Dr. Greg Donald Ewert M.D.

Lymphocytes are a type of white blood cell produced in the bone marrow. A few lymphocytes enter the bloodstream while some move into the lymphatic system. Having a low or high lymphocyte count can help identify a person's medical condition. Normal lymphocyte counts usually vary from one laboratory...

The ABO (A, B, AB, or O) blood group system is used to classify different types of antibodies in the plasma and antigens in the red blood cells (RBCs). The ABO blood group and RhD antigen determine the type of blood that is a perfect match for blood transfusions. The four ABO blood groups are: ...

Oliguria is a medical term used when referring to a decreased urine output. Oliguria is considered when a person’s urine output is less than 400 mL in a 24-hour period. When it comes to infants, oliguria occurs when the urine output is less than 0.5 mL/kg/hr for 24 hours. Anuria is the absence...

Hand sanitizer has alcohol, like ethyl alcohol, as the active ingredient to provide the antiseptic effect. In addition, it may also contain a variety of fragrances, glycerine, and water. Sanitizers containing alcohol are ideal for preventing most of the bacterial and viral infections. But these may...

Severe pain in the hip may make it hard to walk or climb the stairs. Issues with muscles, tendons, ligaments, and bones may all cause hip pain. Many diseases and conditions may also result in pain. Location of the pain in the hip often tells about the actual cause behind the pain.In some cases, the...

Many of us who sit for a long time in front of a computer, in a car while traveling to the workplace, relax in front of the television, or do online shopping, might be have sitting disease. Sitting disease is another name for a sedentary lifestyle, which increases the risk for a number of diseases.A...