Hello,
Thank you for your medical query at DoctorSpring.com
I understand your concern.
There is just a miniscule possibility, rather I will say more of a theoretical possibility of transmission of HIV from such an exposure. No such cases have ever been recorded from such an exposure.
Open wounds mostly constitute wounds more than 1-2 cms at least with a cut open surface, where you can see a granulation tissue inside.
So, you should not worry about HIV at all.
Feel free to discuss further,
Regards.