Xiaojian Cao,Haijun Li,Jian Tang,Lipeng Yu,Hao Xie,Lei Yang
申请号：
US14441116
公开号：
US09510873B2
申请日:
2013.11.13
申请国别(地区):
US
年份:
2016
代理人:
摘要：
A guiding apparatus for x-ray-free screw placement by a spinal posterior approach, comprising an interspinous spacer, a slide scale (1), and an angle-changing rod. The apparatus is simple to operate, easy to grasp, and well accepted by physicians. A reliable effect is provided in screw placement. Significantly reduced X-ray exposure is allowed for patients and medical staff. In a small-incision minimally invasive screw placement operation, even without exposing the spinal ligament, a small spike-like protrusion of a base (2) of the interspinous spacer can ensure accurate interspinous positioning across the skin. This is applicable for both minimally invasive and incision surgeries and has a wide range of uses.
