Hello
Since you are a nurse and working in E R and E D so I am trying to mention in detail for your information.
Occupational transmission of
HIV :HEALTH & LABORATORY WORKERS.
There is a small , but definite , occupational risk of HIV transmission to health care workers and lab. personnel and potentially others who works with HIV containing materials , particularly when sharp objects are used.
Large multi-institutional studies have indicated that the risk of HIV transmission following skin puncture from a needle or a sharp object that was CONTAMINATED with blood from a person with documented HIV infection is less than 0.3% & after a
mucous membrane exposure it is 0.09%( in your case your thumb got
injury due to foil of vial or amp. so need not to worry ).
In your case in my opinion there is NO CHANCE of getting any HIV infection by you.
Further study , you can see in a test book "HARRISON'S "principles of internal medicine on page no 1081 16th edition chapter no 173 .
But you are HIV free according to your query.
Good luck .