Little known volume considerations in irrigation, aspiration

I have measured infusion rates and collection rates for the Cavitron, Site and Storz I-A instruments, and for several needle systems. The Cavitron and Site instruments move large volumes per unit time, while the Storz is a low volume system. Leakage is the major source of total volumes used with the larger needles. Port size and needle bore diameter both have some effect on rapidity of flow through a needle, but needle diameter is more important.