Comparison of Ranges of Cervical Motion Measured by Gravity-Based Goniometry and Ultrasound-Based Motion Analysis System

以頸部角度測量儀及超音波動作分析系統測量頸部關節活動度之比較

王淑芬(Shwu-Fen Wang) ； 柴惠敏(Huei-Ming Chai) ； 呂東武(Tung-Wu Lu)

《物理治療》 27卷3期 (2002/06) Pp. 124-130

摘要

研究背景與目的：以頸部角度測量儀(CORM)及超音波動作分析系統(Zebris)測量頸部關節活動度，在過去文獻中均顯示具優良之測量效度。但以此二種工具測量健康人之頸部關節角度，在不同文獻中之結果不盡相同。如此不同之結果，是由於取樣或儀器之差異仍未知。本篇研究即在探討同時以頸部角度測量儀及超音波動作分析系統測量頸部關節活動度之相關性。方法：四十位19-45歲的健康受試者接受頸部關節活動度測量。受試時，頸部角度測量儀及超音波動作分析系統之頭部超音波感應支架互相重疊，且同時戴在受試者的頭部。受試者以自覺舒適速度，作最大角度之頸部的前屈、後仰、及左右側彎方向之動作。統計方法以配對之t-test、同意度範圍、及線性回歸，檢測兩測量儀器所測得之最大頸部前屈、後仰及左右側彎角度的差異、臨床一致性、及是否具線性關係。結果：於頸部前屈及左右側彎時，兩測量儀器之值無明顯差異。於頸部後仰時，兩測量儀器之值有明顯差異。此四方向上，頸部動作之兩測量儀器測量值間均具線性關係。其R^2的範圍為0.67-0.89，β值為0.82-0.94。同意度的範圍，在左右側彎時範圍為-5.38度至6.37度。在後仰及前屈方向較大，其值範圍為－14.12度至9.60度。結論：於頸部前屈及左右側彎時，兩測量儀器之值的差異無統計差異，同意度的範圍略大於臨床可接受之正負五度範圍。於後仰時，兩測量儀器之值有明顯差異，較可能是緣於兩測量儀器測量原理之不同。

關鍵字

頸椎 ； 活動度 ； 測量

並列摘要

Background and Purposes: The gravity-based Cervical Range of Motion (CROM) device and the ultrasound-based computerized motion analysis system (Zebris) have both been shown to be highly reliable in measuring cervical range of motion (ROM). The ranges of cervical motion of healthy young subjects measured by these two devices, however, were reported to be different in values. Whether this discrepancy is the result of sampling or instrumentation bias is unknown. The purpose of this study was to examine the relationship between the ranges of neck motion measured simultaneously by the gravity-based CROM device and the ultrasound-based Zebris motion analysis system Methods: Forty healthy subjects aged from 19-45 years were recruited. The subjects wore the head attachment of the Zebris system, on which the CROM device was superimposed. The subjects were asked to perform maximum neck movements in flexion/extension and side-bendings at the self-determined comfortable speed. Pair t-test, limit of agreement, and regression analysis were used to test the difference, clinical consistence, and relationship, respectively, of the ROMs measured from these two devices. Results: For the ranges measured during flexion, and side-bending, there were no significant differences between the values obtained from these two devices, while for those measured during extension, there was a significant difference (p＜0.05). The measured ROMs by the CROM and Zebris were linearly related (p＜0.05) in all directions of neck movements with the R^2 ranging from 0.67 to 0.89, β and values ranging from 0.82 to 0.94. The limits of agreement for the movements in side-bendings ranged from -5.38° to 6.37°; and in flexion/extension ranged from -14.12° to 9.60°. Conclusions: During extension, the discrepancy exists between cervical ROMs measured by the CROM and Zebris The ROMs of the neck side-bending and flexion, how ever, showed no difference between the values obtained by these two devices. These results indicated that although these two devices were based on different principles, both might approach the same values in side-bending. The issue of the consistency of measurement instrument should be settled before comparing the ranges of extension of the cervical spine measured by these two devices.

並列關鍵字

Cervical spine ； Measurement ； Range of motion