Medically reviewed by Anju Goel, MD A mean platelet volume (MPV) test measures the average size of platelets in your blood. Platelets are blood cells that your bone marrow makes. Healthy platelets ...

Modern blood testing is the foundation of clinical screening and decision-making. Timely disease diagnosis, prevention and chronic care management depend on accurate diagnostic testing. More than ...

Phlebotomy is the drawing of blood. A phlebotomist is someone with special training to do so. However, in many countries, other healthcare professionals can also draw blood (e.g., doctors, nurses ...

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 After blood samples had been withdrawn, ...

Blood can also be drawn from veins in the wrists, fingers or heels. A tourniquet may be applied to restrict blood flow and make the chosen vein puff out. Read more: Why do I bruise so easily?

A lab tech will take a sample of your blood-- usually from a vein in your arm. They'll tie a band around the upper part of your arm to make your vein fill with blood and swell up.

In a lab, your blood samples will get mixed with a special material called a culture. It helps bacteria or yeast grow if they are already in your blood. You may be able to get early results within ...

Blood sample collection in lizards is an important technique. This column describes techniques for sample collection from the ventral coccygeal vein and the ventral abdominal vein.