 so as to ensure that the magnet 1 can smoothly pass through without deviation, and in the whole process, the axial direction of the magnet 1 is always perpendicular to the axial direction of the tubular part 3. The curved portion 2 is made of a flexible material having a certain flexibility, one end of which is connected to one side of the tail end of the tubular portion 3, and the other end of which extends and is bent inward to guide the magnets 1 in the tubular portion 3 to attract each other in a lateral direction and form a ring shape by joining them end to end. In this embodiment, the curved portion 2 may be a curved plate, and the inner side of the plate surface may be provided with a groove track for the magnet 1 to run.

The process of inserting the anastomosis magnet is illustrated in figures 7 to 10, which represent different states of the insertion process. Specifically, an endoscope is advanced to a narrow part, a guide wire is introduced through the endoscope, the guide wire passes through the narrow part (such as a space occupied by pancreatic cancer), the endoscope is withdrawn, then a J-shaped tube is introduced through the guide wire, and the J-shaped tube is positioned at the position to be anastomosed (such as the starting position of jejunum) under fluoroscopy. Withdrawing the guide wire, placing the linear anastomosis magnet into the J-shaped tube, moving the anastomosis magnet to the end of the tubular part 3 gradually under the action of the guide wire, and bending the linear anastomosis magnet to form a ring under the action of the curved part 2. Another anastomosis magnet is placed in the proximal stricture end (e.g., in the stomach) and looped in the same manner. The two annular anastomosis magnets are mutually attracted and coupled, the tissues between the two annular anastomosis magnets are subjected to ischemic necrosis and fall off, and the surrounding tissues are healed layer by layer to finally form an anastomosis.

Claims

1. The utility model provides a radial anastomat that magnetizes for having no wound alimentary canal rebuild, its characterized in that includes anastomosis portion and auxiliary portion, wherein, anastomosis portion comprises two sets of anastomosis magnets, and every group anastomosis magnet comprises at least 3 radial cylindrical magnet (1) that magnetize, auxiliary portion includes J type pipe and guide wire, the guide wire is used for introducing the J type pipe and treats the anastomosis department, the J type pipe comprises tubular portion (3) and curved portion (2), wherein tubular portion (3) supply each magnet (1) to send into, and the axial of magnet (1) is all the time perpendicular with the axial of tubular portion (3), curved portion (2) are connected in the tail end of tubular portion (3), and incurve, and each magnet (1) of leading out tubular portion (3) attracts each other in the side direction and end to end forms the ring-shape.

2. The radial magnetizing stapler for non-invasive alimentary canal reconstruction according to claim 1, characterized in that the bottom surface of said magnet (1) is equal in diameter and height.

3. The radial magnetizing anastomat for noninvasive gastrointestinal reconstruction of claim 1, wherein the diameter and the height of the bottom surface of the magnet (1) are both 2 mm.

4. The radial magnetizing stapler for non-invasive alimentary canal reconstruction according to claim 1, characterized in that the radial magnetizing of said magnet (1) means that its poles are radial, i.e. there are both S and N poles on the cross section of the magnet (1).

5. The radial magnetizing anastomat for noninvasive gastrointestinal reconstruction according to claim 1, wherein the cross section of the tubular part (3) is circular or rectangular, and the pipe diameter is equal to or slightly larger than the size of the magnet (1) so that the magnet (1) can pass through smoothly without deviation.

6. The radial magnetizing stapler for non-invasive alimentary canal reconstruction according to claim 1, characterized in that said curved portion (2) is made of flexible material with toughness, one end of which is connected to one side of the tail end of the tubular portion (3) and the other end of which extends in a curve.

7. The radial magnetizing anastomat for noninvasive tract reconstruction according to claim 1 or 6 is characterized in that the curved part (2) is a curved plate, and the inner side of the plate surface is provided with a groove track for the magnet (1) to run.