| 摘要 |
The present invention provides an assembly of an intravenous cannula insertion device (21) and an elongate needle protector (1), said protector comprising a slotted tube (2), a needle (10) and a needle hub (19), said needle hub comprising a protrusion (12.33) extending through said slot to allow the needle and needle hub assembly to be slidable within said protector, a cannula hub (21) operatively inter-engagable with said needle hub within said protector, whereby said needle hub and said cannula hub are extensible together from the protector to allow i.v. insertion of a cannula (20), and wherein said assembly includes a retraction prevention means (7) for preventing retraction of the cannula hub (21) after it has been fully extended whereby the cannula hub (21) remains interlocked with the needle hub (19) when fully extended until released from the assembly by a operation of a release means (15.23). The invention provides means whereby an introducer needle (10) must be withdrawn from the cannula hub before the cannula hub can be separated from the needle protector (1). <IMAGE> |
