Unilimb respiratory conduit

A unilimb respiration device respiratory or ventilator conduit comprising a tube having a proximal end and a distal end,   the tube being operatively connectable at the proximal end to a first respiratory port providing inspiratory gas and to a second respiratory port for exhausting expiratory gas, and having the distal end directed towards the patient in use, the entire length of the tube providing a chamber having a predetermined dead space for mixing inspiratory and expiratory gases, said dead space being between 40 cubic centimetres and 1000 cubic centimetres, or the tube having a diameter between 11 millimeters and 28 millimeters and a length between 5 centimeters and 1.5 meters.