Degradable split-type without peg blocking device

Abstract

The application relates to a degradable split-type plug device without a template, which comprises a net body weaving unit, a net body shaping unit and a net body plugging and conveying unit. The net body weaving unit is used for weaving the net body; the net body shaping unit is used for shaping the woven net body; and the net body plugging and conveying unit is used for conveying the shaped net body to the opening of the defect site for plugging and positioning the net body. The application has the advantages that the distance of the waist part can be adjusted according to the structure of the oval foramen, the universal performance is greatly improved, the weaving and shaping of the net body are realized in a semi-automatic mode, the pitch control is accurate, the tool reuse rate is high, and the production efficiency and product qualification rate are greatly improved.

Description

Technical Field

[0001] The invention relates to a degradable split-type mortise-free occluding device, which relates to occluding in the field of heart. Background Art

[0002] 1. The foramen ovale is a passage between the fetal atria, located in the middle and lower part of the atrial septum. It is a "valve-like" structure formed by the lower edge of the secundum septum and the primum septum. During pregnancy, oxygenated placental blood can reach the fetal arterial circulation through this structure, which is an important physiological passage. After birth, as the left atrial pressure increases, the foramen ovale functionally closes.

[0003] If the foramen ovale remains open after 3 years of age, it is called patent foramen ovale (PFO). The incidence of PFO in adults is approximately 25%.

[0004] 2. With advances in science and technology, particularly the development of catheter technology, transcatheter interventional occluders have become an important minimally invasive treatment for congenital heart disease, including patent foramen ovale, atrial septal defect, ventricular septal defect, and patent ductus arteriosus. Existing patent foramen ovale occluders consist of a double-disc occluding surface and a narrow waist perpendicularly connected to the double-disc occluding surface. The waist squeezes and deforms the septum primum and septum secundum, and the double-disc occluding surface clamps and secures the deformed defect to block blood flow.

[0005] 3. Existing patent foramen ovale occluders are only suitable for treating PFOs with a short overlap between the primary and secondary septa. They are less effective for PFOs with a longer overlap, and are prone to significant residual shunt after treatment, which can easily induce thrombosis. Furthermore, the distance between the two discs of conventional occluders is fixed, making it impossible to adjust the waist distance to adapt to the anatomy of the foramen ovale.

[0006] At the same time, most of the existing degradable foramen ovale occluders have a mortise structure, and the mortise is longer than the mesh body during the degradation process, which makes it easy to fall off and form thrombus. Summary of the Invention

[0007] In order to overcome the defects of the prior art, the present invention provides a degradable split type mortise-free plugging device. The technical solution of the present invention is:

[0008] A degradable, split, mortise-free occlusion device comprises a mesh weaving unit, a mesh shaping unit, and a mesh occlusion transport unit. The mesh weaving unit is used for weaving the mesh; the mesh shaping unit is used for shaping the woven mesh; and the mesh occlusion transport unit is used for transporting the shaped mesh to the opening of the occlusion defect and completing the positioning of the mesh.

[0009] The mesh blocking and conveying unit includes an upper mesh body, a lower mesh body, an elastic telescopic tube and a conveyor. The upper mesh body and the lower mesh body are arranged opposite to each other, and the elastic telescopic tube is arranged between the upper mesh body and the lower mesh body. The upper mesh body, the elastic telescopic tube and the lower mesh body are connected together by a tightening line. The conveyor is used to deliver the upper mesh body, the elastic telescopic tube and the lower mesh body to the defect site, and after tightening the upper mesh body and the lower mesh body, tie a knot and withdraw them; the tightening line is an absorbable biocompatible suture line.

[0010] The conveyor includes a fastener, a conveying cable and a sheath. One end of the fastener is threadedly connected to one end of the conveying cable, and the other end of the conveying cable is detachably connected to the sheath. A through hole is also provided on the fastener for the tightening wire to pass through.

[0011] In the retracted state, the upper net body, the elastic telescopic tube and the lower net body all enter the defect site through the delivery cable and the sheath tube.

[0012] The upper net body and the lower net body are both arranged in a disc shape.

[0013] The mesh weaving unit includes a movable block, a hook, a spring, a fixed block and a core rod, the connecting rod portion of the fixed block extends to the interior of the movable block and is coaxially arranged with the movable block; the head of the screw is located in the screw mounting hole of the movable block, and the screw portion of the screw is threadedly connected to the connecting rod portion of the fixed block; a spring is sleeved on the periphery of the connecting rod portion, one end of the spring is pressed against the fixed block, and the other end is pressed against the movable block; the core rod is sleeved on the periphery of the fixed block and the movable block, one end of the core rod is arranged adjacent to the step groove of the fixed block, and the other end is movably matched with the step groove of the movable block as the movable block moves; hooks are provided on both the fixed block and the movable block, and the periphery of the core rod is covered with wire grooves.

[0014] The shaping jig includes a shaping shell, an upper cover and a lower cover. The upper part of the shaping shell is detachably mounted with the upper cover, and the lower part is detachably mounted with the lower cover. A shaping cavity for accommodating the mesh is formed inside the shaping shell. Both the upper cover and the lower cover are provided with snap buckles, and the shaping shell is provided with a slot that cooperates with the snap buckle.

[0015] The specific delivery steps of the mesh blocking and delivery unit are as follows:

[0016] (1) The tightening wire passes through the upper mesh body in an N-shaped arrangement. The two ends of the tightening wire pass through the through holes on the fastener. The fastener is assembled and tightened with the threaded end of the transmission cable. After the tightening wire is arranged, the mesh body is sent into the defective part through the sheath tube. After the position is adjusted, the transmission cable is withdrawn.

[0017] (2) The tightening wire left outside the body is passed through the elastic telescopic tube and then placed into the sheath tube. The delivery cable is sent through the sheath tube into the hole of the defect site. The upper mesh body and the elastic telescopic tube are pulled in with the tightening wire, and the delivery cable is withdrawn;

[0018] (3) Pass the tightening wire left outside the body through the lower mesh body, then through the through hole on the fastener into the sheath, push the delivery cable to the defect site, adjust the position of the upper mesh body, elastic telescopic tube and lower mesh body, tighten and fix, and withdraw the delivery cable;

[0019] (4) Insert the tightening wire into the corresponding position of the knotter, adjust and tighten it, and remove the excess tightening wire and fasteners after tying the knot.

[0020] The advantages of the present invention are: the distance of the waist can be adjusted according to the structure of the oval foramen, which greatly improves the universal performance; at the same time, the weaving and shaping of the mesh are semi-automated, the pitch control is precise, and the reuse rate of the jig is high, which greatly improves the production efficiency and product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the mesh weaving unit of the present invention.

[0022] Figure 2 yes Figure 1 sectional view of .

[0023] Figure 3 yes Figure 1 Schematic diagram of the mesh weaving process.

[0024] Figure 4 It is a structural schematic diagram of the mesh shaping unit of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the mesh blocking and conveying unit of the present invention.

[0026] Figure 6 yes Figure 5 sectional view of .

[0027] Figure 7 yes Figure 5 Schematic diagram of the connection relationship between the fastener and the tightening wire.

[0028] Figure 8 yes Figure 5 Schematic diagram of working status.

[0029] Figure 9 yes Figure 5 Schematic diagram of the structure of the middle blocking part.

[0030] Figure 10 yes Figure 5 A top view of the upper or lower mesh.

[0031] Figure 11 yes Figure 1 Schematic diagram of the explosion structure.

[0032] Figure 12 yes Figure 4 Schematic diagram of the explosion structure. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer as the description proceeds. However, these embodiments are merely exemplary and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solutions of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, and such modifications and replacements fall within the scope of protection of the present invention.

[0034] See also Figures 1 to 12 The present invention relates to a degradable split mortise-free occluding device, comprising a mesh weaving unit, a mesh shaping unit and a mesh occluding and conveying unit. The mesh weaving unit is used for weaving the mesh; the mesh shaping unit is used for shaping the woven mesh; the mesh occluding and conveying unit is used for conveying the shaped mesh to the opening of the occluding defect and completing the positioning of the mesh.

[0035] The mesh blocking and conveying unit includes an upper mesh body 601, a lower mesh body 603, an elastic telescopic tube 602 and a conveyor. The upper mesh body 601 and the lower mesh body 603 are arranged relative to each other, and the elastic telescopic tube 602 is arranged between the upper mesh body 601 and the lower mesh body 603. The upper mesh body 601, the elastic telescopic tube 602 and the lower mesh body 603 are connected together by a tightening line 607. The conveyor is used to deliver the upper mesh body 601, the elastic telescopic tube 602 and the lower mesh body 603 to the defect site, and tie a knot after tightening the upper mesh body 601 and the lower mesh body 603 and withdrawing them; the tightening line 607 is an absorbable biocompatible suture line.

[0036] The conveyor includes a fastener 604, a conveying cable 605 and a sheath 606. One end of the fastener 604 is threadedly connected to one end of the conveying cable 605, and the other end of the conveying cable 605 is connected to the sheath 606. The other end of the fastener 604 is close to the lower net body 603, and a through hole is also provided on the fastener 604 for the tightening line to pass through.

[0037] In the retracted state, the upper net body 601 and the lower net body 603 enter the defective part through the delivery cable 605 and the sheath 606; the elastic telescopic tube 602 is delivered into the defective part hole through the sheath 606.

[0038] The upper net body 601 and the lower net body 603 are both disc-shaped.

[0039] The mesh weaving unit includes a movable block 101, a hook 102, a spring 103, a fixed block 104 and a core rod 105. The connecting rod portion of the fixed block 104 extends to the interior of the movable block 101 and is coaxially arranged with the movable block 101; the head of the screw is located in the screw mounting hole of the movable block, and the screw portion of the screw is threadedly connected to the connecting rod portion of the fixed block 104; a spring 103 is sleeved on the periphery of the connecting rod portion, one end of the spring 103 is pressed against the fixed block 104, and the other end is pressed against the movable block 101; the core rod is sleeved on the periphery of the fixed block 104 and the movable block 101, one end of the core rod 105 is arranged adjacent to the step groove of the fixed block 104, and the other end is movably matched with the step groove of the movable block as the movable block 101 moves; hooks 102 are provided on both the fixed block 104 and the movable block 101, and the periphery of the core rod 105 is covered with wire grooves.

[0040] The shaping jig includes a shaping shell 502, an upper cover 501 and a lower cover 502. The upper part of the shaping shell 502 is detachably installed with the upper cover 501, and the lower part is detachably installed with the lower cover 503. The interior of the shaping shell 502 forms a shaping cavity for accommodating the mesh body; the upper cover 501 and the lower cover 503 are both provided with buckles, and the shaping shell 502 is provided with a slot that cooperates with the buckle.

[0041] The working principle of the present invention is:

[0042] The working principle of the mesh weaving unit is: manually weave along the predetermined direction of two hooks with the braiding wire, and the braiding wire is implanted in the corresponding wire groove. When the weaving is completed, press the movable block, the hook on the movable block moves down, and the mortise-free mesh is detached from the hook. The mortise-free mesh can be taken out, and the weaving is completed. Use suture thread to sew and knot the open end of the woven mesh.

[0043] The working principle of the mesh shaping unit is: the sutured mortise-free mesh is placed into a shaping jig (the mortise-free mesh at both ends of the suture is placed into the shaping cavity, and the upper cover 501 and the lower cover 502 are rotated respectively to clamp the mortise-free mesh), and then placed in a vacuum heating furnace for vacuum environment: 0.3Mpa, temperature 90-200℃, time 20-60 minutes, and naturally cooled for 2-4 hours to obtain the mesh (upper mesh and lower mesh).

[0044] The specific delivery steps of the mesh blocking and delivery unit are as follows:

[0045] (1) The tightening wire 607 is passed through the upper mesh body in an N-shaped arrangement. The two ends of the tightening wire pass through the through holes on the fastener 604. The fastener 604 is assembled and tightened with the threaded end of the transmission cable 605. After the tightening wire is arranged, the mesh body is sent into the defective part through the sheath 606. After the position is adjusted, the transmission cable is withdrawn.

[0046] (2) The tightening wire 607 left outside the body is passed through the elastic telescopic tube 602 and then placed into the sheath tube 606. The delivery cable 605 is sent through the sheath tube 606 into the hole of the defect. The upper mesh body 601 and the elastic telescopic tube 602 are pulled in with the tightening wire 607, and the delivery cable 605 is withdrawn.

[0047] (3) Pass the tightening wire 607 left outside the body through the lower mesh body 603, and then through the through hole on the fastener 604 into the sheath 606, push the delivery cable to the defect site, adjust the position of the upper mesh body 601, the elastic telescopic tube 602 and the lower mesh body 603, tighten and fix them, and withdraw the delivery cable 605;

[0048] (4) Insert the tightening line 607 into the corresponding position of the knotter, adjust and tighten it, and remove the excess tightening line 607 and fastener 604 together after tying the knot.

[0049] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A degradable split mortise-free plugging device, characterized in that: The device comprises a mesh weaving unit, a mesh shaping unit and a mesh blocking and transporting unit. The mesh weaving unit is used to weave the mesh; the mesh shaping unit is used to shape the woven mesh; the mesh blocking and transporting unit is used to transport the shaped mesh to the opening of the blocking defect and complete the positioning of the mesh. The mesh occlusion and delivery unit includes an upper mesh, a lower mesh, an elastic telescopic tube, and a delivery device. The upper mesh and the lower mesh are arranged opposite to each other, and the elastic telescopic tube is arranged between the upper mesh and the lower mesh. The upper mesh, the elastic telescopic tube, and the lower mesh are connected together by a tightening line. The delivery device is used to deliver the upper mesh, the elastic telescopic tube, and the lower mesh to the defect site, and then tie a knot and withdraw the mesh after tightening the upper mesh and the lower mesh. The tightening line is an absorbable biocompatible suture. The conveyor includes a fastener, a conveying cable and a sheath tube. One end of the fastener is threadedly connected to one end of the conveying cable, and the other end of the fastener is tightly attached to the lower net body. The other end of the conveying cable is detachably connected to the sheath tube. The fastener is also provided with a through hole for the tightening wire to pass through. The mesh weaving unit includes a movable block, a hook, a spring, a fixed block and a core rod, the connecting rod portion of the fixed block extends to the interior of the movable block and is coaxially arranged with the movable block; the head of the screw is located in the screw mounting hole of the movable block, and the screw portion of the screw is threadedly connected to the connecting rod portion of the fixed block; a spring is sleeved on the periphery of the connecting rod portion, one end of the spring is pressed against the fixed block, and the other end is pressed against the movable block; the core rod is sleeved on the periphery of the fixed block and the movable block, one end of the core rod is arranged adjacent to the step groove of the fixed block, and the other end is movably matched with the step groove of the movable block as the movable block moves; hooks are provided on the fixed block and the movable block, and the periphery of the core rod is covered with wire grooves; the upper mesh body and the lower mesh body are both disc-shaped.

2. The degradable split-type mortise-free plugging device according to claim 1, characterized in that: In the retracted state, the upper net body, the elastic telescopic tube and the lower net body all enter the defect site through the delivery cable and the sheath tube.

3. The degradable split-type mortise-free plugging device according to claim 2, characterized in that: The shaping jig includes a shaping shell, an upper cover and a lower cover. The upper part of the shaping shell is detachably mounted with the upper cover, and the lower part is detachably mounted with the lower cover. A shaping cavity for accommodating the mesh is formed inside the shaping shell. Both the upper cover and the lower cover are provided with snap buckles, and the shaping shell is provided with a slot that cooperates with the snap buckle.

4. The degradable split-type mortise-free plugging device according to claim 1, characterized in that: The specific delivery steps of the mesh blocking and delivery unit are as follows: (1) The tightening wire passes through the upper mesh body in an N-shaped arrangement. The two ends of the tightening wire pass through the through holes on the fastener. The fastener is assembled and tightened with the threaded end of the transmission cable. After the tightening wire is arranged, the mesh body is sent into the defective part through the sheath tube. After the position is adjusted, the transmission cable is withdrawn. (2) The tightening wire left outside the body is passed through the elastic telescopic tube and then placed into the sheath tube. The delivery cable is sent through the sheath tube into the hole of the defect site. The upper mesh body and the elastic telescopic tube are pulled in with the tightening wire, and the delivery cable is withdrawn; (3) Pass the tightening wire left outside the body through the lower mesh body, then through the through hole on the fastener into the sheath, push the delivery cable to the defect site, adjust the position of the upper mesh body, elastic telescopic tube and lower mesh body, tighten and fix, and withdraw the delivery cable; (4) Insert the tightening wire into the corresponding position of the knotter, adjust and tighten it, and remove the excess tightening wire and fasteners after tying the knot.

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