Table 2

Clinical blood tests, their normal reference ranges and urgent action levels

Blood testNormal reference rangeUrgent action level
Haemoglobin (male), g/L130–170 <100 or >200 
Haemoglobin (female), g/L115–155 <100 or >200 
Platelets, ×109/L150–400<100 or >1000
Vitamin B12, pg/mL191–900<100
Urea, mmol/L1.7–8.3>20
Creatinine (male), μmol/L66–112>200
Creatinine (female), μmol/L49–92>200
Glucose, mmol/L3.5–10>20
Thyroid stimulating hormone, mIU/L0.27–5.5<0.1 or >10