Interspinous Implant with Lateral Retainer for Minimally Invasive Spine Surgery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing interspinous implants face challenges in achieving stability and minimizing invasiveness during implantation, often requiring removal of ligaments and large approach paths, which can destabilize the vertebral column and increase surgical complexity.
Innovation Solution
An interspinous implant design featuring a body with wings extending along lateral faces of spinous processes and a retainer inserted from the same lateral face, allowing for unilateral posterior approach without dissection of the supraspinous ligament, minimizing damage and facilitating stable installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lateral wings are used to confer stability to the implant, then stability is improved, but the bulk of the implant increases making implantation more invasive and preventing multi-level surgery
Solution Approach 1:
The implant is divided into separate components: a body and a retainer. The body provides stability through its dimensions while the retainer is a separate element that can be inserted through the same lateral face, enabling multi-level surgery without increasing overall bulk.
Solution Approach 2:
The retainer is designed to be inserted through the same lateral face as the body, utilizing a different dimensional approach (unilateral posterior approach) rather than requiring bilateral access, thus reducing invasiveness while maintaining stability.
2Ease of operation
If a large approach path is used for implantation, then ease of implantation is improved, but surgical trauma increases and ligament integrity is compromised
Solution Approach 1:
The implant components (body and retainer) are designed to be inserted separately through a limited approach path, avoiding the need for large incisions or extensive dissection of the supraspinous ligament.
Solution Approach 2:
The retainer acts as an intermediary element that facilitates stable implantation through a minimally invasive approach, allowing the body to be positioned correctly without requiring extensive surgical exposure.
3Ease of operation
If ligaments are removed to facilitate implantation, then ease of implantation is improved, but vertebral column stability is compromised
Solution Approach 1:
The retainer is designed to be inserted first through the same lateral face, preparing the path and establishing stability before the body is inserted, eliminating the need for ligament removal.
Solution Approach 2:
The implant design allows self-retention through the retainer body interaction without requiring ligament removal or additional stabilization measures, preserving vertebral column integrity.
Data Source
AI summary
The present invention relates to an interspinous implant (1), intended to be implanted between two adjacent dorsal spines (EI, ES), each including an upper edge (E2), a lower edge (E3) and two opposed lateral faces (E4, E5), wherein the implant (1) includes at least one body (10) with dimensions arranged so as to maintain or restore a distance between the adjacent edges (E2, E3) of the two spinous processes (EI, ES) and including at least two wings (11, 12) extending so that at least a part of each wing (11, 12) lies along at least a part of one lateral face (E4, E5) of one of the two spinous processes (EI, ES) and, additionally, at least one retainer (2, 3, 4, 7, 111, 121, 221, 24, 28, 29, L, 90) for the implant, designed to retain the body (10) of the implant between the two spinous processes and to be inserted from the same lateral face as the body (10).