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Method and apparatus for infiltration detection during administration of intravenous fluids

  • US 5,423,746 A
  • Filed: 05/24/1993
  • Issued: 06/13/1995
  • Est. Priority Date: 08/05/1991
  • Status: Expired due to Fees
First Claim
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1. An apparatus for detecting the presence of an obstruction or infiltration of a fluid being delivered through an intravenous tube to a patient, comprising:

  • occlusion means for occluding an intravenous tube at a first location;

    fluid moving means for subjecting the fluid downstream of said first location to a pressure drop below a first pressure level;

    pressure monitoring means in contact with an exterior surface of the tube for monitoring fluid pressure within the tube downstream of said first location;

    processing means in communication with said occlusion means, said fluid moving means, and said pressure monitoring means, for controlling said occlusion means to occlude the tube, for controlling said fluid moving means to subject the fluid to said pressure drop, for measuring a recovery time interval required for the pressure in the tube to recover to said first pressure level, and for comparing said recovery time interval with a predetermined time interval; and

    display means connected to said processing means for indicating the results of said comparison.

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