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Lab Values
Standard Lab Values
31
Nursing
Beginner
10/01/2020
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Term
Red Blood Cells
(RBC × 106/μL or RBC × 1012/L [SI units])
 Definition
Adult/elderly:
Male: 4.7–6.1
Female: 4.2–5.4
Term
Hemoglobin
 Definition
Male: 14–18 g/dL or 8.7–11.2 mmol/L (SI units)
Female: 12–16 g/dL or 7.4–9.9 mmol/L
Term
Hematocrit
 Definition
Male: 42%–52% or 0.42–0.52 volume fraction (SI units)
Female: 37%–47% or 0.37–0.47 volume fraction (SI units)
Term
White Blood Cells
 Definition
Adult/child >2 years:
5000–10,000/mm3 or 5–10 × 109/L (SI units)
Term
Neutrophils
 Definition
55-70% / 2500–8000
Term
Bands
 Definition
0–5% / 0-500
Term
Lymphocytes
 Definition
20–40% / 1000–4000
Term
Monocytes
 Definition
2–8% / 100–700
Term
Eosinophils
 Definition
1–4% / 50–500
Term
Basophils
 Definition
0.5–1% / 25–100
Term
Platelets (Thrombocytes)
 Definition
Adult/elderly: 150,000–400,000/mm3 or 150–400 × 109/L (SI units)
Term
PT
 Definition
11.0–12.5 seconds; 85%–100%
Full anticoagulant therapy: >1.5–2 times control value; 20%–30%
Term
INR
 Definition
INR: 0.8–1.1
Anticoagulation
Indication / Preferred INR
Deep-vein thrombosis prophylaxis 1.5–2
Orthopedic surgery 2–3
Deep-vein thrombosis 2–3
Atrial fibrillation 2–3
Pulmonary embolism 2.5–3.5
Prosthetic valve prophylaxis 3–4
Term
PTT
 Definition
PTT: 60–70 seconds
Patients receiving anticoagulant therapy: 1.5–2.5 times control value in seconds
Term
BUN
 Definition
Adult: 10–20 mg/dL or 3.6–7.1 mmol/L (SI units)
Term
Creatinine
 Definition
18 years to <41 years: Female: 0.5–1.0 mg/dL
18 years to <41 years: Male: 0.6–1.2 mg/dL
41 years to <61 years: Female: 0.5–1.1 mg/dL
41 years to <61 years: Male: 0.6–1.3 mg/dL
61 years and above: Female: 0.5–1.2 mg/dL
61 years and above: Male: 0.7–1.3 mg/dL
Term
Sodium
 Definition
Adult/elderly: 136–145 mEq/L or 136/145 mmol/L (SI units)
Term
Potassium
 Definition
Adult/elderly: 3.5–5 mEq/L or 3.5–5 mmol/L (SI units)
Child: 3.4–4.7 mEq/L
Infant: 4.1–5.3 mEq/L
Newborn: 3.9–5.9 mEq/L
Term
Chloride
 Definition
Adult/elderly: 98–106 mEq/L or 98–106 mmol/L (SI units)
Child: 90–110 mEq/L
Newborn: 96–106 mEq/L
Premature infant: 95–110 mEq/L
Term
Calcium
 Definition
Adult∗ 9.0–10.5 mg / dL / 2.25–2.62 mmol/L
∗ Values tend to decrease in the elderly.
Term
Mg
 Definition
Adult: 1.3–2.1 mEq/L or 0.65–1.05 mmol/L (SI units)
Term
ALT
 Definition
Elderly: may be slightly higher than adult values
Adult/child: 4–36 international units/L at 37°C or 4–36 units/L (SI units)
Term
AST
 Definition
Adult
0–35 units/L or 0–0.58 μkat/L (SI Units)
(Females tend to have slightly lower levels than males.)
Elderly
Slightly higher than adults
Term
TBili
 Definition
Adult/elderly/child
Total bilirubin: 0.3–1.0 mg/dL or 5.1–17 μmol/L (SI units)
Term
Alk Phos
 Definition
Elderly: slightly higher than adult
Adult: 30–120 units/L or 0.5–2.0 μkat/L (SI units)
Term
Ammonia
 Definition
Adult: 10–80 mcg/dL or 6–47 μmol/L (SI units)
Term
Urine pH:
 Definition
4.6-8.0 (average, 6.0)
Term
Urine Specific gravity
 Definition
Adult: 1.005–1.030 (usually, 1.010–1.025)
Elderly: values decrease with age
Term
Protein
 Definition
Protein:
0–8 mg/dL
50–80 mg/24 hr (at rest)
<250 mg/24 hr (during exercise)
Term
BNP:
 Definition
BNP
<100 pg/mL or <100 ng/L (SI units)
Term
Blood Glucose:
 Definition
Adult: 74–106 mg/dL or 4.1–5.9 mmol/L
Elderly: 60–90 years: 82–115 mg/dL or 4.6–6.4 mmol/L
>90 years: 75–121 mg/dL or 4.2–6.7 mmol/L
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