Objective: to select optimal parameters of two-wave near-infrared laser irradiation for the arthroscopic treatment of chondromalacia foci in the articular cartilage. Material and methods. Bull articular cartilages were treated with laser light delivered by a fifi ber and having various parameters. Human articular cartilages with chondromalacia foci taken during the total knee replacement were also treated with laser light delivered by a fifi ber and having various parameters. The processed cartilage samples were examined macroscopically and then histologically. Changes in the structure of ar[1] ticular cartilage after laser irradiation were assessed. Results. A two-second irradiation with two-wave laser light (λ = 0.97 μm / 30 W and λ = 1.55 μm / 15 W) causes a rapid “melting” of lesion margins without macroscopically visible carbonization with a wide thermally affected zone in the irradiated area. Histologically, cartilage preparations irradiated with two-wave laser light (wavelengths λ = 1.55 μm / 5 W and λ = 0.97 μm / 3 W) for 2 sec demonstrated slight changes in the cartilage structure without thermal destruction of chondrocytes.Conclusion. The optimal combination for laser irradiation of the cartilage tissue in the saline solution environment which restores articular cartilage shape is two-wave laser light λ = 0.97 μm at power of 3 W and λ = 1.55 μm at power of 5 W from the distance of 1–2 mm under 2 sec exposure.
Background: The treatment of patients with chronic synovitis of the knee joint is a challenge faced by many doctors all around the world. Treatment of this pathology is often a difficult task.
Aim. The aim of the study was improving the results of treatment of patients with chronic synovitis of the knee joint by applying two wavelengths of radiation.
Material and methods. The treatment results of 50 patients with chronic synovitis of the knee joint aged 23 to 67 years with stage II-IV osteoarthritis according to the Kellgren-Lawrence classification were analyzed. All patients underwent arthroscopic sanation, partial laser synovectomy using LSP-IRE-Polus apparatus, wavelength 0,97 microns in pulse-periodic mode (pulse 100 ms, pause 50 ms) with power 5 W and wavelength 1,56 microns in continuous mode with power 5 W. Morphological examination of the synovial membrane and capsule was performed. Preoperative, 3, 6 and 12 month postoperative questionnaires were administered using the following scales and questionnaires: VAS, Leken index, WOMAC and KOOS.
Results. Mean age (M) was 45.32±131, BMI 28.63±4.72kg/m2, duration of synovitis 2.26±1.91 years. A statistically significant improvement on the VAS, WOMAC, Leken, KOOS scales was noted by the 3rd month of postoperative follow-up. By the 6th month postoperatively, the results had further improved. The achieved results were preserved up to 12 months after surgery (P <0.05).
Conclusion. The results suggest that the proposed technique may be introduced into clinical practice.
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