Cartridge-type programmable ambulatory infusion pump.

摘要

A cartridge fed infusion pump (10) containing a plurality of linear peristaltic pumps. Each pump is powered by a direct current motor (54). The motor has a shaft (56) which rotates to perform a pump cycle. A position encoder (58) mounted on the shaft is used to determine when the shaft has reached the stop position in the pump cycle. A reverse pulse is used to quickly stop the motor shaft. The pump is further fed with an infusion pump cartridge (20) having a fluid source (68) portion and a pump interface portion (66). A clamp is provided in the pump interface portion. The clamp includes a bar (97) extending beneath the cartridge across the pump tubes to rigidify the cartridge and hold the tubes a fixed distance from the infusion pump when the clamp is locked. A pump tube mount is provided for insertion into the cartridge. The pump tube mount includes a uniquely shaped front wall (84) and a rear wall (88) which extends downward in order to butt up against a ledge (75). Tabs (90) extend from the rear wall in order to snap into an opening beneath the ledge. A compressible tube (22) is mounted in the tube mount by providing a cylindrical fitting (98) having an indentation (100). The tube may be held in the indentation by a collar (102) surrounding the tube in alignment with the indentation.