Using the Situation-Background-Assessment-Recommendation (SBAR) Format, in Which Order Should the Nurse

Using the Situation-Background-Assessment-Recommendation (SBAR) format, in which order should the nurse make these statements to communicate a change in patient status to a health care provider?

A) Mr. A was admitted 2 days ago with heart failure and has been receiving furosemide (Lasix) for diuresis, but his urine output has been low.
B) I think that he needs to be evaluated immediately and may need intubation and mechanical ventilation.
C) This is the nurse on the surgical unit. I am calling about Mr. A in room 3. After assessing him, I am very concerned about his shortness of breath.
D) Today, he has crackles audible throughout the posterior chest and his O₂ saturation is 89%. His condition is very unstable.