[Pulsed Brain-Spoerel system a new closed-circle system (author's transl)]

A pump is used to reinsert the expiratory gas of a Bain Spoerel system into the circuit. It delivers a 14 l.min-1 flow. The expiratory gas is drawn across a CO2 absorber and fresh gas flow is reduced to the patient's VO2. The technic cumulates the advantages of the closed system to the Bain Spoerel system: practical design for head surgery, no valve, then less energetic loss by the patient in spontaneous ventilation, convenient gas flow, adapted to the small child, because of small dead space, economy of drugs, ecology: no more pollution ! humidification and warming of inspired gas. A hundred patients have been so anaesthetized in head surgery without any problem.