Sisson Leah, Croy Theodore, Saliba Susan, Hertel Jay
Int J Sports Phys Ther. 2011 Dec;6(4):297-305.
PURPOSE/BACKGROUND: Ultrasonography (US) may aid the assessment of the anterior talofibular ligament (ATFL) injury after lateral ankle sprains by allowing the clinician to visualize and measure talocrural laxity. Comparison of US against another objective method of ankle laxity assessment, such as ankle arthrometry (AA), is needed. The purpose was to evaluate the relationship between the ATFL length measurements measured from stress US images to the inversion and anterior drawer displacement measured with AA in healthy subjects.
This descriptive laboratory study included 26 ankles from healthy subjects. The apparent length of the ATFL was measured using US during anterior drawer (USAD) and inversion (USINV) stress and the translation of the talocrural joint was measured using AA during anterior drawer (AAAD) and inversion (AAINV) stress. Percent change in length for USAD and USINV were quantified. Intraclass correlation coefficients and pearson product moment correlations Bland-Altman limits of agreement were calculated between relevant variables.
USAD and USINV percent change in length were positively correlated (r = .76). Bland Altman analysis revealed a mean difference of 5.38 mm (95% CI: -3.5 to 12 mm) with the AAAD producing higher values than the USAD. No significant correlations were found between the US and AA variables, however the absolute AAAD and AAINV variables were also positively correlated (r = .61).
The US and AA variables were not directly correlated when measuring inversion and anterior laxity in healthy ankles. Differences between the devices that may affect this include different rates of joint loading, patient position and method of assessing laxity. The AA results demonstrated greater anterior displacement. Results may differ in ankle injured subjects who may demonstrate increases in anteroposterior and inversion laxity.
2b. Exploratory study in healthy cohort.
目的/背景：超声检查（US）可通过让临床医生可视化并测量距小腿关节松弛度，辅助评估外侧踝关节扭伤后距腓前韧带（ATFL）损伤。需要将US与另一种客观的踝关节松弛度评估方法（如踝关节测压法（AA））进行比较。目的是评估在健康受试者中，从应力US图像测量的ATFL长度测量值与用AA测量的内翻和前抽屉位移之间的关系。
这项描述性实验室研究纳入了26名健康受试者的踝关节。在进行前抽屉（USAD）和内翻（USINV）应力时，使用US测量ATFL的表观长度，在进行前抽屉（AAAD）和内翻（AAINV）应力时，使用AA测量距小腿关节的平移。对USAD和USINV的长度变化百分比进行量化。计算相关变量之间的组内相关系数、皮尔逊积矩相关性和布兰德-奥特曼一致性界限。
USAD和USINV的长度变化百分比呈正相关（r = 0.76）。布兰德-奥特曼分析显示，平均差异为5.38毫米（95%CI：-3.5至12毫米），AAAD的值高于USAD。在US和AA变量之间未发现显著相关性，然而，绝对的AAAD和AAINV变量也呈正相关（r = 0.61）。
在测量健康踝关节的内翻和前松弛度时，US和AA变量没有直接相关性。可能影响此结果的设备之间的差异包括不同的关节加载速率、患者体位和评估松弛度的方法。AA结果显示前位移更大。在踝关节受伤的受试者中结果可能不同，这些受试者可能表现出前后和内翻松弛度增加。
2b。健康队列中的探索性研究。
