A catheter introducer assembly is disclosed whereby the safety spring clip moves into position to block the needle tip occurs as a direct consequence of the withdrawal of the needle from the catheter bore. The catheter introducer assembly according to the present invention comprises a needle and a needle...http://www.google.co.uk/patents/US20020169418?utm_source=gb-gplus-sharePatent US20020169418 - Safety spring catheter introducer assembly
