Porta hepatis blocking device

Abstract

The invention discloses a porta hepatis blocking device, and particularly relates to the field of medical instruments, the porta hepatis blocking device comprises a porta hepatis operation blocking belt, two groups of connecting cavity tubes are symmetrically connected to the outer wall of the porta hepatis operation blocking belt, a protective ring is wound on the outer wall of the porta hepatis operation blocking belt, and the two ends of the protective ring are fixedly connected to the two groups of connecting cavity tubes; one end of the porta hepatis operation blocking belt is fixedly connected with a plurality of groups of anti-separation blocks, the other end of the porta hepatis operation blocking belt is provided with an auxiliary opening, a limiting guide pad is embedded in the auxiliary opening, a middle wrapping layer is arranged in the outer wrapping layer in a flexible bonding manner, and an inner wrapping layer is arranged in the middle wrapping layer in a flexible bonding manner; and through the design of a multi-layer composite material, the flexibility, the wear resistance and the biocompatibility are ensured. The design of the drop-shaped protrusions provides an anti-skid effect, and the granular protrusions of the insert enhance the fixity. The whole structure improves stability and safety in an operation, and has the advantages of being easy to operate and high in durability.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly to a hepatic portal blocking device. Background Art

[0002] Portal blocking technology is an important surgical method in liver surgery, which is usually used to control liver bleeding and flow in the portal blood vessels to ensure the safety of the operation. In liver surgery, especially during liver resection or liver transplantation, blood flow control in the portal area is crucial. Blocking the portal blood vessels can prevent excessive bleeding during surgery and improve the success rate of the operation. However, most of the existing portal blocking devices use a single structure and material, which has certain limitations and is difficult to adapt to complex surgical environments and different patient needs.

[0003] Traditional portal blocking devices are usually made of a single layer of material with a relatively simple structure, which can easily cause damage to the blood vessels and surrounding tissues in the portal area during the blocking process. Due to the fragility of the portal blood vessels and tissues, if the blocking band is over-pressed or has too much friction with the tissue surface, it may cause damage to the portal blood vessels and the hepatoduodenal ligament, leading to postoperative complications. In addition, existing blocking devices are often difficult to effectively maintain stability during operation. Especially in complex liver surgeries, displacement of the blocking band often occurs, resulting in incomplete or loose blood vessel blocking, which brings additional risks to the operation.

[0004] Common blocking devices in the prior art are often not precise enough in adjusting the blocking force, lack flexibility during use, and cannot adapt to the complex needs of different surgeries. At the same time, some blocking devices are prone to wear and aging during repeated use due to unreasonable structural design, resulting in a short service life. In particular, the material problem of the blocking belt not only affects the blocking effect, but may also aggravate the damage to the surgical wound due to excessive friction. These problems seriously affect the safety and effectiveness of the operation and increase the difficulty and risk of the operation.

[0005] In addition, with the development of modern medical technology, surgical operations have increasingly stringent requirements for surgical instruments, requiring not only that the instruments provide stable and effective operational support, but also that the instruments have good safety, durability and adaptability. In order to solve the above problems existing in the prior art, it is particularly urgent to develop a portal occlusion device with a more sophisticated structure, softer materials and multi-layer protection. This device should have good flexibility and elasticity, be able to be adjusted according to surgical needs, and maintain its shape and function stability during multiple uses to avoid unnecessary damage to blood vessels and portal tissues.

[0006] Therefore, in view of the shortcomings of the existing portal occlusion device during surgery, the present invention proposes an improved portal occlusion device, which aims to provide a more effective, stable and safe blocking solution through the application of multi-layer structure and new materials, so as to ensure the success of the surgical operation and the postoperative recovery of the patient. At the same time, the device is optimized in terms of service life, friction and ease of operation, adapts to the needs of complex surgery, reduces surgical risks and improves medical effects. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a portal occlusion device, which ensures flexibility, wear resistance and biocompatibility through a multi-layer composite material design. The teardrop-shaped protrusion design provides an anti-slip effect, and the granular protrusions of the insert enhance the fixation. The overall structure improves the stability and safety during surgery, and has the advantages of simple operation and strong durability.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hilar surgery blocking device, comprising a hilar surgery blocking belt, the outer wall of the hilar surgery blocking belt is symmetrically connected with two groups of connecting lumens, the outer wall of the hilar surgery blocking belt is wrapped with a protective ring, both ends of the protective ring are fixedly connected to the two groups of connecting lumens, one end of the hilar surgery blocking belt is fixedly connected with a group of anti-detachment blocks, the other end of the hilar surgery blocking belt is provided with an auxiliary opening, a limited guide pad is inserted inside the auxiliary opening, the hilar surgery blocking belt is flexibly bonded with an outer wrapping layer inside, the outer wrapping layer is flexibly bonded with a middle wrapping layer inside, and the middle wrapping layer is flexibly bonded with an inner wrapping layer inside.

[0009] In a preferred embodiment, the guard ring is arranged at the curved part of the portal surgical blocking band, the guard ring is made of polytetrafluoroethylene material, the thickness of the guard ring is set to millimeters, the outer wall of the guard ring is wrapped with a first auxiliary pad, the first auxiliary pad is made of thermoplastic elastomer material, the thickness of the first auxiliary pad is set to millimeters, and the guard ring is fixedly connected to the first auxiliary pad by an adhesive.

[0010] In a preferred embodiment, the anti-detachment block is configured as a plurality of teardrop-shaped protrusions at one end of the portal surgery blocking band, the teardrop-shaped protrusions are arranged equidistantly along the outer surface of the blocking band, the tail of each teardrop-shaped protrusion is arc-shaped, and the head gradually tapers, the height of the protrusion of the anti-detachment block part is 1 mm, the distance between the protrusions is 2 mm, and the teardrop-shaped protrusions are made of polyurethane material.

[0011] In a preferred embodiment, the auxiliary opening and the limiting guide pad are both elliptical in shape, a second auxiliary pad is provided on the outer wall of the limiting guide pad, the second auxiliary pad is arranged in the shape of multiple granular protrusions, and the limiting guide pad is made of thermoplastic elastomer.

[0012] In a preferred embodiment, the outer wrapping layer is made of medical grade silicone material, and the thickness of the outer wrapping layer is set to 0.5 mm.

[0013] In a preferred embodiment, the middle wrapping layer is made of polytetrafluoroethylene material, and the thickness of the middle wrapping layer is set to 0.5 mm.

[0014] In a preferred embodiment, the inner wrapping layer is made of a shape memory alloy material, and the thickness of the inner wrapping layer is set to 0.5 mm.

[0015] Technical effects and advantages of the present invention:

[0016] The portal occlusion device provided by the present invention is designed with multi-layer composite materials and has good flexibility, wear resistance and biocompatibility. The inner layer is made of medical grade silicone, the middle layer is shape memory alloy, and the outer layer is polytetrafluoroethylene material, which ensures that the blocking band can fit closely to the portal tissue during surgery to avoid tissue damage and has elastic recovery ability, effectively improving the durability and stability of the device.

[0017] In addition, the teardrop-shaped protrusion design at one end of the blocking belt increases the friction during operation to prevent sliding and falling off. The insert and the granular protrusion structure on the outer wall further improve the fixation effect and ensure the smoothness of the surgical operation. The entire device has the advantages of simple operation, high stability and strong durability, which can significantly improve the safety and efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structural state of the blocking zone in the hepatic hilar surgery of the present invention.

[0019] Figure 2 For the present invention Figure 1 A magnified view of the structure at A.

[0020] Figure 3 It is a schematic diagram of the structural state of the retaining ring of the present invention.

[0021] Figure 4 For the present invention Figure 3 Enlarged view of the structure at B.

[0022] Figure 5 It is a schematic diagram of the partial cross-sectional plane structural state of the blocking zone of the hepatic hilar surgery of the present invention.

[0023] Figure 6 For the present invention Figure 5 Enlarged view of the structure at location C.

[0024] The accompanying drawings are marked as follows: 1. Hepatic portal surgery blocking band; 2. Connecting cavity tube; 3. Guard ring; 4. First auxiliary pad; 5. Anti-detachment block; 6. Auxiliary opening; 7. Limiting guide pad; 8. Second auxiliary pad; 9. Outer wrapping layer; 10. Middle wrapping layer; 11. Inner wrapping layer. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Refer to the instruction manual Figure 1-6 A portal blocking device comprises a portal surgery blocking belt 1, the outer wall of which is symmetrically connected with two groups of connecting lumens 2, a guard ring 3 is wound around the outer wall of the portal surgery blocking belt 1, both ends of the guard ring 3 are fixedly connected to the two groups of connecting lumens 2, one end of the portal surgery blocking belt 1 is fixedly connected with a plurality of anti-detachment blocks 5, the other end of the portal surgery blocking belt 1 is provided with an auxiliary opening 6, a limited position guide pad 7 is inserted and arranged inside the auxiliary opening 6, an outer wrapping layer 9 is flexibly bonded inside the portal surgery blocking belt 1, a middle wrapping layer 10 is flexibly bonded inside the outer wrapping layer 9, and an inner wrapping layer 11 is flexibly bonded inside the middle wrapping layer 10.

[0027] Through the above structural design, the hepatic portal surgery blocking band 1 provides multi-layer protection, and the two sets of connecting lumens 2 and retaining rings 3 ensure the stability of the blocking band during operation. The overall structural design of the hepatic portal blocking band is intended to improve the blocking effect and reduce the risk of injury during surgery. The connection between the retaining ring 3 and the connecting lumen 2 can provide reliable structural support for hepatic portal surgery. The retaining ring 3 is wrapped around the curved part of the hepatic portal surgery blocking band 1 to further stabilize the shape of the blocking band to cope with the complex posture change requirements during surgery and prevent the displacement of the blocking band due to excessive bending. The auxiliary opening 6 and the limiting guide pad 7 effectively ensure the insertion and fixation of the blocking band, so that it maintains a good fixing effect during surgery and avoids displacement. The limiting guide pad 7 ensures that the blocking band can be smoothly inserted through the reasonably set size, shape and friction enhancement design, and will not loosen due to external force after fixation. At the same time, the limiting guide pad 7 is made of high-quality thermoplastic elastomer material (TPE), so that it can maintain stable shape and performance during multiple surgeries, ensuring its reliability and durability for long-term use.

[0028] The design of the multi-layer structure (outer wrapping layer 9, middle wrapping layer 10, inner wrapping layer 11) can effectively protect the liver portal area and reduce tissue damage during operation. The outer wrapping layer 9, the middle wrapping layer 10 and the inner wrapping layer 11 are all made of high-performance materials, and the layers are fixed to each other through a flexible bonding process to ensure the stability and long-term durability of the overall structure. The outer wrapping layer 9 is made of medical-grade silicone material, which has good biocompatibility and tensile strength. It can provide soft protection for the liver portal during surgery to prevent tissue damage caused by the pressure applied by the blocking band. At the same time, the flexibility of the outer wrapping layer also helps the blocking band to adjust its position more flexibly during surgery. The middle wrapping layer 10 is made of polytetrafluoroethylene (PTFE) material, which has the characteristics of low friction, corrosion resistance and high heat resistance. It can maintain excellent physical properties during long-term operation and plays an important role in reducing friction with tissues. The inner wrapping layer 11 is made of shape memory alloy. The use of this material enables the blocking band to adaptively deform in different surgical environments and temperatures, and automatically return to its original shape after the operation is completed, thereby enhancing the service life of the blocking band, reducing the frequency of adjusting the blocking band, and improving surgical efficiency.

[0029] The retaining ring 3 is arranged at the curved part of the hepatic portal surgery blocking band 1. The retaining ring 3 is made of polytetrafluoroethylene material. The thickness of the retaining ring 3 is set to 2 mm. The outer wall of the retaining ring 3 is wrapped with a first auxiliary pad 4. The first auxiliary pad 4 is made of thermoplastic elastomer material. The thickness of the first auxiliary pad 4 is set to 3 mm. The retaining ring 3 is fixedly connected with the first auxiliary pad 4 by an adhesive. The retaining ring 3 can greatly reduce friction and ensure its chemical stability during the operation by selecting polytetrafluoroethylene (PTFE) material. The PTFE material has an extremely low friction coefficient, which means that the retaining ring 3 can reduce direct contact with blood vessels or other tissues during the operation to avoid tissue wear or damage. The thickness of the retaining ring 3 is 2 mm, which ensures that it still maintains sufficient flexibility while providing support, so that the overall structure of the blocking band can flexibly respond to various stresses during the operation. The first auxiliary pad 4 wrapped around the outer wall is made of thermoplastic elastomer (TPE), has good elasticity and deformation recovery ability, can play a buffering role during the operation, further reduce the friction between the blocking band and the surrounding tissues, and prevent injuries caused by friction during the operation. The first auxiliary pad 4 is 3 mm thick and has sufficient cushioning and durability to withstand long-term pressure and deformation during surgery, ensuring the operational safety and effectiveness of the blocking band.

[0030] The anti-detachment block 5 is set as a plurality of teardrop-shaped protrusions at one end of the hepatic portal surgery blocking belt 1. The teardrop-shaped protrusions are arranged equidistantly along the outer surface of the blocking belt. The tail of each teardrop-shaped protrusion is arc-shaped, and the head gradually tapers. The height of the anti-detachment block 5 is 1 mm, and the distance between the protrusions is 2 mm. The teardrop-shaped protrusions are made of polyurethane material. The anti-detachment block 5 can generate appropriate friction after the blocking belt is inserted through the fine teardrop-shaped design to prevent the blocking belt from sliding or falling off during operation. The arc-shaped tail of the teardrop-shaped protrusion enables it to pass smoothly through the hepatic portal or other blocking positions during insertion, while the gradually tapering head can provide the necessary friction after the insertion is completed, further enhancing the fixing effect of the blocking belt. Polyurethane material is selected because of its high elasticity and wear resistance, which can ensure that the anti-detachment block can still maintain its initial shape after repeated use and provide sufficient anti-slip performance. In addition, the spacing of the anti-detachment block is reasonably set to ensure that each protrusion can play its anti-slip role in the surgical operation, and the operation will not fail due to excessive or too small spacing.

[0031] The auxiliary opening 6 and the limiting guide pad 7 are both elliptical in shape. The outer wall of the limiting guide pad 7 is provided with a second auxiliary pad 8. The second auxiliary pad 8 is provided in the shape of a plurality of granular protrusions. The limiting guide pad 7 is made of thermoplastic elastomer. The design of the auxiliary opening 6 cooperates with the limiting guide pad 7 to effectively avoid the problem of offset or falling off of the blocking belt during the insertion and fixation process. The limiting guide pad 7 provides a stable guiding effect through its elliptical structure, so that the blocking belt can accurately enter and be fixed at the target position during the operation. The second auxiliary pad 8 increases the friction with the blocking belt through the design of a plurality of granular protrusions, further preventing the displacement of the blocking belt due to external force. The limiting guide pad 7 is made of thermoplastic elastomer material, has excellent elasticity and durability, can maintain its physical properties during multiple surgical operations, and ensures its long-term stable performance output.

[0032] The outer wrapping layer 9 is made of medical grade silicone material, and the thickness of the outer wrapping layer 9 is set to 0.5 mm. The outer wrapping layer 9 adopts medical grade silicone material, which can provide good biocompatibility and flexibility, effectively reduce friction with liver tissue, protect the liver hilum area, and avoid damage to tissue during surgery. Medical grade silicone is widely used in the field of medical devices. Its excellent biocompatibility and soft properties can ensure that it will not cause rejection or excessive friction when in contact with fragile tissues such as blood vessels and liver hilum. In addition, the elasticity of the silicone material enables the outer wrapping layer to adapt to the dynamic deformation of the liver hilum area during surgery, providing better fit.

[0033] The middle wrapping layer 10 is made of polytetrafluoroethylene material, and the thickness of the middle wrapping layer 10 is set to 0.5 mm. The middle wrapping layer 10 is made of polytetrafluoroethylene (PTFE) material, which can provide excellent wear resistance and chemical stability for the blocking band, while reducing friction with surrounding tissues and enhancing surgical safety. Due to its extremely low friction coefficient, the PTFE material can effectively reduce the friction between the blocking band and tissue during portal surgery and prevent tissue damage. At the same time, the chemical resistance of the polytetrafluoroethylene material can ensure that it maintains its original physical properties under the high temperature and chemical reagent conditions in the surgical environment without deformation or degradation.

[0034] The inner wrapping layer 11 is made of shape memory alloy material, and the thickness of the inner wrapping layer 11 is set to 0.5 mm. The inner wrapping layer 11 is made of shape memory alloy material, which can automatically restore the initial shape according to the needs during the operation, ensuring that the blocking band maintains a stable shape during use and provides a lasting fixation effect. Shape memory alloy has a strong adaptive ability, can deform according to the external force applied during the surgical operation, and automatically restore the original shape after the external force is removed.

Claims

1. A hepatic portal blocking device, comprising a hepatic portal surgical blocking band (1), characterized in that: The outer wall of the hilar surgery blocking band (1) is symmetrically connected to two groups of connecting lumens (2); a protective ring (3) is wound around the outer wall of the hilar surgery blocking band (1); both ends of the protective ring (3) are fixedly connected to the two groups of connecting lumens (2); one end of the hilar surgery blocking band (1) is fixedly connected to a plurality of anti-detachment blocks (5); the other end of the hilar surgery blocking band (1) is provided with an auxiliary opening (6); a limited position guide pad (7) is inserted and arranged inside the auxiliary opening (6); an outer wrapping layer (9) is flexibly bonded inside the hilar surgery blocking band (1); a middle wrapping layer (10) is flexibly bonded inside the outer wrapping layer (9); an inner wrapping layer (11) is flexibly bonded inside the middle wrapping layer (10).

2. A hepatic portal blocking device according to claim 1, characterized in that: The retaining ring (3) is arranged at the curved part of the hepatic portal surgery blocking band (1), the retaining ring (3) is made of polytetrafluoroethylene material, the thickness of the retaining ring (3) is set to 2 mm, the outer wall of the retaining ring (3) is wrapped with a first auxiliary pad (4), the first auxiliary pad (4) is made of thermoplastic elastomer material, the thickness of the first auxiliary pad (4) is set to 3 mm, and the retaining ring (3) and the first auxiliary pad (4) are fixedly connected by an adhesive.

3. A hepatic portal blocking device according to claim 1, characterized in that: The anti-detachment block (5) is configured as a plurality of teardrop-shaped protrusions at one end of the hepatic portal surgery blocking band (1), the teardrop-shaped protrusions being arranged equidistantly along the outer surface of the blocking band, the tail of each teardrop-shaped protrusion being arc-shaped, and the head gradually becoming thinner, the height of the protrusions of the anti-detachment block (5) is 1 mm, and the distance between the protrusions is 2 mm, and the teardrop-shaped protrusions are made of polyurethane material.

4. A hepatic portal blocking device according to claim 1, characterized in that: The auxiliary opening (6) and the limiting guide pad (7) are both arranged in an elliptical shape. The outer wall of the limiting guide pad (7) is provided with a second auxiliary pad (8). The second auxiliary pad (8) is arranged in the shape of a plurality of granular protrusions. The limiting guide pad (7) is made of a thermoplastic elastomer.

5. A hepatic portal blocking device according to claim 1, characterized in that: The outer wrapping layer (9) is made of medical-grade silicone material, and the thickness of the outer wrapping layer (9) is set to 0.5 mm.

6. A hepatic portal blocking device according to claim 5, characterized in that: The middle wrapping layer (10) is made of polytetrafluoroethylene material, and the thickness of the middle wrapping layer (10) is set to 0.5 mm.

7. A hepatic portal blocking device according to claim 5, characterized in that: The inner wrapping layer (11) is made of a shape memory alloy material, and the thickness of the inner wrapping layer (11) is set to 0.5 mm.

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