CORR Insights®: Using Laser Range-finding to Measure Bore Depth in Surgical Drilling of Bone.

S. Gilbert
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引用次数: 1

Abstract

In the current study, Demsey and colleagues [3] developed a laser range finder prototype that can be attached to an existing drill to measure the depth holes drilled in bone. The device consists of two laser displacement sensors mounted on the sides of a conventional surgical drill that measure displacement relative to a custom drill guide held against the bone surface in standard fashion. The protype calculated the distance and depth to the bone surface from the difference between the initial position and the breach of the second cortex. The device had acceptable accuracy (within 1 mm to 2 mm) and good precision (within 1 mm). The authors correctly noted that most of the internal fixation systems currently available rely on mechanical depth gauges that are essentially unchanged since the original description in 1948 [5]. Surgeons who have performed osteosynthesis procedures understand well the challenges of reproducing the drill path to insert the depth gauge, the struggles to “hook” the far cortex, especially when soft tissue constraints intervene, and the difficulty visualizing the numbers, which seem to inevitably be on the side facing opposite the surgeon. This all adds up to increased surgical time or improper implant selection, which can lead to wasted implants or complications from screws that are too short or too long. For these reasons, the work of Demsey and colleagues [3] and others [6, 7] seems important. Device manufacturers have developed drills with built-in depth measurement based on drilling force measurements or other proprietary methods [6, 7]. And while these drill systems are already available for clinical use, the user must purchase a new drill system, which may be cost-prohibitive. Demsey and colleagues [3] used laser displacement as an “add-on” measurement tool that could be applied to existing drill systems, allowing for accurate depth measurement without an additional step.
CORR Insights®:使用激光测距测量手术钻孔骨孔深度。
在目前的研究中,Demsey及其同事[3]开发了一种激光测距样机,该样机可以连接到现有的钻头上,以测量在骨头上钻孔的深度。该装置由两个激光位移传感器组成,安装在常规手术钻头的两侧,测量相对于以标准方式固定在骨表面的定制钻头导向的位移。该模型根据初始位置和第二皮质缺口之间的差值计算出到骨表面的距离和深度。该设备具有可接受的精度(在1毫米到2毫米之间)和良好的精度(在1毫米以内)。作者正确地指出,目前可用的大多数内固定系统依赖于机械深度计,自1948年最初描述以来基本上没有改变[5]。做过植骨手术的外科医生很好地理解再现插入深度计的钻孔路径的挑战,“钩住”远端皮质的挣扎,特别是当软组织限制介入时,以及可视化数字的困难,这些数字似乎不可避免地出现在面对外科医生的对面。这一切都增加了手术时间或不正确的种植体选择,这可能导致种植体浪费或螺钉太短或太长并发症。由于这些原因,Demsey及其同事[3]和其他人[6,7]的工作似乎很重要。设备制造商已经开发出基于钻井力测量或其他专有方法的内置深度测量钻头[6,7]。虽然这些钻孔系统已经可用于临床应用,但用户必须购买新的钻孔系统,这可能会导致成本过高。Demsey及其同事[3]将激光位移作为一种“附加”测量工具,可应用于现有的钻井系统,无需额外步骤即可实现精确的深度测量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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