Quantified adhesion of hydrogel particles at a wall shear rate of (A) 200 s−1, (B) 500 s−1, and (C) 1,000 s−1 by modulus after 5 mins of laminar blood flow over an IL-1β activated HUVEC monolayer at 1 × 108 particles/mL. N=3–6 human blood donors per particle condition. Statistical analysis of adherent density was performed using one-way ANOVA with Fisher’s LSD test between all particle adhesion conditions. (*) Represent comparison to PS where (*) indicates p<0.05, (**) indicates p<0.01, and (***) indicates p<0.001. There were no significant differences amongst hydrogel particle types A–D within any wall shear rate. Error bars represent standard error.