[Presentation of a method of interpreting erythrocyte deformability]

The physical principles of a method based on a haematic double filtration, according to Reid classic technique is explained. The aim is to determine a method for researching the characteristics of erythrocytic deformability, without changing the original medium, exoerythrocytic essential component of the membrane physiochemical quality and intraerythrocytic for the fast, active exchanges, after an evaluation of different techniques and instrumentation. A practical example for calculating the factor of correction, with reference to personal material, is made. This method has the advantage that it does not need the manipulation of the sample and does not delay the determination.