INFUSION DEVICE FOR INFUSING MULTIPLE MEDICAMENTS AT DIFFERENT SPEEDS AND METHOD

摘要

An infusion device comprises a pump having first and second chambers that are sealed by a penetrable membrane; an injection catheter comprises a first passageway which is connected to the first chamber; and an expandable elastic pouch which is mounted to the injection catheter and is connected to the second chamber through inlet holes defined in a wall of the second passageway. The expandable elastic pouch further connects an outlet port of the injection catheter through some outlet holes which are also defined in the wall. Medicaments are filled into the chambers and can either be directly injected through to the first passageway, or transmitted to the elastic pouch. The elastic pouch is expanded, and accordingly, a pressure is induced on the medicament to effectively continuous deliver the medicament for a given period of time.