Good Afternoon Sharon and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
If the ear drum is ruptured, this is the thin membrane that separates the outer ear from the middle and inner ear, this will allow infection to enter the middle ear and possibly the inner ear. The treatment for this is an ear flush using antibiotics under anesthesia along with the oral and/or injectable antibiotics to guard against infection. The ear drum, Sharon, will eventually heal on its own but without this more invasive approach, this infection could cause hearing loss.
My only surprise, Sharon, is that your vet is not able to do this procedure...it is done in many general practice veterinary hospitals but your vet may not be comfortable with this procedure.
This LINK will explain in more detail.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, ***** *****