Ask Dr. Z

Dr.Z, Patient came for declot of the stent placement from the distal right subclavian vein to the proximal SVC for dialysis. Fistulogram peformed and there is no stenosis other than the previously placed stent which is occluded. The stent was recanalized using a guidewire combination which was then advanced through the right into the IVC. The occluded stent was then sequentially dilated up to 12 mm. There was dissolution of the thrombus from the distal aspect of the stent but there was residual thrombus in the proximal stent. After failed angioplasty of these residual thrombuses the decision was made to insert a new 12x16 mm stent. My question is since there is no stenosis but only thrombus can we code PTA? Please explain. Thanks