In cold season a patient was delivered to a hospital. He was rescued from drowning in a body of water. There was no contact of his airways with water. The patient is anxious, pale, complains of pain and numbness of limbs, has cold shivering. Breathing rate is 22/min, BP is 120/90 mm Hg, heart rate is 110/min, rectal temperature is 34,5°C. What kind of warming should be prescribed to the patient?