No, this has to do with prices and values. If you're getting a higher quality of surgery for the same price as before, the cost of a surgery has effectively gone down.
You’re 100% wrong here and very loud about how wrong you are. Why? Why are you so vocal about something you’re not educated about (economics)?
Here's another example that you might be more familiar with : let's say that year N there is a specific laptop available for sale for $1200. Year N+3 you can still find for sale that laptop which still costs $1200 but which has improved guts and is twice as fast as before. Has the price of laptops stayed the same or gone down ? From the point of view of CPI calculation, it has gone down.