Low Dose Accuracy in Neonatology

Low Dose Tip (LDT) syringe doesn’t ensure dose accuracy

Laboratory testing has shown inconclusive results:

• When following current common practice, the accuracy of the LDT syringe is equivalent to ENFit™ (1). It therefore poses the same risks as ENFit™ and is considered unacceptable for neonatology.

• When following the new protocols stipulated for the use of the LDT syringe, the accuracy is reported as acceptable(2). However, the creation of protocols specifically for one syringe introduces a new set of difficulties including the potential of human error and, with it, the risk of causing unintentional dosing errors.

Overdosing risk with ENFit, Low Dose Tip (LDT) and Nutrisafe2 syringes
*In ISO 80369-3:2016, results of laboratory testing are published and show a 0.148ml volume displacement for ENFit.
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Focus on the Low Dose Tip (LDT) syringe instructions for use

Click here to see the LDT syringe instructions.

Human errors inevitably happen

Human errors are inadvertent and unintentional, and they happen predictably with repeated acts because the person is on “automatic mode”. Unfortunately, medication errors also increase when there is a higher severity of illness and a higher level of care being given.

The addition of new and specific steps in the syringe workflow process, only during the use of the LDT syringe, will inevitably lead to errors due to:

  • distractions
  • increase in workload
  • “automatic mode” with common and familiar tasks

It’s unfortunate that, when “automatic errors” occur, they are often not immediately noticed due to the nature of the care giver being on “autopilot”. Education is successful in mitigating the risks and learning new protocols but after the training event the individual’s knowledge retention drops on the “forgetting curve“. In order to ensure continued compliance, this training must be continuous and sustainable especially as care givers are working in stressful situations.

Concerns that the LDT instructions could lead to overdose

  1. The use of a drawing-up device not only increases the hospital budget, it also doesn’t guarantee that the syringe moat is clear of fluid (See the use of a draw-up device video).
  2. Tapping or flicking the syringe to remove the excess fluid from the syringe moat results in droplets being dispersed and introduces the risk of chemical and microbial contamination of the operator and the dispensing area.
  3. Removing the fluid from the LDT syringe moat can be difficult, depending on the fluid viscosity.
  4. The wiping method to clear the syringe moat can be difficult to perform as the moat of the LDT syringe is thin and deep. Moreover, the towel used to wipe the syringe moat must ensure no contamination risk is introduced of particles or microorganisms
  5. If the LDT syringe instructions for use are used with another type of syringes (e.g. classic ENFit, intravenous Luer syringe, neuraxial syringe…), it would lead to underdosing errors for the clinical application.


  • (2)GEDSA ENFit® Low Dose Tip Review, Q2 2016