A Cadaveric Study of Synovial Fluid Kinematics at the Scapholunate Joint
Volume 3, Issue 3 YOKE RUNG WONG, ITA SUZANA MAT JAIS, ALYSSA LIYU TOH, DUNCAN, ALYSSA LIYU TOH, DUNCAANGUS MCGROUTHER
Published online:20 November 2017
Article Views: 26
Abstract
Studies on carpal bone kinematics have been conducted before. However, fewer have been done to investigate the synovial fluid kinematics in the scapholunate joint during repetitive wrist movements. We hypothesize that such repetitive wrist movements, i.e., ulnar deviation, could potentially cause the synovial fluid pressure to change accordingly. The objective of this study is to conduct an experimental study to measure synovial fluid pressure changes at the scapholunate joint of a cadaveric hand (n = 1) under repetitive ulnar deviation. A cadaveric hand with the elbow intact was mounted on a custom-made motion simulator at the neutral position, and the wrist was moved passively towards ulnar deviation. Intact synovial fluid was extracted from the scapholunate joint with the aid of ultrasound. Hylan GF-20 (Synvisc, USA) was then injected till its synovial fluid cavity was filled. The used needle was then connected to a pressure transducer via a rigid tube primed with saline solution. The synovial fluid pressure was measured continuously when the cadaveric wrist was moved 20◦ towards ulnar deviation at 60 cycles per minute. Two independent sets of real-time data were recorded for 15 sec using a Data Acquisition system. The average magnitude of synovial fluid pressure from each dataset was calculated. The synovial fluid pressure change in the scapholunate joint was 174.7 Pa (± 26.4). The changes in pressure over time corresponded to the neutral to maximum ulnar deviation positions of the hand, suggesting synovial fluid pressure changes induced by the wrist movements. Clinically, we postulate that the synovial fluid pressure generated during ulnar deviation may weaken the scapholunate interosseous ligament after a prolonged period of repetitive wrist motion.
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To Cite this article
Y. R. Wong, I. S. M. Jais, A. L. Toh., D. A. Mcgrouther, “A cadaveric study of synovial fluid kinematics at the scapholunate joint,” International Journal of Health and Medical Sciences, vol. 3, no. 3, pp. 75-79, 2017.
