Hello, thankyou for approaching DoctorSpring with your query.
My advise to you would be to inform the patients MD. As the patient is a diabetic patient she is prone for infection. In addition she is already in a compromised state where her immunity is lowered even further.
Any contaminant that could have been transferred onto the needle can inoculate in the patient subcutaneously and result in an abscess. By informing the MD it will be easier to for him to take precautionary measures in treating the patient.
Even if you would have followed the guidelines and washed your hands thoroughly and used an alcohol based hand disinfectant before administering the injection, there are still chances of contamination being there.
And hence I would say inform the MD.
I hope this has helped you. For an futher queries please feel free to follow up.
Thankyou

Hello,

Thank you for the followup. I discussed this scenario during our routine case discussion. Interestingly most of our Doctors think that there is not much risk. Even though this is contradicting my first answer, I though I should mention this here.
Unless you are HIV, Hepatitis B or C positive or have an active infection in the part of your body where the needle touched, the risk is only "technical" and no need to worry about this.

Notifying the MD would be optional ( * mandatory if you have HIV, Hep B or C) positivity ). Even if you inform this to there MD no actionable plans can be taken, other than observation. This will only add to confusion. And these incidents are not rare in patients who are taking self injections/daily injections. But most of the times there is no additional risk.

I do understand this reply is contradicting my first reply. Apologies for that. While my first reply is a text book reply, this is more practical and collective opinion.

Hope this helps
Feel free to ask followups
Thank you

Dr.DSS
Dr.SM
Dr.VV