Guiding apparatus for X-ray-free screw placement by spinal posterior approach

US9510873B2 · kind B2 · utility

Assignee

• THE FIRST AFFILIATED HOSPITAL OF NANJING MEDICAL UNIVERSITY · CN

Inventors

• Xiaojian Cao · 安丰镇, CN
• Haijun Li · 安丰镇, CN
• Jian Tang · Beijing, CN
• Lipeng Yu · 安丰镇, CN
• Hao Xie · 安丰镇, CN
• Lei Yang · Shanghai, CN

Key dates

• Filing date: Nov 13, 2013
• Grant date: Dec 6, 2016
• Expiry date: Nov 13, 2033

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B17/8872
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

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.