Magnetic responsive telescopic lymphatic-venous drainage anastomosis bridging device

Abstract

The present invention relates to the technical field of medical devices and discloses a magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device, comprising an outer tube and an inner tube. The gap between the inner wall of the outer tube and the outer wall of the inner tube forms a lumen, and a three-dimensional spiral telescopic structure is provided in the lumen. The three-dimensional spiral telescopic structure is arranged around the outer wall of the inner tube. The three-dimensional spiral telescopic structure comprises absorbable sutures and magnetic wires. The bundles woven into the absorbable sutures and the magnetic wires are intertwined to form a spiral wire. The spiral wire forms a spiral gap in the lumen, and the spiral gap is used to guide lymph fluid to flow toward the vein. Under the control and regulation of the magnetic field, the deformation of the magnetic wire drives the deformation of the absorbable suture and then drives the contraction and expansion deformation of the outer tube and inner tube structures, changing the cross-sectional area in the device so that the spiral gap changes. After the magnetic field control and regulation are completed, the deformed shape can be maintained unchanged for a considerable period of time, thereby achieving the purpose of controlling the flow direction, flow rate and flow of lymph and blood flowing through the device.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device. Background Art

[0002] Lymphatic-venous drainage is a surgical technique that precisely anastomoses lymphatic vessels with veins to improve lymphatic circulation, promote the return of lymph, and drain lymph that has nowhere to go into the veins, allowing the lymph to return smoothly, thereby achieving the purpose of eliminating swelling. In the existing technology, after the lymphatic-venous drainage anastomosis is established, the flow rate and flow of the lymph at the anastomosis site cannot be precisely adjusted, resulting in the inability to accurately control the drainage effect. When lymphatic-venous pressure inversion occurs, there is a lack of means to promptly detect the pressure inversion and effective measures to prevent venous blood from flowing back into the lymph. Therefore, there is an urgent need for an adjustable bridging device for lymphatic-venous drainage anastomosis to effectively solve the problem of regulating the drainage flow rate and flow after the lymphatic-venous drainage anastomosis is established. Summary of the Invention

[0003] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device. In the magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device of the present invention, a bundle of wires woven from absorbable sutures and magnetic wires is intertwined to form a spiral wire. Under the control and regulation of the magnetic field, the magnetic wires deform to drive the absorbable sutures to deform, and then drive the outer tube and inner tube structures to contract and expand, thereby changing the cross-sectional area of the device so that the spiral gap changes. This facilitates the use of an external magnetic field generator to adjust the contraction and expansion of the inner wall lumen of the device in the later stage. After the control and regulation of the magnetic field are completed, the three-dimensional spiral telescopic structure can maintain its deformed shape for a considerable period of time without changing, thereby achieving the purpose of controlling the direction, velocity and flow of lymph and blood flowing through the device.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A venous lymphatic fistula bridging device includes an outer tube and an inner tube. The gap between the inner wall of the outer tube and the outer wall of the inner tube forms a tubular cavity. A support structure is provided in the tubular cavity. The support structure adopts a three-dimensional spiral telescopic structure. The three-dimensional spiral telescopic structure is arranged around the outer wall of the inner tube. The three-dimensional spiral telescopic structure includes absorbable sutures and magnetic wires. The bundles woven into the absorbable sutures and the magnetic wires are intertwined to form a spiral wire. The spiral wire forms a spiral gap in the tubular cavity. The spiral gap is used to guide lymph fluid to flow to the vein; under the control and regulation of the magnetic field, the magnetic wire deformation drives the absorbable suture to deform, and then drives the outer tube and inner tube structures to contract and expand, thereby changing the cross-sectional area inside the device to cause the spiral gap to change, thereby achieving the purpose of regulating the flow of lymph and blood flowing through the device.

[0006] There are multiple absorbable sutures and one magnetic wire.

[0007] The absorbable sutures are provided with three.

[0008] The absorbable suture is made of polycaprolactone, and the magnetic wire is made of medical-grade magnetic alloy material.

[0009] The outer tube and the inner tube are made of polylactic acid glycolic acid material.

[0010] The surfaces of the outer tube, the inner tube and the supporting structure are provided with an anti-coagulation coating.

[0011] The outer diameter of the outer tube is 3-5 mm, and correspondingly, the inner diameter of the inner tube is 1-4 mm.

[0012] The helical angle of the helical line in the initial state is 45°.

[0013] The beneficial effects of the present invention are:

[0014] 1. The magnetically responsive, telescopic lymphatic-venous drainage anastomotic bridging device of the present invention comprises an outer tube and an inner tube, wherein the gap between the inner wall of the outer tube and the outer wall of the inner tube forms a lumen. The three-dimensional spiral telescopic structure comprises an absorbable suture and a magnetic wire. The bundle of wires woven together by the absorbable suture and the magnetic wire is intertwined to form a spiral wire. The spiral wire forms a spiral gap between the lumen and the gap, which is used to guide lymph fluid to flow toward the vein. Since the three-dimensional spiral telescopic structure is composed of absorbable sutures and magnetic wires, under the control and regulation of the magnetic field, the deformation of the magnetic wire drives the deformation of the absorbable suture, which in turn drives the contraction and expansion of the outer and inner tube structures, thereby changing the internal cross-sectional area of the device and causing the spiral gap to change. This facilitates the use of an external magnetic field generator to adjust the contraction and expansion of the inner wall lumen of the device later to achieve the purpose of regulating the flow of lymph and blood through the device. Moreover, since the three-dimensional spiral telescopic structure can maintain its deformed shape for a considerable period of time after the control and regulation of the magnetic field is completed, the purpose of controlling the direction, flow rate, and flow rate of lymph and blood flowing through the device is achieved.

[0015] 2. The materials and structure of the double-layer tubular cavity of the present invention have excellent mechanical properties and can meet the needs of repeated contraction and expansion. The magnetic induction characteristics of the magnetic wire are conducive to the magnetic field response, forming the chemical stability of the tubular cavity structure material, which can ensure long-term safety. In addition, the corrosion resistance and anticoagulant properties of the tubular cavity structure material ensure stability in the lymphatic blood environment.

[0016] 3. The absorbable sutures are provided in multiple pieces, and the braided bundles thereof can reach and maintain a torsional force of 1-2 Newtons and can meet the tensile force requirements of the double-layer lumen structure deformation.

[0017] 4. The spiral angle of the spiral structure in the initial state is 45°, which can meet the shape requirements of the double-layer tubular cavity structure deformation.

[0018] 5. An anticoagulant coating is provided on the surface of the support body to prevent the possibility of thrombosis during the operation of the bridging device.

[0019] 6. The outer diameter of the outer tube is 3-5 mm, and the inner diameter of the inner tube is 1-4 mm. The two ends of the bridging device are connected to the vein end and the lymph end respectively, which can adapt to the lumen size of most lymphatic and venous bridging sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the present invention.

[0022] In the figure, there is an outer tube 1 , an inner tube 2 , a lumen 3 , a support structure 4 , an absorbable suture 41 , and a magnetic wire 42 . DETAILED DESCRIPTION

[0023] In order to facilitate those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] like Figure 1 As shown, a magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device comprises an outer tube 1 and an inner tube 2. The gap between the inner wall of the outer tube and the outer wall of the inner tube forms a lumen 3. A support structure 4 is provided in the lumen. The support structure adopts a three-dimensional spiral telescopic structure. The three-dimensional spiral telescopic structure is arranged around the outer wall of the inner tube. The three-dimensional spiral telescopic structure comprises an absorbable suture 41 and a magnetic wire 42. The bundles woven from the absorbable suture 41 and the magnetic wire 42 are intertwined to form a spiral wire. The spiral wire forms a spiral gap in the lumen gap, and the spiral gap is used to guide lymph fluid to flow to the vein.

[0025] Since the three-dimensional spiral telescopic structure is composed of absorbable sutures 41 and magnetic wires 42, under the control and regulation of the magnetic field, the deformation of the magnetic wires 42 drives the deformation of the absorbable sutures 41, and then drives the contraction and expansion deformation of the outer tube 1 and the inner tube 2 structures, thereby changing the cross-sectional area inside the device and causing the spiral gap to change, so as to achieve the purpose of regulating the flow of lymph and blood flowing through the device. Moreover, since the three-dimensional spiral telescopic structure can maintain the deformed shape for a considerable period of time after the control and regulation of the magnetic field is completed, the purpose of controlling the flow direction, flow rate and flow of lymph and blood flowing through the device is achieved.

[0026] There are multiple absorbable sutures 41 and one magnetic wire 42 .

[0027] There are three absorbable sutures 41. There are multiple absorbable sutures, and the braided bundle can reach and maintain a torsional force of 1-2 Newtons and meet the tensile force requirements of the double-layer tubular cavity structure deformation.

[0028] The absorbable suture is made of polycaprolactone, and the magnetic wire is made of medical-grade magnetic alloy material.

[0029] The outer tube 1 and the inner tube 2 are made of polylactic acid glycolic acid material.

[0030] The outer tube 1, the inner tube 2 and the support structure are provided with an anticoagulant coating on their surfaces. The anticoagulant coating provided on the support structure surface can prevent the possibility of thrombosis during the operation of the bridging device.

[0031] The outer diameter of the outer tube is 3-5 mm, and correspondingly, the inner diameter of the inner tube is 1-4 mm. The two ends of the bridging device are connected to the vein end and the lymph end respectively, and can adapt to the lumen size of most lymphatic and venous bridging sites.

[0032] The helical angle of the helical line in the initial state is 45°. The helical angle of the helical structure in the initial state is 45°, which can meet the shape requirements of the double-layer lumen structure deformation.

[0033] The outer tube 1, inner tube 2, and three-dimensional spiral retractable structure of the present invention have excellent mechanical properties and can reliably meet the needs of repeated contraction and expansion. The magnetic induction characteristics of the magnetic wire are conducive to magnetic field response, can reliably complete the structural deformation action and can maintain the deformed shape for a considerable period of time. The chemical stability of the material of the device of the present invention ensures long-term safety, while the corrosion resistance and anticoagulant properties ensure stability in the blood environment.

[0034] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are intended only to describe the present invention and do not require that the present invention must be constructed or operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense. For example, they can be connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0035] The above description is a preferred embodiment of the present invention, and the description of the specific embodiment is only for a better understanding of the concept of the present invention. For those skilled in the art, according to the principles of the present invention, several improvements or equivalent substitutions can be made, and these improvements or equivalent substitutions are also considered to fall within the scope of protection of the present invention.

Claims

1. A magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device, characterized in that: The device comprises an outer tube and an inner tube, wherein the gap between the inner wall of the outer tube and the outer wall of the inner tube forms a lumen, and a support structure is provided in the lumen, and the support structure adopts a three-dimensional spiral retractable structure, and the three-dimensional spiral retractable structure is arranged around the outer wall of the inner tube, and the three-dimensional spiral retractable structure comprises absorbable sutures and magnetic wires, and the bundles woven into the absorbable sutures and the magnetic wires are intertwined to form a spiral wire, and the spiral wire forms a spiral gap in the lumen gap, and the spiral gap is used to guide lymph fluid to flow to the vein; under the control and regulation of the magnetic field, the deformation of the magnetic wire drives the deformation of the absorbable suture and then drives the contraction and expansion deformation of the outer tube and inner tube structures, thereby changing the cross-sectional area inside the device so that the spiral gap changes, thereby realizing the regulation of the lymph and blood flow flowing through the drainage anastomosis bridging device.

2. The magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device according to claim 1, characterized in that: There are multiple absorbable sutures and one magnetic wire.

3. The magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device according to claim 2, characterized in that: The absorbable sutures are provided with three.

4. The magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device according to claim 1, characterized in that: The absorbable suture is made of polycaprolactone, and the magnetic wire is made of medical-grade magnetic alloy material.

5. The magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device according to claim 1, characterized in that: The outer tube and the inner tube are made of polylactic acid glycolic acid material.

6. The magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device according to claim 1, characterized in that: The surfaces of the outer tube, the inner tube and the supporting structure are provided with an anti-coagulation coating.

7. The magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device according to claim 1, characterized in that: The outer diameter of the outer tube is 3-5 mm, and correspondingly, the inner diameter of the inner tube is 1-4 mm.

8. The magnetically responsive telescopic lymphatic-venous drainage anastomosis bridging device according to claim 1, characterized in that: The helical angle of the helical line in the initial state is 45°.

Images