Answer: Great question. You absolutely can have an asthma patient who is tiring out, and you could be giving
salbutamol via MDI (8 adult sprays), who worsens and now requires BVM ventilation.
As you begin ventilating the patient, your partner can prepare the epinephrine 1:1000, perform an independent double check and administer the 60 Kg patient an IM injection of 0.5 mg epinephrine.
While ventilating with BVM, you can continue to administer salbutamol via MDI adapter (if available) on the BVM.
If, let’s say, in 5 minutes the patient improves and no longer requires BVM ventilation but is still wheezy, go ahead and consider another dose of MDI (8 adult sprays is given) salbutamol provided the maximum number of doses hasn’t been reached.