Memory alloy pneumoperitoneum-free device and assembling and application method thereof

Abstract

The invention relates to the technical field of medical equipment, in particular to a memory alloy pneumoperitoneum-free device and an assembly and application method thereof. Comprising a deformation pipe, a liquid injection connector and a liquid drainage connector. The deformation pipe is made of memory alloy, liquid with different temperatures is injected into the deformation pipe to change the shape, and the deformation pipe comprises a straight pipe in a non-deformation state and a bent pipe in a deformation state. A liquid inlet is formed in the liquid injection joint, a liquid outlet is formed in the liquid discharge joint, connecting through holes are formed in the liquid injection joint and the liquid discharge joint, one end of each connecting through hole is communicated with the liquid inlet or the liquid outlet, the other end of each connecting through hole is inserted into the deformation pipe, and the liquid injection joint is communicated with the liquid discharge joint through the deformation pipe; a plurality of connecting through holes are formed in the liquid injection connector and the liquid drainage connector, a plurality of deformation pipes are arranged, and the two ends of each deformation pipe are connected with the connecting through holes in the corresponding hole positions of the liquid injection connector and the liquid drainage connector in an inserted mode. The operation is simple, the implantation is convenient, the operation difficulty is greatly reduced, and the unique memory alloy deformation function can be well matched with doctors to complete the establishment work of a laparoscopic operation space.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, and is a memory alloy pneumoperitoneum-free device and an assembly and application method thereof. Background Art

[0002] At the end of the 19th century and the beginning of the 20th century, early laparoscopes were all pneumoperitoneum-free. At that time, people did not know how to use pneumoperitoneum. The operating space was small and the scope of use was very limited. Only some simple examinations could be performed, and the development of laparoscopic technology was difficult. In the 1920s, scientists invented carbon dioxide pneumoperitoneum, which greatly expanded the field of vision and operating space of laparoscopic surgery, making its diagnostic and treatment functions very good. Laparoscopic technology also completed its first transformation and entered a golden period of rapid development. Since then, with the emergence of video laparoscopes and the improvement of surgical instruments, some surgical taboos have been broken one after another, and laparoscopic technology has achieved unprecedented development in various fields. In the words of an expert, "laparoscopic technology has entered a new era of minimally invasive surgery with a bold step." However, when laparoscopic technology entered the field of tumor surgery, it was uneasy and hesitant, because people were most worried about whether pneumoperitoneum would cause tumor cells to implant and spread in the abdominal cavity; in addition, complications such as subcutaneous emphysema, increased abdominal pressure, vascular embolism, and limited cardiopulmonary function caused by pneumoperitoneum also made people daunted. Therefore, scientists turned their attention to pneumoperitoneum-free surgery again, and the suspension laparoscope came into being. The suspension laparoscope was first used by the Japanese in the 1990s and later introduced to my country. Compared with traditional laparoscopy, the suspension laparoscope has many advantages: it does not have some complications inherent in pneumoperitoneum, there is no need to consider the leakage of carbon dioxide gas during the operation, the instruments required for the operation are relatively simple, and the economic burden on patients is relatively light. In theory, it should be an ideal surgical procedure for treating tumors, but why is its development so faltering and slow? This is mainly because its operating space is relatively small. According to the suspension method recommended by the Japanese, only some small operations such as cholecystectomy and uterine myomectomy can be performed, so it has been neglected by surgeons who are accustomed to pneumoperitoneum technology. In recent years, in long-term clinical practice, we have observed that as long as the abdominal wall suspension method is scientific and appropriate, it can provide sufficient working space and successfully complete large operations such as pneumoperitoneum-free radical resection of colorectal cancer.

[0003] As mentioned above, an inflatable laparoscopic pneumoperitoneum-free device is disclosed in the prior art, with application number: CN201310560359.X, application date: 2013.11.12, publication (announcement) number: CN103565483B, and publication (announcement) date: 2016.08.17. An inflatable laparoscopic pneumoperitoneum-free device includes a switch, an air bag, a lifting wire, a support rod, and a sleeve. The air bag is provided with an inflation hose, and the end of the inflation hose is connected to the switch. One end of the support rod is connected to the upper part of the air bag, and the other end of the support rod is connected to the lower part of the air bag. One end of the lifting wire is connected to the support rod or the upper part of the air bag, and the sleeve is an independent sleeve. The present invention avoids the bilateral abdominal walls gathering to the middle, squeezing the intestinal tube to concentrate to the middle, resulting in a smaller and narrower surgical space, and better solves the problem of insufficient exposure of the surgical space in the existing pneumoperitoneum-free technology. More importantly, the hollow form of the present invention does not require lifting and can realize barrier-free operation of surgical instruments. It is suitable for both multi-port laparoscopic pneumoperitoneum surgery and single-port laparoscopic pneumoperitoneum surgery. The inflation pressure of the above equipment is a key link. If the inflation pressure is not properly controlled, the surgical requirements cannot be met. During the operation, sharp knives, saws, and pointed needles accidentally touch the gas supply equipment, which is also a greater risk. Based on the above problems, a memory alloy pneumoperitoneum-free device with convenient operation and stable support is developed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a memory alloy pneumoperitoneum-free device with the advantages of simple operation, convenient insertion and removal, greatly reduced surgical difficulty, and shortened patient recovery period, etc., in view of the shortcomings and complex operation of the prior art. The pneumoperitoneum-free laparoscopic technology is accepted by the majority of clinicians and patients due to its advantages of fast postoperative recovery and less bleeding. It is mainly suitable for departments involving laparoscopic minimally invasive surgery, such as obstetrics, gynecology, gastroenterology and other departments.

[0005] In order to solve the technical problem of the present invention, the following technical solution is adopted: A memory alloy pneumoperitoneum-free device includes a deformation tube, a liquid injection joint and a liquid discharge joint; the deformation tube is made of a memory alloy, and liquids of different temperatures are injected into the deformation tube to change its shape, a straight tube in an undeformed state and a bent tube in a deformed state; the liquid injection joint is provided with a liquid inlet, the liquid discharge joint is provided with a liquid outlet, the liquid injection joint and the liquid discharge joint are provided with connecting through holes, one end of the connecting through hole is connected to the liquid inlet or the liquid outlet, the other end of the connecting through hole is inserted into the deformation tube, and the liquid injection joint is connected to the liquid discharge joint through the deformation tube; there are multiple connecting through holes on the liquid injection joint and the liquid discharge joint, and there are multiple deformation tubes, and the two ends of each deformation tube are plugged with the connecting through holes of the corresponding holes of the liquid injection joint and the liquid discharge joint. After the other end of the connecting through hole is inserted into the deformation tube, the gap between the connecting through hole and the deformation tube can be sealed with a plug made of rubber or silicone. Or hot melt adhesive can be used to fill the gap between the connecting through hole and the deformation tube for bonding.

[0006] The injection joint and the drainage joint are provided with a plurality of connecting through holes, the number of which is 10, 12, 14, 16, 18, 20 or 22, and the connecting through holes are arranged at equal intervals, and the center of each connecting through hole is at the same distance from the center of the injection joint or the drainage joint. The number of connecting through holes can be selected according to the body shape of children and adults. Children need less support and can select a smaller number of connecting through holes. Adults need greater support and can select a larger number of connecting through holes. For obese patients with thick abdominal walls, the number of connecting through holes can be increased to further enhance the support strength.

[0007] A support limit frame is provided in the connecting through hole, and the support limit frame is composed of two support cards spliced ​​together, and the support limit frame frame body is arranged in a triangular shape; one end of the two support cards is fixedly connected as a fixed end, and the other end of the two support cards is a free end, the fixed end is fixedly connected to the inner wall of the connecting through hole, and the free end is in contact with the inner wall of the connecting through hole; The deformation tube is provided with fitting baffles on both sides, which are arranged along the axial direction of the deformation tube and symmetrically distributed along the center of the deformation tube; one end of the fitting baffle is fixedly connected to the deformation tube, and the other end of the fitting baffle is fitted with the inner wall of the connecting through hole and the support limit frame, and the fitting baffles on both sides of the deformation tube are fitted with the two support cards of the support limit frame respectively; the deformation tube body is fitted with the two support cards of the support limit frame. The expansion and angle of the deformation tube are ensured by limiting the position of each support limit frame.

[0008] The deformable tube is divided into a deformable section and an undeformable section, which are spliced ​​in sections. The undeformable section is located at both ends of the deformable section. The deformable section of the deformable tube is made of memory alloy, and the undeformable section of the deformable tube is made of stainless steel. The deformable section is arched for support, and the undeformable section is used to plug the injection joint and the drainage joint, and each deformable tube is limited and supported by fitting the baffle and the support limit frame.

[0009] The connecting through holes are divided into a central through hole, an upper through hole and a lower through hole. There are two central through holes. The center of the central through hole is located on the horizontal midline of the injection joint or the discharge joint, the upper through hole is located above the horizontal midline, and the lower through hole is located below the horizontal midline; support limit frames are arranged in the central through hole, the upper through hole and the lower through hole, and the angles of the support limit frames in the two central through holes are opposite, and the angles of the support limit frames of the upper through hole and the lower through hole are toward the horizontal midline.

[0010] Support and limit frames are arranged in the central through hole, the upper through hole and the lower through hole. The support and limit frames are arranged in a right triangle, and the angle of the support and limit frames faces the center of the injection joint or the discharge joint.

[0011] A one-way valve is arranged on the end of the deformation tube, and the deformation tube is inserted into the central through hole and the upper through hole to form a memory alloy pneumoperitoneum-free cage frame, the memory alloy pneumoperitoneum-free cage frame is hemispherical, and the lower through hole where the deformation tube is not inserted is plugged with a plug for sealing; Or the deformation tube is inserted into the central through hole and the lower through hole to form a memory alloy pneumoperitoneum-free cage frame, the memory alloy pneumoperitoneum-free cage frame is hemispherical, and the upper through hole without the deformation tube is plugged into the plug for sealing. The lower through hole can be used as a spare hole. When the upper through hole is blocked or damaged, it is directly replaced with the lower through hole, which is convenient for improving the service life of the injection joint and the discharge joint.

[0012] A one-way valve is provided on the end of the deformation tube. The deformation tube is inserted into the central through hole, the upper through hole and part of the lower through hole to form a memory alloy pneumoperitoneum-free cage. The memory alloy pneumoperitoneum-free cage is hemispherical or spherical. The lower through hole where the deformation tube is not inserted is plugged with a plug for sealing. In conventional use, the hemispherical memory alloy pneumoperitoneum-free cage is formed by inserting the deformation tube into the upper through hole or the lower through hole. When a wider support area and angle are required, some lower through holes can be added on the basis of the upper through hole being filled with the deformation tube to form a spherical memory alloy pneumoperitoneum-free cage, thereby increasing the support area and angle. The deformation tube is a memory alloy multi-pass deformation tube. 0°C cold water is passed into the deformation tube to keep the straight tube in the unchanged deformation state; 37±4°C warm water is passed into the deformation tube to keep the first deformation state of the bent tube, the radius of the bent tube is 300-1100mm, and the arch height of the bent tube is 100-200mm; 45±2°C warm water is passed into the deformation tube to keep the second deformation state of the bent tube, the arch height of the second deformation state is higher than the arch height of the first deformation state, and the arch height of the second deformation state is 5-6mm higher. The first deformation state of the bent tube is open and supported but not fully opened, which is convenient for adjusting the position and positioning inspection in the supported state. The second deformation state of the bent tube is fully opened, effectively achieving full support. In this case, multi-pass deformation is achieved by passing hot water of different temperatures to reduce the difficulty in surgery. The deformation tube is a memory alloy multi-pass deformation tube, which can be plasticized in the production stage and stimulated by hot water of different temperatures. At the same time, another advantage of the memory alloy multi-pass deformation tube is that the shape support fixed state is long-lasting and stable. When it needs to be recycled, it needs to be shrunk to a straight tube in a non-deformed state by passing 0℃ cold water. The entire deformation takes into account multi-pass deformation and excitation recovery to ensure that each state is stable and effective.

[0013] A method for assembling and applying a memory alloy pneumoperitoneum-free device comprises the following steps: S1. Hole position selection Insert a deformation tube into the connecting through hole of the injection joint, and insert the other end of the deformation tube into the corresponding connecting through hole of the discharge joint to form a memory alloy pneumoperitoneum-free cage; adjust the pipe density and cage coverage area by increasing or decreasing the number of deformation tubes; S2, limit card connection The angle of the support and limit frame in the connecting through hole is adjusted, and then the triangular opening direction of the support and limit frame is adjusted, and the deformation tube is bent and arched along the triangular opening direction of the frame; S3, multi-range deformation adjustment When expanding, 37±4℃ warm water is introduced into the deformation tube to keep the tube bent in the first deformation state, and 45±2℃ warm water is introduced into the deformation tube to keep the tube bent in the second deformation state; when contracting, 0℃ cold water is introduced into the deformation tube to shrink to a straight tube without deformation; S4, fast recycling In the second deformation state, liquid nitrogen is introduced into the deformation tube to shrink the tube to a straight tube in a non-deformed state.

[0014] The present invention discloses a memory alloy pneumoperitoneum-free device. It belongs to the field of laparoscopic surgery, and its purpose is to solve the problem that the laparoscopic pneumoperitoneum-free device in the prior art may cause trauma and is complicated to operate, and to provide a laparoscopic pneumoperitoneum-free fixing frame that is simple to operate and does not cause pain. The present invention has a simple structure, is easy to manufacture, and is convenient to operate, which is conducive to popularization and use. The memory alloy pneumoperitoneum-free device of the present invention overcomes the problem that traditional pneumoperitoneum-free devices are difficult to insert / remove, is simple to operate, and is easy to insert, which greatly reduces the difficulty of surgery. The unique memory alloy deformation function cooperates well with doctors to complete the establishment of laparoscopic surgical space, and effectively improves the difficulty of the original creation of large wounds and the long recovery period. At the same time, it can also effectively prevent the risks that may be caused by the original carbon dioxide to establish pneumoperitoneum, which can effectively reduce the risk of pneumoperitoneum surgery while reducing the pain for patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a memory alloy pneumoperitoneum-free device of the present invention before overall deformation; Figure 2 It is a schematic diagram of the axial side of a memory alloy pneumoperitoneum-free device of the present invention before deformation; Figure 3 It is a schematic diagram of the overall deformation of a memory alloy pneumoperitoneum-free device of the present invention; Figure 4 This is a schematic diagram of a water injection joint of a memory alloy pneumoperitoneum-free device of the present invention; Figure 5 It is a schematic diagram of the axial side of a memory alloy pneumoperitoneum-free device after deformation of the present invention; Figure 6 It is a schematic diagram of the overall deformation of a memory alloy pneumoperitoneum-free device of the present invention; Figure 7 This is a schematic diagram of the deformation tube structure of a memory alloy pneumoperitoneum-free device in the present invention; Figure 8 It is a deformation schematic diagram of the first deformation state and the second deformation state of the present invention; Fig. 9This is a schematic diagram of a support and limiting frame of a memory alloy pneumoperitoneum-free device according to the present invention; Fig.10 It is a schematic diagram of the assembly of the support limit frame; Fig.11 This is a schematic diagram of a 10-hole memory alloy pneumoperitoneum-free device according to the present invention; Fig.12 It is a schematic diagram of the symmetrical distribution of the upper through holes and the lower through holes along the horizontal median line of the joint; Fig.13 This is a schematic diagram of the central through hole, upper through hole, and lower through hole being evenly distributed radially along the joint.

[0016] Deformable tube 1, liquid injection joint 2, liquid discharge joint 3, liquid inlet 4, liquid outlet 5, connecting through hole 6, support limit frame 7, fitting baffle 8, plug 9, deformable section 101, non-deformable section 102, central through hole 601, upper through hole 602, lower through hole 603. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings: A memory alloy pneumoperitoneum-free device comprises a deformation tube 1, an injection joint 2 and a drainage joint 3; the deformation tube 1 is made of memory alloy, and liquids of different temperatures are injected into the deformation tube 1 to change its shape, a straight tube in an undeformed state and a curved tube in a deformed state; the injection joint 2 is provided with a liquid inlet 4, and the drainage joint 3 is provided with a liquid outlet 5, and the injection joint 2 and the drainage joint 3 are provided with a connecting through hole 6, one end of the connecting through hole 6 is connected with the liquid inlet 4 or the liquid outlet 5, and the other end of the connecting through hole 6 is inserted into the deformation tube 1, and the injection joint 2 is connected with the drainage joint 3 through the deformation tube 1; there are a plurality of connecting through holes 6 on the injection joint 2 and the drainage joint 3, and a plurality of deformation tubes 1 are provided, and both ends of each deformation tube 1 are plugged into the connecting through holes 6 at corresponding holes of the injection joint 2 and the drainage joint 3.

[0018] The injection joint 2 and the drainage joint 3 are provided with a plurality of connecting through holes 6, the number of the connecting through holes 6 being 10, 12, 14, 16, 18, 20 or 22, the connecting through holes 6 being arranged at equal intervals, and the center of each connecting through hole 6 being at the same distance from the center of the injection joint 2 or the drainage joint 3. The gap size of the deformable tube can also be realized by matching the angle of the limit baffle in the hole, so as to facilitate the insertion of the puncture instrument during the operation.

[0019] A support and limit frame 7 is provided in the connecting through hole 6, and the support and limit frame 7 is composed of two support cards spliced ​​together, and the support and limit frame 7 is arranged in a triangular shape; one end of the two support cards is fixedly connected as a fixed end, and the other end of the two support cards is a free end, the fixed end is fixedly connected to the inner wall of the connecting through hole 6, and the free end is in contact with the inner wall of the connecting through hole 6; The deformation tube 1 is provided with fitting baffles 8 on both sides, which are arranged along the axial direction of the deformation tube 1 and symmetrically distributed along the center of the deformation tube 1; one end of the fitting baffle 8 is fixedly connected to the deformation tube 1, and the other end of the fitting baffle 8 fits with the inner wall of the connecting through hole 6 and the support limit frame 7, and the fitting baffles 8 on both sides of the deformation tube 1 fit with the two support cards of the support limit frame 7 respectively; the body of the deformation tube 1 fits with the two support cards of the support limit frame 7. The above structure effectively locks the angle of each deformation tube 1, and the above structure is stable and reliable, and the support clamping between the components is firm, which is particularly suitable for abdominal support. The exposed part of the overall structure is only the deformation tube and the joint, which is convenient for removing the instrument after the operation and should not leave parts in the abdominal cavity.

[0020] The deformable tube 1 is divided into a deformable section 101 and a non-deformable section 102. The deformable section 101 and the non-deformable section 102 are spliced ​​in sections. The non-deformable section 102 is located at both ends of the deformable section 101. The deformable section 101 of the deformable tube 1 is made of memory alloy, and the non-deformable section 102 of the deformable tube 1 is made of stainless steel.

[0021] like Fig.12 The upper through hole and the lower through hole are symmetrically distributed along the horizontal midline of the joint. The connecting through hole 6 is divided into a central through hole 601, an upper through hole 602 and a lower through hole 603. There are two central through holes 601. The center of the central through hole 601 is located on the horizontal midline of the injection joint 2 or the discharge joint 3, the upper through hole 602 is located above the horizontal midline, and the lower through hole 603 is located below the horizontal midline; support limit frames 7 are arranged in the central through hole 601, the upper through hole 602 and the lower through hole 603, and the angles of the support limit frames 7 in the two central through holes 601 are opposite, and the angles of the support limit frames 7 of the upper through hole 602 and the lower through hole 603 are toward the horizontal midline.

[0022] like Fig.13 The central through hole, upper through hole and lower through hole are evenly distributed radially along the joint. A support and limiting frame 7 is arranged in the central through hole 601, the upper through hole 602 and the lower through hole 603. The support and limiting frame 7 is arranged in a right-angled triangle, and the angle of the support and limiting frame 7 is toward the center of the injection joint 2 or the discharge joint 3.

[0023] A one-way valve is provided at the end of the deformation tube 1. The deformation tube 1 is inserted into the central through hole 601 and the upper through hole 602 to form a memory alloy pneumoperitoneum-free cage. The memory alloy pneumoperitoneum-free cage is hemispherical. The lower through hole 603 where the deformation tube 1 is not inserted is plugged with a plug 9 for sealing. The above is a conventional memory alloy pneumoperitoneum-free device.

[0024] When the upper through hole 602 of the conventional memory alloy pneumoperitoneum-free device is deformed by force and cannot be inserted, blocked and ventilated, etc., the position is turned over and adjusted to insert the deformation tube 1 into the central through hole 601 and the lower through hole 603 to form a memory alloy pneumoperitoneum-free cage frame, the memory alloy pneumoperitoneum-free cage frame is hemispherical, and the upper through hole 602 without the deformation tube 1 is plugged with a plug 9 for sealing, thereby improving the service life of the joint pipe fittings.

[0025] In addition, for patients with obesity and bone defects, the number of deformation tubes 1 is increased by partially using the lower through holes 603 to achieve more stable support. A one-way valve is provided on the end of the deformation tube 1. The deformation tube 1 is inserted into the central through hole 601, the upper through hole 602 and part of the lower through holes 603 to form a memory alloy pneumoperitoneum-free cage. The memory alloy pneumoperitoneum-free cage is hemispherical or spherical. The lower through holes 603 where the deformation tube 1 is not inserted are plugged with plugs 9 for sealing.

[0026] The deformation tube 1 is a multi-pass deformation tube of memory alloy. When cold water of 0°C is introduced into the deformation tube 1, it remains a straight tube in an unchanged deformation state. When warm water of 37±4°C is introduced into the deformation tube 1, it remains a bent tube in a first deformation state, with a bending radius of 300-1100mm and a bending height of 100-200mm. When warm water of 45±2°C is introduced into the deformation tube 1, it remains a bent tube in a second deformation state, with a bending height higher than that of the first deformation state, and the bending height in the second deformation state is 5-6mm higher.

[0027] A method for assembling and applying a memory alloy pneumoperitoneum-free device comprises the following steps: S1. Hole position selection Insert the deformation tube 1 into the connecting through hole 6 of the injection joint 2, and insert the other end of the deformation tube 1 into the corresponding connecting through hole 6 of the discharge joint 3 to form a memory alloy pneumoperitoneum-free cage; adjust the pipe density and cage coverage area by increasing or decreasing the number of deformation tubes 1; S2, limit card connection Adjust the angle of the support and limit frame 7 in the connecting through hole 6, and then adjust the triangular opening direction of the support and limit frame 7, so that the deformation tube 1 bends and arches along the triangular opening direction of the frame; S2, limit card connection Adjust the angle of the support and limit frame 7 in the connecting through hole 6, and then adjust the triangular opening direction of the support and limit frame 7, so that the deformation tube 1 bends and arches along the triangular opening direction of the frame; S3, multi-range deformation adjustment When expanding, 37±4℃ warm water is introduced into the deformation tube 1 to keep the tube bent in the first deformation state, and 45±2℃ warm water is introduced into the deformation tube 1 to keep the tube bent in the second deformation state; when contracting, 0℃ cold water is introduced into the deformation tube 1 to shrink to a straight tube in the non-deformed state; S4, fast recycling In the second deformation state, liquid nitrogen is introduced into the deformation tube 1 to shrink the tube to a straight tube in the non-deformation state.

[0028] like Figure 1 , 2 As shown in Figure 3, a memory alloy pneumoperitoneum-free device includes a deformation tube 1, a liquid injection joint 2 and a liquid discharge joint 3. A plurality of deformation tubes 1 form a deformation tube assembly. The deformation tube 1 begins to bend at 37±4°C after body temperature or warm water injection, slowly deforms and stretches the abdominal cavity to the first deformation state, and stimulates the second deformation at a temperature of 45±2°C to reach the final state and reach the surgical position. Since the first deformation state does not completely stretch the abdominal cavity, it is convenient for doctors to adjust the support position in the abdominal cavity. Compared with the existing technology products, the first deformation state reduces the difficulty of doctors' operation. The existing technology products need to adjust the gas pressure or the distance of the connector to control the support position. Careless operation will cause offset and dislocation. The operation in the abdominal cavity is difficult and requires high precision. Once the adjustment is wrong, it will cause greater secondary damage to the patient. At the same time, the first deformation state is only incompletely stretched, and the overall structure of the memory alloy pneumoperitoneum-free device is more stable. Through the overall deformation of the memory alloy, the temperature does not change and does not affect the overall shape. Then, by stimulating the second deformation at a temperature of 45±2°C to reach the surgical position, the supporting shape and size of the deformable tube assembly can be effectively controlled by controlling the temperature of the introduced water. After the operation is completed, 0°C cold water is introduced into the deformable tube 1 to shrink it back to a straight tube in an undeformed state. In special cases, when a quick reset is required to end the operation, liquid nitrogen can be directly introduced to quickly restore the straight tube, and the tube can be straightened and removed from the body by external force to complete the operation. The present invention has a simple structure, is easy to manufacture, and is easy to operate, which is conducive to popularization and use.

[0029] The size of the deformable tube 1 can be customized according to the patient's abdominal cavity state. Generally, children can use a deformable tube with a deformation radius of 300-800mm to expand the abdominal cavity space, and adults can use a deformable tube with a deformation radius of 500-1100mm to expand the abdominal cavity. Children generally use a deformable tube of 400-500mm in length, and reserve 50mm of non-deformable length at both ends of the deformation tube as a hand-held section when external force is applied. Women generally can use a deformable tube of 600-850mm, and reserve 50mm of non-deformable length at both ends of the deformation tube as a hand-held section when external force is applied. Men generally need to use a deformable tube of 800-1000mm, and reserve 50mm of non-deformable length at both ends of the deformation tube as a hand-held section when external force is applied. At the same time, at least about 50-100mm is reserved at both ends of the deformation tube 1. The non-deformable section 102 is used as a hand-held section when external force is applied. The injection joint 2 is plugged or welded with the deformation tube at the left end of the deformation tube, and a one-way valve is arranged inside the injection joint 2. When the deformation tube is not plugged in, it is in a closed state. The injection joint 2 can select joints with different numbers of holes according to the patient's body shape and abdominal cavity pressure. The conventional joint is a 10-hole or 14-hole joint. If the patient is obese, a special specification 18-22-hole joint can be selected, which is convenient for connecting with more deformation tubes 1, which is more conducive to propping up the abdominal cavity to create an empty stomach environment. The drainage joint 3 is in the shape The right end of the deformable tube is plugged or welded to the deformable tube, and a one-way valve is arranged inside the discharge joint 3. When the deformable tube is not plugged in, it is in a closed state. The injection joint 2 can select joints with different numbers of holes according to the patient's body shape and abdominal cavity strength. The conventional joint is a 10-hole or 14-hole joint. If the patient is obese, a special specification 18-22-hole joint can be selected. It is convenient to connect with more deformable tubes 1, which is more conducive to supporting the abdominal cavity to create an empty stomach environment. At the same time, the limit baffle arranged inside the discharge joint 3 behind the injection joint 2 controls the gap between the deformable tubes through the angle.

[0030] The temperature of the first deformation state of the deformable tube 1 is when the body temperature is 37±4℃, the deformation radius of the deformable tube for children is 300-800mm, and the deformation radius of the deformable tube for adults is 500-1100mm. After injecting 45±2℃ water / liquid nitrogen, the deformable tube can expand outward again by 5mm to reach a fixed state and will no longer be deformed by external force. After the operation is completed, 0℃ water / liquid nitrogen is injected into the deformable tube, and the tube body recovers its deformation. After applying external force, it can be easily removed from the body. The tube body has been plasticized in the early process plasticization, and the tube body will only deform along one side set by the plasticization process, and finally form a hemispherical support state.

[0031] Different types of injection joints 2 and drainage joints 3 can be selected to connect the deformation tubes according to the gap size between the two deformation tubes required for the puncture site of the abdominal surgery. For example, if the size between the two deformation tubes required for laparoscopic surgery is 50-60mm, then we can choose to use a deformation radius of 1100mm for the deformation tube, and select a 10-hole injection joint 2 and drainage joint 3 for connection. The injection joint 2, drainage joint 3 and deformation tube 1 are all provided with a support limit frame 7, and the angle between the centers of the two adjacent holes of the injection joint 2 and drainage joint 3 is 36 degrees. Different operations require the selection of different deformation tubes 1, injection joints 2 and drainage joints 3 according to actual clinical conditions.

[0032] A support limit frame 7 and a deformation tube plug-in hole are set in the central through hole 601, the upper through hole 602 and the lower through hole 603. Except for the two holes marked as shared, the other holes are single non-shared holes, which can effectively prevent the hole position from being replaced when the single-side hole cannot effectively insert the deformation tube. For example, a 10-hole joint has 4 holes on both sides that are separately set except the shared hole. In a single operation, the shared hole and the 4 holes on one side can be selected to plug the deformation tube.

Claims

1. A memory alloy pneumoperitoneum-free device, characterized in that: The invention comprises a deformation tube (1), a liquid injection joint (2) and a liquid discharge joint (3); the deformation tube (1) is made of a memory alloy, and the deformation tube (1) changes its shape by injecting liquids of different temperatures into the deformation tube (1), and forms a straight tube in an undeformed state and a bent tube in a deformed state; the liquid injection joint (2) is provided with a liquid inlet (4), and the liquid discharge joint (3) is provided with a liquid outlet (5); the liquid injection joint (2) and the liquid discharge joint (3) are provided with connecting through holes (6); one end of the connecting through hole (6) is connected to the liquid inlet (4) or the liquid outlet (5), and the other end of the connecting through hole (6) is inserted into the deformation tube (1); the liquid injection joint (2) is connected to the liquid discharge joint (3) through the deformation tube (1); a plurality of connecting through holes (6) are provided on the liquid injection joint (2) and the liquid discharge joint (3), and a plurality of deformation tubes (1) are provided; and both ends of each deformation tube (1) are plugged into the connecting through holes (6) at corresponding positions of the liquid injection joint (2) and the liquid discharge joint (3).

2. According to claim 1, a memory alloy pneumoperitoneum-free device, characterized in that: The injection joint (2) and the discharge joint (3) are provided with a plurality of connecting through holes (6), the number of the connecting through holes (6) being 10, 12, 14, 16, 18, 20 or 22, the connecting through holes (6) being arranged at equal intervals, and the center of each connecting through hole (6) being at the same distance from the center of the injection joint (2) or the discharge joint (3).

3. A memory alloy pneumoperitoneum-free device according to claim 2, characterized in that: A support and limit frame (7) is provided in the connecting through hole (6), and the support and limit frame (7) is composed of two support cards spliced ​​together, and the support and limit frame (7) is arranged in a triangular shape; one end of the two support cards is fixedly connected as a fixed end, and the other end of the two support cards is a free end, the fixed end is fixedly connected to the inner wall of the connecting through hole (6), and the free end is in contact with the inner wall of the connecting through hole (6); The deformation tube (1) is provided with fitting baffles (8) on both sides, the fitting baffles (8) are arranged to extend axially along the deformation tube (1), and are symmetrically distributed along the center of the deformation tube (1); one end of the fitting baffle (8) is fixedly connected to the deformation tube (1), and the other end of the fitting baffle (8) is fitted with the inner wall of the connecting through hole (6) and the support limit frame (7); the fitting baffles (8) on both sides of the deformation tube (1) are respectively fitted with two support cards of the support limit frame (7) for position limiting support; the deformation tube (1) body is fitted with the two support cards of the support limit frame (7) for support.

4. The memory alloy pneumoperitoneum-free device according to claim 1, characterized in that: The deformable tube (1) is divided into a deformable section (101) and a non-deformable section (102), the deformable section (101) and the non-deformable section (102) being assembled in sections, the non-deformable section (102) being located at both ends of the deformable section (101), the deformable section (101) of the deformable tube (1) being made of a memory alloy, and the non-deformable section (102) of the deformable tube (1) being made of stainless steel.

5. According to claim 4, a memory alloy pneumoperitoneum-free device, characterized in that: The connecting through hole (6) is divided into a central through hole (601), an upper through hole (602) and a lower through hole (603). Two central through holes (601) are provided. The center of the central through hole (601) is located on the horizontal midline of the injection joint (2) or the discharge joint (3). The upper through hole (602) is located above the horizontal midline, and the lower through hole (603) is located below the horizontal midline. Support and limit frames (7) are provided in the central through hole (601), the upper through hole (602) and the lower through hole (603). The included angles of the support and limit frames (7) in the two central through holes (601) are opposite to each other, and the included angles of the support and limit frames (7) in the upper through hole (602) and the lower through hole (603) are oriented toward the horizontal midline.

6. The memory alloy pneumoperitoneum-free device according to claim 5, characterized in that: A support and limit frame (7) is arranged in the central through hole (601), the upper through hole (602) and the lower through hole (603); the support and limit frame (7) is arranged in a right-angled triangle, and the included angle of the support and limit frame (7) is oriented toward the center of the injection joint (2) or the discharge joint (3).

7. The memory alloy pneumoperitoneum-free device according to claim 4, characterized in that: A one-way valve is provided at the end of the deformation tube (1); the deformation tube (1) is inserted into the central through hole (601) and the upper through hole (602) to form a memory alloy pneumoperitoneum-free cage frame; the memory alloy pneumoperitoneum-free cage frame is hemispherical; the lower through hole (603) not inserted with the deformation tube (1) is plugged with a plug (9) for sealing; Or the deformation tube (1) is inserted into the central through hole (601) and the lower through hole (603) to form a memory alloy pneumoperitoneum-free cage frame, the memory alloy pneumoperitoneum-free cage frame is hemispherical, and the upper through hole (602) not inserted with the deformation tube (1) is plugged with a plug (9) for sealing.

8. The memory alloy pneumoperitoneum-free device according to claim 4, characterized in that: A one-way valve is provided at the end of the deformation tube (1). The deformation tube (1) is inserted into the central through hole (601), the upper through hole (602) and part of the lower through hole (603) to form a memory alloy pneumoperitoneum-free cage frame. The memory alloy pneumoperitoneum-free cage frame is hemispherical or spherical. The lower through hole (603) not inserted with the deformation tube (1) is plugged with a plug (9) for sealing.

9. The memory alloy pneumoperitoneum-free device according to claim 4, characterized in that: The deformation tube (1) is a memory alloy multi-pass deformation tube. Cold water at 0°C is passed into the deformation tube (1) to maintain the straight tube in an undeformed state. Warm water at 37±4°C is passed into the deformation tube (1) to maintain the first deformation state of the bent tube. The radius of the bent tube is 300-1100 mm and the arch height of the bent tube is 100-200 mm. Warm water at 45±2°C is passed into the deformation tube (1) to maintain the second deformation state of the bent tube. The arch height of the bent tube in the second deformation state is higher than the arch height of the bent tube in the first deformation state. The arch height of the bent tube in the second deformation state is 5-6 mm higher.

10. The method for assembling and applying the memory alloy pneumoperitoneum-free device according to any one of claims 1 to 9, characterized in that The steps include: S1. Hole position selection Insert a deformation tube (1) into the connecting through hole (6) of the injection joint (2), and insert the other end of the deformation tube (1) into the corresponding connecting through hole (6) of the discharge joint (3), so as to form a memory alloy pneumoperitoneum-free cage; the density of the tubes and the coverage area of ​​the cage can be adjusted by increasing or decreasing the number of deformation tubes (1); S2, limit card connection The angle of the support and limit frame (7) in the connecting through hole (6) is adjusted, thereby adjusting the triangular opening direction of the support and limit frame (7), so that the deformation tube (1) is bent and arched along the triangular opening direction of the frame; S3, multi-range deformation adjustment When expanding, 37±4°C warm water is passed into the deformable tube (1) to maintain the first deformed state of the bent tube, and 45±2°C warm water is passed into the deformable tube (1) to maintain the second deformed state of the bent tube; when contracting, 0°C cold water is passed into the deformable tube (1) to shrink to a straight tube in an undeformed state; S4, fast recycling In the second deformation state, liquid nitrogen is introduced into the deformation tube (1) to shrink the tube to a straight tube in a non-deformed state.

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