I'm a hard of hearing nurse! I wear biaural hearing aids and have an amplified stethoscope. No problems so far!

They had to work with me a bit in nursing school. When we were being checked off on blood pressures, the teachers used a dual head stethoscope to check off the students. Well, I couldn't hear using their stethoscope. So the lab just happened to have one of those Bionic Man type dummies... so they programmed in some blood pressures and then I took the blood pressure using my stethoscope. Got them all right.