The mean corpuscular hemoglobin concentration, a measure of the concentration of hemoglobin in a given volume of packed red blood cells. It is reported as part of a standard complete blood count.he mean corpuscular hemoglobin concentration, a measure of the concentration of hemoglobin in a given volume of packed red blood cells. It is reported as part of a standard complete blood count.
An enema is the administration of a substance in liquid form into the rectum. This may be performed to aid bowel evacuation or to administer medicines.
Types of enemas. Administering an enema involves instilling a solution into the rectum and the sigmoid colon to stimulate peristalsis and promote defecation. The most common reason for administering an enema is to relieve constipation.