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.
There are two types of enemas: the high enema, given to cleanse the large bowel, and the low enema, to cleanse only the lower bowel. (Illustration by Electronic Illustrators Group.) enema, intended to cleanse only the lower bowel, is administered at lower pressure, using about 500 cc of fluid. Oil retention enemas serve to lubricate the rectum and lower bowel, and soften the stool. For adults, about 150-200 cc of oil is instilled, while in small children, 75-150 cc of oil is considered adequate.