CATHETER ASSEMBLY

摘要

A catheter assembly includes an outer catheter and an inner catheter. The inner catheter has an accommodation unit which can be positioned on a farther distal side than an outer catheter body in a state where an inner catheter body is inserted into the outer catheter body, extends in a proximal direction from the inner catheter body, and can accommodate an outer catheter distal portion so as to surround an outer circumference thereof in a state where the outer catheter distal portion formed at a distal end of the outer catheter body is reduced in diameter. The outer catheter distal portion can be separated from the accommodation unit and can expand in diameter by moving the inner catheter body in a distal end direction relatively with respect to the outer catheter body from a state of being accommodated in the accommodation unit.

主权项

1. A catheter assembly comprising:
an outer catheter comprised of a tubular outer catheter body, the outer catheter body possessing a distal end portion terminating at a distal-most end of the outer catheter body, the distal end portion of the outer catheter body possessing an outer circumferential surface; a shaft comprised of a shaft body insertable into the outer catheter body; the shaft including an accommodation unit extending in a proximal direction from the shaft body, positionable distal of the distal-most end of the outer catheter body in a state where the shaft body is positioned in the outer catheter body, and configured to accommodate the distal end portion of the outer catheter body so that the accommodation unit surrounds the outer circumferential surface of the distal end portion of the outer catheter body and an outer diameter of the distal end portion of the outer catheter body is decreased relative to the outer diameter of the distal end portion of the outer catheter body before the distal end portion of the outer catheter body is accommodated in the accommodation unit; and the distal end portion of the outer catheter body being separable from the accommodation unit by relatively moving the shaft body in a distal end direction with respect to the outer catheter body from the state of being accommodated in the accommodation unit so that the outer diameter of the distal end portion of the outer catheter body expands upon being separated from the accommodation space.