Kolb Werner, Guhlmann Hanno, Windisch Christoph, Marx Frank, Kolb Klaus, Koller Heiko
Department of Trauma Surgery, Friedrich-Schiller-University, Jena, Germany.
J Trauma. 2008 Dec;65(6):1425-34. doi: 10.1097/TA.0b013e318166d24a.
The Less Invasive Stabilization System (LISS) is an internal fixator, which combines closed reduction of the diaphysis or metaphysis of distal femur fractures with locked unicortical screw fixation.
In a retrospective consecutive study, 50 patients with Association for the Study of the Problems of Internal Fixation/Orthopaedic Trauma Association (AO/OTA) type 33-A1 to 33-C3 fractures were treated with the LISS between January 1999 and December 2003. Final results were assessed using the functional score of Neer after a median follow-up of 29 months (15-48 months).
Fifteen male and 16 female patients were followed up. The mean age was 49 years (17-90 years). Deep wound infection was seen in one patient (3%) and malpositioning with cutting-out of the proximal screws was in two patients (6%). All other fractures healed uneventfully without bone graft requirements after a mean of 12 weeks (7-20 weeks). A revised osteosynthesis was performed for correction of a valgus deformity of 20 degrees after 4 months. There was no difference in leg length exceeding 2 cm. One patient had a valgus deformity of 10 degrees combined with a rotational deformity of 10 degrees. Range of motion of the knee joint was >120 degrees in 15 patients (48%); 12 (39%) had a range of motion between 90 degrees and 120 degrees and 4 (13%) between 70 degrees and 90 degrees. The function according to the Neer score was excellent in 15 (48%), good in 10 patients (32%), and fair in 6 patients (20%). The mean Neer score was 80 (60-100).
The LISS promotes early mobilization and rapid rates of bony and clinical healing without bone grafting with low rates of infection.
微创稳定系统（LISS）是一种内固定器，它将股骨远端骨干或干骺端骨折的闭合复位与锁定单皮质螺钉固定相结合。
在一项回顾性连续研究中，1999年1月至2003年12月期间，50例国际内固定研究学会/骨科创伤学会（AO/OTA）33 - A1至33 - C3型骨折患者接受了LISS治疗。在中位随访29个月（15 - 48个月）后，使用Neer功能评分评估最终结果。
随访了15例男性和16例女性患者。平均年龄为49岁（17 - 90岁）。1例患者（3%）发生深部伤口感染，2例患者（6%）出现近端螺钉穿出伴错位。所有其他骨折在平均12周（7 - 20周）后均顺利愈合，无需植骨。4个月后进行了翻修接骨术以矫正20度的外翻畸形。下肢长度差异未超过2厘米。1例患者有10度外翻畸形合并10度旋转畸形。15例患者（48%）膝关节活动范围>120度；12例（39%）活动范围在90度至120度之间，4例（13%）在70度至90度之间。根据Neer评分，功能优15例（48%），良10例（32%），可6例（20%）。平均Neer评分为80（60 - 100）。
LISS促进早期活动，实现快速的骨愈合和临床愈合，无需植骨，感染率低。
