2016 Volume 54Annual Issue 28PM-Abstract Pages S406
Providing side holes in the indwelling needle is an effective means for increasing the actual blood flow rate without changing the diameter of the indwelling needle. Reports have indicated, however, that when side holes are provided, resistance actually increases during blood removal, and discussion of the number and shapes of side holes, as well as the locations at which side holes are provided, has remained inadequate. Given this situation, we are seeking theoretical optimization of side holes using computational fluid dynamics (CFD) analysis.We performed CFD analysis on the models in which the number of side holes had been increased from one to three, using the pressure loss coefficient. The results showed that the blood removal flow rate obtained from the CFD analysis conducted on indwelling needles with side holes was largely consistent with the actual blood flow rate obtained from the experiment.
