at 11 p.m., a client is admitted to the emergency department. he has a respiratory rate of 44 breaths/minute. he's anxious, and wheezes are audible. the client is immediately given oxygen by face mask and methylprednisolone (depo-medrol) i.v. at 11:30 p.m., the client's arterial blood oxygen saturation is 86%, and he's still wheezing. the nurse should plan to administer:
