Cho M S, Means K R, Shrout J A, Segalman K A
Curtis National Hand Center, Baltimore, MD, USA.
J Hand Surg Eur Vol. 2008 Oct;33(5):648-52. doi: 10.1177/1753193408092037.
This study attempts to determine changes in carpal canal volume with distraction across the wrist. Uniform longitudinal distraction was maintained with two external fixators on the radial and ulnar aspects of the forearm axis of five cadaver specimens. After CT scanning, volume determinations were made at 5 mm increments beginning at the lunocapitate joint to a point 1.5 cm distal to the middle finger carpometacarpal joint. There was a statistically significant decrease of the mean total carpal canal volume from 0 to 4.54 kg of distraction, with no statistically significant decrease from 0 to 2.27 kg or 2.27 to 4.54 kg. The largest decrease occurred at 15 and 20 mm distal to the proximal edge of the transverse carpal ligament corresponding to the level of the hamate hook. Reduction in mean carpal canal volume was 10.2% and 7.5% at these distances, respectively, from 0 to 4.54 kg of distraction. Progressive distraction across the wrist causes a decrease in total carpal canal volume.
本研究试图确定腕关节牵张时腕管容积的变化。使用两个外固定器在前臂轴的桡侧和尺侧对五个尸体标本的腕关节进行均匀的纵向牵张。CT扫描后，从月头关节开始，以5毫米的增量进行容积测定，直至中指腕掌关节远侧1.5厘米处。从0至4.54千克牵张力时，平均腕管总容积有统计学意义的下降，而从0至2.27千克或2.27至4.54千克时，无统计学意义的下降。最大降幅出现在腕横韧带近端边缘远侧15和20毫米处，对应钩骨钩水平。从0至4.54千克牵张力时，在这些距离处平均腕管容积分别减少10.2%和7.5%。腕关节的渐进性牵张会导致腕管总容积减小。
