1
Vernon R Natwick, Michael W Lawless, Joseph E Doll, Chung You C Wu: Detecting occlusion of proximal or distal lines of an IV pump. Abbott Laboratories, Christensen O Connor Johnson & Kindness, May 26, 1992: US05116203 (110 worldwide citation)

A method and apparatus for detecting proximal and distal occlusions of flexible tubing in a positive displacement pump. A volumetric pump (30) includes a motor (146) that rotatably drives a cam assembly (142). The rotating cam assembly actuates a plunger (48), causing it to compress a pumping portio ...


2
Vernon R Natwick, Michael W Lawless, Joseph E Doll, Chung You C Wu: Method for monitoring fluid flow from a volumetric pump. Abbott Laboratories, Christensen O Connor Johnson & Kindness, January 19, 1993: US05180287 (29 worldwide citation)

A method for determining if fluid is being displaced by a volumetric pump. The volumetric pump (30) includes an inlet cracking valve (46) and an outlet cracking valve (52) disposed on opposite sides of a plunger (48) used to displace fluid by compressing flexible tubing (34). During a pumping segmen ...