Circumferential Retractor Segmentation for Limited-Space Access
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Solution Overview
Problem
Surgical instruments face challenges in limited working space within body cavities, especially with small incisions, leading to reduced instrument triangulation and limited visibility, and existing retractors provide insufficient support and visibility in such conditions.
Innovation Solution
A circumferential retractor system comprising an outer and inner ring connected by a sheath with adjustable segments, allowing for adjustable retraction and enhanced instrument access, featuring a monolithic hourglass-shaped retainer for secure placement and visibility, and a sealing mechanism to maintain access channel integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If small retractors are used in limited space procedures, then the incisions or openings can be maintained, but instrument triangulation is reduced
Solution Approach 1:
The retractor is divided into multiple segments including an outer ring, inner ring, and adjustable sheath segments that can be independently positioned and adjusted, allowing the device to maintain incisions while providing sufficient triangulation space for instruments
Solution Approach 2:
The retractor incorporates adjustable segments that can be dynamically repositioned during surgery to optimize both incision maintenance and instrument triangulation based on procedural needs
2Volume of moving object
If small retractors are used in limited space procedures, then the device can fit in small spaces, but visibility is limited
Solution Approach 1:
The retractor creates additional working space by extending structures in multiple dimensions, with the outer ring positioned outside the body cavity and the inner ring inside, effectively expanding the surgical field without increasing the initial incision size
3Force
If the upper segment length is adjusted by rolling the outer ring, then retraction force is optimized, but the structure becomes more complex
Solution Approach 1:
The outer ring can be manually rolled or rotated by the surgeon to adjust the upper segment length and optimize retraction force, eliminating the need for complex mechanical adjustment mechanisms while maintaining ease of use
Data Source
AI summary
A circumferential retractor system is provided that includes a circumferential retractor and a flexible retainer. The circumferential retractor and retainer retracts and protects a patient's body opening, providing access into a patient.