The surgical instrument 53, wherein {HEAD ~ the collection chamber} comprises a polymeric material or {TAIL ~ stainless steel} 
comprises
The surgical instrument 53 , wherein { HEAD ~ the collection chamber } comprises a polymeric material or { TAIL ~ stainless steel }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL