Implantable insulin pump

An implantable insulin pump system, comprising:

• a subcutaneous implantable infusion pump comprising a reservoir of medication having an output tube, responsive to instructions to deliver a dose of a determined volume of the medication at a defined time;
• a portal vein access catheter comprising:
• a catheter body having a proximal end, a distal end, a main lumen, wherein said main lumen extends from said proximal end to said distal end, and a balloon-fill lumen, wherein said balloon-fill lumen extends from a balloon-fill hub to an anchor balloon wherein said anchor balloon is insertable into a portal vein and inflatable to engage said portal vein and prevent dislodgement,
• a subcutaneous connection hub at said proximal end comprising an input port connected to said reservoir output tube and said balloon-fill hub, and
• a connector that interfaces said main lumen to said input port and said balloon-fill lumen to said balloon-fill hub;
• a glucose measurement device configured to perform at least one measurement that is correlated with a patient's blood glucose levels;
• a control unit operatively coupled to the infusion pump and the glucose measurement device, wherein the control unit is configured to determine the dosage of the medication to be delivered to the patient and determine a defined time of delivery of the dose via the pump into the portal vein of the patient.