Back to Syringes and Injection Products Jet Injectors
Image of a GentleJet Injector


Jet injectors deliver insulin beneath the skin using a high pressure jet through a tiny opening at the head of the injector. The opening is typically a fraction of the diameter of a needle. Proponents of jet injectors argue that the mist produced by the jet injector results in a better dispersal pattern of the insulin beneath the skin and is therefore less traumatic. Some also claim that jet injectors are less painful than needles.

Dispersal Patterns

Insulin deposited via needle

Needle Pattern

Insulin injected via a needle produces a pool of insulin beneath the skin, as shown in the first image. The insulin is absorbed by the body only on the periphery of the pool of insulin.
Insulin deposited via jet injector

Jet Injector Pattern

Insulin injected via a jet injector produces a mist of insulin beneath the skin, as shown in the second image. Since the insulin is dispersed throughout the tissue, it is absorbed more quickly. Users of jet injectors often need to adjust their insulin dosage by a small amount to account for this effect.


Proponents of jet injectors often claim that they are less painful than needles. Some even say they are painfee. From postings in 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 little body fat or thin skin, such as kids, are likely to find jet injectors and needles equally painful (or painfree). 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

Potential Negatives

If you are interested in jet injectors, your Diabetes Team can help you decide if they're right for you.

Makers and Models of Jet Injectors

Maker Models Comments
Medi-Ject Corporation
1840 Berkshire Lane
Minneapolis, MN 55441
Medi-Jector EZ
US$ 595
Dosage 2 - 50 units
15 pressure settings
Video tape training
Activa Brand Products Inc.
36 4th Street
Charlottetown, PEI C1E 2B3
AdvantaJet ES for people with tougher skin
[RECOMMENDED!] GentleJet for children

All models US$495

Dosage 0.5 - 50 units
12 pressure settings
RN/LPN trains you in person
30 day money back guarantee
Vitajet Corporation
27071 Cabot Road
Suite 110
Laguna Hills, CA 92653
Vitajet 3
Dosage 2 - 50 units
12 pressure settings
Video tape training
30 day full money back guarantee
Does not require any cleaning or disinfecting since it utilizes disposable tips

For More Information

Updated June 1, 2002

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