Acute Carecommon
A medical student is bag-mask ventilating a 62-year-old woman who is apnoeic after a benzodiazepine overdose. She has a palpable pulse and a correctly sized oral airway in place. Worried that she is not getting enough, the student is squeezing the bag briskly and emptying it fully with each breath, about 30 times a minute. The chest rises with every breath and her oxygen saturation is 98%. Which one of the following complications of this technique is most likely to harm her?