Risk of Auto-Injector Hitting Infant’s Bone? Allergist Shows His Technique

in Basics, Food Allergy, Managing Allergies
Published: October 19, 2017

Canadian allergist Dr. Harold Kim and a team at the University of Western Ontario presented research in 2016 that suggested the needle length of epinephrine auto-injectors may need adjustment for young children.

Using ultrasound technology, they simulated use of an auto-injector on 53 infants, weighing less than 33 pounds (15 kg), and assessed the impact. The researchers found that for young patients of this size, the needle inside pediatric auto-injectors needs to be shortened to avoid striking the bone.

The team modeled the study on the Auvi-Q auto-injector, but Kim said it’s his view that they’d get similar results using an EpiPen Jr.

Needle Workaround

We caught up with Kim at The Canadian Society of Allergy and Clinical Immunology conference in Toronto in October 2017. There, he showed us (see video) the workaround he suggests to avoid hitting the bone in a lower-weight child when using an auto-injector.

  • Squeeze the child’s outer thigh (vastus lateralis) muscle, so that when you inject, the muscle doesn’t compress.
  • Just be careful not to hit your own finger with the auto-injector.

Related Reads:

All About Epinephrine: What It Does in a Reaction, How Long It Lasts, When It Gets Hot or Cold
FDA Approves Epinephrine Auto-Injector Designed for Babies, Small Kids