A 22-year-old female presents to the emergent department 30 minutes after eating at a restaurant. She states that 10 minutes into her meal she developed generalized hives, pruritus, and dyspnea. On physical examination, she appears to have labored breathing, wheezing, and diffuse raised urticaria on her trunk and extremities. Her vital signs are stable except for pulse oximetry of 92% on room air.
Kimdon先生お久しぶり! 小児科的には先生のコメント通りですね、補足するとすれば O2sat 92% in Room air だったら多分Oxygenも同時に開始しているかもしれません。我々のオフイスでも昨年同様なケースで、酸素とエピ、その後に救急車で最寄の病院で観察といった症例があったばかりです。
I guess it's too late but my first reaction would be oxygen too. When I was a resident in a Pediatrics department. My senior resident told me if I didn't know what to do first, say or shout "O2 mask 5 litter." After that, be calm and think again. On winter nights, childern sometimes got febrile convulsion in a waiting room of an ER because of the flu. Everybody got a kind of panic and then I shout it. It really worked. (Of coures, oxygen must not be used for some disease.)
I would say IM epinephrine is the first thing to do. In addition, put a catheter in her vein and start IV NS to maintain circulation, since her blood vessels are dilated due to anaphylaxis. After injecting epinephrine and IV NS, keep monitoring Vitals include saturation. If the condition is not getting better, IM one more dose of epinephrine. It is probably acceptable to give her IV steroid as well. The key is monitoring vitals.
As I explained already above, im epinephrine and ABC assessment are most important in this scenario. What actually must be done first depends completely on the severity of each anaphylactic reaction. Iv NS bolus and iv epinephrine would be given first if the patient were in a profound shock status, but intubation with mechanical ventilation would be done first if the patient were in severe respiratory failure. Anaphylactic reactions do not automatically imply im epinephrine should be given first, but in mild cases, as in this scenario or cases in impending severe anaphylactic reactions, im epinephrine should be given first with no delay.