White cell count
Infection or blood dyscrasia can be a possible cause of dementia-like symptoms, but Dr Zheng’s results are normal.
A vitamin-B12 level should be obtained to evaluate for a reversible cause of dementia-like symptoms. Dr Zheng’s levels are within normal limits, so this is not the cause of his memory problems.
Kidney function tests
Renal function is assessed to rule out metabolic disturbance or kidney dysfunction that can cause dementia-like symptoms. Dr Zheng’s tests are normal.
Urea and Electrolytes
Electrolytes disturbance (eg hyponataemia) is a common cause of confusion, but not in Dr Zheng’s case – his results are within normal range.
Liver Function Test
Liver dysfunction is a possible cause of dementia-like symptoms, but once again, Dr Zheng’s results are normal.
Hypoglycaemia can cloud cognitive function and therefore simulate dementia. Results show this is not the case for Dr Zheng.
To rule out potential reversible causes of dementia-like symptoms, by indirectly measuring how much inflammation is in the body. Dr Zheng’s result is within normal range.
Thyroid function test
Metabolic disturbances are a possible cause of dementia-like symptoms, but Dr Zheng’s results are normal.
Not required in the investigation for dementia – but reasonable test to consider if Dr Zheng has prostatism.
May be considered to assess Dr Zheng’s vascular risk.
The UA is not necessary for the diagnosis of dementia – but may be useful if UTI is suspected.