Health guide

Laboratory tests

Explore what laboratory tests measure, why they are ordered, and the clinical contexts in which results are evaluated.

Test guide

389 articles

High White Blood Cell Count (WBC): What Does It Mean?View test information
High White Blood Cells in Urine: What Does It Mean?View test information
High Zinc: What Does It Mean?View test information
HIV Ag/Ab Negative/Nonreactive: What Does It Mean?View test information
HIV Ag/Ab Positive/Reactive: What Does It Mean?View test information
HIV Ag/Ab What Does This Test Mean?View test information
HOMA-IR High Result: What Does It Mean?View test information
HOMA-IR What Does This Test Mean?View test information
hs-CRP: High Result: What Does It Mean?View test information
hs-CRP: What Does This Test Measure?View test information
INR: High Result: What Does It Mean?View test information
INR: Low Result: What Does It Mean?View test information
INR: What Does This Test Measure?View test information
Ionized Calcium: What Does This Test Measure?View test information
Ketones in Urine During Pregnancy: What Does It Mean?View test information
Ketones in Urine: What Does This Test Mean?View test information
Lactate: High Result: What Does It Mean?View test information
Lactate: What Does This Test Measure?View test information
LDH: High Result: What Does It Mean?View test information
LDH: What Does This Test Measure?View test information
LDL Cholesterol in Children: How Are Results Interpreted?View test information
LDL Cholesterol: What Does This Test Measure?View test information
Leukocyte Esterase: What Does This Test Mean?View test information
LH: What Does This Blood Test Measure?View test information
Lipase: High Result: What Does It Mean?View test information
Lipase: Low Result: What Does It Mean?View test information
Lipase: What Does This Test Measure?View test information
Lipoprotein(a): What Does This Test Measure?View test information
Low 25-Hydroxyvitamin D: What Does It Mean?View test information
Low Albumin: What Does It Mean?View test information
Low ALP: What Does It Mean?View test information
Low ALT: What Does It Mean?View test information
Low AMH: What Does It Mean?View test information
Low AST: What Does It Mean?View test information
Low Bicarbonate (CO2): What Does It Mean?View test information
Low BUN: What Does It Mean?View test information
Low Chloride: What Does It Mean?View test information
Low Cortisol: What Does It Mean?View test information
Low Creatinine: What Does It Mean?View test information
Low eGFR: What Does It Mean?View test information
Low Estradiol (E2): What Does It Mean?View test information
Low Ferritin: What Does It Mean?View test information
Low Folate: What Does It Mean?View test information
Low Free T4 (FT4): What Does It Mean?View test information
Low FSH: What Does It Mean?View test information
Low GGT: What Does It Mean?View test information
Low Glucose: What Does It Mean?View test information
Low HDL Cholesterol: What Does It Mean?View test information
Low Hematocrit (HCT): What Does It Mean?View test information
Low Hemoglobin (HGB): What Does It Mean?View test information