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Aims. The aim of the study was to investigate the feasibility of cytological method in the diagnosis of paraimplant inflammation after primary total knee replacement. Materials and methods. Cytological punctate preparations and impression smears of para-articular tissue of the knee endoprosthesis area were studied in 20 patients with primary instability of the endoprosthesis components. Aseptic instability was found in 11 patients, and septic instability found in 9. The cell composition of fluid samples and impression smears were studied by counting of at least 100 cells in several fields of view using the immersion lens. Results. Cytogramme of the punctates of patients with aseptic instability of the knee joint characterised by the absence of cellular inflammation elements and fibrotic cells, single lymphocytes and synoviocytes were encountered in the impression smears. Two types of cytogrammes were found in patients with septic instability of the knee joint, characterised by changing ratios of the cellular inflammation elements and acute and subacute inflammation consistent with the picture. Conclusions. Cytological method is an available, highly effective study that can be used for examination of punctates and impression smears of para-articular tissues of knee endoprosthesis area.

THE ROLE OF CYTOLOGICAL METHOD IN THE DIAGNOSIS OF PARAIMPLANT INFLAMMATION AFTER PRIMARY TOTAL KNEE REPLACEMENT