提高缝合针在手术抓持器中的固定性。
Improving the retention of suturing needles in surgical graspers.
作者信息
Brown S I, White G, Wipat K, Frank T G, Cuschieri A
机构信息
Department of Surgery and Molecular Oncology, University of Dundee, Ninewells Hospital and Medical School, Dundee, DD1 9SY, UK.
出版信息
Surg Endosc. 2004 Nov;18(11):1605-7. doi: 10.1007/s00464-004-8121-9. Epub 2004 Oct 11.
BACKGROUND
Surgical needles are usually held using dedicated grasping instruments. When the tissue to be penetrated is resilient, or the grasping force is low, the needle can swivel, causing it to deviate from the intended path, resulting in suboptimal tissue approximation. Needle swivel is particularly prevalent when needles are not held transversely in the jaws, but it is difficult to maintain a transverse grasp during surgery. An improved swivel-resistant grasper design is proposed.
METHODS
Conventional and swivel-resistant graspers were tested to quantify the benefits of the swivel-resistant design. Needles secured in the grasper were repeatedly distracted until swiveling occurred. The torque required to swivel the needles was statistically analyzed.
RESULTS
The swivel-resistant grasper offers greatly improved resistance to swivel (p = 0.01) when the needle is not held transversely.
CONCLUSIONS
The four-point contact afforded by the modified needle graspers imparts improved needle retention and resistance to swivel.
背景
手术针通常使用专用的握持器械来夹持。当要穿刺的组织具有弹性，或者握持力较小时，针可能会旋转，导致其偏离预定路径，从而使组织对合不理想。当针不是横向夹在钳口中时，针的旋转尤为普遍，但在手术过程中很难保持横向握持。因此提出了一种改进的抗旋转抓持器设计。
方法
对传统抓持器和抗旋转抓持器进行测试，以量化抗旋转设计的优势。将固定在抓持器中的针反复撑开，直到发生旋转。对使针旋转所需的扭矩进行统计分析。
结果
当针不是横向夹持时，抗旋转抓持器的抗旋转能力有了显著提高（p = 0.01）。
结论
改进后的针抓持器提供的四点接触提高了针的固定能力和抗旋转能力。
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