Department of Anatomy, Catholic Institute for Applied Anatomy, The Catholic University of Korea School of Medicine, Seoul, Korea.
Clin Orthop Surg. 2012 Sep;4(3):188-92. doi: 10.4055/cios.2012.4.3.188. Epub 2012 Aug 14.
Despite the importance of soft tissue balancing during total knee arthroplasty (TKA), all estimating techniques are dependent on a surgeon's manual distraction force or subjective feeling based on experience. We developed a new device for dynamic gap balancing, which can offer constant load to the gap between the femur and tibia, using pneumatic pressure during range of motion.
To determine the amount of distraction force for the new device, 3 experienced surgeons' manual distraction force was measured using a conventional spreader. A new device called the consistent load pneumatic tensor was developed on the basis of the biomechanical tests. Reliability testing for the new device was performed using 5 cadaveric knees by the same surgeons. Intraclass correlation coefficients (ICCs) were calculated.
The distraction force applied to the new pneumatic tensioning device was determined to be 150 N. The interobserver reliability was very good for the newly tested spreader device with ICCs between 0.828 and 0.881.
The new pneumatic tensioning device can enable us to properly evaluate the soft tissue balance throughout the range of motion during TKA with acceptable reproducibility.
尽管在全膝关节置换术（TKA）中软组织平衡很重要，但所有的估计技术都依赖于外科医生的手动分离力或基于经验的主观感觉。我们开发了一种新的用于动态间隙平衡的设备，该设备可以在运动范围内使用气动压力为股骨和胫骨之间的间隙提供恒定的负载。
为了确定新设备的分离力，使用常规撑开器测量了 3 名经验丰富的外科医生的手动分离力。在生物力学测试的基础上，开发了一种新的称为恒载气动张量的设备。同一位外科医生使用 5 个尸体膝关节对新设备进行了可靠性测试。计算了组内相关系数（ICCs）。
新气动张紧装置的分离力确定为 150 N。对于新测试的撑开器，观察者间的可靠性非常好，ICC 介于 0.828 至 0.881 之间。
新的气动张紧装置可以使我们在 TKA 整个运动范围内使用可接受的可重复性来正确评估软组织平衡。
