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Intravenous fluid delivery system with air elimination

  • US 5,211,201 A
  • Filed: 11/15/1991
  • Issued: 05/18/1993
  • Est. Priority Date: 03/04/1986
  • Status: Expired due to Term
First Claim
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1. An air elimination system, for an intravenous fluid delivery system for intravenous injection of fluid into a patient, comprising:

  • an intravenous line;

    separation means for permitting the separation of air from the fluid;

    air-detection means, disposed in the intravenous line, for detecting air in the fluid, and emitting a fault-condition signal;

    a return line connecting the separation means to a point in the intravenous line downstream of the air-detection means;

    valve means, disposed in the intravenous line and return line, for permitting (i) flow through the return line or (ii) to the patient;

    pump means for urging fluid through the return line upon activation; and

    control means, in communication with the air-detection means, for (i) setting the valve means to permit flow through the return line and activating the pump means, so as to move air and fluid from the air-detection means to the separation means, in response to a fault-condition signal, and otherwise (ii) setting the valve means to permit flow to the patient.

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