Lab report names starting with B

Abbreviations

• B-hCGhCG, Total, Quantitative (Beta-hCG)The pregnancy hormone, measured as a number. It rises quickly in early pregnancy, so a trend over days tells more than a single value.
• B-HgMercury, BloodTotal mercury in whole blood, which mostly reflects methylmercury from fish and shellfish and any recent exposure.
• B1Vitamin B1 (Thiamine)Measures the active form of vitamin B1 (thiamine) in whole blood, to see whether your body has enough of this B vitamin.
• B12Vitamin B12 (Cobalamin)Measures the vitamin B12 in your blood. Your nerves and red blood cells need B12, so this is the usual first check of your B12 status.
• B27HLA-B27A one-time test for HLA-B27, a protein on white blood cells. Many people who have it stay healthy, but it is more common in some kinds of inflammatory arthritis and eye inflammation.
• B2GP1 IgGBeta-2 Glycoprotein I Antibody IgGMeasures IgG antibodies against beta-2 glycoprotein I, a blood protein. It is one of the tests used when a clinician is looking into antiphospholipid syndrome (APS).
• B2GP1 IgMBeta-2 Glycoprotein I Antibody IgMMeasures IgM antibodies against beta-2 glycoprotein I, a blood protein. It is one of the tests used when a clinician is looking into antiphospholipid syndrome (APS).
• B2GPI IgGBeta-2 Glycoprotein I Antibody IgGMeasures IgG antibodies against beta-2 glycoprotein I, a blood protein. It is one of the tests used when a clinician is looking into antiphospholipid syndrome (APS).
• B2GPI IgMBeta-2 Glycoprotein I Antibody IgMMeasures IgM antibodies against beta-2 glycoprotein I, a blood protein. It is one of the tests used when a clinician is looking into antiphospholipid syndrome (APS).
• B6Vitamin B6 (Pyridoxal 5-Phosphate)Measures pyridoxal 5'-phosphate (PLP), the active form of vitamin B6, to see how much B6 your body has available.
• B9Folate (Vitamin B9), SerumMeasures folate (vitamin B9) in your blood. It mostly reflects what you ate recently, and it helps explain anemia and low folate intake.
• BACEthanol (Blood Alcohol)Measures how much alcohol (ethanol) is in your blood at the moment of the draw. It is a snapshot of very recent drinking, not a long-term marker.
• BANDBand Neutrophils (Percent)The share of your white blood cells that are band neutrophils, young neutrophils released early when the body is fighting an infection or inflammation.
• BARBUrine Barbiturates ScreenA urine screen for barbiturates, older sedative medicines such as phenobarbital and butalbital. A first positive is presumptive until a second test confirms it.
• BASO#Basophils (Absolute)The number of basophils, the rarest white blood cell, in each microliter of your blood. Basophils take part in allergic reactions.
• BASO%Basophils (Percent)The share of your white blood cells that are basophils, the rarest white cell type, which takes part in allergic reactions.
• Bb AbLyme Disease Antibody (Screen)A first-step blood test for antibodies to the bacteria that cause Lyme disease. A positive or equivocal result is followed by a second test.
• BDBase Excess (Base Deficit)A calculated number showing extra acid or base in your blood, apart from breathing. A negative value is a base deficit.
• BEBase Excess (Base Deficit)A calculated number showing extra acid or base in your blood, apart from breathing. A negative value is a base deficit.
• BE(B)Base Excess (Base Deficit)A calculated number showing extra acid or base in your blood, apart from breathing. A negative value is a base deficit.
• BENZOUrine Benzodiazepines ScreenA urine screen for benzodiazepines, a family of sedatives such as diazepam. It can miss some of them, and a positive is presumptive until confirmed.
• BFMPMalaria Parasite Smear (Thick/Thin Film)A microscope exam of a blood sample that shows whether malaria parasites are present, which species they are and how many red cells are infected.
• BHWidal, Salmonella Paratyphi B (BH) TiterA Widal test titer for the flagellar (H) antigen of Salmonella Paratyphi B, a relative of the typhoid bacterium.
• BHBBeta-Hydroxybutyrate (BHB)Beta-hydroxybutyrate (BHB) is the main ketone your body makes when it burns fat for fuel. It rises with fasting, low-carb eating or too little insulin.
• Bio-TTestosterone, BioavailableThe part of your testosterone that isn't tightly bound to SHBG, so it is free or loosely held by albumin. It is ordered less often than total testosterone.
• BLDUrine Blood (Dipstick)A dipstick check for blood in your urine. It reacts to red blood cells, hemoglobin and myoglobin, so a positive result is usually followed by a microscope check.
• BLLLead, BloodMeasures lead in your blood, the standard test for recent lead exposure. Most people in the US have very low levels.
• BMPBasic Metabolic Panel (BMP)Lab panelGlucose, kidney markers, electrolytes and calcium.
• BNPBNP (B-Type Natriuretic Peptide)A hormone your heart releases when it is stretched. It helps clinicians judge whether symptoms like shortness of breath could be from heart failure.
• BOHBBeta-Hydroxybutyrate (BHB)Beta-hydroxybutyrate (BHB) is the main ketone your body makes when it burns fat for fuel. It rises with fasting, low-carb eating or too little insulin.
• Bos d 8Bos d 8 casein (milk) IgEMeasures IgE antibodies to casein, a main protein in cow's milk that holds up to heat, to show whether your immune system has become sensitized to it.
• BR 27.29CA 27.29A protein from the same family as CA 15-3. Doctors use it to follow breast cancer treatment and recurrence, and harmless conditions can raise it too.
• BSGErythrocyte Sedimentation Rate (ESR)A simple blood test that shows how fast red blood cells settle in a tube. A faster rate can be a sign of inflammation somewhere in the body.
• bSTTryptaseMeasures tryptase, a protein mast cells release in allergic reactions. It is checked after a possible severe reaction and to find your usual baseline level.
• BUNBlood Urea Nitrogen (BUN)BUN is a waste product from protein breakdown that your kidneys clear from the blood, so it gives a rough read on kidney function and hydration.
• BUN/CrBUN/Creatinine RatioA calculated comparison of your BUN with your creatinine that clinicians use as one clue to why a kidney-related number is high or low.
• BUPUrine Buprenorphine ScreenA urine test that looks for buprenorphine, a medicine used to treat opioid use disorder and pain. A positive result is expected if you take it as prescribed.
• BZEUrine Cocaine Metabolite (Benzoylecgonine) ScreenA urine screen for benzoylecgonine, the main breakdown product of cocaine. It shows recent exposure, usually over the past few days.
• BZOUrine Benzodiazepines ScreenA urine screen for benzodiazepines, a family of sedatives such as diazepam. It can miss some of them, and a positive is presumptive until confirmed.