During our study given disorder was found in 2 patients with II and III Rg-stages of knee-joint osteoarthritis; these patients also had evident degenerative changes of hyaline cartilage of load-carrying surface of lateral femoral condyle. Both cases confirmed by diagnostic-treatment artroscopy.

Relatively high Bioplasm nls analyzer diagnostic significance in diagnostics of knee-joint osteoarthritis having both high sensitivity/specificity of method and wide range of registered pathological changes was revealed in the course of study. Manifestations of osteoarthrosis vary and in most cases they start developing not with bone changes detected by radiography. Changes of hyaline cartilage, small osteophytes are detected during Bioplasm nls analyzer and at pre-radiological stage of knee-joint osteoarthritis, simultaneously with clinical semiotics manifestation. Many manifestations, if not reversible, but quite effectively stabilized by modern therapeutic agents at this stage of disease. This approach greatly improves the clinical significance of nonlinear diagnostics in early detection of described signs of intra-articular degeneration. When using Bioplasm nls analyzer, structural changes of hyaline cartilage are detailed visible and determination of localization of its most evident structural changes becomes possible, which often shows primary cause of knee-joint osteoarthritis development, especially in case of apparent asymmetric affection of lateral and medial parts. Certain structural changes often occur in combination that promotes some characteristic symptom groups such as: combination of kneecap lateroposition, degenerative thinning of anterior surface of lateral femoral condyle, enthesopathy and calcification of the lateral parts of quadriceps tendon. Detection and presentation of acentric osteophytosis is both important at pre-radiological stage of knee-joint osteoarthritis and at later stages, because (as our research had shown) patellofemoral arthrosis becomes predominant in early stages; standard radiographic views show such arthrosis not sufficiently clear. Minor structure anomalies of knee joint, such as kneecap lateroposition, hypertrophy of fat body and alar folds, mediopatellar fold and etc., have important practical importance since they may contribute to osteoarthritis development (especially patellofemoral one) while menisci anomalies, discoid meniscus in particular, and also their degenerative changes cause predominance of dissymmetric tibiofemoral arthrosis.