. . "039]FIG. 11 is perspective view of an introducer having a kink. [0040]FIG. 12A is a side view detailing a gripping point of a sensor lead located distal from the sensor. [0041]FIG. 12B is a side view detailing a gripping point of a sensor lead located proximal to the sensor. [0042]FIG. 13 is a perspective view of an insufficiently stiff sensor lead inserted into a vessel. [0043]FIG. 14 is a side v" . .