In vivo anterior cruciate ligament strain behaviour during a rapid deceleration movement: case report
In vivo anterior cruciate ligament strain behaviour during a rapid deceleration movement: case report
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DOI：
10.1007/s00167-003-0403-6
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发表时间：
2003-09-01
影响因子：
3.8
通讯作者：
Liti, A
中科院分区：
文献类型：
--
作者：
Cerulli, G;Benoit, DL;Liti, A
前交叉韧带（ACL）损伤的机制尚不清楚。为了获得这一见解，必须在体内研究健康 ACL 在可能对韧带施加压力的活动期间的机械行为。这项研究的目的是测量快速减速期间体内 ACL 应变，这种运动类型的运动之前已被证明在健康受试者中先于 ACL 受伤。一名以前没有膝关节损伤的年轻男性受试者在知情同意后自愿加入。应变计装置 (DVRT) 经过校准并通过手术植入完整 ACL 的前内侧带中。然后受试者被运送到实验室进行数据收集。使用松紧技术确定 ACL 的零应变位置。受试者以最快的速度从距目标 1.5 m 的地方跳起，在测力板中心贴有一个 X，用装有仪器的左腿着陆并停在着陆位置。整个收集窗口在 1000 Hz 时为 5 秒。在跳跃周期内总共收集了三个快速减速试验并取平均值。然后重复松弛-拉紧测试，以确保 DVRT 的正常运行和结果的可靠性。结果显示，仪器化 Lachman 测试期间 ACL 的平均峰值应变为 2.00 +/- 0.17%。快速减速任务期间 ACL 的平均峰值应变为 5.47 +/- 0.28%。数据表明，RD 任务导致峰值 ACL 应变增加，远高于仪器化拉赫曼测试期间的应变，并且应变在着陆之前的飞行阶段开始增加，并达到与峰值地面反作用力相对应的峰值。该技术可用于进一步的运动特定运动，以深入了解与 ACL 损伤机制相关的运动模式。
The mechanism of anterior cruciate ligament (ACL) injury is still unclear. To gain this insight, knowledge of the mechanical behaviour of the healthy ACL during activities that may stress the ligament must be investigated in vivo. The goal of this research was to measure ACL strain in vivo during rapid deceleration, a sport type movement that has been previously shown to precede injuries to the ACL in healthy subjects. A young male subject with no previous knee joint injuries volunteered after informed consent. The strain gauge device (DVRT) was calibrated and surgically implanted in the antero-medial band of the intact ACL. The subject was then transported to the lab for data collection. The zero strain position of the ACL was determined using the slack-taut technique. The subject hopped as quickly as possible from a distance of 1.5 m to the target, an X taped at the centre of a force plate, landing with the instrumented left leg and stopping in the landed position. The entire collection window was five seconds at 1000 Hz. A total of three rapid deceleration trials were collected and averaged over the hop cycle. The slack-taut test was then repeated to ensure proper operation of the DVRT and the reliability of the results. The results showed an average peak strain of the ACL during the instrumented Lachman test of 2.00 +/- 0.17%. The average peak strain of the ACL during the rapid deceleration task was 5.47 +/- 0.28%. The data indicate that the RD task caused an increase in peak ACL strain that is much higher than during the instrumented Lachman test, and that the strain begins to increase during the flight phase, prior to landing, and reaches a peak that corresponds to the peak ground reaction force. This technique may be used in further sport-specific movements to gain insight into movement patterns associated with ACL injury mechanisms.