No abstract

No abstract

Objective: To determine the reliability of a delay in the microscopic examination of synovial fluid (SF) to detect and identify crystals. Methods: Ninety one SF samples were examined, 31 with monosodium urate (MSU) crystals, 30 with crystals of calcium pyrophosphate dihydrate (CPPD), and 30 containing no crystals. The specimens were stored with EDTA, sodium heparin, and without anticoagulant at 4ºC before examination at 24 and 72 hours with ordinary and polarised light microscopy. Another aliquot of the same samples was stored in a plastic container without anticoagulant at −80°C and examined after two months. Results: When the samples stored at 4ºC were re-examined after 24 hours, intracellular crystals of MSU were seen in 90/93 (97%) cases where they had been identified previously and 89/93 (96%) cases after 72 hours. Similarly, CPPD crystals were identified in 90/90 (100%) and 87/90 (97%) cases after 24 and 72 hours. Examination of the samples stored at −80°C showed intracellular MSU crystals in 25/31 (81%) of cases and CPPD crystals in 25/30 (83%). No crystals were seen in any sample which had previously been diagnosed as crystal-free. Conclusions: Deferred microscopic examination of refrigerated or deep frozen SF provides a strong probability of detecting MSU or CPPD crystals if these are present initially.

Aims The dental setting is a potentially valuable venue for screening for substance misuse. Therefore, we assessed dentists’ inquiry of substance misuse through their patient medical history forms and their agreement with the compatibility of screening as part of the dentists’ professional role. Design A nationally representative survey of general dentists using a sampling frame obtained from the American Dental Association Survey Center (November 2010 – November 2011). Setting United States of America Participants 1,802 general dentists Measurements A 38 item survey instrument assessing the relationship between dentists’ practice, knowledge, behaviors, and attitudes with their query about substance misuse and their belief that such screening is part of their professional role. Findings Dentists who accepted substance misuse screening as part of their professional role were more likely to query about misuse with their patients (85.8%) compared with those who did not accept such screening as part of their role (68.2%) (p<0.001). Prior experience and knowledge about substance misuse were the strongest predictors of dentists’ inquiry about patient substance use/misuse and acceptance of screening as part of their role in their clinical practice (p<0.05). Conclusion While more than three quarters of U.S. dentists-report that they ask their patients about substance misuse, two-thirds do not agree that such screening is compatible with their professional role.