I used to work with a nurse that was legally deaf and she functioned as a nurse. She did have a special stethoscope to hear with, amplified, and when she had questions, she would have another nurse double check a patient's lungs.
I believe you can overcome this type of disability and hopefully after surgery your sensation in your fingers will return. Don't forget that there are many different areas of nursing that can be practiced including MD offices, insurance companies, telephonic case management, education, etc. So don't let this derail your dream. Go for it!!!
Where you have been is just as valuable as where you are going.