Rheologic Studies on Synovial Fluid
RHEOLOGIC STUDIES ON SYNOVIAL FLUID Milton G. Levine, David H. Kling J Clin Invest. 1956;35(12):1419-1427. https://doi.org/10.1172/JCI103399. Research Article Find the latest version: https://jci.me/103399/pdf RHEOLOGIC STUDIES ON SYNOVIAL FLUID By MILTON G. LEVINE AND DAVID H. KLING (From the Boyar-Kling Arthritis Clinic, Los Angeles, Calif.) (Submitted for publication March 28, 1956; accepted September 5, 1956) The relative viscosity of normal and pathologi- for most joint fluids; a 22 gauge is preferable for fluids cal synovial fluids fluctuates over a wide range, of low viscosity, and an 18 gauge for highly viscid fluids. and has been studied for a considerable period. The attachment of the needle to the pipette is made water-tight by a rubber sleeve, or by a cement seal, or The older literature is covered by Kling (1), and the delivery end of the pipette may be ground so that it the more recent by Ropes and Bauer (2) and by fits snugly into the hilt of the needle. Sundblad (3). Early investigators established, The viscometer is filled by suction above the zero by precipitation reactions with acetic acid, that mark, and the upper opening of the pipette is kept closed the high viscosity was due to a "mucin," assumed with a finger. The pipette is placed in a clamp holder and immersed in a constant temperature bath until the to be a combination of protein and carbohydrate. hilt of the hypodermic needle meets the water level. The In 1939, Meyer, Smyth, and Dawson (4) identi- measurement is started by releasing the finger, and the fied the polysaccharide as hyaluronic acid, and rate of flow is timed between two selected points on the found it to be responsible for the high viscosity.
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