Catheter insertion device and method of inserting a catheter
An insulin infusion system is provided with a manual insertion device having a dual retraction spring ( 230 ) configuration for automatic introducer needle ( 222 ) retraction. A button ( 200 ) of the insertion device is used to insert the introducer needle ( 222 ) and catheter ( 202 ), and once the introducer needle ( 222 ) and catheter ( 202 ) have been fully inserted, a rotating engagement releases the dual retraction springs ( 230 ) such that the introducer needle ( 222 ) automatically retracts, leaving the catheter ( 202 ) in the body of the user. An end of the introducer needle ( 222 ) remains in the inserted catheter ( 202 ) and/or in the septum ( 206 ) of the inserted catheter ( 202 ) to provide an uninterrupted fluid path.
1. A method of making an introducer needle subassembly including an introducer needle having a proximal end and a distal end adapted to be inserted into a patient in an insertion direction and an introducer hub including a first end and a second end with a slot therebetween, wherein the method comprises the steps of:
forming the introducer hub to comprise at least one spring boss extending in the insertion direction radially offset from the distal end of the introducer needle;
inserting the introducer needle having at least one bend therein into the slot of the introducer hub; and
securing the introducer needle in the slot on an upper surface of the introducer hub;
wherein the inserting step comprises inserting the introducer needle by translating the introducer needle into the slot in a single motion without rotation, and the securing step comprises securing the introducer needle in the slot by snapping the introducer needle in place with a snap disposed on the upper surface of the introducer hub.