CN108056796A - Disposable self-pressurized type bowel anastomosis device - Google Patents

Abstract

The invention discloses a disposable self-pressurizing intestinal stapler, which includes two matching pressurizing mechanisms made of degradable polymer materials and a positioning locking mechanism made of memory alloy; the positioning locking mechanism includes A plurality of memory alloy locking plug-ins, each memory alloy locking plug-in is provided with plugs at both ends, corresponding to the two pressurizing mechanisms, and the two pressurizing mechanisms are connected and matched by multiple memory alloy locking plug-ins as connectors Together. After the present invention is installed on the patient, relying on the phase transition temperature characteristics of the memory alloy, it will continue to return to its original state at body temperature, thereby generating continuous contraction force, and effectively and reliably continuously pressurizing the anastomosis site. It solves the end-to-end anastomosis of the colon, which can ensure repeated opening and closing without affecting the anastomotic force. It is effective, safe, and reduces various complications. Excreted from the body, no residue in the body.

Description

Disposable self-pressurizing intestinal stapler

technical field

The invention relates to the technical field of medical devices, in particular to a disposable self-pressurizing intestinal stapler.

Background technique

Intestinal anastomosis is one of the most common operations in abdominal surgery, and it is also the most basic operation that general surgeons must master. Surgeons have used surgical instruments to stitch tissue together for nearly 200 years. As one of the most successful surgical instruments, staplers have been widely used in modern surgery. All manual sutures in gastrointestinal surgery can be performed by staplers. Gastrointestinal staplers are considered to be the most important surgical instruments in the second half of the 20th century. The most important advances in the field of devices. More and more surgeons are willing to use staplers when performing esophagoenterostomy, anus preservation for low rectal cancer, and laparoscopic surgery.

At present, intestinal anastomosis has undergone various operation methods such as manual suturing, metal staple suturing, and "seamless technology". Tract surgery is playing an increasingly important role in reconstructing the digestive tract, making many difficult and complicated operations easier and simpler. Proper use and mastery of intestinal stapler technology can not only improve the efficiency and quality of surgical operations, but also help surgeons complete difficult digestive tract reconstruction operations more conveniently, accurately and with high quality. It can not only overcome the obstacle of poor visual field exposure in some parts, but also avoid the occurrence of complications such as anastomotic stenosis due to the standardization of anastomotic stoma. The application of stapler technology can reduce the trauma in the operation, thereby reducing the recovery time of patients and reducing expenses.

Although the use of staplers in digestive tract reconstruction surgery can shorten the operation time and reduce the incidence of anastomotic leakage, anastomotic bleeding, stricture and other complications, if the stapler is used improperly or the technical details of the use of the stapler are not paid attention to, it may still cause serious complications. A certain percentage of complications occurred. Many staplers cannot control the occurrence of postoperative complications well, such as the stapled intestinal stapler, which is likely to cause residual metal nails on the intestinal wall in the body, and is prone to infection; BAR disposable mechanical buckle intestinal stapler , due to the structural characteristics, it cannot be conveniently and quickly applied to the anastomosis of the lower rectum. If there is a safety hazard after the anastomosis, but at this time the BAR cannot be opened again, remedial measures must be taken, and additional surgical steps and difficulty. In addition, as modern surgery enters the era of minimally invasive surgery, people have put forward higher requirements for intestinal anastomosis.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention proposes a disposable self-pressurizing intestinal stapler with convenient operation, low operation risk, good therapeutic effect and more economical.

The present invention is realized by adopting the following technical scheme: a disposable self-pressurizing intestinal stapler, including two matching pressurizing mechanisms made of degradable polymer materials and a positioning locking mechanism made of memory alloy; The positioning locking mechanism includes a plurality of memory alloy locking inserts, and each memory alloy locking insert is provided with plugs at both ends, which are correspondingly plugged into the two pressurizing mechanisms. The press mechanism is connected and anastomosed together.

As the first structure of the present invention, the anastomotic pressurization mechanism is two anastomotic pressurization flaps, the pressurization flaps are umbrella-shaped, and a circular shaft hole is opened in the middle of the umbrella shape, surrounding the two anastomotic pressurization flaps. The umbrella-shaped surface of the petal is uniformly provided with paired sockets corresponding to each other; the plugs at both ends of each memory alloy locking insert are correspondingly plugged into a pair of sockets.

The plug is equipped with a polymer material hot melt block, and the upper part of the socket hole opened on the pressurizing valve is expanded to form a protruding strip socket. One piece.

As a further improved second structure of the present invention, the matching pressurizing mechanism is composed of two annular pressurizing plates with shaft holes in the center and two matching pressurizing petals; the top surface of the pressurizing petals is annular Retaining ring, the periphery of the retaining ring extends downwards to form a tubular anastomotic end, the inner wall of the anastomotic end is provided with an internal thread, and the circumference of the annular pressure plate is provided with an external thread matching the internal thread, and the outer threads of the two annular pressure plates are There are at least four pairs of corresponding sockets evenly distributed on the threaded surface, which are used to accommodate the plugs at both ends of the memory alloy locking insert. The plugs at both ends of each memory alloy locking insert are respectively embedded in the corresponding pair of sockets. The pressurizing plate and the two pressurizing flaps are correspondingly threaded to lock the memory alloy locking plug-in.

As a further improvement of the third structure of the present invention, the two annular pressure plates are annular pressure plates with enlarged central axis holes, and the sockets for accommodating the plugs at both ends of the memory alloy locking insert Correspondingly, they are evenly distributed on the annular plate surface of the two annular pressure plates near the periphery of the circumference. The plugs at both ends of each memory alloy locking insert are respectively inserted into the corresponding pair of sockets. The corresponding threaded connection of the petal is locked to the memory alloy locking plug-in.

The portion near the socket in the axial hole in the middle of the annular pressure plate with the enlarged central axis hole protrudes inward to form a reinforcing rib.

The fourth structure of the present invention is a preferred solution. The matching pressurization mechanism is composed of male and female locking rings and two matching pressurization flaps; The two retaining rings are provided with at least four pairs of opposite sockets, which are used to accommodate the plugs at both ends of the memory alloy locking plug-in. The top of the anastomotic pressure valve tube is provided with an internal thread 21, which is compatible with The outer thread 32 threads that are provided with on the periphery of the lock ring are connected to lock and fix the memory alloy locking plug-in plug.

The second and fourth structures of the present invention also include independent passages formed by the sleeve, and all the memory alloy locking inserts are distributed outside the circumferential surface of the sleeve after connecting with the two matched pressure flaps; In the fourth structure of the present invention, the sleeve is installed in the shaft hole of the male lock ring, and the other end of the sleeve penetrates into the shaft hole of the female lock ring to form an independent channel; in the second structure of the present invention, the two rings The upper part of the pressurizing plate has a tapered slope with a smaller aperture, and the installation sleeve in the shaft hole in the middle of one of the annular pressurizing plates connects with the bottom end of the conical inclined surface of the other annular pressure plate to form an independent channel.

The middle part of the above-mentioned memory alloy locking insert of the present invention is an open memory alloy deformation ring, and the two ends of the open ring extend outward to form gripping arms. The plugs are respectively arranged at the ends of the two gripping arms. The plugs are adapted to the sockets and are T-shaped cards. Buckle or double T-shaped buckle in series.

The anastomotic sides of the above-mentioned two matched pressure flaps are set as straight sides or wavy sides that match each other.

The beneficial effect of the present invention is that: the present invention is a disposable self-pressurizing intestinal stapler, through the plugs at both ends of a plurality of memory alloy locking inserts and the two pressurizing mechanisms correspondingly inserted, after the two pressurizing mechanisms are connected fit together. During the operation, the disposable self-pressurizing intestinal stapler (product) is opened by tools, that is, the memory alloy anastomotic clip is opened, and the product of the present invention is opened. Temperature characteristics, it is in the state of returning to its original state continuously at body temperature, thereby generating continuous contraction force, and effectively and reliably continuously pressurizing the anastomosis site, which is safe and reliable. The invention solves the end-to-end anastomosis of the colon, can ensure repeated opening and closing without affecting the anastomotic force, effectively and safely minimizes the occurrence of various complications, and at the same time solves the problem of intraoperative operation of the existing intestinal anastomat The difficult problem is that the stapler can be completely discharged from the body after the intestinal tract is healed, without any residue in the body.

Description of drawings

Fig. 1. The first structure schematic diagram of the disposable self-pressurizing intestinal stapler of the present invention;

Figure 2. The assembled schematic diagram of Figure 1;

Figure 3. Part I enlarged schematic diagram in Figure 2;

Fig. 4. Exploded view of the second structure of the disposable self-pressurizing intestinal stapler of the present invention;

Fig. 5. The cross-sectional view of Fig. 4 after assembly;

Figure 6. The assembled side view of Figure 4 and the top view corresponding to the side view;

Figure 7. An exploded view of the third structure of the disposable self-pressurizing intestinal stapler of the present invention;

Fig. 8. The cross-sectional view of Fig. 7 after assembly;

Figure 9. The assembled side view of Figure 7 and the top view corresponding to the side view;

Fig. 10. Exploded view of the fourth structure of the disposable self-pressurizing intestinal stapler of the present invention;

Fig. 11. The cross-sectional view of Fig. 10 after assembly;

Figure 12. The assembled side view of Figure 10 and the top view corresponding to the side view;

Figure 13. Schematic diagram of the memory alloy anastomotic clip with a T-shaped buckle as the plug;

Figure 14. Schematic diagram of the structure of memory alloy anastomotic clips with double T-shaped buckles connected in series;

Figure 15. Schematic diagram of the memory alloy anastomotic clip structure of the fan-shaped plug.

In the figure: 1. Memory alloy locking insert, 11. Pressure ring, 12. Grab arm, 13. Plug, 2. Ring pressure plate: 21. Socket, 211. Boss strip socket, 22. External thread, 23. Internal thread in the beveled surface, 24. Beveled surface, 25. Ring groove, 26. Sleeve, 27. Slot, 28. Rib; 33. Internal thread; 4. Lock ring: 41. Male lock ring, 42. Female lock ring, 43. Top groove, 44. External thread, 45. Shaft hole.

Detailed ways

Disposable self-pressurizing intestinal stapler, including two matching pressurization mechanisms made of degradable polymer materials and a positioning locking mechanism made of memory alloy; the positioning locking mechanism includes a plurality of memory alloy Locking inserts, each memory alloy locking insert is provided with plugs at both ends, corresponding to the two matching pressurization mechanisms, and the two matching pressurizing mechanisms are connected by multiple memory alloy locking inserts as connectors together.

As shown in Figures 13 and 14, the positioning locking mechanism made of memory alloy is memory alloy anastomotic clip, which is processed by memory alloy. The middle part is an open pressure ring 11 (open memory alloy deformation ring), and the two ends of the open ring face The gripping arms 12 are formed by extending outward, and the plugs 13 are respectively located at the ends of the two gripping arms 12. The plugs 13 are T-shaped buckles or double T-shaped buckles in series that are adapted to the socket.

Example 1

The first structure of the disposable self-pressurized intestinal stapler of the present invention, as shown in Figure 1, the anastomotic press mechanism in the disposable self-pressurized intestinal stapler is two matching pressurized flaps 3 , the pressure valve is umbrella-shaped, with a circular shaft hole in the middle of the umbrella, and there are evenly provided paired sockets corresponding to each other on the umbrella-shaped surface of the two matching pressure valves; each of the memory alloy locks The plugs at both ends of the plug-in are correspondingly plugged into a pair of sockets. The anastomotic pressure valve 3 is injection molded with medical polymer materials such as PP, PE, Teflon, etc. or degradable polymer materials such as PGA, PGLA, PPDO, etc. The triangular shaft holes are symmetrically opened on the pressurized valve for the sake of aesthetics and to reduce certain material loss, which is more economical. When using degradable polymer materials, this shaft hole is also a weak point, which can effectively control the disintegration of the stapler and facilitate excretion from the body. The edge of the anastomotic side 31 is a wavy toothed side, and there are 8-18 wavy bumps on the toothed side. After locking, the memory alloy anastomotic clip provides safe and effective axial pressure. The wavy tooth 31 anastomosis can Better provide fixation and pressure on the lateral side to form anastomotic seams with three specifications of 1.5mm, 2.0mm, and 2.5mm. The cross-section of the anastomotic pressure flap is circular, with a diameter of 20-34mm. The protruding strip socket 211 provided on the anastomotic pressure flap is docked with the plugs 13 at both ends of the memory alloy anastomotic clip, and the T-shaped buckles at both ends of the memory alloy anastomotic clip are injection-molded with a part of medical polymer material to form a fan-shaped plug. , the shape is shown in Figure 15, it is used to dock with the socket of the anastomotic pressure flap in Figure 3, and the plug 13 and the socket 21 are thermally fused and merged through the hot-melt process, and finally the protruding part of the plug 13 is completely melted into the protruding part of the socket In the platform groove and the gap, it becomes an integral body, so as to achieve the purpose of integrated fixed molding, thereby forming an anastomosis.

Compared with some intestinal staplers currently on the market, this disposable self-pressurizing intestinal stapler can specifically adapt to the end-to-end anastomosis of the colon (except the sigmoid colon) under the premise of ensuring its good effect, and It is suitable for laparoscopic surgery, minimally invasive surgery and open surgery. The disposable self-pressurizing intestinal stapler is placed on the anastomosis through tools. The pressure of the disposable self-pressurizing intestinal stapler comes from the memory alloy Self-resetting, and the memory alloy anastomotic clip becomes soft after ice application, and the locking ring of the stapler is deformed from the prototype to a straight line under the action of external force, so that the stapler can be opened. In the last step of the operation, the memory alloy of the stapler is heated and automatically returns to its original state. Shape and restore its strength, thereby exerting continuous effective and safe pressure, which directly reduces the operation steps, can maintain and continuously apply effective pressure under normal human body temperature, and is micro-variable elastic pressure rather than fixed-value mechanical pressure. The three specifications of 1.5mm, 2mm, and 2.5mm effectively reduce the needless mechanical pressure caused by slightly larger or smaller fixed mechanical pressure due to problems such as model selection and patient intestinal wall thickness when using a mechanical pressure intestinal stapler. There is no possibility of bleeding or intestinal leakage, and the doctor does not need to use various methods to pressurize and fix the stapler at the end, reducing the operation steps.

Compared with some mechanical one-time anastomotic methods, the memory alloy anastomotic clip of the present invention can be opened multiple times, and can still ensure continuous and safe pressure after multiple closures, reducing the chance of finding the intestinal end after pressurization and fixation due to doctor's mistakes. There are safety hazards in the anastomosis and the possibility of anastomosis failure; compared with the intraoperative operation of some stapled intestinal staplers, the disposable self-pressurized intestinal stapler does not need to open more holes in the intestine during the operation, It simplifies the steps of re-suturing after operation, reduces operation time and risk, reduces pain of patients and is more economical. It is also suitable for minimally invasive surgery.

A plurality of triangular shaft holes are opened on the anastomotic pressure flap 3 . Not only is it beautiful, it also reduces the consumption of degradable polymer materials, and if a degradable polymer material is selected, it can also facilitate subsequent disintegration. The final products after disintegration are carbon dioxide and water, which are non-toxic and harmless to the body. The disposable self-pressurizing intestinal stapler will eventually disintegrate into small pieces and be completely excreted from the body without any residue in the body. Therefore, some stapled intestinal staplers are directly eliminated. After healing, the intestinal wall will still be There are nail residues that cause local infection, redness and swelling. Using non-degradable polymer materials, the structure can also be excreted from the body as a whole.

Example 2

The second structure of the disposable self-pressurized intestinal stapler of the present invention, as shown in Figure 4, selects the plug 13 as a memory alloy anastomotic clip with a T-shaped buckle adapted to the socket, except for the memory alloy anastomotic clip, The rest of the parts are made of medical polymer materials such as PP, PE, PTFE, polysulfone, etc. or degradable polymer materials such as: PGA, PGLA, PPDO, etc. plus part of barium sulfate (as a developer). As shown in Figure 4, the said matching pressing mechanism is made up of two annular pressing plates 2 and two matching pressing flaps 3; the middle part of the two annular pressing plates 2 has a shaft hole as a central channel; the pressing An annular retaining ring 32 on the top surface of the petal, the periphery of the retaining ring 32 extends downwards to form a tubular anastomotic end, the inner wall of the anastomotic end is provided with an internal thread 33, and the circumference of the annular pressure plate 2 is provided with a matching internal thread 33 External threads 22, at least four pairs of corresponding sockets 21 are evenly distributed on the external thread surfaces of the two annular pressure plates, for accommodating the plugs 13 at both ends of the memory alloy locking plug-in, and the two ends of each memory alloy locking plug-in The plugs are respectively inserted into the corresponding pair of sockets 21 and fastened with them, and the two annular pressure plates 2 and the two pressure petals 3 are correspondingly threaded to lock the memory alloy anastomotic clip.

Compared with structure 1, the memory alloy anastomotic clip in this type is not connected with the pressure valve but is fastened with the annular pressure plate. There are 4 sockets 21 on the external thread surface of the ring pressure plate, which are connected with the memory The plugs 13 at both ends of the alloy anastomotic clip are fastened and docked, and the memory alloy anastomotic clip is still directly put in, and finally the ring-shaped pressure plate 2 and the pressure flap 3 are threaded and locked. In order to ensure the same principle and curative effect of the first structure, the structural appearance of the memory alloy anastomotic clip is improved. The plug is not equipped with a polymer material thermal frit, but is directly injected with the socket opened on the connecting pressure plate. become a whole. In this way, the processing technology is improved, from the first injection molding of the first structure to the addition of polymer materials with fast heat melting, and then heat melting together, it becomes direct injection molding one-time integral molding. It not only reduces the cost, but also removes secondary heating when selecting degradable polymer materials, which can reduce the molecular weight loss of the degradable polymer materials, effectively guarantee the strength of the product and make it easier to control the disintegration time of the entire product.

The plug 13 is selected as a memory alloy anastomotic clip with a T-shaped buckle. The cross-section of memory alloy anastomotic gripping arm is a long strip with a semicircular head. After the T-shaped buckle is connected with the socket, the axial freedom of the gripping arm is limited, so that it will not rotate axially, and the socket is completely consistent with the plug. In this way, when the memory alloy anastomotic clip shrinks, the force can be transmitted to the tail of the socket through the grasping arm, so as to be transmitted to the integrated annular pressure plate 2. When assembling, as shown in Figure 4, the grasping arm of the memory alloy anastomotic clip is facing Socket, put it directly in the direction of the axis. The two T-shaped buckles of the memory alloy anastomotic clip correspond to the sockets of the two annular pressure plates 2 one by one. The continuous pressure generated by the memory alloy anastomotic clip can be transmitted to the annular pressure plate 2 through the socket 21 .

Two ring-shaped pressure plates 2 in this structure, the middle part of one of the ring-shaped pressure plates is a smaller shaft hole, and a sleeve 26 is installed in the hole; the other ring-shaped pressure plate is provided with a shaft hole with a larger diameter , the upper part of the shaft hole is a tapered slope 24 with a smaller aperture, and the sleeve 26 connects with the bottom end of the tapered surface 24 of the annular pressure plate to form an independent channel. The inner thread 23 is provided on the ring surface of the conical inclined surface 24, which is used for positioning and locking connection with the external thread on the tool during installation. The convenient sleeve 26 is in the case of the asymmetrical circumference of the product expansion size, and the quick return axis is matched with another annular pressure plate to form a shaft hole to complete the anastomosis; as shown in Figure 5-6, the smaller diameter sleeve 26 The purpose is to make the product have an independent channel, which can well block the contact between the flowing material in the intestine and the anastomotic port of the intestinal stump, so that the anastomotic part of the intestinal wall is in a relatively closed and independent space, which can better prevent intestinal leakage possible. At the same time, it can well block the intestinal content remaining near the memory alloy anastomotic clip, reducing the risk of intestinal obstruction due to the generation of more retained substances; and four inserts evenly distributed every 90° in the circumferential direction are provided on the sleeve. Groove 27 is used for butt jointing of tools during installation, and ring groove 25 is provided at the end of the sleeve, which is used to reduce the impact of material shrinkage and reduce material loss during injection molding.

The pressure flap 3 in this structure is threadedly connected with the external thread 22 of the annular pressure plate through the internal thread 33, and the force transmitted to the annular pressure plate 2 will also be transmitted to the pressure plate through the threaded connection there, finally reflecting Apply pressure to the matching area on the corrugated teeth 31 to achieve the matching effect. In order to avoid the combination error caused by the screw connection, which makes the wavy tooth edge of the anastomotic gap weakly misaligned, a straight edge anastomosis can also be used. The retaining ring 32 provided is to lock the plug of the memory alloy anastomotic clip positioned at the top of the socket after being inserted into the socket, so as to limit its freedom of lateral movement. This type is integrated with the product before leaving the factory, and it can satisfy the functions of opening, clamping and holding when used.

Example 3

As shown in Figures 7-9, the third structure of the disposable self-pressurizing intestinal stapler of the present invention is different from the second structure in that it does not contain a sleeve and adopts a ring-shaped clamp with an enlarged central axis hole. The pressure plate 2 is used to accommodate the sockets 21 of the plugs at both ends of the memory alloy locking insert, which are evenly distributed on the annular plate surfaces of the two annular pressure plates, and the plug 13 is selected as a memory alloy anastomotic clip with double T-shaped buckles in series . The socket 21 is a square shaft hole, which is plugged and assembled by strong pressure, with interference fit and firm fastening. Similarly, the force generated by the memory alloy anastomotic clip will be transmitted to the annular pressure plate 2 through the interference fit there. The portion near the socket in the axial hole in the middle of the annular pressure plate whose central axial hole is enlarged protrudes inward to form a reinforcing rib 28 . In order to strengthen locally, increase the strength of parts, and prevent excessive pressure during assembly, which will cause parts to break and cause them to fail.

The disposable self-pressurizing intestinal stapler of this structure guarantees the same principle and curative effect as the structure 1, compared with the structure 2, the size of the central through hole of the annular pressure plate 2 is improved and the corresponding structure is simplified. The casing of structure 2 is removed, so that the injection molding position of the memory alloy anastomotic clip moves to the outer circumference of the annular pressure plate, so that the effective passage area of the central channel (shaft hole) is greatly increased, and the shaft hole is designed as a square hole for When injection molding with the memory alloy anastomotic clip, it is convenient to locate with the mandrel, thereby improving its processing accuracy. According to the injection molding position of the memory alloy, a flange structure, that is, a reinforcing rib 28 is set around the square hole for local reinforcement. Under different specifications, the passage area of this through hole is basically as large as a round hole with a diameter of about 16mm-25mm, which is basically doubled compared with the BAR central channel with a diameter of about 10mm, which greatly reduces the occurrence of postoperative intestinal healing. The probability of intestinal obstruction, while not losing the effective effect, greatly increases the safety and reduces the probability of complications.

Example 4

As shown in Figures 10-12, the fourth structure of the disposable self-pressurizing intestinal stapler of the present invention, the matching pressurization mechanism consists of a male lock ring 41, a female lock ring 42 and two matching pressurization The structure of the male lock ring 41 and the female lock ring 42 is also an annular plate, and the periphery of the annular plate is processed with external threads. The difference from the annular pressure plate in the structure two and three is that there is no socket 21 on the annular plate . The pressurized petals 3 in the fourth structure are in the shape of a short tube, and the upper parts of the two pressurized petals 3 protrude inward to form retaining rings 32 respectively, and at least four pairs of relative sockets 21 are opened on the two retaining rings 32 for accommodating The plugs at both ends of the memory alloy locking plug-in are fitted with internal threads 21 on the top of the pressurized valve tube, and the internal threads are connected with external threads 32 threaded on the periphery of the lock ring to lock and fix the memory alloy locking plug-in plugs.

This structure uses memory alloy anastomotic clips with T-shaped buckles as the plug. During the assembly process, the assembly direction has changed. The memory alloy anastomotic clips are put into the socket 21 of the retaining ring from the axial position along the direction away from the central axis. The plug Located at the top of the retaining ring, the socket 21 can still limit the axial freedom of the memory alloy anastomotic clip, and limit its axial rotation. In order to prevent its lateral movement, the plug located at the top of the retaining ring is locked through the threaded connection of the inner top internal thread 21 of the pressurized flap and the external thread 32 of the lock ring, so as to achieve the effect of locking and fixing the memory alloy anastomotic clip. The function of the taper inclined surface 24 offered on the pressurizing flap is the same as that in the structure two. A top groove 43 is provided on the lock ring, which is used for docking with corresponding tools for assembly operation. The outermost part of this structure is a lock ring, and the two lock rings are corresponding. The inner ring of the male lock ring is a larger shaft hole 45 (through hole) to install the sleeve 26, and the female lock ring is a smaller through pipe. After assembly, the two naturally form a shaft-hole connection, making it an independent channel formed as a whole. The overall view is shown in Figure 11.

The independent channel acts on the same structure as in the second structure. After all the memory alloy anastomotic clips are connected with the two anastomotic pressure flaps, they are distributed around the circumference of the sleeve. After the male and female locking rings are threadedly connected with the internal threads of the corresponding pressurized flaps, the memory alloy anastomotic clip is locked to make it firmly fixed.

In order to ensure the same principle and curative effect of structure 1, in view of the direct exposure of the anastomotic clip to the inner channel, which may cause intestinal clogging near the anastomotic clip, it is designed as a through-tube structure, without losing the diameter of the inner channel. It retains the effective space for tightening the purse, and also blocks the direct contact between the contents of the intestinal cavity and the anastomotic clip, reducing the risk of intestinal obstruction. , directly put the memory alloy anastomotic clip into the plug slot along the direction away from the central axis, the process is easy and does not require strong pressure assembly, only needs to be placed in butt joints, which brings convenience to the assembly process and makes the entire appearance of the product exquisite and beautiful .

The using method of embodiment 1-4 of the present invention

1. Perform the operation according to the operation method selected by the doctor, and make preparations before the anastomosis: prepare sterile saline at 0°C-5°C, put the disposable self-pressurized intestinal stapler into the sterile saline, and place it carefully. Just submerge the product completely, suitable anastomotic wire or purse forceps;

2. Use any one-time self-pressurizing intestinal stapler in embodiments 1-4 to carry out purse processing on the stump;

3. Use a tool to stretch the disposable self-pressurized intestinal stapler placed in sterile saline to about 10mm, that is, stretch the memory alloy anastomotic clip, move it to the broken end through the clamping tool, and send it into the For the fracture at one end, tighten the pocket of the fracture so that it wraps around half of the pressure plate of the stapler, and tie it tightly to cut off the excess thread;

4. Exit the holding tool, feed it into the fracture at the other end, tighten the purse of the fracture so that it wraps around the other half of the pressure plate of the stapler, and tie it tightly to cut off the excess thread;

5. After checking that the purse is correct, heat the disposable self-pressurized intestinal stapler with 37°C sterile normal saline or rely on body temperature to make the memory alloy recover its shape when heated, so that the anastomotic port will return to its original size and achieve the purpose of anastomosis ;

6. After checking that the anastomosis is correct, the subsequent steps of the operation can be carried out.

Use degradable polymer materials such as PGA, PGLA or PPDO and the disposable self-pressurizing intestinal stapler processed by additive materials and memory alloys, and the products will be completely excreted or disintegrated into small pieces 3-4 weeks after the operation. All lumps are excreted from the body without any residue in the body.

Claims (10)

1. disposable self-pressurized type bowel anastomosis device, it is characterised in that：Including what is matched made of degradable high polymer material Positioning locking mechanism made of two pressing mechanisms and use memorial alloy；The positioning locking mechanism is locked including multiple memorial alloys Plug-in unit is closed, each sealed plug-in unit both ends of memorial alloy are respectively equipped with plug grafting corresponding with two pressing mechanisms, pass through multiple memories The connection of two pressing mechanisms coincide together by the sealed plug-in unit of alloy as connector.

2. disposable self-pressurized type bowel anastomosis device according to claim 1, it is characterised in that：The identical pressing mechanism For the two pressurization valves to match（3）, which is in umbrella, circular shaft bore is provided in the middle part of umbrella, around two pressurizations to match Be uniformly provided on the umbrella face of valve correspond be in socket（21）；It inserts at the sealed plug-in unit both ends of each memorial alloy Head（13）With a pair of of socket（21）Corresponding grafting.

3. disposable self-pressurized type bowel anastomosis device according to claim 2, it is characterised in that：Install macromolecule on plug additional Material hot melt block, the socket that opens up on the valve that pressurizes（21）Top in hole expands to form boss strip socket（211）, the Kong Yujia Integrated molding is heated after having filled the plug grafting of high molecular material hot melt block.

4. disposable self-pressurized type bowel anastomosis device according to claim 1, it is characterised in that：

The pressing mechanism that matches is provided with two annular increased pressure boards of axis hole by center（2）With the two pressurization valves to match（3）Group Into；The pressurization valve（3）Top surface annular retaining ring（32）, the baffle ring（32）Periphery extends to form the identical end of tubulose downward, The end inner wall that coincide is equipped with internal thread（33）, annular increased pressure board（2）Circumference be equipped with and the matched external screw thread of the internal thread（22）, The external screw thread of two annular increased pressure boards（22）At least four pairs of corresponding sockets are evenly equipped on face（21）, for accommodating memorial alloy lock Close the plug at plug-in unit both ends（13）, each sealed plug-in unit both ends plug of memorial alloy（13）It is respectively embedded into corresponding a pair Socket（21）It is interior, two annular increased pressure boards（2）With two pressurization valves（3）Corresponding be threadedly coupled locks the sealed plug-in unit of memorial alloy.

5. disposable self-pressurized type bowel anastomosis device according to claim 4, it is characterised in that：The two annular pressurizations The annular increased pressure board that central shaft hole increases centered on plate, the socket for being used to accommodate the sealed plug-in unit both ends plug of memorial alloy （21）It is corresponding to be distributed in two annular increased pressure boards（2）On the annular plate surface of periphery, each memorial alloy is sealed to be inserted Part both ends plug（13）Corresponding a pair of of socket is inserted into respectively（21）It is interior, two annular increased pressure boards（2）With two identical pressurization valves（3） Corresponding be threadedly coupled locks the sealed plug-in unit of memorial alloy.

6. disposable self-pressurized type bowel anastomosis device according to claim 5, it is characterised in that：The central shaft hole increases Annular increased pressure board（2）Position in the axis hole at middle part close to socket protrudes inwardly to form reinforcing rib（28）.

7. disposable self-pressurized type bowel anastomosis device according to claim 1, it is characterised in that：The pressuring machine that matches Structure is by male and female lock ring（41,42）With the two pressurization valves to match（2）Composition；The pressurization valve（2）In short tube shape, two pressurization valve pipes （2）Interior top is inwardly projecting to be respectively formed baffle ring（32）, two baffle rings（32）On be provided at least four pairs of opposite sockets（21）, For accommodating the plug at the sealed plug-in unit both ends of memorial alloy（13）, the top coincideing in pressurization valve pipe is equipped with internal thread（33）, should Internal thread（33）The external screw thread being equipped with lock ring periphery（22）It is threadedly coupled the sealed plug-in unit plug of locked and fixed memorial alloy（13）.

8. the disposable self-pressurized type bowel anastomosis device according to claim 4 or 7, it is characterised in that：It further includes and passes through set Cylinder（26）The independent passage formed after all sealed plug-in units of memorial alloy connect with the two pressurization valves to match, is distributed in this Sleeve（26）Periphery outside；The sleeve（26）Mounted on public lock ring（41）Axis hole in, the other end of sleeve penetrates female lock ring （42）Axis hole in form independent passage；Or two annular increased pressure board the cone inclined-plane that becomes smaller in aperture of top（24）, it is described Wherein one annular increased pressure board in the middle part of installation sleeve in axis hole（26）With the cone inclined-plane of another annular increased pressure board（24）Bottom connects Form independent passage.

9. according to the disposable self-pressurized type bowel anastomosis device of claim 1-7 any one of them, it is characterised in that：The memory The middle part of the sealed plug-in unit of alloy is open memory alloy deformation ring（11）, which extends outwardly to form gripping arm（12）, The plug（13）Two gripping arm ends are respectively arranged on, plug is adapted to socket, for T-shaped buckle or double-T shaped buckle of connecting.

10. the disposable self-pressurized type bowel anastomosis device according to claim 2,3,4,5,6 or 7, it is characterised in that：Phase The identical side of two identical pressurization valve ends（31）It is set to the straight flange mutually coincideing or mutually ratcheting waveform side.