A stoma is an artificial bowel outlet at the abdominal wall which has to be surgically created due to diseases. A distinction is made between colostoma (drainage of the large intestine), ileostoma (drainage of the small intestine) and urostoma (drainage of the urine).
Since the stoma has no sphincter muscle, stool or urine flow out uncontrolled. The excretion can be collected in a bag or initially retained with a cap. The term stoma care refers to the application of base plates, stoma bags, stoma caps and also cleaning. How often the ostomy care should be changed depends on the quantity and consistency of the excreta.