- Carrying out a blood sample according to the following conditions: 1 dry tube, 1 EDTA tube and 2 dry tubes for biochemistry The dry tube and the EDTA tube will be immediately put in ice for transport to the storage site. It will then be immediately centrifuged and then frozen at -80 ° C. The two dry tubes for biochemistry will be transmitted to the laboratory of biochemistry of the CHU Gabriel-Montpied.