Faulty Design Created Inherent Risk – Part 4

Jet Injectors = Jet Infectors

January 17, 2016

Suria and colleagues (1999) investigated a multiple-use nozzle jet injector, known as the Syrijet, made from the same manufacturer as the Ped-O-Jet. This in vitro study assessed the transference of microbial pathogens among patients and whether skin cells could contaminate the internal components of the Syrijet during the injection process. Results found the jet injector nozzle became contaminated after being in contact with a contaminated injection surface. Moreover, due to the retrograde flow (i.e., Backwards flow) of the injection process contaminates had entered the internal components of the jet injector. The study found the larger the ejection volume the greater the internal components were contaminated. Suria concluded, “Although autoclaving is the only way to ensure sterilization of this device, frequent cleaning of the ejection surface during clinical use minimizes the risk of cross-patient bacterial transfer.” Although Suria also warns swabbing the nozzle of the jet injector does not remove the internal contamination.

Faulty Design Created Inherent Risk – Part 5


  • (Suria et al., 1999) Suria H, Van Enk R, Gordon R, Mattano LA Jr. Risk of cross-patient infection with clinical use of a needleless injector device. Am J Infect Control. 1999 Oct; 27(5):444-7).

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