Abstract: The invention relates to control of bubble formation in a fluid during extracorporeal circulation. A fluid supply means (111a) is configured to supply fluid to the extracorporeal circuit (111a, 111b, 113, 114, 115, 116), a flow control means (113) is connectable to the extracorporeal circuit and configured to control the flow of the fluid in the circuit; a gas exchange means (114) is connectable to the circuit and configured to gas exchange of the circulated fluid; an antibubble control unit (125) is connectable to an outlet (123) of the gas exchange means and configured to control the total gas pressure over a gas-exchange membrane (118) of the gas exchange means, whereby the amount of gas in the fluid leaving the gas exchange means can be controlled; and fluid return means (115, 116) is connected to the gas exchange means and configured to reintroduce the fluid into the patient.

Abstract: A system (10) for cerebral temperature control of a living being, comprising a double lumen catheter means (30) configured to be introduced through a nostril of a living being and to be placed with its tip at the level of the back of the tongue. The double lumen catheter means (30) comprises a first lumen (32) and a second lumen (38), said first and second lumens are in fluid communication by means of a set of end openings (34), said second lumen being configured as an expandable balloon. Further comprising a temperature regulator (24) connected to a reservoir (20) comprising a fluid (22), said temperature regulator being configured to regulate the temperature of said fluid, and means (12, 14, 16) for circulating said temperature regulated fluid from said reservoir into said first lumen, from said first lumen into said second lumen, and from said second lumen back to said reservoir.