A nurse draws a blood sample from the arm of an elderly woman,in order to carry out a liver function test. A tourniquet (strap) is used to restrict the flow of blood in the vein. This blood sample will be chemically tested for elec- trolytes and levels of urea. It will help diagnose liver disease,inflammation,and the efficiency of the liver to filter and cleanse the blood of toxic substances | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Young, Hattie |
Taille de l’image : | 3459 px × 2430 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |