Lab report names starting with R

Abbreviations

• R506QFactor V Leiden (R506Q)A DNA test for a common inherited change in the F5 gene that lets blood clot a little more easily. Most people who carry it never develop a problem clot.
• RA FactorRheumatoid Factor (RF)A blood test for rheumatoid factor, an antibody often found in rheumatoid arthritis but also in other conditions and in some healthy people.
• rAna o 3Ana o 3 (cashew) IgEMeasures IgE to Ana o 3, a protein stored in cashew seeds. Higher levels are more common in people with true cashew allergy, including strong reactions.
• rAra h 2Ara h 2 (peanut) IgEMeasures IgE to Ara h 2, a peanut seed protein. It is one of the peanut components most closely tied to true peanut allergy and strong reactions.
• rAra h 8Ara h 8 (peanut) IgEMeasures IgE to Ara h 8, a peanut protein that looks like a birch pollen protein. It is generally linked to milder, mouth-area symptoms, though stronger reactions are not ruled out.
• RBCRed Blood Cell CountThe number of red blood cells in a sample of your blood. These cells carry oxygen from your lungs to the rest of your body.
• RBC DHADHA (Docosahexaenoic Acid), RBCThe share of your red blood cell membranes made of DHA, an omega-3 fat. It reflects your omega-3 intake over about the past four months.
• RBC EPAEPA (Eicosapentaenoic Acid), RBCThe share of your red blood cell membranes made of EPA, an omega-3 fat. It reflects your omega-3 intake over about the past four months.
• RBC folateFolate, Red Blood CellMeasures the folate stored inside your red blood cells. It reflects your folate status over roughly the past three to four months.
• RBC MgMagnesium, RBCMagnesium measured inside your red blood cells. Some clinicians use it to look at magnesium stores, but how well it reflects your whole-body magnesium is debated.
• RBC morphRBC MorphologyA written description of how your red blood cells look under a microscope: their size, color, shape and any unusual features.
• RBC/HPFUrine Red Blood Cells (RBC)Counts red blood cells in your urine under a microscope or analyzer, per high-power field (HPF). A few can be usual.
• RBSGlucoseGlucose is the sugar in your blood and your body's main fuel. This test shows how much is there at the moment the sample is drawn.
• RCCRed Blood Cell CountThe number of red blood cells in a sample of your blood. These cells carry oxygen from your lungs to the rest of your body.
• RCFFolate, Red Blood CellMeasures the folate stored inside your red blood cells. It reflects your folate status over roughly the past three to four months.
• rCor a 14Cor a 14 (hazelnut) IgEMeasures IgE to Cor a 14, a hazelnut storage protein. It is more often found in people who react to eating hazelnut.
• RDTMalaria Antigen (Rapid Test)A quick finger-prick or blood-draw test that looks for proteins from malaria parasites. In the US, a positive or negative result is followed up with a blood smear.
• RDWRed Cell Distribution Width (RDW-CV)How much your red blood cells vary in size. A higher number means a wider mix of small and large cells.
• RDW-CVRed Cell Distribution Width (RDW-CV)How much your red blood cells vary in size. A higher number means a wider mix of small and large cells.
• RDW-SDRed Cell Distribution Width (RDW-SD)How wide the spread of red blood cell sizes is, in femtoliters (fL). A higher number means a wider mix of small and large cells.
• Remnant-CRemnant CholesterolThe cholesterol in the leftover, fat-carrying particles in your blood, worked out from your lipid panel. Higher levels are linked to more heart disease.
• Ret-HeReticulocyte Hemoglobin Content (CHr / Ret-He)How much hemoglobin is in your newest red blood cells, in picograms (pg). It reflects the iron available to your bone marrow over the last few days.
• RET#Reticulocyte Count (Absolute)The number of reticulocytes (very young red blood cells) in a set amount of blood. It shows how many new red cells your bone marrow is releasing.
• RET%Reticulocyte Count (Percent)The share of your red blood cells that are brand new. It shows how actively your bone marrow is making red cells.
• Retic %Reticulocyte Count (Percent)The share of your red blood cells that are brand new. It shows how actively your bone marrow is making red cells.
• RFRheumatoid Factor (RF)A blood test for rheumatoid factor, an antibody often found in rheumatoid arthritis but also in other conditions and in some healthy people.
• RFTKidney Function Test (KFT / RFT)Lab panelIndian-style kidney panel that prints urea and BUN side by side, plus creatinine, uric acid, minerals and electrolytes.
• RhRh (D) TypeShows whether your red blood cells carry the Rh (D) protein: positive if they do, negative if not. It matters for transfusions and pregnancy.
• RhDRh (D) TypeShows whether your red blood cells carry the Rh (D) protein: positive if they do, negative if not. It matters for transfusions and pregnancy.
• RHeReticulocyte Hemoglobin Content (CHr / Ret-He)How much hemoglobin is in your newest red blood cells, in picograms (pg). It reflects the iron available to your bone marrow over the last few days.
• RLP-CRemnant CholesterolThe cholesterol in the leftover, fat-carrying particles in your blood, worked out from your lipid panel. Higher levels are linked to more heart disease.
• RPRRPR (Rapid Plasma Reagin)A blood test used to help find syphilis and to follow its treatment. A reactive result needs a second, more specific test to confirm it.
• rT3Reverse T3An inactive by-product of thyroxine (T4). Its usefulness is limited, and an American Thyroid Association review says routine testing is not needed.
• RTEUrine Renal Tubular Epithelial CellsA count of kidney tubule cells in urine, where none seen is the usual result and more can mean the tubules are irritated or injured.
• RTE cellsUrine Renal Tubular Epithelial CellsA count of kidney tubule cells in urine, where none seen is the usual result and more can mean the tubules are irritated or injured.
• RTECUrine Renal Tubular Epithelial CellsA count of kidney tubule cells in urine, where none seen is the usual result and more can mean the tubules are irritated or injured.
• Rubella Ab IgGRubella IgGShows whether you have antibodies to the rubella (German measles) virus, from vaccination or past infection. Often checked before or early in pregnancy.
• Rubeola IgGMeasles (Rubeola) IgGChecks for antibodies that show your body has met the measles virus, through vaccination or past infection. It is often used to check immunity.