Patent ID: 8512244

Claim:
A method, comprising: positioning a portion of a first cannula under the skin of a patient for establishing a first fluid pathway for delivery of a therapeutic agent to within the patient; delivering the therapeutic agent to within the patient through the first cannula; positioning a portion of a sensor under the skin of the patient; automatically connecting a second cannula to a port of a fluid reservoir; automatically positioning a portion of the second cannula under the skin of a patient for establishing a second fluid pathway for delivery of the therapeutic agent to within the patient, the second cannula being wholly retained within a housing before the portion of the second cannula is automatically positioned under the skin of the patient; delivering the therapeutic agent to within the patient through the second cannula; and automatically retracting the first cannula into the housing while retaining the sensor position under the skin of the patient; wherein the withdrawing of the first cannula from the patient and the positioning the portion of the second cannula are performed such that delivery of the therapeutic agent to within the patient is continuous and uninterrupted while the first cannula is withdrawn and the second cannula is positioned.