Spiral Blade Spinal Retactor for Complete Tissue Separation
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Solution Overview
Problem
Current surgical retractors for lateral spine surgery are costly due to complexity, and they fail to completely separate the surgical site from surrounding tissues, increasing the risk of soft tissue injury during procedures.
Innovation Solution
A multi-blade surgical retractor system with a circumferential blade arrangement that spirally contracts and expands, ensuring no gaps between blades for complete tissue separation and distributing retraction force evenly, along with a protective sleeve to prevent tissue encroachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multi-blade retractors are used to achieve complete tissue separation, then surgical site protection is improved, but device complexity and cost increase
Solution Approach 1:
The retractor is divided into multiple individual blades (typically 3-4 blades) that can be independently positioned and adjusted. Each blade can be separately manipulated to achieve complete circumferential tissue separation, allowing the surgeon to optimize the configuration for complete isolation of the surgical site while maintaining manageable complexity through modular design
Solution Approach 2:
The multiple blades are nested within a common frame structure, with each blade housed in its own slot or guide. The blades can be inserted and removed independently while remaining part of the integrated retractor system, combining the benefits of complete tissue separation with simplified manufacturing and sterilization processes
2Reliability
If traditional multi-blade retractors are used to achieve complete tissue separation, then surgical site protection is improved, but manufacturing cost increases
Solution Approach 1:
The retractor is divided into multiple individual blades (typically 3-4 blades) that can be independently positioned and adjusted. Each blade can be separately manipulated to achieve complete circumferential tissue separation, allowing the surgeon to optimize the configuration for complete isolation of the surgical site while maintaining manageable complexity through modular design
Solution Approach 2:
The multiple blades are nested within a common frame structure, with each blade housed in its own slot or guide. The blades can be inserted and removed independently while remaining part of the integrated retractor system, combining the benefits of complete tissue separation with simplified manufacturing and sterilization processes
3Ease of operation
If conventional retractors are used to retract tissues, then surgical access is achieved, but soft tissue injury risk increases due to concentrated retraction force
Solution Approach 1:
The retractor is divided into multiple individual blades (typically 3-4 blades) that can be independently positioned and adjusted. Each blade can be separately manipulated to achieve complete circumferential tissue separation, allowing the surgeon to optimize the configuration for complete isolation of the surgical site while maintaining manageable complexity through modular design
Solution Approach 2:
Different blades can be positioned at different depths and angles to create non-uniform retraction forces tailored to the specific anatomical structures being retracted. The blade tips can be shaped differently to distribute pressure locally, reducing the risk of concentrated force causing tissue injury while maintaining effective surgical access
Data Source
AI summary
An apparatus and methods for a spinal retractor utilizing spirally retracting blades to provide a surgical portal. The retractor system comprises a blade assembly and mechanism to open and close the blades. The blade assembly comprises a set of blades arranged in a mostly circular formation coupled to an actuator. The retractor system utilizes a mechanism such as a slot-and-follower to actuate the blades in a spiral motion. Each blade in the blade assembly maintains tangential contact to each adjacent blade during expansion and contraction of the device. The circumferential retractor blade arrangement completely separates the soft tissue being retracted from the surgical portal being created allowing for the surgical site to be free from any encroaching internal tissue.