07008403 is referenced by 50 patents and cites 31 patents.

A fluid dispensing system provides a non-contact method of monitoring the change in the fluid volume over time. This approach avoids the use of probes or sensors that come into direct contact with the fluid to be dispensed. The system comprises an apparatus comprising three chambers. The first chamber has a fixed volume and contains a pressurized gas. A solenoid valve is used to control the flow of gas from the first chamber into the second. The second chamber is sealed so that the combined mass of air in the first and second chambers remains fixed. The third chamber is adjacent to the second and contains medication in the form of incompressible fluid that is to be administered to a human or animal subject via a suitable delivery port. A piston is disposed between the second and third chambers and is movable responsive to the flow of gas into the second chamber to dispense fluid from the third chamber as desired. By sensing the pressure in the first and second chambers at any point in time, a processor is programmed to calculate the flow rate or dispensed volume of the fluid being delivered using principles derived from the Ideal Gas Law.

Infusion pump and method for use
Application Number
Publication Number
7008403 (B1)
Application Date
July 19, 2002
Publication Date
March 7, 2006
Scott Mallett
Coto de Caza
Greenberg Traurig
Peter Jon Gluck
Cognitive Ventures Corporation
A61M 37/00
View Original Source