Surgical Retractor Gel Pad Sealing Mechanism
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Solution Overview
Problem
Existing surgical retractors face challenges in effectively retracting and sealing surgical incisions or body openings, particularly in maintaining a secure seal and accommodating varying body types and sizes during laparoscopic procedures.
Innovation Solution
A surgical retractor system comprising a noncompliant outer ring with a unique oval cross-sectional shape and a flexible, impermeable sleeve, coupled with a gel cap for sealing, allows for secure retraction and sealing of incisions or body openings, preventing gas leakage and facilitating instrument access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional surgical retractor is used to retract and seal surgical incisions, then the incision can be held open, but reliable sealing and prevention of gas leakage cannot be achieved
Solution Approach 1:
The patent combines the retraction function and sealing function into a single integrated device. The retractor includes an outer ring that provides both the retraction force to hold the incision open and the sealing surface to prevent gas leakage, eliminating the need for separate retraction and sealing devices.
Solution Approach 2:
The outer ring is constructed from composite materials with different hardness levels - a harder outer surface for sealing and a softer inner surface for comfortable tissue contact. This composite structure enables the single component to simultaneously achieve reliable sealing and effective retraction.
2Stability of the object's composition
If a rigid retractor structure is used to maintain incision shape, then structural stability is achieved, but adaptation to varying body types and sizes is limited
Solution Approach 1:
The retractor features non-uniform hardness distribution - the outer surface is harder for structural stability and sealing, while the inner surface contacting tissue is softer for comfort and adaptation. This local quality variation allows the single structure to simultaneously provide stability and adaptability.
Solution Approach 2:
The retractor incorporates flexible elements and adjustable components that allow the structure to dynamically adapt to different body types and incision sizes while maintaining overall structural stability during the surgical procedure.
3Adaptability or versatility
If a soft, flexible retractor is used to accommodate body variations, then adaptability improves, but structural stability and sealing capability deteriorate
Solution Approach 1:
The retractor features non-uniform hardness distribution - the outer surface is harder for structural stability and sealing, while the inner surface contacting tissue is softer for comfort and adaptation. This local quality variation allows the single structure to simultaneously provide stability and adaptability.
Solution Approach 2:
The retractor incorporates composite materials with different mechanical properties in different regions - harder materials for structural components needing stability and softer materials for portions contacting tissue, enabling both adaptability and structural integrity.
4Adaptability or versatility
If multiple separate components are used for retraction and sealing, then functional versatility is achieved, but device complexity and ease of operation worsen
Solution Approach 1:
The patent combines the retraction function and sealing function into a single integrated device. The retractor includes an outer ring that provides both the retraction force to hold the incision open and the sealing surface to prevent gas leakage, eliminating the need for separate retraction and sealing devices.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides reliable, adjustable retraction and sealing of surgical incisions or body openings, maintaining pneumoperitoneum and allowing continuous access and visibility during procedures, while accommodating different body types and sizes.
Implementation Method 1
The outer ring of the surgical retractor embeds into the gel pad and displaces the gel, thereby forming a seal between the gel pad and the outer ring and sleeve of the surgical retractor
Data Source
AI summary
A surgical access device has a surgical retractor having a noncompliant outer ring with an annular axis, an inner ring, and a sleeve coupling the outer ring to the inner ring. The noncompliant outer ring is adapted to roll over itself around the annular axis to roll the sleeve around the outer ring to retract and seal an opening in a biological body wall. The access device may include a lid adapted for being coupled to the noncompliant outer ring of the surgical retractor. The outer ring of the surgical retractor has a cross-sectional shape that prohibits the lid from being partially or incorrectly coupled to the outer ring of the surgical retractor.