Definitions of ektacytometry indices used for assessing RBC deformability
| LORRCA Index | Definition |
| EImax | Maximal deformability at isotonic osmolality |
| Omin | Osmolality at which 50% of RBC lyse, minimum osmolality |
| Ohyper | Hypertonic osmolality at which 50% of EImax is achieved |
| EImin | Elongation index at hypotonic osmolality (Omin) |
| EIhyper | Elongation index (1/2 of EImax) at hypertonic osmolality |
| OEImax | Osmolality at which maximal EI is achieved |
| LORRCA Index | Definition |
| EImax | Maximal deformability at isotonic osmolality |
| Omin | Osmolality at which 50% of RBC lyse, minimum osmolality |
| Ohyper | Hypertonic osmolality at which 50% of EImax is achieved |
| EImin | Elongation index at hypotonic osmolality (Omin) |
| EIhyper | Elongation index (1/2 of EImax) at hypertonic osmolality |
| OEImax | Osmolality at which maximal EI is achieved |