Mechanical Properties of RBCs: Membrane Shear Elastic Modulus and Mean Corpuscular Volume for RBCs stored in CPDA-1, AS-1, and SOLX (N = 6). Membrane Shear Elastic Modulus: Red cell membrane SEM based on the relationship pressure and aspiration length for RBCs stored in AS-1, CPDA-1, and SOLX after (A). 14 days, (B). 28 Days, and (C). 42 Days. Mean Corpuscular Volume: Corpuscular volume was measured using the cell aspiration technique for RBCs stored in AS-1, CPDA-1, and SOLX after (D). 14 days, (E). 28 Days, and (F). 42 Days.