Repair material for conduit of living body

Abstract

Disclosed is a stent-graft (10, 10a, 10b, 20, 30, 30a, 40) which is a repair material for conduits of a living body, such as blood vessels, e.g., aortas, and the tracheas. The stent-graft has a tubular shape formed by weaving a warp (14) formed from a resinous material and a weft (12, 42) including a filament formed from at least one of a shape memory resin, a shape memory alloy, and a superelastic metal. The weft (12, 42), which is woven along the circumferential direction, and / or the warp (14), which is woven along the axial direction, is constituted of either a yarn which is swollen by bodily fluid or a yarn having a coating (16) which is swollen by bodily fluid.

Description

technical field [0001] The present invention relates to a repairing material for a living body lumen, which is formed into a tubular shape by interlacing warp and weft yarns and used for repairing living body lumens such as blood vessels. Background technique [0002] For example, in the process of treating diseases such as aneurysms of the chest and abdomen, surgical operations in which a part of a blood vessel is replaced with an artificial blood vessel are sometimes performed, but this operation method tends to cause great harm to the patient. Therefore, a surgical method is also adopted in which surgical damage to the patient is reduced by retaining the original blood vessel and indwelling a stent graft as a blood vessel repair material in the blood vessel. [0003] A common stent-graft is constructed as follows: on the inner or outer surface of a tube (graft) made of polyester or other resin filaments woven into a cylindrical shape, suturing and fixing the Metal wires ...

AI Technical Summary

Problems solved by technology

[0004] However, when such a stent-graft is inserted into a blood vessel, the diameter of the tube increases in proportion to the thickness of the frame and the thickness of the suture thread of the frame. Therefore, even if the outer diameter of the tube is reduced Sometimes it is difficult to reduce the diameter sufficiently

Therefore, the diameter of the delivery sheath that accommodates the stent-graft and delivers it to the target site must also be increased, and there is a possibility that the surgical injury to the patient cannot be sufficiently reduced.

In addition, in the structure provided with the above-mentioned skeleton, there is a tendency that the force tends to be concentrated locally at the contact portion between the skeleton and the fabric, which may affect the blood vessel wall in contact with the stent-graft, and may cause fabric damage, etc.

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