Ok here's a tricky one (for the doctors) that I saw a few weeks back.
77year old with 40packyr smoking history. Presents with sob, cough productive of green phlegm and fevers/chills.
On examination wheeze bilaterally, creps bibasally. Working hard with breathing.
Temp35, bp200/100, p105, sats 92% on 15 litres
From that smidgeon of information tell me what you think is wrong with this lady, what investigations are needed (and how they would help) and what treatment you would start (exact treatment not vague)
O and who to refer to.