Patent ID: 9700671
Date: 2017-07-11
CPC Classifications: A61M

Claim:
1. A method comprising: positioning an assembled indwelling assembly adjacent a patient, the assembled indwelling assembly comprising: an inner needle having a sharp needlepoint at a distal end; an inner needle hub fixed to a proximal portion of the inner needle; a hollow outer member in which the inner needle is positioned, the hollow outer member possessing a proximal portion; an outer member hub fixed to the proximal portion of the hollow outer member so that the hollow outer member and the outer member hub move together; an advancing member detachably connected to the outer member hub to advance the outer member hub and the hollow outer member by advancing the advancing member; and an elongated housing projecting in a distal direction from the inner needle hub, the elongated housing possessing a distal end positioned distal of the proximal portion of the hollow outer member in an assembled state of the indwelling assembly before use; gripping the elongated housing and moving the indwelling assembly to puncture a blood vessel of the patient with the sharp needlepoint of the inner needle, the gripping of the elongated housing comprising gripping the elongated housing while the outer member hub and the proximal portion of the hollow outer member are positioned in the elongated housing; advancing the hollow outer member in a distal direction relative to the inner needle such that a distal portion of the hollow outer member is inserted to a target position in the blood vessel, the advancing of the hollow outer member in the distal direction relative to the inner needle being performed by advancing the advancing member relative to the housing, the advancing of the hollow outer member being performed after the puncturing of the blood vessel with the sharp needlepoint of the inner needle; moving the inner needle hub in a proximal direction using one hand while holding the advancing member with an other hand to pull-out the inner needle from the hollow outer member and to entirely remove the inner needle from the hollow outer member; and detaching the advancing member from the outer member hub.