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Noncircle systems like the stock Bain system are associated
with a number of drawbacks. These drawbacks include the awkward delivery
of positive pressure ventilation (PPV) including an uncertainty as to the
actual pressures delivered during PPV, and difficulties collecting waste
gases.
Adding a Bain Block (Armstrong Arm) rectifies these concerns. This
~$300 USD investment is money well spent. The Bain system attaches to the
outlet to the left in the picture above.. The reservoir bag is located in
a familiar vertical position with the pop-off just above. A pressure
manometer is included. Adding a pop-off
occlusion valve to the Bain Block completes a convenient and effective
noncircle delivery system.
As a reminder, these are not non-rebreathing systems unless oxygen flow rates are high enough to make them so. Minimum oxygen flow
rates are generally considered to be 200 to 250 ml/kg/min. Low oxygen flow
rates will lead to significant, potentially fatal, rebreathing of exhaled
gases. |
