diff --git a/src/sections/HistoriaClinica.tsx b/src/sections/HistoriaClinica.tsx
index ee4ba0c..b4ed8f3 100644
--- a/src/sections/HistoriaClinica.tsx
+++ b/src/sections/HistoriaClinica.tsx
@@ -1463,6 +1463,7 @@ function SeccionAcidosBase({ ab, patientId, add, update, del }: {
                   <div className="bg-gray-50 p-2 rounded text-center"><p className="text-xs text-gray-500">SatO2</p><p className="font-bold">{a.sato2}%</p></div>
                   {a.lactato && <div className="bg-gray-50 p-2 rounded text-center"><p className="text-xs text-gray-500">Lactato</p><p className="font-bold">{a.lactato}</p></div>}
                   {a.fio2 && <div className="bg-gray-50 p-2 rounded text-center"><p className="text-xs text-gray-500">FiO2</p><p className="font-bold">{a.fio2}</p></div>}
+                  {a.fio2 && a.po2 && <div className="bg-orange-100 p-2 rounded text-center"><p className="text-xs text-orange-600">PaFiO₂</p><p className="font-bold text-orange-700">{Math.round((a.po2 / a.fio2) * 100)}</p></div>}
                 </div>
                 {a.interpretacion && <div className="bg-teal-50 p-3 rounded-lg border border-teal-200"><p className="text-sm font-medium text-teal-800">Interpretación: {a.interpretacion}</p></div>}
               </div>