Portable infusion device
First Claim
1. A portable infusion device which can be user operated almost anywhere for administration of a solution at a substantially steady flow rate from storage, the device comprising in combination a flow restrictor and a propulsion system using a pressure medium carried in a flexible extendible container surrounding the pressure medium and solution for causing the solution to be administered to a patient at a substantially steady rate of flow through the flow restrictor, the volume of the pressure medium being at least about five times the volume of the solution.
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Accused Products
Abstract
A portable infusion device which can be user operated almost anywhere for administration of a solution at a substantially steady flow rate from storage, the device comprising in combination a flow restrictor and a propulsion system using a pressure medium carried in a flexible extendible container for causing the solution to be administered to a patient at a substantially steady rate of flow through the flow restrictor.
139 Citations
17 Claims
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1. A portable infusion device which can be user operated almost anywhere for administration of a solution at a substantially steady flow rate from storage, the device comprising in combination a flow restrictor and a propulsion system using a pressure medium carried in a flexible extendible container surrounding the pressure medium and solution for causing the solution to be administered to a patient at a substantially steady rate of flow through the flow restrictor, the volume of the pressure medium being at least about five times the volume of the solution.
- 2. A portable infusion device for administration of a solution at a substantially steady flow rate from storage, the device comprising a flexible extendible housing enclosing a predetermined volume, the housing for receiving a reservoir (having an outlet) of the solution to be administered under pressure and a pressure bladder comprising a flexible extensible (extendible) container for carrying a pressure medium, the pressure bladder when pressurized being in intimate pressure contact in the housing with the reservoir, the volume of the pressure bladder when pressurized being at least about five times the volume of the reservoir.
- 4. A portable infusion device for administration of a solution at a substantially steady flow rate from storage, the device comprising a housing enclosing a predetermined volume, at least one opening through the housing into the volume, the housing of flexible and extendible material, a pressure bladder for being carried within the volume of the housing, the bladder being inflatable within the housing and comprising flexible extendible material, the bladder comprising an inlet for introducing the pressure medium into the bladder for inflating the bladder to a predetermined pressure, pressure release means in communication with the contents of the pressure bladder to ensure the predetermined pressure is maintained and excess pressure is released, the volume of the housing also for receiving a reservoir containing the solution to be administered, the reservoir being made of flexible material, an outlet from the reservoir for administering the solution, the outlet comprising a flow restrictor, the volume cf the bladder being at least about five times the volume of the reservoir.
Specification