MSFinals-5100

MSFinals-5100

A 30-year-old woman is receiving treatment for a severe exacerbation of ulcerative colitis on a general medical ward. She is currently on IV steroids for the past 4 days. During the morning ward round, her bloods are taken to assess her illness. The results are as follows:

Na+ 136 mmol/L (135 – 145)
K+ 3.5 mmol/L (3.5 – 5.0)
Bicarbonate 25 mmol/L (22 – 29)
Urea 6.5 mmol/L (2.0 – 7.0)
Creatinine 112 µmol/L (55 – 120)
Magnesium 0.38 mmol/L (0.8 – 1.1)
CRP 32 (<5) What would be the most appropriate next step in managing this patient’s illness?