Bubble detection system
Patent 5059171 Issued on October 22, 1991. Estimated Expiration Date: 
June 21, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 21, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3915155 Injection system Pressure responsive multiple input infusion system Automatic infiltration detection system and method Power infuser Infusion pump Infusion pump Patent #: 4919650 InventorsAssigneeApplicationNo. 541564 filed on 06/21/1990US Classes:604/67, Sensor controls pump, motor, or pressure driven means604/122Having means for eliminating and/or preventing injection of air into bodyExaminersPrimary: Yasko, John D.Attorney, Agent or FirmForeign Patent References
International ClassA61M 031/00AbstractA 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 bodyMaterial 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 | |
