the conduit stiffer and more pushable stylet 52 can be formed of any suitable material for example stainless steel or nitinol stylets are well known to those skilled in the art stylet 52 can be proximally advanced beginning at conduit distal region 51 in some embodiments or distally advanced beginning at conduit proximal region 53 in other embodiments fig5 b illustrates conduit 50 and stylet 52 after tpc 54 has been advanced over stylet 52 and through conduit 50 in some methods tpc 54 is advanced proximally while in other methods tpc 54 is advanced distally through conduit 50 and over stylet 52 tpc 54 includes distal region 56 as previously described and a proximal region 57 tpc 54 can be positioned such that a couple centimeters of length are exposed beyond the distal end of conduit 50 fig5 c illustrates conduit 50 after stylet 52 has been removed leaving tpc 54 in place extending beyond the distal end of conduit 50 tpc may have the proximal end coupled to a controllable blood supply during this procedure the tpc can be primed in some methods by filling the tpc with a liquid prior to use the liquid may be heparinized blood heparinized saline or the like the tpc may have a luer lock connection on the proximal end in such devices the liquid can be injected into the tpc to prime the tpc through the luer lock connection alternatively the liquid could.