Multi-Prong Surgical Retractor with Ratcheting Lock
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Solution Overview
Problem
Traditional surgical retractors either require continuous manual hold, diverting the surgeon's attention, or only allow retraction in one direction, limiting access and visibility during surgical procedures.
Innovation Solution
A multi-prong surgical retractor design featuring a first and second retractor arm that pivot about a single axis, coupled with a third retractor arm that moves in tandem, and a retractor body with a ratcheting mechanism to securely engage the third retractor arm, allowing for synchronized movement and adjustable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single-finger retractor is used, then the retractor can be manually held, but the surgeon's attention is diverted from other critical tasks
Solution Approach 1:
The retractor is divided into multiple independent arms (first retractor arm, second retractor arm, third retractor arm) that can function independently or in coordination. This segmentation allows the retractor to maintain stability through distributed support points while reducing the need for continuous manual intervention at any single location.
Solution Approach 2:
The retractor incorporates a self-locking mechanism through the ratcheting mechanism that engages the third retractor arm, allowing the device to maintain its position automatically without requiring continuous manual hold. The system serves itself by using the movement of the first and second arms to automatically position and lock the third arm.
2Ease of operation
If a two-finger retractor is used, then the retractor arms can be locked in place without continuous manual hold, but the retractor only works in one direction
Solution Approach 1:
The retractor system transitions from two-dimensional operation (two arms pivoting about a single axis) to three-dimensional operation by adding a third retractor arm that moves in tandem with the first two arms. This third dimension enables the retractor to achieve stable positioning and self-locking while maintaining the ability to retract in multiple directions through the coordinated movement of all three arms.
Solution Approach 2:
The retractor is designed to perform multiple functions: it can retract tissues in various directions, maintain stable positioning through self-locking, and adapt to different surgical needs. The third retractor arm provides additional functionality by enabling multi-directional retraction while working in coordination with the first two arms.
3Adaptability or versatility
If a multi-prong retractor with third arm is added, then retraction in multiple directions is enabled, but the device complexity increases
Solution Approach 1:
The first, second, and third retractor arms are merged into a single integrated system where the arms move in tandem with each other. The ratcheting mechanism merges the locking function with the positioning function, allowing all three arms to be controlled through a unified mechanism rather than requiring separate control systems for each arm.
Solution Approach 2:
The retractor arms are nested within a common retractor body structure, with the third retractor arm positioned within the retractor body and operatively coupled to the first and second arms. This nesting arrangement allows the additional arm to be integrated into the existing structure without requiring a complete redesign, thereby limiting the increase in overall device complexity.
Data Source
AI summary
A surgical retractor including a first retractor arm, a second retractor arm, and a third retractor arm coupled with the first retractor arm and the second retractor arm to move in tandem therewith is disclosed. The first retractor arm and the second retractor arm pivot about a single axis of the surgical retractor.