EXTRAVASATION DETECTION APPARATUS AND METHODS

摘要

Described herein is an extravasation tester that pinches an infusion line closed between a wheel and a platen, and then peristaltically withdraws fluid into the infusion line as the wheel is rolled away from a puncture site. Extravasation is determined to have occurred if little or no blood appears in a sight chamber positioned near the puncture site when a test fluid is withdrawn into the infusion line from the puncture site.

主权项

1. An extravasation tester, comprising:
a frame having a hollow bore for receiving an intravenous infusion delivery tube; a platen on an inner surface of the hollow bore; a manually rotatable wheel having a circumferential outer surface and opposing axial posts; and opposing slots in the frame for receiving the opposing axial posts of the wheel so that the wheel is rotatable about its axis and translatable along the slots in the frame; wherein the slots and the surfaces of the hollow bore are configured so that:
(a) when the wheel is in a free-flow region of the frame, the outer surface of the wheel does not pinch the delivery tube closed against the platen,(b) when the wheel is in a tube-pinching region of the frame, the outer surface of the wheel pinches the delivery tube closed against the platen, and(c) when the wheel is rolled on the delivery tube in the tube-pinching region of the frame, the point of tube closure moves along the delivery tube with the wheel.