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