Knee pain & swelling. Me your opinion!

I am asking this for my brother in law he recently diagnosed with acute right knee synovitis with chondral flap tear & raised inflammatory markers & very low vit D His test shows following details: CRP 45 with ESR 31 & raised asotire indicating acute inflammation possibly as a result of strep infection in the blood 2: synovitis on the MRI scan with a significant chondral flap tear at the back of the knee cap (patella chondral flap tear) there is no meniscal tear 3: severely low vit D which is undetectable The treatment they have started is: Continue with ice compression & anti inflammatory to deduce right knee swelling & has given 300,000 units of vit D IM for vit D deficiency . The doctor is saying that there is an acute inflammation that is not settling ( the aspirate shows significant white cells three plus) but no sign of organism. If this doesn't improve he will require an arthroscopic debridement, synovial biopsy, & chondral flap shaving . Please give me your opinion