Modular Tissue Retractor With Pivoting Cannulas for Spinal Access
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Solution Overview
Problem
Existing surgical retractors lack the flexibility and precision needed for various spinal surgical approaches, particularly for accessing and visualizing surgical sites in anterior, lateral, and oblique techniques, which are crucial for treating spinal disorders such as degenerative disc disease and other curvature abnormalities.
Innovation Solution
A modular retractor system with customizable blades, extendable arms, and a quick connect and release coupler for securing to a table mount, which includes a distraction mechanism with pivoting members and a dual actuator system for controlled dilation and retraction of tissues and anatomical structures, allowing for various surgical approaches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed, non-modular retractor design is used, then the device structure is simple, but the adaptability to various surgical approaches (anterior, lateral, oblique) is limited
Solution Approach 1:
The retractor system is divided into modular components including interchangeable blades, adjustable arms, and detachable connection elements. Each blade can be independently selected and attached to the retractor frame, allowing customization for different surgical approaches (anterior, lateral, oblique) without requiring a completely different device.
Solution Approach 2:
The retractor frame and arm mechanisms are designed with universal connection interfaces and adjustable positioning capabilities that allow the same base structure to accommodate multiple blade types and configurations, enabling a single device to perform multiple surgical functions across different approaches.
2Manufacturing precision
If blades are fixed in position, then the device structure is simple, but the precision of surgical site access and visualization is insufficient
Solution Approach 1:
The blades are designed with adjustable and movable mounting mechanisms that allow precise positioning at multiple angles and locations. The arms connecting the blades to the retractor frame can be independently adjusted and locked at specific positions, enabling precise surgical site access while maintaining structural integrity.
Solution Approach 2:
Traditional fixed mechanical blade mounting is replaced with adjustable mechanical interfaces including threaded adjustments, pinned connections, and friction-based locking mechanisms that allow precise blade positioning without requiring complex actuation systems.
3Ease of operation
If traditional retraction methods are used, then the device structure is simple, but the controlled dilation and retraction of tissues is insufficient
Solution Approach 1:
The retractor arms and blades incorporate self-adjusting mechanisms with spring-loaded tensioning elements and friction-based locking features that automatically maintain optimal retraction force and position without requiring continuous external actuation, simplifying operation while providing controlled tissue dilation.
Data Source
AI summary
A retractor system may include a modular retractor having a longitudinal axis extending in a longitudinal direction and a lateral axis extending from a first lateral end to a second lateral end in a lateral direction. The modular retractor may also include a body portion that houses a distraction mechanism, a first arm, and a second arm. A first pivoting member may be coupled to a distal end of the first arm and a second pivoting member may be coupled to a distal end of the second arm. A first attachment mechanism may be coupled to the first pivoting member and may support a first pin receiving cannula. A second attachment mechanism may be coupled to the second pivoting member and support a second pin receiving cannula. An may be actuator operably coupled to the distraction mechanism for opening and closing the first arm and the second arm.