What Does a Hematocrit Test Measure? A hematocrit test is a blood test that measures the level of red blood cells in your blood. Your blood is made up of plasma and blood cells. Plasma is the liquid ...

Pituitary tumors are atypical growths that develop in the pituitary gland. They are typically noncancerous. Doctors often use blood tests as a first step in diagnosing pituitary tumors. The pituitary ...

Professor of Chemical and Biological Engineering, Biomedical Engineering, and Public Health, Colorado State University Your blood serves numerous roles to maintain your health. To carry out these ...

Thyroid blood tests help figure out how well your thyroid gland is working. TSH helps the thyroid gland know when to make ...

Type 2 diabetes is diagnosed by testing your blood glucose (sugar) levels. These tests, such as the fasting plasma glucose test and the A1C blood test, are usually done in a healthcare provider's ...

A complement C4 (also known as a complement component 4, or simply C4) is a test to measure the level of C4 proteins you have in your blood. These proteins play a role in how your immune system ...

A blood test conducted in a prehospital setting may rapidly distinguish between ischemic and hemorrhagic stroke, potentially facilitating more rapid, targeted treatment. The test measures the levels ...

Blood draws for several kinds of diagnostic tests require you to fast for several hours. Eating or drinking anything besides water can skew the results, leading to you needing to be retested. You may ...