Figure 3.

Ventrain is a hand-held emergency device for ventilation through small tubes, like the Tritube or in extreme situations through the work channel of a bronchoscope. The technique is based on the Venturi principle and allows an active expiration. The upper part of the figure shows the closed device with a simple description how to use the Ventrain. The lower part shows the inside of the device and the flow direction. Leaving opening 3 and 5 open results in no flow from or to the patient (A), closing opening 3 leads to flow direction to the patient (B), while closure of the opening 5 results in expiration (C).