TKO vs. Locked IVs -- keywords

This is a first stab at a search attempting to compare the stability/etc. of locked IVs to that of TKO IVs. I'm posting it here because it took a long time to get this far and I don't want to have to start over if asked for the same search again in a couple years.

("continuous infusion" OR "constant infusion" OR "keep open" OR "keep-open" ) AND ( lock OR locks OR locked OR locking OR ((occasional OR intermittent OR regular) AND ( flush OR flushes OR flushing)))