Latest

Understand the 1-mg low-dose dexamethasone suppression test, the common cortisol cutoff of 1.8 mcg/dL, causes of nonsuppression, and the follow-up used for Cushing screening.

Low-Dose Dexamethasone Suppression Test: Cushing Syndrome Screening and Results

Learn how an 8–9 a.m. cortisol test screens for adrenal insufficiency, what low and intermediate results mean, how ACTH helps identify the cause, and when stimulation testing is needed.

Morning Cortisol Test: Low Levels, Adrenal Insufficiency, and Results

Learn how a pheochromocytoma and paraganglioma panel uses plasma or urine metanephrines, normetanephrine, catecholamines, and controlled collection to interpret abnormal results.

Pheochromocytoma and Paraganglioma Test Panel: Metanephrines, Normetanephrine, Catecholamines, and Results

Learn what plasma epinephrine, norepinephrine, and dopamine results mean, why collection posture matters, common causes of high values, and when metanephrine testing is preferred.

Plasma Catecholamines Test: Epinephrine, Norepinephrine, Dopamine, and Results

Learn how plasma free metanephrine and normetanephrine testing screens for pheochromocytoma and paraganglioma, why supine rest matters, and how high or borderline results are evaluated.

Plasma Free Metanephrines Test: Pheochromocytoma and Paraganglioma Screening, High Levels, and Results

Learn what a high plasma normetanephrine result means, why supine rest matters, common false-positive causes, when clonidine testing is used, and how PPGL evaluation proceeds.

Plasma Normetanephrine Test: High Levels, Pheochromocytoma Screening, and Results

Diagnostics

Home Diagnostics Page 43

Learn what plateletcrit (PCT) measures, the usual normal range, and what high or low results mean when read with platelet count, MPV, PDW, and CBC findings.

Plateletcrit (PCT) Blood Test Normal Range: Reference Values and Meaning

Learn the normal RBC count range, what low or high red blood cell results mean, common causes, related CBC markers, follow-up tests, and when to seek care.

Red Blood Cell (RBC) Count Test Normal Range: Reference Values and...

Learn what a red blood cell morphology test shows, including abnormal RBC shapes, anemia patterns, blood smear findings, result meanings, and follow-up tests.

Red Blood Cell Morphology Test: Abnormal RBC Shapes, Anemia Types, Blood...

Learn the normal RDW range, what high or low red cell distribution width means, and how RDW is interpreted with MCV, hemoglobin, iron, B12, and CBC results.

Red Cell Distribution Width (RDW) Normal Range: Reference Values and Meaning

Learn how reticulocyte count and hemoglobin work together to show anemia recovery, marrow response, treatment progress, and when follow-up or urgent care may be needed.

Reticulocyte Count and Hemoglobin: Interpreting Anemia Recovery

Learn the reticulocyte count normal range, what high and low reticulocytes mean, how corrected reticulocyte count and RPI work, and which follow-up tests help explain anemia.

Reticulocyte Count Test Normal Range: Reference Values and Meaning

Learn what a positive or negative sickle cell screen means, how trait differs from disease, when confirmatory testing is needed, and what results mean for anemia, pregnancy, newborns, and follow-up care.

Sickle Cell Screen Test: Positive, Negative, Trait, Disease, and Meaning

Learn how WBC and neutrophil patterns help interpret infection, inflammation, stress responses, high counts, low ANC, neutropenia risk, and when urgent follow-up is needed.

WBC and Neutrophils: Interpreting Infection and Inflammation Patterns

Learn the normal WBC count range, what high and low white blood cell results mean, how the WBC differential changes interpretation, and when follow-up matters.

White Blood Cell (WBC) Count Test Normal Range: Reference Values and...

Learn what the activated clotting time (ACT) test measures, how it monitors heparin, what normal and high ACT results mean, and why targets vary by procedure.

Activated Clotting Time (ACT) Test: Heparin Monitoring, Normal Range, High ACT,...

Learn the aPTT normal range, what high and low activated partial thromboplastin time results mean, and how doctors interpret aPTT with PT, INR, heparin monitoring, mixing studies, and clotting factor tests.

Activated Partial Thromboplastin Time (aPTT) Normal Range: Reference Values and Meaning

Learn what the activated protein C resistance test measures, how it screens for Factor V Leiden, what abnormal ratios mean, and when genetic confirmation or follow-up matters.

Activated Protein C Resistance Test: Factor V Leiden Screening and Results

Learn what an antiphospholipid antibody panel measures, why lupus anticoagulant matters, how APS results are confirmed, and how positive tests relate to clotting risk and pregnancy loss.

Antiphospholipid Antibody Panel: Clotting Risk, Pregnancy Loss, Lupus Anticoagulant, and Results

Learn what the antithrombin activity test measures, what low antithrombin means, common acquired and inherited causes, clot risk, heparin resistance, normal ranges, and follow-up testing.

Antithrombin Activity Test: Low Antithrombin, Blood Clot Risk, Deficiency, and Results

Anti-Xa and aPTT are heparin monitoring tests, but they measure different things. Learn therapeutic ranges, timing, discordant results, and when each test is preferred.

Anti-Xa and aPTT: Heparin Monitoring Tests Compared

Learn what the anti-Xa test measures, common therapeutic ranges for UFH and LMWH, how timing affects results, and what low or high anti-Xa means during heparin treatment.

Anti-Xa Test Therapeutic Range: Heparin Monitoring and Meaning

Learn how aPTT and mixing studies help interpret prolonged clotting time, including corrected vs non-corrected results, factor deficiencies, inhibitors, lupus anticoagulant, heparin effects, and follow-up testing.

aPTT and Mixing Study: Interpreting Prolonged Clotting Time

Understand coagulation panel results, including PT, INR, aPTT, fibrinogen, and D-dimer, with normal ranges, causes of abnormal results, follow-up tests, and urgent warning signs.

Coagulation Panel Test: PT, INR, aPTT, Fibrinogen, D-Dimer, Normal Ranges, and...

Understand D-dimer and fibrinogen results, including normal ranges, high and low patterns, clot breakdown, DIC, inflammation, bleeding risk, and next steps after abnormal coagulation blood tests.

D-Dimer and Fibrinogen: Interpreting Clot Formation and Breakdown

Learn what a D-dimer blood test measures, what high and normal D-dimer results mean, how it helps rule out DVT or pulmonary embolism, and when urgent care is needed.

D-Dimer Blood Test: High D-Dimer, Normal Range, Blood Clots, Pulmonary Embolism,...

1...424344...57 Page 43 of 57