Medically reviewed by Archana Sharma, DO A mean corpuscular volume (MCV) test is a blood test that measures the size and volume of your red blood cells. Red blood cells carry oxygen from the lungs to ...

Medically reviewed by Sanja Jelic, MD A PaO2 test measures partial pressure of oxygen, or PaO2—the oxygen pressure in ...

The patient then presses a start button, and a tourniquet tightens around the patient’s arm, above the elbow, to make the blood draw easier. The Aletta then uses an infrared light to locate the ...

Leg pain and leg cramps aren’t always an orthopaedic issue: Both can be signs of peripheral artery disease (PAD), a serious blood flow issue with implications for the heart. In PAD, narrowed ...