Syringe infusion pump with absolute piston displacement control

Jian Wern Ong, Dwayne Chung Kim Chung, Eric Shen Lin, Hassan Ali Abid, Oi Wah Liew, Tuck Wah Ng

Research output: Contribution to journalArticleOtherpeer-review

5 Citations (Scopus)


A vast majority of syringe pumps operate on stepper motors, which limits their effectiveness for precision fluid delivery using estimation algorithms. Such a system also hampers the ability to ascertain if the infusion or aspiration instruction has been correctly carried out in the event of power interruptions. To address this issue, a linear servo based actuator system is described to provide absolute indications of the plunger position. System performance in terms of linearity and reliability of plunger translation were verified using a camera tracking system with syringe capacities ranging from 3 to 50 ml and at syringe plunger speeds ranging from 1 to 6.6 mm/s when distilled water was used as the medium. In investigations involving more viscous liquids, the system revealed similarly linear characteristics with 50% glycerol-water (v/v), but cyclical stick-slip behavior with Freund's adjuvant.

Original languageEnglish
Article number076108
Number of pages3
JournalReview of Scientific Instruments
Issue number7
Publication statusPublished - Jul 2019

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