An apparatus for supplying a fluid to a body of a patient and for monitoring a body characteristic of the patient has a base (100) adapted to secure the apparatus to the skin of a patient a first piercing member (130) coupled to and extending from the base (100), wherein the first piercing member (130) is operatively coupled to at least one cannula for infusing a fluid to an infusion site a second piercing member (120) coupled to and extending from the base (100) and operatively coupled to an electrochemical sensor having a sensor electrode (104) for determining at least one body characteristic of the patient at a sensor placement site and infusion set tubing (160) adapted to connect to the cannula. The first and second piercing members (130, 120) are coupled to the base (100) in an orientation such that when the first and second piercing members are operatively coupled to the base and inserted into a patient, a first perforation channel made by the first piercing member is not in contact with a second perforation channel made by the second piercing member and the first piercing member consists of two or more needles coupled to two or more infusion cannulae.
