CN112741657B - Magnetic traction anastomosis device - Google Patents
Magnetic traction anastomosis device Download PDFInfo
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- CN112741657B CN112741657B CN202011584006.XA CN202011584006A CN112741657B CN 112741657 B CN112741657 B CN 112741657B CN 202011584006 A CN202011584006 A CN 202011584006A CN 112741657 B CN112741657 B CN 112741657B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
Abstract
The invention provides a magnetic traction anastomosis device, which belongs to the technical field of magnetic pressure anastomosis and comprises a sensing module, a magnetic field control module and a traction module; the sensing module is connected with the traction module; when in use, the sensing module and the traction module are jointly placed in a towed target; the magnetic field control module is arranged outside the towed target, receives the pressure information provided by the sensing module, and adjusts the size and the direction of the provided magnetic field in real time, so that the internal towing module is provided with towing force with the size and the direction capable of being regulated in real time, the towed target can pass through media with different densities and resistances, and the towed target can accurately reach a magnetic anastomosis position along a certain path. The invention regulates and controls the magnitude and direction of the magnetic force in real time through the pressure information, solves the positioning problem of the magnetic anastomosis device through pressure sensing positioning, and improves the accuracy of the traction speed and the path in the application of a multi-medium scene.
Description
Technical Field
The invention belongs to the technical field of magnetic pressure anastomosis, and particularly relates to a magnetic traction anastomosis device.
Background
The incidence of anorectal deformity, also called anal atresia, is at the head of congenital digestive tract deformity, the anal atresia is divided into three types of low, medium and high according to the position relation of rectal development cecum and sphincter, the low anal atresia adopts perineal plasty, and the treatment scheme is mature. And the incidence of complications such as middle and high anus occlusion, postoperative fecal incontinence, constipation, rectal mucosa prolapse and the like is high, and the long-term life quality of the children patients after the operation is seriously influenced. The analysis reason mainly has two aspects: firstly, the sick children have poor development of rectum, sphincter and defecation innervation; secondly, the operation damages the fragile and tender tissues. Although the surgical approach is continuously improved and changes from "huge wound" to "minimal wound" are experienced, the current surgery still involves dissection around the anus and damage to the sphincter and nerves that are already dysplastic around the rectum. Therefore, protection of the sphincter and nerves around the rectum, and accurate positioning of the rectum through the center of the sphincter are key to improving the defecation function of the infant after the operation.
In recent years, the magnetic pressure anastomosis technology has been successfully applied in the processes of esophageal closure, intestinal anastomosis and liver transplantation vascular anastomosis, thereby not only reducing the difficulty of the operation and relieving the pain of patients, but also reducing the occurrence of complications. The technology utilizes the action of mutual attraction force between magnets to generate mechanical compression action on tissues between the two magnets, so that the tissues are gradually necrotized, and surrounding tissues are healed in a layered mode. If the magnetic pressure anastomosis technology is adopted for carrying out the intestinal anastomosis, the peripheral dissection operation of the rectum can be avoided, thereby greatly reducing the damage of the peripheral tissues of the rectum.
However, in some patients with high anal atresia, the blind end of the rectum is far away from the anus, and the magnet is required to pull the blind end of the rectum to pass through the body for a certain distance so as to reach the anus for compression anastomosis. However, the perianal anatomy structure is complex, various tissue structures need to be pressed, different tissues have different elasticity, and the required pressing force is different. The existing magnetic anastomosis device is composed of two permanent magnets, the magnetic force is inversely proportional to the distance between the permanent magnets, and the smaller the distance, the larger the pressure, the uncontrollable magnetic force. When the magnetic anastomosis device passes through different tissues, if the magnetic force is too small, the traction force is insufficient, and if the magnetic force is too large, the tissues can be torn, bleeding can occur, and the like. Meanwhile, the blind end of the rectum needs to accurately penetrate through the center of the sphincter and form a rectum anal canal angle so as to ensure the good defecation function of the infant patient. However, the existing magnetic anastomosis device can not realize the regulation and control of the magnetic force direction, so that the problem exists in the aspect of controlling the rectum blind end to accurately pass through the center of the sphincter.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a magnetic traction anastomosis device, aiming at solving the problem that the magnetic force and the direction of the existing magnetic anastomosis device are difficult to regulate and control, so that the positioning accuracy of the magnetic anastomosis device is not high.
In order to achieve the aim, the invention provides a magnetic traction anastomosis device which comprises a sensing module, a magnetic field control module and a traction module;
when in use, the sensing module and the traction module are connected into a whole and are placed in a towed target; the sensing module is in signal connection with the magnetic field control module;
the sensing module is used for feeding back pressure information to the magnetic field control module in real time, and the traction module is used for drawing the drawn target to move under the action of a magnetic field; the magnetic field control module is used for adjusting the size and the direction of a magnetic field according to the pressure information; wherein the pressure information provided by the sensing module is used to identify the location of the towed target.
Preferably, the sensing module comprises a pressure sensor; the pressure sensor is fixed at the top end of the traction module, is always in contact with a target to be dragged in the traction process and is used for feeding back pressure information in real time;
preferably, the traction module comprises a permanent magnet or an electromagnetic coil for interacting with the magnetic field control module to generate the traction force.
Preferably, the magnetic field control module comprises a secondary magnet and a primary magnet; the auxiliary magnets are distributed around the main magnet; the main magnet is used for controlling the magnetic force; the secondary magnet is used to control the magnetic field direction.
The specific principle is as follows: the main magnet adopts a composite structure of a permanent magnet and an electromagnetic coil wrapped outside the permanent magnet, so that the magnetic field of the permanent magnet can be adjusted, when the magnetic force needs to be increased, the direction of the magnetic field generated by the electromagnetic coil is in the same direction as that of the permanent magnet, and the two magnetic fields are superposed to enhance the magnetic field and increase the magnetic force; when the magnetic force needs to be reduced, the direction of the magnetic field generated by the electromagnetic coil is opposite to that of the permanent magnet; the auxiliary magnets adopt hollow coils or coils with iron cores, the auxiliary magnets are distributed around the main magnet, when the direction of the traction module needs to be regulated, the auxiliary magnets in the corresponding direction generate a magnetic field, and the magnetic field is matched with the main magnet to regulate the stress direction of the traction module; by adopting the structure of the main magnet and the auxiliary magnet, the range of magnetic force regulation is enlarged, automatic feedback control can be realized, and the real-time performance and effectiveness of magnetic force regulation are improved.
When the traction anastomosis device is applied to treatment of anorectal deformities, the size of the magnetic field in the body is adjusted by adjusting the main magnet, so that different magnetic forces can be used when different tissue structures are pressed, and the phenomenon of bleeding caused by too-large magnetic force and too-fast pressing is avoided. The direction of the magnetic field can be regulated and controlled by adjusting the auxiliary magnet, so that the magnet in the body can be guided to move in multiple directions, and the requirement of forming a normal rectal-anal canal angle by locking a high-position anus is met.
Preferably, the target to be pulled is the rectal cecum. The sensing module in the magnetic traction anastomosis device can identify the pressure of different tissues so as to accurately determine the center of the sphincter and avoid the injury of the sphincter, so that the magnetic traction anastomosis device disclosed by the invention can be used for treating anorectal deformity under the condition of no tissue damage when the dragged target is the blind end of the rectum.
Preferably, the permanent magnet is wrapped externally with a layer of Polycarbonate (PC) or other biocompatible material. Because most of the permanent magnet is made of metal materials and is easily corroded and oxidized, in practical application, the PC layer is wrapped outside the permanent magnet to avoid the corrosion of the solution to the permanent magnet.
Preferably, the permanent magnet is made of neodymium iron boron, the neodymium iron boron permanent magnet is made of permanent magnet materials with the highest magnetic energy product at present, the highest magnetic field intensity can be generated by the smallest volume, and the higher the magnetic field intensity is, the larger the generated magnetic force is.
Preferably, the magnetic traction anastomosis device further comprises a traction wire, one end of the traction wire is connected with the permanent magnet, and the other end of the traction wire is connected with the tension device.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
the sensing module feeds back pressure information to the magnetic field control module in real time, the magnetic field control module is used for regulating and controlling the size of a magnetic field for the traction module according to the pressure information, reasonably regulating and controlling the size of magnetic force according to the tissue density penetrated by the traction module, controlling the penetrating speed and avoiding tissue tearing or bleeding caused by overlarge traction speed. The position of the towed target can be identified according to the pressure information, and the towed body has different resistance when the towed body passes through various tissues due to different tissue densities, so that the towed body can be judged to pass through which layer of tissue according to the size of the pressure information. When the body to be pulled is close to the sphincter, the sphincter is a closed muscle ring, the muscle resistance is large, the middle resistance of the ring is small, and the body to be pulled can be positioned through the pressure and accurately passes through the center of the sphincter ring, so that the positioning accuracy of the magnetic anastomosis device is improved.
Drawings
FIG. 1 is a schematic structural diagram of a traction and sensing module provided by the present invention;
FIG. 2 is a schematic plane structure diagram of a magnetic field control module provided in the present invention;
FIG. 3 is a schematic perspective view of a magnetic field control module according to the present invention;
fig. 4 is a schematic drawing process provided by an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2, the present invention provides a magnetic traction anastomosis device, including a traction module, a sensing module and a magnetic field control module;
when in use, the traction module and the sensing module are jointly placed in a towed target; the sensing module is in signal connection with the magnetic field control module;
the sensing module is used for feeding back pressure information to the magnetic field control module in real time; the traction module is used for drawing the drawn target to move under the action of the magnetic field; the magnetic field control module is used for providing the size and the direction of a magnetic field for the traction module according to the pressure information; wherein the pressure information provided by the sensing module is used to identify the location of the towed target.
The principle that the magnetic field control module provides the magnitude and the direction of the magnetic field for the traction module is as follows:
the specific principle is as follows: the main magnet adopts a composite structure of a permanent magnet and an electromagnetic coil wrapped outside the permanent magnet, so that the magnetic field of the permanent magnet can be adjusted, when the magnetic force needs to be increased, the direction of the magnetic field generated by the electromagnetic coil is in the same direction as that of the permanent magnet, and the two magnetic fields are superposed to enhance the magnetic field and increase the magnetic force; when the magnetic force needs to be reduced, the direction of the magnetic field generated by the electromagnetic coil is opposite to that of the permanent magnet; the auxiliary magnets are hollow coils or coils with iron cores, the auxiliary magnets are distributed around the main magnet, when the direction of the traction module needs to be adjusted, the auxiliary magnets in the corresponding direction generate a magnetic field, and the magnetic field is matched with the main magnet to adjust the stress direction of the traction module. By adopting the structure of the main magnet and the auxiliary magnet, the range of magnetic force regulation is enlarged, automatic feedback control can be realized, and the real-time performance and effectiveness of magnetic force regulation are improved.
Preferably, as shown in fig. 1, the sensing module comprises a pressure sensor; the pressure sensor is in contact with the towed target and is used for feeding back pressure information in real time; the traction module comprises a permanent magnet and is used for acting with the magnetic field control module to generate traction force.
When the traction anastomosis device is applied to treatment of anorectal deformities, the size of the magnetic field in the body is adjusted by adjusting the main magnet, so that different magnetic forces can be used when different tissue structures are pressed, and the phenomenon of bleeding caused by too-large magnetic force and too-fast pressing is avoided. The direction of the magnetic field can be regulated and controlled by adjusting the auxiliary magnet, so that the magnet in the body can be guided to move in multiple directions, and the requirement of normal rectal-anal canal angle is met.
Preferably, as shown in fig. 2, the magnetic field control module comprises a secondary magnet (No. 2,3,4,5,6,7) and a primary magnet (No. 1); the auxiliary magnets are distributed around the main magnet; the main magnet is used for controlling the magnetic force; the secondary magnet is used to control the magnetic field direction.
Preferably, the permanent magnet is wrapped with a PC layer. Because most of the permanent magnet is made of metal materials and is easily corroded and oxidized, in practical application, the PC layer is wrapped outside the permanent magnet to avoid the corrosion of the solution to the permanent magnet.
Preferably, the permanent magnet is neodymium iron boron material with the highest magnetic energy product.
Preferably, the target to be pulled is the rectal cecum. The sensing module in the magnetic traction anastomosis device can identify the pressure of different tissues so as to accurately determine the center of the sphincter and avoid the injury of the sphincter, so that the magnetic traction anastomosis device disclosed by the invention can be used for treating anorectal deformity under the condition of no tissue damage when the dragged target is the blind end of the rectum.
Preferably, the magnetic traction anastomosis device further comprises a traction wire, one end of the traction wire is connected with the permanent magnet, and the other end of the traction wire is connected with the tension device.
Examples
The magnetic traction anastomosis device provided by the invention can be applied to treatment of anorectal deformity, the position relationship between the magnetic field control module and an anus locking object is shown in figure 3, the position relationship between the traction module, the sensing module and the magnetic field control module and the anus is shown in figure 4, and the magnetic traction anastomosis device is specifically applied as follows:
during the treatment process, firstly, colon double-cavity fistulization is carried out on an anus blocking object, the sensing module is placed at the blind end of the rectum through a far-end fistula under the auxiliary observation of an enteroscope, and a coil array of the magnetic field control module generates a magnetic field with controllable size and direction to attract the traction module; the sensing module feeds back a pressure signal to a coil array of the magnetic field control module, and the magnetic field intensity of the coil array is continuously adjusted according to the feedback pressure, so that the traction force is kept to be proper; under the pulling of the traction force, the blind end of the rectum is gradually extended to the far end, when the blind end of the rectum reaches the vicinity of the sphincter, the lowest point of resistance is searched according to the pressure fed back by the positioning unit, because the resistance of the center of the sphincter is smaller than the periphery of the sphincter, the center of a sphincter ring is determined by searching the lowest point of resistance, the magnetic field direction of a coil array of the magnetic field control module is adjusted to be just opposite to the center of the sphincter ring, and the blind end of the rectum can accurately pass through the center of the sphincter ring by keeping the magnetic force direction unchanged; after the blind end of the rectum passes through the sphincter, the residual fat and the skin tissue are pressed by the fixed magnetic force, and the anastomosis is completed.
As shown in fig. 4, in some specific cases, the traction can be assisted by threading one end of the thread to the end of the permanent magnet in vivo, and then the thread can be passed through the blind end of rectum, the center of sphincter and the sunken position of anus to reach the outside of body, and the other end of the thread is connected with a tension device to provide a certain amount of tension, and an auxiliary electromagnetic coil provides a guiding force.
In conclusion, the sensing module provided by the invention feeds back pressure information to the magnetic field control module in real time, and pulls the pulled target to move under the action of the magnetic field; the magnetic field control module is used for providing the size and the direction of a magnetic field for the traction module according to the pressure information; the pressure information may also be used to identify the location of the towed target. The size and the direction of the magnetic force can be regulated and controlled in real time through the pressure information, the position of the pulled target can be identified by combining the pressure information, and the positioning accuracy of the magnetic traction anastomosis device is improved.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A magnetic traction anastomosis device is characterized in that the magnetic traction anastomosis device is used for treating anus occlusion and comprises a sensing module, a magnetic field control module and a traction module;
when in use, the sensing module and the traction module are jointly placed in a towed target; the sensing module is in signal connection with the magnetic field control module;
the sensing module is used for feeding back pressure information to the magnetic field control module in real time; the traction module is used for drawing the drawn target to move under the action of the magnetic field; the magnetic field control module is used for providing the size and the direction of a magnetic field for the traction module according to the pressure information; the pressure information provided by the sensing module is used for identifying the position of the towed target;
the sensing module comprises a pressure sensor; the pressure sensor is fixed at the top end of the traction module, is always in contact with a target to be dragged in the traction process, and is used for feeding back pressure information in real time.
2. The magnetic traction anastomosis device according to claim 1, wherein said traction module is a permanent magnet or an electromagnetic coil for interacting with the magnetic field control module to generate traction force.
3. The magnetic traction anastomosis device according to claim 1 or 2, wherein said magnetic field control module comprises a secondary magnet and a primary magnet; the auxiliary magnets are distributed around the main magnet; the main magnet is used for controlling the magnetic force; the secondary magnet is used to control the magnetic field direction.
4. The magnetic distraction anastomosis device of claim 3, wherein said primary and secondary magnets are permanent magnets or electromagnetic coils, and wherein the electromagnetic coils are air coils or cored coils.
5. The magnetic traction anastomosis device according to claim 2, wherein said permanent magnets are externally wrapped with a polycarbonate layer.
6. The magnetic distraction anastomosis device of claim 1, wherein said target being distracted is the rectal cul de sac.
7. A magnetic traction anastomosis device according to claim 1 or claim 5, further comprising a traction wire having one end connected to the permanent magnet and the other end connected to the tensioning device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011584006.XA CN112741657B (en) | 2020-12-28 | 2020-12-28 | Magnetic traction anastomosis device |
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| CN202011584006.XA CN112741657B (en) | 2020-12-28 | 2020-12-28 | Magnetic traction anastomosis device |
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| CN112741657B true CN112741657B (en) | 2021-10-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103815985A (en) * | 2014-01-28 | 2014-05-28 | 西安交通大学 | Recanalization anastomosis apparatus for anal atresia |
| CN203988193U (en) * | 2014-07-07 | 2014-12-10 | 西北妇女儿童医院 | A kind of magnetic devices that is applicable to intestinal canal anastomosis |
| CN110575118A (en) * | 2019-09-11 | 2019-12-17 | 安翰科技(武汉)股份有限公司 | capsule endoscope control method, system, electronic device and readable storage medium |
| CN210354808U (en) * | 2019-03-21 | 2020-04-21 | 西安交通大学第一附属医院 | Device for congenital anal closure anastomosis |
| CN210433517U (en) * | 2019-03-21 | 2020-05-01 | 西安交通大学第一附属医院 | Magnetic equipment for congenital digestive tract locking anastomosis |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8043290B2 (en) * | 2004-09-29 | 2011-10-25 | The Regents Of The University Of California, San Francisco | Apparatus and methods for magnetic alteration of deformities |
| EP2632346A4 (en) * | 2010-01-05 | 2015-05-27 | Beacon Endoscopic Corp | Methods and apparatus for magnet-induced compression anastomosis between adjacent organs |
-
2020
- 2020-12-28 CN CN202011584006.XA patent/CN112741657B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103815985A (en) * | 2014-01-28 | 2014-05-28 | 西安交通大学 | Recanalization anastomosis apparatus for anal atresia |
| CN203988193U (en) * | 2014-07-07 | 2014-12-10 | 西北妇女儿童医院 | A kind of magnetic devices that is applicable to intestinal canal anastomosis |
| CN210354808U (en) * | 2019-03-21 | 2020-04-21 | 西安交通大学第一附属医院 | Device for congenital anal closure anastomosis |
| CN210433517U (en) * | 2019-03-21 | 2020-05-01 | 西安交通大学第一附属医院 | Magnetic equipment for congenital digestive tract locking anastomosis |
| CN110575118A (en) * | 2019-09-11 | 2019-12-17 | 安翰科技(武汉)股份有限公司 | capsule endoscope control method, system, electronic device and readable storage medium |
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