The study is a prospective, multi-center, open label, randomized; two-arms cross over study.

This is the test protocol for the InsuPatch device, whose purpose is to improve insulin delivery into the blood when the insulin is infused using an insulin-infusion pump by controlled heating of the area surrounding the point of infusion.

Fifty five(55) type 1 IDDM subjects in three centers who use the MiniMed paradigm insulin pump, meeting the inclusion/exclusion criteria as outlined below and who provide written Informed Consent will be enrolled in the study.

The study will be done with subjects randomized into one of two procedure sequences. Each subject will undergo 3 procedures (two clamps with the InsuPatch and one clamp without the InsuPatch) and will thus serve as his/her own control. The same 55 subjects will be randomized into one sequence or the other. The order of the procedures will be selected randomly and will be performed both within one month.

There will be six Device visits starting with a screening and randomization visit, 3 clamps and a completion visit.

Inclusion Criteria:

1. Age between 18- 65 years old (including = 18 years and =65 years)
2. Gender: men and women
3. BMI: 18-35 kg/m2
4. Type 1 Insulin dependent diabetes using the MiniMed paradigm insulin pumps for at least six months and using insulin Lispro or Insulin Aspart.
5. Diabetic subjects with HbA1c values below 9.5% (including 9.5%).
6. Subject understands the study requirements and the treatment procedures and has signed an Informed Consent before any study-specific tests or procedures are performed
7. Subject is willing to comply with all specified follow-up evaluations -

Exclusion Criteria:

1. Pregnancy
2. Breast feeding women.
3. Alcohol addiction
4. Had CABG (Coronary Artery Bypass Graft), are Post MI (Myocardial Infarction) or had active Ischemic heart disease prior to the study date
5. Had CVA (cardiovascular accident) or TIA (transient ischemic accident) prior to the study
6. Suffer from uncontrolled Hypertension (blood pressure in mm HG >160 systolic or > 95 diastolic)
7. Low blood hemoglobin concentration <9 g/dL for female and <11g/dL for male.
8. Abnormal kidney and/ or liver function tests. (If any of the liver or kidney function test parameters are greater than 3 fold normal values.
9. Subjects with Hyperthyroidism or Hypothyroidism with TSH level outside the normal range, TSH>5.5 mIU/L or TSH<0.4 mIU/L
10. Psychological incompetence
11. Any other clinical condition or history, that seems to be relevant to the principle investigator to disqualify the participant.
12. Subjects with diminished skin integrity
13. Subjects with heat sensitivity
14. Subjects involved in or planed to participate in other studies
15. Subjects using other drugs therapies to control blood glucose level other than insulin.