Doctors order a blood urea nitrogen (BUN) test to measure the amount of urea nitrogen in your blood. ... Blood tests draw a small amount of blood, and there are usually few or mild side effects.

Before going in for a blood draw, ... The doctor may order another blood test as a confirmation. Based on the findings, your doctor will advise you on therapies, treatments, ...

There are a lot of steps between when your doctor orders a blood test to establishing a diagnosis. From the bedside to the lab bench, here’s how laboratory testing works.

The test can be completed via a blood draw at a routine medical exam, making it less invasive than a colonoscopy. It works by detecting signals of cancer in the blood, such as DNA shed by tumors ...

If your doctor thinks you have the symptoms of a serious infection, they may order a blood culture test. Learn why you might need this test and what to expect.

Blood tests are common, but can cause fear or anxiety for some. Fox News Digital spoke with a doctor about what you can do to be prepared and comfortable before your next blood draw.

Doctors use a simple blood test to determine typical or atypical CO2 levels in the body. Learn about the CO2 blood test, and how to interpret the results, here.