Day 0 · 14:20
Arrival
Her daughter does the talking: two weeks of drinking 'jugs' of water, passing urine constantly, worsening constipation, and for the last three days a muddled, sleepy version of her mother. Background of long smoking history, back pain her GP has been treating as mechanical, and a stone of weight lost since spring.
Vitals
HR104BP108/66RR16SpO296%T36.5
Polyuria, polydipsia, confusion, constipation. Which two bedside-available tests sort this presentation fastest?