A system and a method for detecting the presence of an occlusion in an intravenous (IV) line supplying a medicinal liquid to a patient. Two pressure occlusion sensors are employed to produce a value for the proximal and distal pressures within an IV pumping cassette that is disposed in the fluid path...http://www.google.com.au/patents/US5989222?utm_source=gb-gplus-sharePatent US5989222 - Pressure (occlusion) sensor
