the area of guidewire 530 where the walled section of the hollow tube is removed in floppy section 542 the cross section 554 shows that the outer diameter has been further reduced from that of cross section 552 and that the majority of the walled section of the hollow tube of the guidewire has been completely removed thereby creating a single prong in second transition section 540 the cross section 556 shows that the outer diameter now remains constant as the outer diameter of this cross section is substantially similar to the outer diameter as shown in cross section 554 this cross section also show that only a minority of the walled section of the hollow tube of the guidewire has been completely removed as this represents the end of the area of guidewire 530 where the walled section of the hollow tube is removed in sensor housing section 538 the cross section 558 shows that the outer diameter is still constant as the outer diameter of this cross section is substantially similar to the outer diameter as shown in cross sections 556 and 554 also this cross section shows that the hollow tube is completed as in cross section 550 reference is now.