Factor VIIIc see von Willebrand screening
Factor II see coagulation factor assays
Factor V see coagulation factor assays
Factor VII see coagulation factor assays
Factor IX see coagulation factor assays
Factor X see coagulation factor assays
Factor XI see coagulation factor assays
Factor XII see coagulation factor assays
Factor XIII see coagulation factor assays
Factor Xa assay see heparin assay (Anti-Xa)
Faecal calprotectin see calprotectin (faeces)
Faecal elastase see elastase (faeces)
Faecal fat no longer routinely available
Faecal occult blood see FIT
Fat globules (faeces) no longer offered.
Fetal anomaly screening see Down, Edwards and Patau syndrome screening
FH genetics see familial hypercholesterolaemia (genetics)
Fibrin degradation products (FDP) see D-dimers
Fibrinogen (Clauss) see coagulation screen
Fibroblast growth factor 23 see FGF-23
Fibrosis-4 score see FIB-4
"Fish odour syndrome" see trimethylaminuria
FIT (faecal immunochenical test for haemoglobin)
Fluid biochemistry see pleural fluid biochemistry, ascitic fluid, beta-2 transferrin (for ?CSF-containing fluids)
FOB see FIT
Foetal maternal haemorrhage see fetal maternal haemorrhage
Follicle stimulating hormone see FSH
Fractional excretion of calcium see calcium (urine)
Fractional excretion of phosphate see phosphate (urine)
Fractional water, sodium and potassium excretion see fluid balance profile
Free carnitine see acylcarnitines
Free fatty acids (non-esterified fatty acids, NEFA)
Free light chains, urine see Bence Jones protein
Free phenytoin see phenytoin
Free PSA no longer routinely available.
Free T3 and T4 see TFT
Free testosterone see testosterone
Free water clearance see fluid balance profile
Full blood count see FBC
Functional antibody testing see vaccine immunity testing
Fycompa see perampanel