Testing Knowledge
Test Directory
Source-backed test guides: what each test is for, how it is performed, its limitations, and which reviewed products serve it. Personal health questions are answered with knowledge and preparation guidance — not supplier sales.
Effector Memory Helper T-Lymphocyte to Helper T-Lymphocyte Ratio Measurement
The determination of the ratio of T-lymphocytes helper effector memory to T-lymphocytes helper present in a sample. The measurement may be expressed as a ratio or percentage.
Adrenocorticotropic Hormone Measurement
The determination of the amount of adrenocorticotropic hormone present in a sample.
Clonazepam and/or Metabolites Measurement
The determination of the amount of clonazepam and/or its metabolite(s) present in a biological specimen, for an assay that can measure both clonazepam and its metabolites.
Atypical Mononuclear Cell Count
The determination of the atypical mononuclear cells in a sample.
Lactate Dehydrogenase to Creatinine Ratio Measurement
The determination of the ratio of lactate dehydrogenase compared to creatinine present in a sample. The measurement may be expressed as a ratio or percentage.
25-Hydroxyvitamin D2 and 25-Hydroxyvitamin D3 Measurement
The determination of the amount of 25-hydroxyvitamin D2 and 25-hydroxyvitamin D3 present in a sample.
8-Iso-Prostaglandin F2 Alpha to Creatinine Ratio Measurement
The determination of the ratio of the 8-iso-prostaglandin F2 alpha to creatinine in a biological specimen.
Escherichia coli Verotoxin Measurement
The determination of the amount of total Escherichia coli verotoxin in a sample.
Silver Birch Pollen IgG4 Measurement
A measurement of the silver birch pollen IgG4 in a biological specimen.
Apolipoprotein A1 to Apolipoprotein B Ratio Measurement
The determination of the ratio of apolipoprotein A1 compared to apolipoprotein B present in a sample. The measurement may be expressed as a ratio or percentage.
Effector Helper Regulatory T-Lymphocyte to T-Lymphocyte Ratio Measurement
The determination of the ratio of helper regulatory effector T-lymphocytes to T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Respiratory Syncytial Virus Type A Measurement
The determination of the amount of respiratory syncytial virus type A in a biological sample.
Interleukin 13 Measurement
The determination of the amount of interleukin 13 present in a sample.
Functional Alpha-1 Antitrypsin Measurement
The determination of the amount of alpha-1 antitrypsin, Functional present in a sample.
Human Parainfluenza virus RNA Measurement
The determination of the amount of Human Parainfluenza virus RNA in a biological sample.
CD45 to Lymphocyte Ratio Measurement
The determination of the ratio of CD45 expressing cells to total lymphocytes present in a sample. The measurement by be expressed as a ratio or percentage.
Phenobarbital Measurement
The determination of the amount of phenobarbital present in a sample.
B-Lymphocytes B1 Count
The determination of B-lymphocytes B1 in a biospecimen.
Acid Phosphatase Measurement
The determination of the amount of acid phosphatase present in a sample.
Dietary Citrus, Melons, and Berries Measurement
A determination of the total citrus, melons, and berries in a nutritional product or meal, or a portion thereof.
Butyrylfentanyl Measurement
The determination of the amount of the butyrylfentanyl in a sample.
Myoglobin Reoxygenation Time Constant Measurement
A measurement of the exponential time constant of myoglobin reoxygenation.
Stem Cell Memory Helper T-Lymphocyte Subpopulation to Stem Cell Memory Helper T-Lymphocyte Ratio Measurement
A relative measurement (ratio or percentage) of a sub-population of helper stem cell memory T-lymphocytes to total helper stem cell memory T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Pronormoblast to Total Cell Ratio Measurement
The determination of the ratio of pronormoblasts compared to total cells present in a sample. The measurement may be expressed as a ratio or percentage.