I checked and advise the following. It is good to have the operation but first the following pujas need to be done:
- Liberate 1,000 animals
- Chi-lu puja
- Pacifying fire puja
- The Long-life Sutra needs to be read 60 times. Do self-initiation five times, once or twice a day at least, and do this as soon as possible.
Once the pujas are done, then it is good to have the operation.