ASCP Reference Ranges for MLS & MLT Examinations

Vocabulary flashcards covering the official combined male and female reference ranges for chemistry, hematology, and body fluids (CSF, seminal fluid, and urine) used for MLS and MLT examinations.

Sodium Reference Range

Conventional units: $136-145\,\text{mmol/L}$; SI units: $136-145\,\text{mmol/L}$.

Potassium Reference Range

Conventional units: $3.5-5.1\,\text{mmol/L}$; SI units: $3.5-5.1\,\text{mmol/L}$.

Chloride Reference Range

Conventional units: $98-107\,\text{mmol/L}$; SI units: $98-107\,\text{mmol/L}$.

Total CO2 Reference Range

Conventional units: $22-33\,\text{mmol/L}$; SI units: $22-33\,\text{mmol/L}$.

Creatinine Reference Range

Conventional units: $0.8-1.2\,\text{mg/dL}$; SI units: $71-106\,\mu\text{mol/L}$.

Blood Urea Nitrogen (BUN) Reference Range

Conventional units: $6-20\,\text{mg/dL}$; SI units: $2.1-7.1\,\text{mmol/L}$.

Glucose (Fasting) Reference Range

Conventional units: $74-100\,\text{mg/dL}$; SI units: $4.1-5.6\,\text{mmol/L}$.

Hemoglobin A1C Reference Range

Conventional units: $<5.7\%$; SI units: $<39\,\text{mmol/mol}$.

Haptoglobin Reference Range

Conventional units: $30-200\,\text{mg/dL}$; SI units: $0.3-2.0\,\text{g/L}$.

Arterial Blood Gas pH Reference Range

Conventional and SI units: $7.35-7.45$.

pCO2 Reference Range

Conventional units: $35-44\,\text{mmHg}$; SI units: $4.7-5.9\,\text{kPa}$.

pO2 Reference Range

Conventional units: $>80\,\text{mmHg}$; SI units: $>10.6\,\text{kPa}$.

O2 Saturation Reference Range

Conventional and SI units: $>95\%$.

HCO3 (Bicarbonate) Reference Range

Conventional units: $23-29\,\text{mmol/L}$; SI units: $23-29\,\text{mmol/L}$.

Red Blood Cell Count (RBC) Reference Range

Conventional units: $4.00-6.00 \times 10^6/\mu\text{L}$; SI units: $4.00-6.00 \times 10^{12}/\text{L}$.

Hemoglobin (HGB) Reference Range

Conventional units: $12.0-18.0\,\text{g/dL}$; SI units: $120-180\,\text{g/L}$.

Hematocrit (HCT) Reference Range

Conventional units: $35-50\%$; SI units: $0.35-0.50\,\text{L/L}$.

Mean Corpuscular Volume (MCV) Reference Range

Conventional and SI units: $76-100\,\text{fL}$.

Mean Corpuscular Hemoglobin (MCH) Reference Range

Conventional and SI units: $26-34\,\text{pg}$.

Mean Corpuscular Hemoglobin Concentration (MCHC) Reference Range

Conventional units: $32-36\,\text{g/dL}$; SI units: $320-360\,\text{g/L}$.

Red Blood Cell Distribution Width (RDW) Reference Range

Conventional units: $11.5-14.5\%$; SI units: $0.115-0.145$.

Reticulocytes (Absolute) Reference Range

Conventional units: $20-115 \times 10^3/\mu\text{L}$; SI units: $20-115 \times 10^9/\text{L}$.

Reticulocytes (Relative) Reference Range

Conventional units: $0.5-2.5\%$; SI units: $0.005-0.025$.

Nucleated Red Blood Cells (nRBCs) Reference Range

Conventional and SI units: $0\,\text{nRBC}/100\,\text{WBC}$.

Platelets Reference Range

Conventional units: $150-450 \times 10^3/\mu\text{L}$; SI units: $150-450 \times 10^9/\text{L}$.

White Blood Cell Count (WBC) (Total) Reference Range

Conventional units: $3.6-10.6 \times 10^3/\mu\text{L}$; SI units: $3.6-10.6 \times 10^9/\text{L}$.

Neutrophils (Absolute) Reference Range

Conventional units: $1.7-7.5 \times 10^3/\mu\text{L}$; SI units: $1.7-7.5 \times 10^9/\text{L}$.

Neutrophils (Relative) Reference Range

Conventional units: $50-70\%$; SI units: $0.50-0.70$.

Lymphocytes (Absolute) Reference Range

Conventional units: $1.0-3.2 \times 10^3/\mu\text{L}$; SI units: $1.0-3.2 \times 10^9/\text{L}$.

Lymphocytes (Relative) Reference Range

Conventional units: $18-42\%$; SI units: $0.18-0.42$.

Monocytes (Absolute) Reference Range

Conventional units: $0.1-1.3 \times 10^3/\mu\text{L}$; SI units: $0.1-1.3 \times 10^9/\text{L}$.

Monocytes (Relative) Reference Range

Conventional units: $2-11\%$; SI units: $0.02-0.11$.

Eosinophils (Absolute) Reference Range

Conventional units: $0-0.3 \times 10^3/\mu\text{L}$; SI units: $0-0.3 \times 10^9/\text{L}$.

Eosinophils (Relative) Reference Range

Conventional units: $1-3\%$; SI units: $0.01-0.03$.

Basophils (Absolute) Reference Range

Conventional units: $0-0.2 \times 10^3/\mu\text{L}$; SI units: $0-0.2 \times 10^9/\text{L}$.

Basophils (Relative) Reference Range

Conventional units: $0-2\%$; SI units: $0.00-0.02$.

Cerebrospinal Fluid (CSF) WBC & RBC Reference Range

Conventional units: $0-5/\mu\text{L}$; SI units: $0-5 \times 10^6/\text{L}$.

Cerebrospinal Fluid (CSF) Glucose Reference Range

Conventional units: $50-80\,\text{mg/dL}$; SI units: $2.8-4.4\,\text{mmol/L}$.

Cerebrospinal Fluid (CSF) Protein Reference Range

Conventional units: $15-45\,\text{mg/dL}$; SI units: $150-450\,\text{mg/L}$.

Seminal Fluid Liquefaction Reference Range

Conventional and SI units: $30-60\,\text{minutes}$.

Seminal Fluid WBC Reference Range

Conventional units: $<1 \times 10^6/\text{mL}$; SI units: $<1 \times 10^9/\text{L}$.

Seminal Fluid Volume Reference Range

Conventional and SI units: $2-5\,\text{mL}$.

Seminal Fluid pH Reference Range

Conventional and SI units: $7.2-8.0$.

Seminal Fluid Motility Reference Range

Conventional and SI units: $>50\%$ within $1\,\text{h}$.

Seminal Fluid Sperm Concentration Reference Range

Conventional units: $>20 \times 10^6/\text{mL}$; SI units: $>20 \times 10^9/\text{L}$.

Seminal Fluid Morphology Reference Range

Conventional and SI units: $>30\%$ normal forms.

Urine Specific Gravity Reference Range

Conventional and SI units: $1.003-1.035$.

Urine pH Reference Range

Conventional and SI units: $4.5-8.0$.

Urine Protein Reference Range

Conventional units: $<10\,\text{mg/dL}$, trace, or negative; SI units: $<0.1\,\text{g/L}$, trace, or negative.

Urine Bilirubin Reference Range

Conventional and SI units: negative.

Urine Blood Reference Range

Conventional and SI units: negative.

Urine Glucose Reference Range

Conventional units: $\le 15\,\text{mg/dL}$ or negative; SI units: $\le 0.8\,\text{mmol/L}$ or negative.

Urine Nitrite Reference Range

Conventional and SI units: negative.

Urine Leukocyte Esterase Reference Range

Conventional and SI units: negative.

Urine Urobilinogen Reference Range

Conventional units: $<1.0\,\text{EU}$; SI units: $<17.0\,\mu\text{mol/L}$.

Urine Ketones Reference Range

Conventional units: $<5\,\text{mg/dL}$ or negative; SI units: $<0.5\,\text{mmol/L}$ or negative.

Urine Microscopic RBC Reference Range

Conventional and SI units: $0-3/\text{HPF}$.

Urine Microscopic WBC Reference Range

Conventional and SI units: $0-8/\text{HPF}$.

Urine Microscopic Casts Reference Range

Conventional and SI units: $0-2\text{ hyaline/LPF}$.

Urine Microscopic Epithelial Cells Reference Range

Conventional and SI units: $0-5/\text{HPF}$.