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Apparatus for controlling the flow of intravenous fluid to a patient Patent #: 4300552
ApplicationNo. 06/254304 filed on 04/15/1981
US Classes:604/65, Material flow varying means controlled by condition responsive sensor222/58By the weight of the material in the supply container
ExaminersPrimary: Howell, Kyle L.
Assistant: Reichle, K. M.
Attorney, Agent or Firm
International ClassesG05D 7/06 (20060101)
A61M 5/168 (20060101)
AbstractIn a fluid flow control system a weight detector generates a signal representative of the weight of the fluid in the reservoir. A second signal is generated indicative of the desired fluid weight over time, and a first comparator produces an output indicative of the dissimilarity of the two signals. A programmed drop rate signal is modified by the first comparator's output to produce a desired drop rate signal. A drop detector produces a signal indicative of the actual drop rate. A second comparator is operative upon the desired drop rate signal and the actual drop rate signal to produce an output for operating the flow controller.