realistic medical illustration showing a blood test tube and a graph with rapidly rising and falling curves, representing 'Livelli ematici instabili' and 'Emivita corta'. Include Italian text in the image: 'Livelli ematici instabili', 'Emivita corta', 'Variazioni rapide nel sangue', 'Fluttuazioni concentrazione plasmatica'. Clear and informative style.emoji