Awake Craniotomy for Tumour Resection

You are an anaesthetist working in a major hospital which includes neurosurgery. You are currently in the preanaesthetic assessment clinic reviewing a 52-year-old man for his suitability to undergo awake craniotomy for tumour resection. He presented with a headache and right-sided weakness two weeks ago. Since diagnosis, his oral medications are: dexamethasone 4 mg TDS levetiracetam 500 mg BD Weight 110 kg, height 182 cm (BMI 33 kg/m2).