Patent ID: 7449008
Filing Date: 2008-11-11
Classification: A61B,A61M

Abstract:
1. An apparatus comprising: a housing; a pumping mechanism in said housing; a fluid container coupled to said housing and activated by said pumping mechanism to pump a drug fluid, said drug fluid exiting at a dynamic exit fluid pressure, said fluid container including injection means for administering the drug fluid at an exit fluid pressure to a patient tissue type for receiving the drug fluid; a sensor arranged for determining said exit fluid pressure based on a measured parameter of at least one of said pumping mechanism and said fluid container; and a controller for receiving said dynamic exit fluid pressure and having at least one memory data bank and at least one microprocessor, said memory data bank storing a plurality of known interstitial fluid pressures corresponding to different patient tissue types, the memory data bank also storing the measured parameter, said microprocessor generating an output based on the measured parameter and the patient tissue type for receiving said drug fluid and for correlating said exit fluid pressure to one of said known interstitial fluid pressures.