formed at the leading end of the catheter application_number US 28203694 A description fig1 illustrates a first embodiment of a fully collapsible venous infusion catheter apparatus for providing an infusion passage into a vein in accordance with the teachings of the present invention while the preferred embodiment of the present invention described herein is placed in a vein the present invention is not intended to be limited to use with veins but should be understood to extend to any blood vessel the collapsible catheter is designated generally by reference numeral 20 within fig1 and includes a leading open end 22 and an opposing trailing end 24 leading end 22 provides an exit port through which fluid received at trailing end 24 can be introduced into a vein of a patient trailing end 24 terminates in a conventional rigid plastic body 26 having a knurled collar or hub 28 to facilitate handling a conventional luer lock connector fitting 30 is provided at the end of body 26 for connection to syringes infusion lines and the like for receiving fluid to be passed through catheter 20 to exit port 22 referring to fig3 a and 3b the collapsible portion of catheter 20 includes a first elongated generally flattened strip 32 of flexible material having first and second opposing sides 34 and 36 first strip 32 extends the length of catheter 20 from trailing end 24 to leading end 22 the collapsible portion of catheter 20 also includes a second elongated generally flattened strip 38 of flexible material having first and second opposing sides 40 and 42 and like first strip 32 extends the length of catheter 20 from trailing end 24 to leading.