Spinal Retractor Assembly for Single-Handed Lateral Access
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Solution Overview
Problem
Current minimally invasive surgical techniques for spinal procedures require multiple hands to operate retraction devices, necessitate precise alignment perpendicular to the spine, and often cause excessive muscular stripping and nerve damage, leading to complications and prolonged recovery.
Innovation Solution
A retractor assembly with independently manipulable blades and a spring clip system that allows single-handed operation, reduces the need for multiple hands, and maintains precise alignment, minimizing tissue trauma and nerve exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional multi-bladed retractors are used for spinal surgery, then retraction and exposure are achieved, but multiple hands are required for operation and precise alignment perpendicular to the spine is necessary
Solution Approach 1:
The retractor is divided into multiple independent blades (typically three blades) that can be manipulated separately. Each blade has its own handle and can be positioned independently, allowing the surgeon to control each blade with a different hand or the same hand in sequence, thereby enabling single-handed operation while maintaining complex retraction geometry
Solution Approach 2:
The retractor blades are arranged in a triangular configuration that provides stability and retraction in multiple dimensions. The blades extend radially outward from a central hub, creating a three-dimensional retraction structure that maintains alignment perpendicular to the spine while allowing flexible manipulation from a single control point
2Adaptability or versatility
If extended retraction is performed to create lateral access to the spine, then surgical access is improved, but excessive muscular stripping and nerve damage occur
Solution Approach 1:
The retractor blades are designed with varying widths and shapes to match the specific anatomical structures being retracted. The blades can be selectively positioned to contact only the necessary tissues for exposure, minimizing contact with and damage to surrounding muscles and nerves. The distal ends of the blades feature smooth, rounded surfaces to reduce tissue irritation
Solution Approach 2:
The retractor system allows for dynamic adjustment of blade positions and angles during surgery. The independent handles enable the surgeon to fine-tune the retraction force and direction in real-time, adapting to anatomical variations and minimizing tissue trauma while maintaining adequate exposure
3Reliability
If multiple hands are used to operate retraction devices, then control and stability are improved, but surgical efficiency and productivity are reduced
Solution Approach 1:
The control functions of multiple hands are merged into a single hub structure with multiple independent handles. This allows the surgeon to maintain control over all retractor blades from one central location, combining the stability and control benefits of multi-handed operation with the efficiency of single-handed manipulation. The hub acts as a common control point for all blades
Solution Approach 2:
The retractor design allows the surgeon to self-adjust and self-stabilize the device during operation. The independent handles enable the surgeon to make real-time adjustments to blade positions and retraction forces without requiring assistance from additional personnel, making the system self-sufficient and improving surgical workflow
Data Source
AI summary
A retractor assembly and minimally invasive surgical techniques and implants. Such embodiments include techniques and implants for provision of therapy to a spine from a lateral approach. Embodiments of the invention include minimally invasive surgical techniques using one or more extended retractors to create an extended access route such as the non-limiting example of lateral access to the spine.