Is it permissible for a patient to undergo a non-emergency surgical operation during Ramadan, based on their request, which would cause them to break their fast?

If the operation is not an emergency and its delay does not harm the patient, then it is better to postpone it until after Ramadan so that he may fast the entire month. However, if the doctor determines that it is necessary and delaying it would endanger the patient, then there is no blame in performing it due to the existence of an excuse.