Resting Energy Needs in Brain Dead Patients (reSting EneRgy nEeds iN brAin DEad Patients)

"REEs represent 60-70% of the needs for a sedentary person and 50% of physically active people.~For the measurement of REE will be used the metabolic computer (Medical Graphics, Ultima CCM, Minneapolis, USA), which with continuous recording of breath-to-breath volume (Vt), respiratory rate (RR) of ventilation per minute volume (MV) ), of inhaled and exhaled gases (O2 and CO2) has the ability to calculate the values of VO2, VCO2 and with the help of equations the values of REE and RQ.~All patients in the study will be monitored with the metabolic computer. Their measurements will be recorded every day during their stay in the ICU."

"The measurement of flow velocities in the middle cerebral artery will be done with the transcranial Doppler using a low frequency (2 MHz) ultrasound head.~All patients entering the study will be examined with the TCD every day during their stay in the ICU."