Pressure responsive multiple input infusion system
Automatic infiltration detection system and method
Infusion pump Patent #: 4919650
ApplicationNo. 541564 filed on 06/21/1990
US Classes:604/67, Sensor controls pump, motor, or pressure driven means604/122Having means for eliminating and/or preventing injection of air into body
ExaminersPrimary: Yasko, John D.
Attorney, Agent or Firm
Foreign Patent References
International ClassA61M 031/00
AbstractA bubble detection system for use in a fluid delivery line leading to a patient for automatic delivery of a fluid. The system monitors a parameter indicative of compressibility of the fluid being delivered and compares that monitored parameter with a known value of the same parameter using a relatively incompressible fluid. If the fluid being delivered is more compressible by a predetermined amount, the system recognizes the existence of a bubble and stops the further movement of fluid toward the patient and reduces the pressure in the fluid delivery line upstream of the bubble to prevent the bubble from progressing further toward the patient. The parameter may include pressure in the fluid delivery line, force required to deliver the fluid or motor current in the event an electric motor is used in delivering the fluid.
Field of SearchHaving means for eliminating and/or preventing injection of air into body
Material flow varying means controlled by condition responsive sensor
Sensor responsive to body condition
Sensor controls pump, motor, or pressure driven means
Having means for varying, regulating, indicating, or limiting injection pressure or aspirating suction