B cell counts see lymphocyte subsets (B, T, NK cell counts)
B1 see vitamin B1
B2 see vitamin B2
B6 see vitamin B6
Basophils see FBC
Beta-2 glycoprotein-1 antibody see anti-phospholipid antibodies
Beta amyloid (CSF) see total Tau and A-beta 1-42 (CSF)
Beta crosslaps see CTX
Beta HCG (beta human chorionic gonadotrophin, β-HCG)
Bleeding time - test no longer available.
Blood gases - please use the ward-based blood gas analysers (click here for POCT information).
BNP see NT-proBNP
Borrelia serology see Lyme serology (borreliosis)
Butyrylcholinesterase see cholinesterase (serum)