Aström M, Westlin N
Department of Orthopaedics, Malmö General Hospital, Lund University, Sweden.
J Orthop Res. 1994 Mar;12(2):246-52. doi: 10.1002/jor.1100120214.
This study evaluated microvascular perfusion in the human Achilles tendon by laser Doppler flowmetry (LDF) at rest, during vascular occlusion, and during passive stretch and isometric contraction of the triceps surae. In 40 healthy volunteers, an intratendinous needle probe was introduced 5 mm above the distal insertion, at the midportion, and at the musculotendinous junction of both legs. Values were obtained at rest and during temporary vascular occlusion. Twenty-eight of the subjects also were assessed during physical provocation by passive stretch and isometric contraction of the triceps surae. Blood flow was significantly lower near the calcaneal insertion but otherwise was distributed evenly in the tendon. The output signal showed a pulsatile variation synchronous with heart activity, and temporary vascular occlusion always caused a pronounced reduction in LDF values. Passive stretch and isometric contraction induced a progressive decline in LDF values as tension increased. Hyperemia often appeared after contraction. Tendon blood flow was higher in women and decreased with increasing age.
本研究通过激光多普勒血流仪（LDF）评估了人类跟腱在静息状态、血管闭塞期间、以及小腿三头肌被动拉伸和等长收缩期间的微血管灌注情况。在40名健康志愿者中，将肌腱内针式探头分别插入双腿远端附着点上方5毫米处、中部以及肌肉-肌腱交界处。在静息状态和临时血管闭塞期间获取数据。其中28名受试者还在小腿三头肌被动拉伸和等长收缩的物理刺激过程中接受了评估。跟骨附着点附近的血流明显较低，但在肌腱其他部位分布均匀。输出信号显示出与心脏活动同步的搏动性变化，临时血管闭塞总是导致LDF值显著降低。随着张力增加，被动拉伸和等长收缩会导致LDF值逐渐下降。收缩后常出现充血现象。女性的肌腱血流量较高，且随年龄增长而降低。
