Fig. 4From: Differences in chamber structure contribute to the incidence of venous air trap chamber coagulation during AN69ST-CHF: clinical and in vitro evaluationExperiment 2: visual evaluation of fluid in a venous air trap chamber. In ACH-Σ, we observed a nonuniform motion of fluid winding pulsatilely upward from the bottom of the chamber. In addition, there was no fluidity in the upper layer of the liquid surface, and stagnation occurred. In Prismaflex, the fluid was observed to flow uniformly in a swirling movement through the chamberBack to article page