welcome to HealthcareMagic
The type of operation you need to go for in your aunts case can be decided by your doctor by keeping in mind few things:-
-the size of hernia
-whether it will be just a repair of hernia or she will require mesh (net) to be put to correct the hernia.
-her general physical condition or if she has blood pressure or diabetes
These are few things the operating surgeon will consider & then he will advise the type of surgery you can go for.So it is a better option to discuss in detail with the operating doctor ;he will be the better person to decide.
Hope this is helpful to you.