Goulet J A, Londy F, Saltzman C L, Matthews L S
Section of Orthopaedic Surgery, University of Michigan Medical Center, Ann Arbor 48109.
Clin Orthop Relat Res. 1992 Aug(281):199-203.
Insertion of distal interlocking screws in femoral nails can be technically demanding and may entail substantial exposure. A method of insertion of femoral interlocking screws that uses a laser guiding system in addition to the standard image intensifier was used in an attempt to improve the accuracy of distal screw placement and to limit radiation exposure. Using this technique, 97% of the distal femoral drill holes attempted were successfully made with the first pass of a drill. Little or no resistance to the drill was met from contacting the femoral nail. Average fluoroscopy time was 0.4 minute. Laser-assisted screw placement requires relatively inexpensive modifications of existing equipment and is easy to master. Compared with the more commonly used freehand method, laser-assisted screw placement appears to offer a reduction in the amount of time and radiation exposure required to insert distal interlocking femoral screws.
在股骨钉中插入远端交锁螺钉在技术上要求较高，且可能需要大量的暴露。一种除了标准影像增强器外还使用激光引导系统的股骨交锁螺钉插入方法被用于尝试提高远端螺钉置入的准确性并限制辐射暴露。使用该技术，97%的尝试的股骨远端钻孔在第一次钻孔时就成功完成。钻孔接触股骨钉时几乎没有遇到阻力。平均透视时间为0.4分钟。激光辅助螺钉置入需要对现有设备进行相对廉价的改造，且易于掌握。与更常用的徒手方法相比，激光辅助螺钉置入似乎能减少插入股骨远端交锁螺钉所需的时间和辐射暴露量。
