MEDICAL INSTRUMENT, CATHETER, AND METHOD FOR PRODUCING MEDICAL INSTRUMENT

摘要

A tubular body includes an elongated inner layer that demarcates a main lumen; a wire reinforcing layer that is formed by winding a reinforcing wire around the inner layer; a resinous elongated sub-tube that is arranged so as to extend along a longitudinal direction of the main lumen outside the wire reinforcing layer and demarcates a sub-lumen having a smaller diameter than the main lumen; a resinous outer layer that sheaths the wire reinforcing layer and the sub-tube; and a retaining wire. An operating wire is movably inserted through the sub-lumen, and has a tip connected to a distal portion of the tubular body. An operating part is operated to pull the operating wire to bend the distal portion of the tubular body. The retaining wire is sheathed by the outer layer, and winds together the sub-tube and the wire reinforcing layer. In a medical instrument (catheter), the retaining wire is in contact with a peripheral surface of the sub-tube on both an external diameter side and an outer surface of the wire reinforcing layer.

主权项

1. A medical instrument comprising:
an elongated tubular body which comprises
an elongated inner layer which demarcates a main lumen,a wire reinforcing layer which is formed by winding a reinforcing wire around the inner layer,a resinous elongated sub-tube which is arranged so as to extend along a longitudinal direction of the main lumen outside the wire reinforcing layer and demarcates a sub-lumen having a smaller diameter than the main lumen, anda resinous outer layer which sheaths the wire reinforcing layer and the sub-tube; an operating wire which is movably inserted through the sub-lumen and has a tip connected to a distal portion of the tubular body; and an operating part which is operated to pull the operating wire to bend the distal portion of the tubular body, wherein the tubular body further includes a retaining wire which is sheathed by the outer layer and winds together the sub-tube and the wire reinforcing layer, and wherein the retaining wire is in contact with both a peripheral surface of the sub-tube on an external diameter side and an outer surface of the wire reinforcing layer.