The air cushion on the mask failed to inflate when attempting to ventilate the patient using the adult face mask (#5).Despite multiple adjustments with patient positioning, changing the long valve mask twice and changing of the jackson reese circuit, the bag simply would not inflate indicating a leak somewhere in the circuit.An ambu bag was immediately available and the patient was ventilated without issue.The trough oxygen saturation was 26% and came back up to 99% over two minutes.Upon inspection of the equipment, the mask was deflated and would not inflate with syringe; the air would simply leak out.Thus, we concluded the defective mask was the cause of not being able to obtain a seal.Several more masks of the same brand (a brand we do not regularly use as anesthesiologists; difference is with the long valve inflation mechanism) and had the same issue of not being able to inflate the mask with air.
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