Injecting Insulin Properly

24th September,2021


Insulin injecting technique is very important. Insulin is effective only if administered properly.

injecting insulin with insulin pen
  • Usual site of injection is the abdomen. Other sites where injection may be given like outer thigh, back of the arms, flanks and buttocks region.
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  • The needle should be inserted at 90 degree angle to the skin and held in place for 5-10 seconds then pull out to prevent leakage of insulin. Insulin injection is given in subcutaneous fat to delay its absorption and slow release. With long needles, injection can be given at 45 degree to skin to avoid injecting in muscle accidentally. Shallow injections in the skin (intradermal) are painful and cause redness in injection site.
  • Rotation of injection site is important. Shift in a circle always 1-2 cm away from previous injection site. Repeated injections at the same site causes lipohypertrophy or scar formation which forms depot, inhibiting absorption of insulin, resulting in random release of insulin which causes early post meal hyperglycemia and delayed hypoglycemia.
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  • Inject 2 inches away from the navel as the blood supply is richer at that area.
  • While using insulin pen, prime the pen before injecting insulin. Priming consists of drawing up 1-2 units of insulin and injecting into the air to fill up the needle or flicking the pen to remove air bubbles.
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