A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
341/38
A61M 5/168 (2006.01)
Patent
CA 1271541
ABSTRACT A flow controller is provided that detects intervals between successive drops and responds to detection of intervals which are too long by shutting down operation of the administration set if the abnormal flow causing the long interval cannot be corrected. In response to detection of abnormal flow which is not clearly a high flow condition and/or an empty container, the flow controller sequentially opens, closes, re-opens and again closes the clamp of the controller in an attempt to restore normal flow. If normal flow is restarted before the sequence is completed, the controller returns to normal control of the fluid flow. Otherwise, completion of the sequence results in a shutdown of the system and activation of an alarm. In keeping with the invention, indicia are provided in connection with the drop chambers of the administration sets which are sensed by sensing means mounted to the drop detector of the flow-controller in order to indicate to the controller the size of the orifice in the drop chamber. In addition, a plurality of drop sensors are provided which cooperate to provide a reliable drop signal for angles approaching 30 degrees from vertical. 39-125/cad
526886
Arndt Robert G.
Atkinson William
Carr Travis C.
D'souza Stanley
Haun Michael J.
Abbott Laboratories
Arndt Robert G.
Atkinson William
Carr Travis C.
D'souza Stanley
LandOfFree
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