Some even say they are painfee. From postings in misc.health.diabetes by users of jet injectors, and discussions with a few users of jet injectors, the fact is that it depends upon the individual. People with some body fat, who inject in that area, will likely find that the jet injector is nearly painless. The GentleJet is one jet injector specifically designed with kids in mind. Also, each user must determine the proper injection pressure by trying out various settings.
Bruises result from too much pressure, while leakage results from too little.
Getting it just right is part of the training provided by the jet injector manufacturer and will be a bit uncomfortable. Different parts of the body may require different pressure settings. Potential Benefits Jet injectors probably provide greater precision in the amount of insulin injected. Studies have shown that the dosage of insulin delivered via syringe can vary greatly from the intended amount. It is easy to draw up a precise amount of insulin into a jet injector.