A patient presents to the emergency with altered sensorium. All of these tests should be done except:
Complete blood counts
Random blood sugar
Lumbar puncture
Non-contrast CT head
Ans: C. Lumbar puncture(Ref Harrison 19/e p1773, 18/e p2251)Recommends imaging study prior to lumbar puncture.Excludes raised 1CP causes (large intracranial mass lesion) a Preventing herniation.