Final answer:
A "fleet" enema refers to a commercially-prepared, disposable enema product, primarily containing sodium phosphates for relieving constipation or for bowel cleansing before medical examinations.
Step-by-step explanation:
If an enema is referred to as a "fleet" enema, it typically means that it is a commercially-prepared, disposable enema which contains a solution that is designed to be a laxative. This solution commonly consists of sodium phosphates and is used to relieve occasional constipation or to cleanse the bowel before rectal examinations such as sigmoidoscopy or colonoscopy. The term 'fleet' is actually a brand name that has become synonymous with the general product, much like 'kleenex' is often used to refer to all facial tissues.
Fleet enemas are known for their quick action, generally producing a bowel movement within 1 to 5 minutes of application. The convenience and speed of a fleet enema make it a popular choice in clinical settings as well as for at-home use when fast relief from constipation is needed or a bowel cleanse is required.