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Lab Tests Beginning With B
10 tests in the Lab Values reference begin with the letter B. Every name links to a page with its typical adult range in both unit systems, plain-language notes on high and low results, and preparation notes where they apply.
A B C D E F G H I L M N NUMBERS O P R S T U V W Z
| Test | Abbr. | Typical range (conventional) | Typical range (SI) |
|---|---|---|---|
| B-Type Natriuretic Peptide | BNP | <100 pg/mL | <29 pmol/L |
| Base Excess | BE | -2 to +2 mEq/L | -2 to +2 mmol/L |
| Basophils % | — | 0–2 % | 0–2 % |
| Beta-Hydroxybutyrate | — | <3.0 mg/dL | <0.30 mmol/L |
| Bicarbonate | HCO3 | 23–30 mEq/L | 23–30 mmol/L |
| Bilirubin, Direct | — | 0.0–0.3 mg/dL | 0–5 µmol/L |
| Bilirubin, Indirect | — | 0.2–0.8 mg/dL | 3–14 µmol/L |
| Bilirubin, Total | — | 0.3–1.2 mg/dL | 5–21 µmol/L |
| Blood Urea Nitrogen | BUN | 7–20 mg/dL | 2.5–7.1 mmol/L |
| BUN-to-Creatinine Ratio | — | 10–20 ratio | 10–20 ratio |
Please note: Reference ranges vary between laboratories, and between the methods and instruments they use — the range printed on your own report is the one your result should be compared with. A result outside the range is not by itself a diagnosis, and a result inside it does not rule out illness. These pages are an educational summary, not medical advice: always discuss your results with the clinician who ordered them, who can interpret them in the context of your health and history.