Kelly Paul M, Hopkins John G, Furey Andrew J, Squire Daniel S
1 Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada.
Hand (N Y). 2018 Nov;13(6):666-670. doi: 10.1177/1558944717726372. Epub 2017 Aug 29.
Injuries to the scapholunate can have severe long-term effects on the wrist. Early detection of these injuries can help identify pathology. The purpose of this study was to evaluate the motions of the scapholunate joint in normal wrists in a clenched fist and through radial and ulnar deviation using novel dynamic computed tomography (CT) imaging.
Fifteen participants below 40 years of age consented to have their wrist scanned. Eight participants were randomized to have the right wrist scanned and 7 the left wrist. Volunteers were positioned at the back of the gantry with the wrist placed on the table, palmar side down. Participants began with the hand in a relaxed fist position and then proceeded through an established range of motion protocol. Dynamic CT imaging was captured throughout the range of motion.
The movement in the healthy scapholunate joint through a clenched fist and radial and ulnar deviation is minimal. The averages were 1.19, 1.01, and 0.95 mm, representing the middle, dorsal, and volar measurements, respectively.
This novel dynamic CT scan of the wrist is a user-friendly way of measuring of the scapholunate distance, which is minimal in the normal wrist below 40 years of age.
舟月骨损伤可对腕关节产生严重的长期影响。早期发现这些损伤有助于识别病变。本研究的目的是使用新型动态计算机断层扫描（CT）成像技术，评估正常腕关节在握拳以及桡偏和尺偏时舟月关节的运动情况。
15名40岁以下的参与者同意对其腕关节进行扫描。8名参与者被随机分配扫描右手腕，7名扫描左手腕。志愿者站在扫描架后方，将手腕放在桌子上，手掌朝下。参与者先将手置于放松的握拳位置，然后按照既定的运动范围方案进行操作。在整个运动范围内采集动态CT图像。
健康的舟月关节在握拳以及桡偏和尺偏时的移动极小。平均值分别为1.19、1.01和0.95毫米，分别代表中间、背侧和掌侧的测量值。
这种新型的腕关节动态CT扫描是一种测量舟月间距的便捷方法，在40岁以下的正常腕关节中该间距极小。
