May 11, 2006
Blood Tests and Insulin Injections
Question from Portage, Indiana, USA:
What happens if you forget to check for bubbles in the syringe before an injection?
Bubbles in the syringe are a concern because they affect the amount of insulin you are receiving. The air in the bubble takes the place of the insulin that is supposed to be there in the syringe. For example, a large bubble could take the place of two units of insulin so the dose you are getting is reduced by two units. This is even more important in children or people who are on small doses of insulin. If you tap/flick on the syringe, the bubbles will go together and rise to the top and then you can push them out and redraw up the insulin as needed. A very small bubble (pinpoint size) is not a problem.