| 摘要 |
<p>A retractable catheter introducer structure (10) includes a stepped housing (16) and a retractable needle holder (14). The head (24) of the needle holder (14) is held in a first embodiment by means of a plunger tube (18) having a landed front opening (22), and in a second embodiment wherein the head (24') of the needle holder (14') is possessed of a surrounding ring member (86) which can be pressed upon and released by the open mouth of an elongated tube (84). A catheter needle (12) extends from the front of the housing (16') to which a catheter assembly is removably attached. Both embodiments provide one handed operation. Retraction is triggered by pulling on the housing (16, 16') with the plunger tube (18, 84) backed against the palm of the hand to release the needle holder (14, 14'). Until the introducer structure (10, 80) is separated, the catheter assembly remains attached to the housing (16, 16') after retraction is triggered giving the operator greater control by reducing uncontrolled fluid egress.</p> |
