Duration of Infusion Set Function: Quick-Set Teflon Catheter Versus Sure-T Steel Infusion Set Catheter

Inclusion Criteria:

* Clinical diagnosis of type 1 diabetes for at least one year and using an insulin pump for at least 3 months
* The diagnosis of type 1 diabetes is based on the investigator's judgment; C peptide level and antibody determinations are not needed.
* Age 12 to 45 years
* For females, not currently known to be pregnant
* An understanding of and willingness to follow the protocol and sign the informed consent
* Hemoglobin A1c level less than or equal to 10%
* Medtronic Continuous subcutaneous insulin infusion pump
* Must be able to understand spoken or written English

Exclusion Criteria:

* Diabetic ketoacidosis in the past 6 months
* Severe hypoglycemia resulting in seizure or loss of consciousness in the 6 months prior to enrollment
* Current treatment for a seizure disorder
* Cystic fibrosis
* Active infection
* A known medical condition that in the judgment of the investigator might interfere with the completion of the protocol such as the following examples:
* Inpatient psychiatric treatment in the past 6 months for either the subject or the subject's primary care giver (i.e., parent or guardian)
* Presence of a known adrenal disorder
* If on antihypertensive, thyroid, anti-depressant or lipid lowering medication, lack of stability on the medication for the past 2 months prior to enrollment in the study
* Abuse of alcohol