Upon expulsion from the catheter, the wire frame structure resiliently or pseudoelastically expands into a flow through rivet comprising a tube with {HEAD ~ expanded heads} at {TAIL ~ either end} 
at
Upon expulsion from the catheter , the wire frame structure resiliently or pseudoelastically expands into a flow through rivet comprising a tube with { HEAD ~ expanded heads } at { TAIL ~ either end }
OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 TAIL