Annals of the rheumatic diseases
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Clinical Trial Controlled Clinical Trial
Analgesic effect of indomethacin shown using the nociceptive flexion reflex in humans.
This study investigated whether indomethacin has an analgesic effect on the central nervous system. As analgesics which affect the central nervous system produce a correlated decrease in the subjective sensation of pain and in the nociceptive reflex in humans, the amplitude of the nociceptive flexion of the biceps femoris was studied. Eight patients (six men, two women) aged 35-70 years (mean 51) with rheumatic diseases were included in the study. ⋯ Patients were evaluated before and 30, 60, and 75 minutes after the injection. Seventy five minutes after injection, indomethacin gave a 54% decrease in the amplitude of the nociceptive reflex, whereas the placebo produced a decrease of only 12%. This suggests that indomethacin exerts a depressive effect on the amplitude of the nociceptive reflex and affects the central nervous system as part of its analgesic action.
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A system for assessing symptoms (pain, stiffness, gelling) and signs (local temperature, effusion, tenderness, synovial swelling, popliteal cyst, crepitus) of osteoarthritis of the knee has been developed. The system has been assessed for intra- and interobserver variation using normal and osteoarthritic knees. Intraobserver variability is low for all indices but interobserver variability is high for physical signs. It is suggested that the components within this system, when applied by a single observer, may provide a reasonable framework for clinical assessment of osteoarthritis of the knee.
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One hundred and twelve randomly selected patients referred to a rheumatology unit were studied, using structured questionnaires, to gain the views of patients, general practitioners (GPs), and the consultants. There were differences in perception between these respondents on the reason for referral. Major diagnostic changes were made in less than 10% of cases. ⋯ Satisfaction with the communication aspects of the appointment contributed more to patients' overall satisfaction than did improvement in pain or disability. General practitioners' objectives were also met if communication with patients was satisfactory. In the management of chronic disease communication is important and should be recognised as such.
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Four patients with osteoarthritis of the hip, who developed septic arthritis of the affected joint, are reported. The septic arthritis developed insidiously and was diagnosed with difficulty. ⋯ These cases suggest that osteoarthritis, similarly, is a predisposing factor. It is concluded that joint sepsis should be considered if a patient with osteoarthritis develops new symptoms from a single joint with associated systemic features.
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Systemic sclerosis is characterised by vascular endothelial damage. Platelets adhering to the exposed subendothelium may contribute to the inflammatory changes found in the vessel wall. Increased in vitro platelet aggregability in systemic sclerosis has been reported. ⋯ Each agonist caused dose dependent platelet aggregation; there was no difference in either rate of primary aggregation or maximum percentage aggregation between platelets derived from patients with systemic sclerosis and from the control group (analysis of variance). BN52063 was shown to be a dose dependent, competitive antagonist of platelet aggregation induced by platelet activating factor; there was no difference in its action on platelets derived from patients with systemic sclerosis or controls. These results do not support the hypothesis that platelets from patients with systemic sclerosis are hyperactive and may explain the disappointing results obtained with antiplatelet drugs in systemic sclerosis.