Device for determining the parameter of blood internal environment consisting of the electrode to scan oxygen partial pressure, electrode to scan carbon dioxide partial pressure, which are connected via a measuring amplifier with the analytic and managing complex to output the memory unit of the patient data base. The analytic and managing complex is connected to the display device, the recording and the additional equipment having to access the Internet. The analytic and managing complex is also connected to the mixing device of respiratory gases with the output the respiratory gases and/or the dosage drug dispenser with the kit of the infusion solutions.Device for determining the parameter of blood internal environment consisting of the electrode to scan oxygen partial pressure, electrode to scan carbon dioxide partial pressure, which are connected via a measuring amplifier with the analytic and managing complex to output the memory unit of the patient data base. The analytic and managing complex is connected to the display device, the recording and the additional equipment having to access the Internet. The analytic and managing complex is also connected to the mixing device of respiratory gases with the output the respiratory gases and/or the dosage drug dispenser with the kit of the infusion solutions.