Davis's Drug Guide

Normal Values of Common Laboratory Tests

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General

SERUM TESTS

HEMATOLOGICMENWOMEN
Hemoglobin13.5–18 g/dL12–16 g/dL
Hematocrit40–54%38–47%
Red blood cells (RBC)4.6–6.2 million/mm34.2–5.4 million/mm3
Mean corpuscular volume (MCV)76–100 (micrometer)376–100 (micrometer)3
Mean corpuscular hemoglobin (MCH)27–33 picogram27–33 picogram
Mean corpuscular hemoglobin concentration (MCHC)33–37 g/dL33–37 g/dL
Erythrocyte sedimentation rate (ESR)≤20 mm/hr≤30 mm/hr
Leukocytes (WBC)5000–10,000/mm35000–10,000/mm3
Neutrophils54–75% (3000–7500/mm3)54–75% (3000–7500/mm3)
Bands3–8% (150–700/mm3)3–8% (150–700/mm3)
Eosinophils1–4% (50–400/mm3)1–4% (50–400/mm3)
Basophils0–1% (25–100/mm3)0–1% (25–100/mm3)
Monocytes2–8% (100–500/mm3)2–8% (100–500/mm3)
Lymphocytes25–40% (1500–4500/mm3)25–40% (1500–4500/mm3)
T lymphocytes60–80% of lymphocytes60–80% of lymphocytes
B lymphocytes10–20% of lymphocytes10–20% of lymphocytes
Platelets150,000–450,000/mm3150,000–450,000/mm3
Prothrombin time (PT)9.6–11.8 sec9.5–11.3 sec
Partial thromboplastin time (PTT)30–45 sec30–45 sec
Bleeding time (duke)1–3 min1–3 min
(ivy)3–6 min3–6 min
(template)3–6 min3–6 min
CHEMISTRYMENWOMEN
Sodium135–145 mEq/L135–145 mEq/L
Potassium3.5–5.0 mEq/L3.5–5.0 mEq/L
Chloride95–105 mEq/L95–105 mEq/L
Bicarbonate (HCO3)19–25 mEq/L19–25 mEq/L
Total calcium9–11 mg/dL or 4.5–5.5 mEq/L9–11 mg/dL or 4.5–5.5 mEq/L
Ionized calcium4.2–5.4 mg/dL or 2.1–2.6 mEq/L4.2–5.4 mg/dL or 2.1–2.6 mEq/L
Phosphorus/phosphate2.4–4.7 mg/dL2.4–4.7 mg/dL
Magnesium1.8–3.0 mg/dL or 1.5–2.5 mEq/L1.8–3.0 mg/dL or 1.5–2.5 mEq/L
Glucose65–99 mg/dL65–99 mg/dL
Osmolality285–310 mOsm/kg285–310 mOsm/kg
Ammonia (NH3)10–80 mcg/dL10–80 mcg/dL
Amylase≤130 U/L≤130 U/L
Creatine phosphokinase total (CK, CPK)<150 U/L<150 U/L
Creatine kinase isoenzymes, MB fraction>5% in MI>5% in MI
Lactic dehydrogenase (LDH)50–150 U/L50–150 U/L
Protein, total6–8 g/d6–8 g/d
Albumin4–6 g/dL4–6 g/dL
HEPATICMENWOMEN
AST8–46 U/L7–34 U/L
ALT10–30 IU/mL10–30 IU/mL
Total bilirubin0.3–1.2 mg/dL0.3–1.2 mg/dL
Conjugated bilirubin0.0–0.2 mg/dL0.0–0.2 mg/dL
Unconjugated (indirect) bilirubin0.2–0.8 mg/dL0.2–0.8 mg/dL
Alkaline phosphatase20–90 U/L20–90 U/L
RENALMENWOMEN
BUN6–20 mg/dL6–20 mg/dL
Creatinine0.6–1.3 mg/dL0.5–1.0 mg/dL
Uric acid4.0–8.5 mg/dL2.7–7.3 mg/dL
ARTERIAL BLOOD GASESMENWOMEN
pH7.35–7.457.35–7.45
Po280–100 mm Hg80–100 mm Hg
Pco235–45 mm Hg35–45 mm Hg
O2 saturation95–97%95–97%
Base excess+2–(-2)+2–(-2)
Bicarbonate (HCO3-)22–26 mEq/L22–26 mEq/L

URINE TESTS

URINEMENWOMEN
pH4.5–8.04.5–8.0
Specific gravity1.010–1.0251.010–1.025

DRUG LEVELS, THERAPEUTIC AND TOXIC CONVENTIONAL

(US SYSTEM OF MEASUREMENTS)

DRUGTHERAPEUTIC LEVELTOXIC LEVEL
acetaminophen10–30 mcg/mL>200 mcg/mL at 4 hr or 50 mcg/mL at 12 hr after ingestion
amikacinpeak: 20–30 mcg/mL peak: >40 mcg/mL
trough: <8 mcg/mLtrough: >10 mcg/mL
amiodarone0.5–2.5 mg/L>2.5 mg/L
amitriptyline0.5–2.5 mcg/mL>2.5 mcg/mL
amoxapine120–150 ng/mL>500 ng/mL
carbamazepine4–12 mcg/mL>15 mcg/mL
chloramphenicolpeak: 10–25 mcg/mL peak: >40 mcg/mL
trough: 5–15 mcg/mLtrough: >15 mcg/mL
chlordiazepoxide0.1–3 mcg/mL>25 mcg/mL
chlorpromazine50–300 ng/mL>750 ng/mL
clonazepam20–80 ng/mL>80 ng/mL
cyclosporine100–400 ng/mL>400 ng/mL
desipramine50–300 ng/mL>300 ng/mL
diazepam0.2–1.5 mcg/mL>1.5 mcg/mL
digoxin0.5–2 ng/mL>2.5 ng/mL
disopyramide2.8–7.5 mcg/mL>7.5 mcg/mL
doxepin110–250 ng/mL>500 ng/mL
ethosuximide40–100 mcg/mL>100 mcg/mL
flecainide0.2–1 mcg/mL>1 mcg/mL
gentamicinpeak: 6–10 mcg/mLtrough: >1 mcg/mL
trough: <1 mcg/mL
haloperidol5–20 ng/mL>42 ng/mL
imipramine150–250 ng/mL>500 ng/mL
kanamycinpeak: 15–30 mcg/mLpeak: >35 mcg/mL
trough: 5–10 mcg/mLtrough: >10 mcg/mL
lidocaine1.5–5 mcg/mL>6 mcg/mL
lithium0.6–1.2 mEq/L>1.5 mEq/L
meperidine70–500 ng/mL>1000 ng/mL
mexiletine0.5–2 mcg/mL>2 mcg/mL
morphine65–80 ng/mL>200 ng/mL
nortriptyline50–150 ng/mL>500 ng/mL
phenobarbital15–40 mcg/mL>40 mcg/mL
phenytoin10–20 mcg/mL>30 mcg/mL
primidone5–12 mcg/mL>15 mcg/mL
procainamideprocainamide: 4–10 mcg/mLprocainamide: >10 mcg/mL
N-acetylprocainamide (NAPA): 15–25 mcg/mL
propranolol50–100 ng/mL>150 ng/mL
quinidine2–5 mcg/mL>6 mcg/mL
salicylate100–400 mcg/mL>400 mcg/mL
theophylline10–20 mcg/mL>20 mcg/mL
tobramycinpeak: 6–10 mcg/mLtrough: >1 mcg/mL
trough: <1 mcg/mL
trazadone0.5–2.5 mcg/mL>2.5 mcg/mL
valproic acid50–125 mcg/mL>125 mcg/mL
vancomycintrough: 10–20 mcg/mLtrough: >20 mcg/mL

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