Patent ID: 8128616
Filing Date: 2012-03-06
Classification: A61M,G16H

Abstract:
1. A system for delivering a therapeutic substance at a flow rate to a patient, comprising: a reservoir for holding said therapeutic substance; a delivery path of a known volume operatively coupled to said reservoir and adapted to be operatively coupled to said patient; an adjustable metering device arranged along said delivery path capable of controlling a flow rate of said therapeutic substance to said patient; a controller operatively coupled to said adjustable metering device, said controller being configured to transition from delivery of a first therapeutic substance at a first flow rate to delivery of a second therapeutic substance at a second flow rate; said controller being configured to deliver said first therapeutic substance to said patient at a known flow rate, being configured to calculate a bridge duration equal to said known volume divided by said known flow rate; and being configured to control said adjustable metering device in order to control said flow rate following introduction of said second therapeutic substance into said reservoir such that: