During the use with inpact pacific, inpact admiral and inpact amphiprion drug eluting balloons, it was reported that a physician indicated he has observed slow / low flow in spite of using vasorelaxants (e.G., nitro, gb23a/amixibab).The situation appeared to be temporary and resolved itself within a reasonable time without re-intervention.The physician reported that it could be related to clearance through the microvasculature and that it was not the vessel itself that spasms or narrows, but an increased impedance on downstream clearance caused either by multiple lateral plaque shifts (exacerbated by the use of multiple short balloons) or by matrix particles.No patient safety concerns were expressed.This was reported as an observation by the physician.The physician reported the observation rate was very low at ~5%.From the perspective of safety, the physician indicated that the phenomenon rapidly and easily resolved in 5m with the use of abciximab, so he felt he had an adequate resolution when this infrequent condition was observed.
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