However, these devices do not reduce {HEAD ~ the risk} of {TAIL ~ embolization} associated with such procedures; the catheters themselves are likely to dislodge plaque material during positioning, and these devices do not include structures to prevent escape of embolic material 
of
However , these devices do not reduce { HEAD ~ the risk } of { TAIL ~ embolization } associated with such procedures ; the catheters themselves are likely to dislodge plaque material during positioning , and these devices do not include structures to prevent escape of embolic material
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH