McGill N W, York H F
Department of Rheumatology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.
Aust N Z J Med. 1991 Oct;21(5):710-3. doi: 10.1111/j.1445-5994.1991.tb01374.x.
A quality assurance survey of synovial fluid examination for crystals was performed at six teaching hospitals. Aliquots of 12 different fluids (three with no crystals, one with betamethasone crystals, four with calcium pyrophosphate dihydrate (CPPD) crystals and four with monosodium urate monohydrate [urate] crystals) were examined by all six laboratories. Four laboratories performed well (10 or more correct out of 12) but two did poorly (50% or less correct). False positive crystal identification occurred in eight of 72 samples, but all false positive reports were from two laboratories. CPPD and urate crystals were missed in seven of 24 (29%) and five of 24 (21%) samples respectively. The standard of synovial fluid examination for crystals in Sydney teaching hospitals is not uniform and in some cases appears unsatisfactory.
在六家教学医院对滑膜液晶体检查进行了质量保证调查。所有六个实验室对12种不同液体的等分试样（三种无晶体，一种含倍他米松晶体，四种含二水焦磷酸钙[CPPD]晶体，四种含一水尿酸钠[尿酸]晶体）进行了检查。四个实验室表现良好（12个样本中10个或更多正确），但两个实验室表现不佳（正确率为50%或更低）。72个样本中有8个出现晶体鉴定假阳性，但所有假阳性报告均来自两个实验室。分别有24个样本中的7个（29%）和24个样本中的5个（21%）遗漏了CPPD和尿酸晶体。悉尼教学医院滑膜液晶体检查的标准不统一，在某些情况下似乎不尽人意。
