Two way outdwelling slit valving of {HEAD ~ medical liquid} flow through {TAIL ~ a cannula} and methods 
Two way outdwelling slit valving of { HEAD ~ medical liquid } flow through { TAIL ~ a cannula } and methods
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH