Biomarkers: explore one system at a time

Showing 961–980 of 1204 results

• Protein/Creatinine Ratio, 24 Hr A ratio calculated from protein and creatinine in a 24-hour urine collection, used to assess how much protein your kidneys are leaking.
• Protein/Creatinine Ratio, Random A ratio calculated from protein and creatinine in a single urine sample, a convenient way to estimate daily protein loss through the kidneys.
• Protein S Activity Measures the activity of Protein S, a natural anticoagulant that works with Protein C. Low activity raises the risk of blood clots.
• Protein S Antigen, Free The unbound, biologically active portion of Protein S, a natural anticoagulant. Low levels raise the risk of blood clots.
• Protein S Antigen, Total Measures the total amount of Protein S — both free and bound forms — a natural anticoagulant. Low levels raise the risk of blood clots.
• Protein, Total, 24 Hr Measures the total protein passed in your urine over 24 hours, used to quantify and monitor protein loss through the kidneys.
• Protein, Total, Random Measures protein in a single random urine sample, usually paired with creatinine to estimate how much protein your kidneys are leaking.
• Prothrombin (Factor II) 20210G > A Mutation A genetic test for the prothrombin (Factor II) gene mutation, which increases the risk of abnormal blood clotting.
• Prothrombin TimePT Prothrombin Time, a measure of how long it takes your blood to clot via one of its main pathways. Used to evaluate bleeding disorders and liver function, and to monitor warfarin therapy.
• PTT-LA Screen A clotting-time screen sensitive to lupus anticoagulant, an antibody linked to blood clots, used as a first step in antiphospholipid testing.
• Pumpkin (f225) IgE Measures IgE antibodies to pumpkin, a food allergen, to check whether your immune system is sensitized to this vegetable.
• Pumpkin Seed (f226) IgE Measures IgE antibodies to pumpkin seed, a seed food allergen, to check whether your immune system is sensitized to it.
• QuantiFERON Nil Control A baseline (no-stimulation) control value used in specialized immune function tests, such as TB or allergy blood testing, to interpret the other results correctly.
• QuantiFERON TB1 Antigen Minus Nil The TB1 antigen tube result minus the nil (background) tube in the QuantiFERON-TB Gold Plus test, reflecting a T-cell response to tuberculosis proteins.
• QuantiFERON TB2 Antigen Minus Nil The TB2 antigen tube result minus the nil (background) tube in the QuantiFERON-TB Gold Plus test, reflecting CD4 and CD8 T-cell responses to tuberculosis.
• QuantiFERON-TB Gold Plus, 1 Tube A blood test that checks whether your immune system has been exposed to tuberculosis, as an alternative to the traditional skin (PPD) test.
• Queen Palm (t72) IgE Measures IgE antibodies to queen palm pollen, a tree allergen common in warm climates, to check whether you are sensitized to it.
• Quinoa (f347) IgE Measures IgE antibodies to quinoa, a seed food allergen, to check whether your immune system is sensitized to this grain-like seed.
• Rabbit Epithelia (e82) IgE Measures IgE antibodies to rabbit epithelia (skin and dander), an animal allergen, to check whether you are sensitized to rabbits.
• Rabbit (f213) IgE Measures IgE antibodies to rabbit meat, a food allergen, to check whether your immune system is sensitized to it.