Gillig J D, Smith M D, Hutton W C, Jarrett C D
Emory University School of Medicine, Atlanta, Georgia, USA.
Hand and Upper Extremity Surgery, Emory University School of Medicine, Atlanta, GA, USA.
J Hand Surg Eur Vol. 2015 Sep;40(7):729-34. doi: 10.1177/1753193415585311. Epub 2015 May 12.
Delayed diagnosis of jersey finger injuries often results in retraction of the flexor digitorum profundus tendon. Current practice recommends limiting tendon advancement to 1 cm in delayed repairs. The purpose of this study was to investigate the biomechanical consequences of tendon shortening on the force required to form a fist. The flexor digitorum profundus muscle was isolated in ten cadaveric forearms and the force required to form a fist was recorded. Simulated jersey finger injuries to the ring finger were then created and repaired. The forces required to pull the fingertips to the palm after serial tendon advancements were measured. There was a near linear increase in the force required for making a fist with shortening up to 2.5 cm. The force required to make a fist should be taken into account when considering the limit of 'safe' tendon shortening in delayed repair of jersey finger injuries.
指深屈肌腱损伤的延迟诊断常导致该肌腱回缩。目前的做法是在延迟修复时将肌腱推进限制在1厘米。本研究的目的是调查肌腱缩短对握拳所需力量的生物力学影响。在十具尸体前臂中分离出指深屈肌，并记录握拳所需的力量。然后对环指造成模拟的“拳击手指”损伤并进行修复。测量了肌腱连续推进后将指尖拉至手掌所需的力量。肌腱缩短达2.5厘米时，握拳所需力量几乎呈线性增加。在考虑“拳击手指”损伤延迟修复时“安全”肌腱缩短的限度时，应考虑握拳所需的力量。
