Dynamic Skin Flap Retractor with Self-Retaining Spring Tension
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Solution Overview
Problem
Existing surgical retractors require manual assistance for skin flap retraction, leading to uneven tension, prolonged operative time, and increased risk of flap necrosis due to inadequate blood supply and seroma formation, especially in surgeries like ilio-inguinal block dissection and mastectomy.
Innovation Solution
A self-retaining skin flap retraction device with a precurved solid block and malleable arms, equipped with a spiral torsion spring system, provides dynamic and uniform traction, allowing the surgeon to manipulate the retractor's size and angle without assistant support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual retraction using skin hooks is used, then the surgical field can be exposed, but the tension applied is uneven and requires prolonged assistant manipulation leading to faulty flap thickness
Solution Approach 1:
The retractor device is self-retaining and self-adjusting, eliminating the need for continuous manual manipulation by an assistant. The spring mechanism automatically maintains uniform tension on the skin flap throughout the surgical procedure, ensuring consistent flap thickness without requiring skilled assistant intervention.
Solution Approach 2:
The device incorporates a spring mechanism that provides dynamic adjustment capability, allowing the retraction force to adapt automatically to different tissue tensions and surgical stages. This dynamic system ensures uniform tension distribution across the flap while accommodating variations in surgical conditions.
2Illumination intensity
If rigid hand-held retractors are used, then visual and operative access can be provided, but continuous manipulation is required which prolongs operative time
Solution Approach 1:
The self-retaining design allows the retractor to maintain surgical field exposure automatically without requiring continuous manipulation by an assistant. The device holds itself in position and maintains retraction force throughout the procedure, significantly reducing operative time while preserving adequate surgical field visibility.
Solution Approach 2:
The spring mechanism provides continuous retraction force throughout the entire surgical procedure without interruption or need for repositioning. This continuous action maintains consistent surgical field exposure from incision to closure, eliminating gaps in useful action and reducing overall operative time.
3Device complexity
If a single rigid retracting assembly is used, then device simplicity is maintained, but it cannot adapt to varying breast sizes and shapes
Solution Approach 1:
The device incorporates malleable arms that can be manually bent and shaped to conform to different anatomical configurations. The spring mechanism provides dynamic adjustment capability, allowing the retraction force and arm positioning to be customized for each patient's specific breast size, shape, and surgical requirements, achieving high adaptability without excessive complexity.
Solution Approach 2:
The retractor allows adjustment of multiple parameters including arm angle, retraction force magnitude, and contact point positioning. These parameters can be modified to match varying anatomical conditions, enabling the same device structure to adapt to different breast sizes and shapes through parameter adjustment rather than requiring multiple specialized devices.
4Device complexity
If frequent realigning and repositioning is required, then initial device design may be simple, but surgical efficiency is reduced
Solution Approach 1:
The self-retaining design with spring mechanism automatically maintains retraction force and device positioning throughout the surgical procedure. The device compensates for tissue relaxation and surgical manipulation automatically, eliminating the need for frequent realigning or repositioning by the assistant, thereby maintaining high surgical efficiency without complex adjustment mechanisms.
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
Enables continuous, uniform, and dynamic skin flap retraction, reducing the need for manual assistance, minimizing flap necrosis and seroma formation, and enhancing surgical efficiency.
Implementation Method 1
equipped with a spiral torsion spring system, provides dynamic and uniform traction
Data Source
AI summary
Skin flap retraction device. The self-retaining retractor device (100) can provide appropriate, adequate, and dynamic traction during a surgical procedure that involves skin flap elevation. The self-retaining dynamic surgical retractor device (100) employs a precurved detachable solid block (20) and malleable arm assembly (22 and 24) that can be used for various surgeries involving raising skin flaps and places that need a dynamic yet gentle traction, for example, during a mastectomy procedure, which typically requires raising of skin flaps.