1. Ventilation through a small-bore catheter: optimizing expiratory ventilation assistance 
A.E.W. Hamaekers, P.A.J. Borg, T Götz, D Enk 
British Journal of Anaesthesia 
Volume 106, Issue 3, Pages (March 2011)
DOI: /bja/aeq364
Copyright © 2011 The Author(s) Terms and Conditions

2. Fig 1
(a) The modified industrial SBP 07 as previously described.15 Silicone oxygen tubing from a pressure-compensated flowmeter is attached to the ejector’s inlet. The silencer has been removed from the outlet to allow closure by a finger for redirecting the flow to the side port. A T-piece with an extra 4 mm side hole at the lateral surface (not visible in this picture) is attached to the side port as a bypass. This side hole functions as an on/off switch to control gas flow through the connecting tubing to the transtracheal catheter. (b) The ventilation ejector DE 5: silicone oxygen tubing from a pressure-compensated flowmeter is connected to the ejector’s inlet (1). Gas flow is directed through a 0.7 mm ID jet needle to the outlet (2). Closure of the outlet (jet/EVA switch) by the finger allows redirection of the flow to the side port (3). The T-piece with the extra 4 mm side hole (4) and the connecting tubing (5) are identical to those of the SBP 07.
British Journal of Anaesthesia  , DOI: ( /bja/aeq364)
Copyright © 2011 The Author(s) Terms and Conditions

3. Fig 2
(a) CT scan of the modified SBP 07. The orientation is the same as in Figure 1a. The scatter is produced by metal parts of the SBP 07. (b) CT scan of the DE 5. The orientation is the same and the numbers refer to identical structures as in Figure 1b. The outflow pipe with the jet/EVA switch (2) and the on/off switch (4) can clearly be identified. The arrow indicates the 0.7 mm ID jet needle.
British Journal of Anaesthesia  , DOI: ( /bja/aeq364)
Copyright © 2011 The Author(s) Terms and Conditions

4. Fig 3
The DE 5 in two functional modes. (a) Jet insufflation: the on/off switch and the jet/EVA switch are closed by the finger. Oxygen flows from the ejector’s inlet (1) to the connecting tubing (5). (b) EVA: only the on/off switch is closed by the finger. Oxygen flows from the ejector’s inlet (1) to the outlet (2) entraining gas from the connecting tubing (5).
British Journal of Anaesthesia  , DOI: ( /bja/aeq364)
Copyright © 2011 The Author(s) Terms and Conditions