{HEAD ~ The present invention} relates generally to {TAIL ~ medical liquid flow} in a cannula and more particularly to novel structure and methods for outdwelling selective slit valving of medical liquid flow, including bi direction flow, along a cannula, such as a catheter tube or needle, when the distal end thereof is indwelling in a medical patient 
relates generally to
{ HEAD ~ The present invention } relates generally to { TAIL ~ medical liquid flow } in a cannula and more particularly to novel structure and methods for outdwelling selective slit valving of medical liquid flow , including bi direction flow , along a cannula , such as a catheter tube or needle , when the distal end thereof is indwelling in a medical patient
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