A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/91
A61M 31/00 (2006.01) A61M 5/142 (2006.01) A61M 5/168 (2006.01)
Patent
CA 1258212
DUAL MODE I.V. INFUSION DEVICE WITH DISTAL SENSOR ABSTRACT OF THE INVENTION An improved dual mode peristaltic device is provided for infusing I.V. solutions to a patient through an I.V. tube. In a first mode of operation, the device functions as a peris- taltic pump and in the second mode of operation it functions like a controller. Included in the device and associated with the I.V. tube is a pressure sensing strain gauge assembly that moni- tors dimensional changes in the outer diameter of the I.V. tube as an indication of fluid pressure changes in the tube. The strain gauge assembly is positioned relative to the device's peristaltic means to alternately monitor fluid pressure in a patent I.V. tube upstream and downstream from the gauge assembly. A pair of stationary fingers surround the strain gauge assembly to isolate it from the pulsitile nature of the peristaltic action of the device. In the first mode (pump mode), the device is programmed to alarm and cease operation when fluid pressure down- stream from the gauge assembly reaches a preselected value. In the second mode (controller mode), the device is programmed to alarm and cease operation when there is no differential between fluid pressure upstream and downstream from the gauge assembly.
521358
Borden Ladner Gervais Llp
Cardinal Health 303 Inc.
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