Article
Recommendations for establishing metrological traceability for in vitro diagnostic measurement procedures intended to be used for whole blood samples.
Research record from Clin Chim Acta, 2026-03-12. PMID 41831665.
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Article
Research record from Clin Chim Acta, 2026-03-12. PMID 41831665.
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A red blood cell (RBC) count measures the number of red blood cells, also known as erythrocytes, in your blood. Red blood cells are made in your bone marrow, the spongy tissue inside your large bones. They contain hemoglobin, an iron-rich protein that carries oxygen from your lungs to every cell in your body. Your cells need oxygen to grow, reproduce, and make energy for you to function. An RBC count that is higher or lower than normal is often the first sign of an illness. So, the test may allow you to get treatment even before you have symptoms.
Tests
Red blood cell (RBC) indices measure your red blood cells' size, shape, and quality. Red blood cells are also known as erythrocytes. They are made in your bone marrow (the spongy tissue inside your large bones). They contain hemoglobin, an iron-rich protein in your red blood cells that carries oxygen from your lungs to every cell in your body. Your cells need oxygen to grow, reproduce, and make energy.
Tests
An RBC (red blood cell) antibody screen is a blood test that looks for RBC antibodies in your blood. These antibodies destroy red blood cells that are foreign (different from your own).
Tests
The determination of the amount of red blood cell casts present in a urine sample.
Tests
The determination of the concentration of folic acid present in a sample of red blood cells.
Article
Research record from Pract Lab Med, 2026-07-27. PMID 42571333.
Article
Research record from J Coll Physicians Surg Pak, 2026-03-01. PMID 41781826.
Tests
This test measures the level of renin in your blood. Renin is an enzyme, a protein that speeds up certain chemical reactions in your body. It's made by your kidneys. When your blood pressure or sodium decreases or your potassium increases, your kidneys release renin. That's because renin also acts as a hormone (a chemical messenger in your bloodstream that controls the actions of certain cells or organs) to help control your blood pressure.
Tests
A reticulocyte count (retic count) measures the number of reticulocytes in your blood. Reticulocytes are immature (still developing) red blood cells (RBCs). Your body makes reticulocytes in your bone marrow. Then it sends them into your blood, where they mature into red blood cells within one to two days. The main job of the red blood cells is to move oxygen from your lungs to every cell in your body.
Tests
An immunology test to measure for the presence of the Rh factor antigen in blood.
Tests
A rheumatoid factor (RF) test checks a sample of your blood for rheumatoid factor, a protein made by the immune system .