Patent ID: 9597449
Date: 2017-03-21
CPC Classifications: A61M

Claim:
1. A method for delivering a therapeutic agent to a patient at a flow rate within a pre-determined range, the method comprising: providing a system for delivering a therapeutic agent solution to the patient, the system having a flow path for flow of the therapeutic agent solution to the patient, the flow path having a selected fluidic resistance, the system including a non-compliant housing containing an enclosed reservoir of therapeutic agent solution coupled to the flow path and a separate expandable balloon which engages the reservoir upon expansion, the expandable balloon having a first and second section separated by a releasable seal extending through the non-compliant housing to be engagable from outside the non-compliant housing, the sections containing a first and second chemical reactant, respectively, which mix to generate a gas and pressure within the expandable balloon upon releasing of the releasable seal, the gas pressure being applied from the expandable balloon to the enclosed therapeutic agent solution reservoir to drive the therapeutic agent solution from the reservoir through the flow path; wherein the generated pressure and the selected fluidic resistance are configured to deliver the therapeutic agent solution to the patient at the flow rate within the pre-determined range; engaging the releasable seal from outside the housing to unseparate the first and second sections, wherein the first and second chemical reactants mix and react to generate the gas and pressure for driving the therapeutic agent solution through the flow path; and using the system and the generated gas pressure to deliver the therapeutic agent solution to the patient at the flow rate within the pre-determined range.