The answer to this question depends on how you plan to use the base.
If you are using it internally, you are going to want to utilize the 'View' feature.
1. You should create one view for Patients w/ Operations and another view for Patients W/O Operations.
2. Using the filter button at the top of the page you can include records where the 'Single Select' (yes/no) is yes for the Operations and no for those without operations.
3. Finally, you'll want to use the 'Hide Fields' button to choose which fields are visible in the views. This will allow you to show certain fields in one view and keep those hidden in another view.
However, if you are hoping to have user's fill out a form on their own, you can use conditional logic buttons in the form settings. If you share some more context on the project, I may be able to advice further.
Hope this was a helpful start! Good luck