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 ...

This article was reviewed by Felix Gussone, MD. If you’ve been feeling a bit more couch potato than go-getter lately, ...

Hemoglobin is a protein in red blood cells. It carries oxygen around your body, delivering it to tissues. Hemoglobin also carries carbon dioxide to the lungs so you can breathe it out. Iron is a part ...

Steffini Stalos, DO, FCAP, is a pathology and lab medicine physician. She is also the chief medical officer of the lab consultancy firm Blood Associates, LLC. Mean corpuscular hemoglobin concentration ...

A normal white blood cell count is 5,000 to 10,000 for people assigned male at birth and 4,500 to 11,000 for people assigned female at birth. Some health conditions can affect your WBC count. A white ...

A D-dimer test measures how much D-dimer protein is in the blood. This protein is present when blood clots break down. A typical range is 0-0.50 milligrams per liter (mg/L) of blood. D-dimer is a ...

A chloride blood test measures the levels of chloride in the blood. High levels of chloride cause hyperchloremia. Low levels of chloride cause hypochloremia. Chloride is an electrolyte that helps ...

A GFR of over 90 is considered normal. But having a GFR of 60 or above may also be considered within the normal range if you do not have other signs of kidney disease. Diabetes is a long-term (chronic ...

Dr. Miller: How worried do you need to be when you receive your lab results in the mail or online before your physician's had a chance to talk to you about them? I'm Dr. Tom Miller and we're going to ...