This is a critical analysis of the first 200 of 450 consecutive knee arthroscopies performed with the Watanabe No. 21 arthroscope. It asks whether arthroscopy adds real value in managing the 'problem knee' compared with clinical assessment and arthrography. All cases had at least one year of follow-up.
When a referred knee defies diagnosis, direct inspection beats guessing: clinical assessment was wrong 31.5% of the time in this series.
The headline comparison is the one to remember. Arthroscopy carried a 4.7% error rate versus 31.8% for double-contrast arthrography, and produced zero meniscal false negatives. A normal meniscus at arthroscopy can be trusted, which is why the authors argue the tool should reduce removal of normal menisci to nil.
Just as important is what arthroscopy prevents. Deferring surgery in 96 initially operative candidates, with 44 improving on follow-up, reframes the scope as a way to avoid unnecessary arthrotomy, not just to confirm pathology. Know the limits too. The scope cannot assess the PCL, collateral ligaments, popliteal cysts, or posterior meniscal attachments, and it carries a genuine learning curve.
This paper sits at the start of the arc from diagnostic arthroscopy toward the operative arthroscopy that now defines sports knee surgery.
This is a critical analysis of the first 200 of 450 consecutive knee arthroscopies performed with the Watanabe No. 21 arthroscope. It asks whether arthroscopy adds real value in managing the 'problem knee' compared with clinical assessment and arthrography. All cases had at least one year of follow-up.
When a referred knee defies diagnosis, direct inspection beats guessing: clinical assessment was wrong 31.5% of the time in this series.
The headline comparison is the one to remember. Arthroscopy carried a 4.7% error rate versus 31.8% for double-contrast arthrography, and produced zero meniscal false negatives. A normal meniscus at arthroscopy can be trusted, which is why the authors argue the tool should reduce removal of normal menisci to nil.
Just as important is what arthroscopy prevents. Deferring surgery in 96 initially operative candidates, with 44 improving on follow-up, reframes the scope as a way to avoid unnecessary arthrotomy, not just to confirm pathology. Know the limits too. The scope cannot assess the PCL, collateral ligaments, popliteal cysts, or posterior meniscal attachments, and it carries a genuine learning curve.
This paper sits at the start of the arc from diagnostic arthroscopy toward the operative arthroscopy that now defines sports knee surgery.