The Adult Dräger Pulmotor(1907-1965).
The Pulmotor was the first ventilator to be used around the world for resuscitation. It was invented by Johann Henrich Dräger (1847-1917) in 1907 and was improved by his son Bernhard and his engineer Johann Henrich Dräger (1847-1917). First commercialised in 1908, it had an immediate success with emergency services and with the public in general. It allowed automatic artificial ventilation. When a preset pressure was achieved expiration started. Inspiration started again when the airway pressure reached minus 20 centimetres of water. Criticised by certain physiologists, it was nevertheless used up until the 1960s.
The Baby Dräger Pulmotor (1913).
At the request of American obstetricians, Dräger produced a ventilator designed for neonatal resuscitation. After testing in the USA the first results, published in 1913, were promising but few further publications followed. This ventilator is semi – automatic, the inspiration to expiration ratio being set manually.