Situation: IM Phenergan injection in the deltoid of obese patient resulting in an immediate, small localized knot at injection site. I don't know the specifics of the needle size and method used.
Question: What causes this? Is it just something that just happens sometimes or is it an operator error? I was thinking maybe it ended up being SQ because the pt was obese and the needle was too short. Or maybe it was pushed too quickly?
Any input is greatly appreciated. I am a relatively new nurse. I had a patient ask me about this and besides not having an answer........ I of course became paranoid that I may do the same thing.