IV stylet catheter

Claim 1

A catheter insertion apparatus for the subcutaneous insertion of a catheter into a patient, comprising; a) a body member having a forwardly projecting hub and a central opening therein defining a backflow chamber; b) a stylet mounted forwardly on said body having a central opening therethrough with the forward end extending to a point for insertion into a patient and a rearward end connected through said hub in communication with said backflow chamber; c) a catheter member having an adaptor portion for releasable mounting over said hub and a shaft portion for extending axially from said adaptor portion over said stylet and terminating short of said stylet point when the hub portion is so mounted; d) a chamber guard releasably mounted on said body member rearwardly of said backflow chamber for closing the rear end thereof, said chamber guard including a single threader member integral therewith and in a forwardly extending loop, the leading end of which further extends along an outer surface of said body member and said hub to abut the adaptor portion of said catheter member whereby downward finger pressure on said loop causes the leading end to advance and displace the catheter member along a line of axial displacement beyond said stylet point said outer surface including a grooved surface thereon for directing said leading end along said line of axial displacement.