Climenhaga H W, Pearce W G
Can J Ophthalmol. 1984 Aug;19(5):234-6.
The likelihood of forward "creep" of muscles recessed with the use of adjustable loops of suture in the correction of strabismus was investigated. Twelve orthotropic dogs underwent both regular and loop recessions of the lateral and medial rectus muscles; the data for two of the dogs were excluded because of loss of muscles. Three months later it was found that in the majority of cases the recessed muscles had minimally advanced from the position of surgical placement. Although the type of recession made little difference to the results, the mean forward creep was much greater for the medial rectus muscles (1.55 +/- 0.68 mm [p less than 0.01] and 2.00 +/- 2.44 mm [p = 0.09] for those undergoing regular and loop recessions respectively) than for the lateral rectus muscles (0.35 +/- 0.58 mm and 0.60 +/- 0.62 mm respectively). During the operations the amount of contraction of the medial rectus muscle had been noted to vary. It is likely that in some instances the tension on the suture loops was insufficient to hold them taut, and the muscles therefore adhered to the sclera at variable sites. Hence, adequate intrinsic muscle tone may be important for predictable clinical results of loop recession.
研究了在斜视矫正中使用可调节缝线环对肌肉进行后徙时肌肉向前“蠕动”的可能性。12只正视眼犬接受了外直肌和内直肌的常规后徙和缝线环后徙；由于肌肉丢失，排除了其中2只犬的数据。3个月后发现，在大多数情况下，后徙的肌肉从手术放置位置向前推进的幅度很小。虽然后徙类型对结果影响不大，但内直肌的平均向前蠕动（分别接受常规后徙和缝线环后徙的内直肌平均向前蠕动为1.55±0.68mm[p<0.01]和2.00±2.44mm[p=0.09]）比外直肌（分别为0.35±0.58mm和0.60±0.62mm）大得多。手术过程中注意到内直肌的收缩量有所不同。在某些情况下，缝线环上的张力可能不足以使其保持拉紧状态，因此肌肉在不同部位与巩膜粘连。因此，足够的肌肉固有张力对于缝线环后徙可预测的临床结果可能很重要。
