Medical cylindrical insert

Abstract

A medical tubular insert in which a plurality of structural bodies each configured by arranging a plurality of structural body elements around an axis are connected in the axial direction, the structural body elements having a surrounding portion configured to be surrounded by a yarn formed by bundling a plurality of fibers, the medical tubular insert having a connection portion, the connecting portion axially connects the structural element of the first structural body and the structural element of the second structural body adjacent to the first structural body, and the surrounding portion has a spacer portion in which fibers are separated from each other in a state in which the fibers have an expansion opening in the axial direction of the structural body. The medical cylindrical insert has a covering portion that covers the surrounding portion and the connecting portion with a resin, and the covering portion has elasticity that enables movement of the fibers that narrow the spacer portion when an external force is applied to the structural element and enables the position of the moved fibers to be restored when the external force is released. By using such a configuration, it is possible to provide a medical cylindrical insert which has excellent leakage resistance and is easy to handle.

Description

technical field [0001] The present invention relates to medical tubular implants such as artificial blood vessels. Background technique [0002] Conventionally, an artificial blood vessel (graft) embedded in a human body, which is an example of a medical cylindrical implant, is formed of a synthetic fiber such as polyester with a woven or braided structure. [0003] Braided structures (also known as braids) are formed by making a loop out of threads and winding the next thread around the loop to make successive loops, joining each other. The artificial blood vessel having a braided structure has low blood leakage resistance due to its high porosity. [0004] Therefore, although an artificial blood vessel coated with a polyurethane elastomer on the entire peripheral surface is used, the porosity of the artificial blood vessel is easily damaged by the coating layer formed by the polyurethane elastomer, and the entire peripheral surface is covered with the polyurethane elastom...

AI Technical Summary

Problems solved by technology

Braided artificial blood vessels have low blood leakage resistance due to their high porosity

[0004] Therefore, although an artificial blood vessel coated with a polyurethane elastomer on the entire peripheral surface is used, the porosity of the artificial blood vessel is easily damaged due to the coating layer formed by the polyurethane elastomer, and the entire peripheral surface is covered with the polyurethane elastomer, so It is difficult to selectively pierce the needles through the holes placed between the fibers

Therefore, in the pinhole of the coating layer that occurs when puncturing with a suture needle or a syringe, a hole formed by cutting the edge of the needle tip is likely to occur, and the pinhole is likely to remain.

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