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A parenteral administration system, utilizing a syringe pump operated by a motor to repetitively fill and empty a disposable syringe cartridge over a plurality of operational cycles of successive fill and pump stroke periods. The syringe cartridge has no valves, and the apparatus repetitively and se

A parenteral administration system, utilizing a syringe pump operated by a motor to repetitively fill and empty a disposable syringe cartridge over a plurality of operational cycles of successive fill and pump stroke periods. The syringe cartridge has no valves, and the apparatus repetitively and sequentially opens and closes, by means of an external pair of tube pinchers, a pair of intake and output I.V. tubes communicating with the inlet and outlet nipples. The disposable syringe cartridge includes a molded plastic cylinder having inlet and outlet nipples, a plastic piston and piston rod, and a rubber sealing cap defining a conical piston face, a pair of piston sealing rings and a sealing boot. The pair of sealing rings enhance axial alignment and stability, while the sealing boot prevents air or bacterial intake through the bottom of the cylinder during repetitive strokes. The plastic cross-sections are selected to provide maximum strength for minimum material employed. The interior cylinder chamber is sloped to drive out gas through the outlet nipple. An integral tab on the cylinder provides an operator handle for mounting and removing the syringe. One end of the piston rod is cut away and provided with mounting bosses, adapted to engage and be retained by a cooperating drive system mounting shoe so that the syringe can be inserted in the shoe horizontally, be rotated to a vertical position, and engage fixed guide and retaining slots by means of a pair of integral bosses projecting from the syringe cylinder.

대표청구항 ▼

For use in a syringe pump having a housing and a syringe mounting, a syringe, comprising: a hollow cylinder having an open end and a closed end, said cylinder being adapted for normal use with its longitudinal axis substantially vertical, said cylinder having a pair of integral, parallel inlet and o

For use in a syringe pump having a housing and a syringe mounting, a syringe, comprising: a hollow cylinder having an open end and a closed end, said cylinder being adapted for normal use with its longitudinal axis substantially vertical, said cylinder having a pair of integral, parallel inlet and outlet nipples projecting from said closed end of said cylinder, said nipples being disposed on opposite sides of said cylinder with the axes of said nipples being substantially parallel to said longitudinal axis of said cylinder, there being no valves within said nipples, the uppermost interior surface of said cylinder being sloped upwardly in a single plane, said outlet nipple being located adjacent the highest point within said cylinder; a piston head with said cylinder; and a piston rod connected to said piston head and integral therewith for reciprocating said piston head along said longitudinal axis of said cylinder.