[Determination of ammonia in the blood (Automatic method using dialysis)].
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The best assessment tests for long term trials on osteoarthritis (OA) of the hip and knee are the following, in order of relevance value (consensus of french experts): 1) the loss of joint space thickness on successive radiographies; 2, 3) the indices of the severity for OA of the hip and knee; the investigator's overall opinion; 4) the patient's overall opinion (visual analogue scale of handicap); 5, 6, 7) the pain level (visual analogue scale); the time for going up and down a standard flight of stairs and the time of pain in this distance; the limitation of two articular movements; 8) the increase of either analgesics or NSAIDs consumption; 9) concerning OA of fingers, the number of joints newly involved on successive radiographies. At present, only the radiological tests 1 and 9 are validated. The clinical tests 2 to 8, valuable for short term trials, have yet to be validated for long term follow-up. Recommended duration of trials is three years. A rigorous organisation is necessary to avoid erroneous inclusions: all data recorded in the pre-inclusion visit have to be checked by the principal investigator. Since we have not yet a validated chondroprotective agent as a reference drug, the trial must be randomised, double blind, placebo controlled, parallel group study.
Through osteoarthritis is the most common rheumatic disease its fundamental medicinal therapy(s) remain(s) still to be discovered. Definitions of the terms anti-osteoarthritic or chondroprotective agents vary according to the conceptual ideas in presence. They are discussed. In order to know the view point of private rheumatologists, a survey has been realised. 63 rheumatologists answered a questionnaire which included three parts: the first one, semantic, concerned definitions of anti-osteoarthritic and chondroprotective drugs and their respective place in therapeutic; a questionnaire of methodology was then exploring conception and organisation of clinical trials to assess such drugs in osteoarthritis; finally questions were asked on feasibility of such trials. The results are presented and discussed below.
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