In use, the catheter is positioned so that the atherectomy assembly lies within {HEAD ~ a region} of {TAIL ~ interest}, the filtration apparatus is deployed downstream of the region of interest, the plaque is trapped and held by a snare, vacuum, or other trapping means, and then the excising mechanism is activated to remove the plaque 
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In use , the catheter is positioned so that the atherectomy assembly lies within { HEAD ~ a region } of { TAIL ~ interest } , the filtration apparatus is deployed downstream of the region of interest , the plaque is trapped and held by a snare , vacuum , or other trapping means , and then the excising mechanism is activated to remove the plaque
OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH