Do you mean extraluminal thombus or intraluminal thrombus?
Our hospital has noticed higher superficial thrombus rates from using the Bard Power PICC. What many of us didn't realize when we started using these "reverse tapered" catheters is that they taper TWO french sizes from tip to hub. This is not a slight taper this is huge. IF you are trimming your PICCs and placing them all the way to the hub, then you are putting a huge catheter in your patient's arm.