I viewed my arthroscopic knee operation for a meniscus tear in 2000 as very routine. My Dr is an excellent surgeon. My surgery and recovery went very well without complications. The results were excellent.
Unfortunately, since my surgery in 2000 I have had 3 friends that had surgery complications following knee arthroscopy: 1) one with blood clots that resolved after a brief hospitalization, 2) one with blood clots followed by much more serious complications, 3) one with serious complications with hospitalization, maybe a blood clot issue but I don't know.
Searched - incidence complications knee arthroscopy
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For myself, I will look to avoid surgery but would do it with good reason.
Sorry for the downer view Raul_SJ.