| abstract |
The invention relates to a system (1) for assisting pulmonary gas exchange in patients (2) and for coupling to a ventilation system (47). The system provides end-expiratory extraction and end-inspiratory return of the extracted gas. According to the invention, to adjust the temperature of the gas, a flexible tube (5) is enclosed by an outer tube (200), and a heating tube (213) for conducting a liquid or gaseous medium is also arranged inside the outer tube (200) such that the medium can be conducted through the heating tube (213) in a first direction and at least partially outside the heating tube (213) and inside the outer tube (200) in an opposing, second direction. |