Many find these to be an accurate, precise and flexible insulin delivery system that helps them maintain excellent glucose control. External insulin pumps consist of a reservoir for insulin, a small battery-operated pump and a computer chip that controls insulin delivery, all in a case about the size of a deck of cards. It is connected to narrow, flexible plastic tubing that ends with a needle inserted just under the skin near the abdomen. This infusion set is changed every few days. The insulin pump weighs about 3 ounces and can be worn on a belt or in a pocket.
Pumps are either waterproof or water-resistant with a waterproof cover.
Users can set the pump to give a steady trickle or 'basal' amount of insulin continuously throughout the day. Most pumps have the option for setting several rates. Pumps release bolus doses of insulin at meals and at times when blood sugar is too high, based on the user's programming. Studies have shown that pump therapy can improve glucose control, particularly for those seeking tight control. If you use an insulin pump, it's really important to monitor your blood sugar frequently so you can determine the right dose and also to be sure that the insulin is being delivered.