Tests for vitamin levels are done with a blood sample taken from a vein. If the results show the patient is low in a ...

Adrenal-vein blood samples were collected in a heparinized tube, preferably by free drip from the catheter. After blood samples had been withdrawn, ...

Waikwanlai, CC BY Human blood is red because of the protein hemoglobin, which contains a red-colored compound called heme that’s crucial for carrying oxygen through your bloodstream.

Nearly 3 liters (2849 ml.) of antecubital-vein blood, collected in 144 samples, was examined . Fifty-seven (39.6 per cent) of these 20-ml. samples of peripheral blood contained 1 or more ...

Medically reviewed by Kashif J. Piracha, MD A magnesium blood test measures the amount of magnesium, an important mineral, in your blood. Your body needs magnesium from your diet to help your muscles, ...

Northwestern hopes the device allows it to ensure the quality of blood samples while dealing with an ongoing shortage of phlebotomists, said Dr. Gregory Retzinger, medical director of Pathology ...