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

25-Hydroxyvitamin D: What Does This Test Measure?View test information
ACTH: What Does This Blood Test Measure?View test information
Albumin: What Does This Test Measure?View test information
ALP: What Does This Test Measure?View test information
ALT: What Does This Test Measure?View test information
AMH by Age: How Do Levels Change?View test information
AMH: What Does This Blood Test Measure?View test information
Amylase: High Result: What Does It Mean?View test information
Amylase: Low Result: What Does It Mean?View test information
Amylase: What Does This Test Measure?View test information
ANA Positive/Reactive: What Does It Mean?View test information
ANA What Does This Test Mean?View test information
Anti-CCP Positive/Reactive: What Does It Mean?View test information
Anti-CCP What Does This Test Mean?View test information
Anti-HBs Negative/Nonreactive: What Does It Mean?View test information
Anti-HBs Positive/Reactive: What Does It Mean?View test information
Anti-HBs What Does This Test Mean?View test information
Anti-HCV Negative/Nonreactive: What Does It Mean?View test information
Anti-HCV Positive/Reactive: What Does It Mean?View test information
Anti-HCV What Does This Test Mean?View test information
Anti-Tg (TgAb): What Does This Blood Test Measure?View test information
Anti-TPO (TPOAb): What Does This Blood Test Measure?View test information
aPTT (PTT): High Result: What Does It Mean?View test information
aPTT (PTT): Low Result: What Does It Mean?View test information
aPTT (PTT): What Does This Test Measure?View test information
AST: What Does This Test Measure?View test information
Bacteria in Urine: What Does This Test Mean?View test information
Beta-hCG High Result: What Does It Mean?View test information
Beta-hCG in Pregnancy: How Is It Interpreted?View test information
Beta-hCG Low Result: What Does It Mean?View test information
Beta-hCG What Does This Test Mean?View test information
Bicarbonate (CO2): What Does This Test Measure?View test information
Blood in Urine (Dipstick): What Does This Test Mean?View test information
BNP: High Result: What Does It Mean?View test information
BNP: What Does This Test Measure?View test information
BUN: What Does This Test Measure?View test information
CA 19-9 High Result: What Does It Mean?View test information
CA 19-9 What Does This Test Mean?View test information
CA-125 High Result: What Does It Mean?View test information
CA-125 What Does This Test Mean?View test information
CEA High Result: What Does It Mean?View test information
CEA What Does This Test Mean?View test information
Chloride: What Does This Test Measure?View test information
CK-MB: High Result: What Does It Mean?View test information
CK-MB: What Does This Test Measure?View test information
Cortisol: What Does This Blood Test Measure?View test information
Creatine Kinase (CK): High Result: What Does It Mean?View test information
Creatine Kinase (CK): What Does This Test Measure?View test information
Creatinine: What Does This Test Measure?View test information
CRP: High Result: What Does It Mean?View test information