| 摘要 |
Apparatus for fluid flow control in 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 of the syringe cartridge. A reference light source and photoelectric sensor is provided to sense the physical presence of the syringe cartridge, and an appropriate electrical signal is generated whenever the reference light beam is interrupted by one of the syringe nipples, to thereby indicate proper installation of the syringe cartridge for control over pump operation, while another reference light source and photoelectric sensor is provided adjacent one of the syringe nipples as a bubble detector to insure that all of the air has been removed from the syringe and to prevent air delivery to the patient.
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