G - Physics – 06 – M
Patent
G - Physics
06
M
340/124.1, 340/1
G06M 1/10 (2006.01) A61M 5/168 (2006.01)
Patent
CA 1111122
ABSTRACT This invention relates to improvements in methods and apparatus for measurement to drop flow in intravenous fluid flow control systems. While observation of the rate of drop flow via the drip chamber is a simple way of controlling the amount of liquid fed to a patient over a period of time, its ultimate effectiveness requires that a relatively constant vigil be maintained on the drop flow, lest it cease entirely due to exhaustion of the liquid supply or become a continuous stream and perhaps increase the rate of liquid introduction to the patient to a dangerous level. The present invention provides an improved electronic method and apparatus for evaluation to the quality of drop detection in parenteral administration of medi- cal fluids, wherein the waveforms of electrical signals repre- senting drop flow detection are evaluated for conformity with both prescribed amplitude and time duration characteristics. Separate counters record the total number of drop events eval- uated and the portion of the total which are determined to be non-conforming, and the latter counter triggers alarms if a predetermined limit is exceeded within a prescribed number of total events.
311879
Alaris Medical Systems Inc.
Gowling Lafleur Henderson Llp
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