Hinged Scar Subcision Device With Retractable Cutting Edge
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Solution Overview
Problem
Conventional methods for subdermal dissection of scar tissue, particularly in treating larger scars like burn scars, are inefficient and unsafe due to the use of blunt dissection instruments that require multiple entry points and lack a sharp blade for precise incision, leading to unnecessary tissue injury and potential open wounds.
Innovation Solution
A scar subcision device with a hinge mechanism, featuring a blunt distal end and a proximal-facing cutting edge that transitions between retracted and exposed states, allowing for controlled dissection and precise incision to create space beneath a skin graft for adipocyte deposition, reducing tissue injury and improving treatment efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional blunt dissection instruments are used to create space beneath skin graft, then the instruments can be introduced through small stab incisions, but multiple entry points are required and tissue injury increases leading to potential open wounds
Solution Approach 1:
The instrument is divided into distinct functional segments: a sharp blade portion for precise incision and a blunt dissection portion for safe tissue separation. This segmentation allows each part to perform its specialized function optimally - the sharp blade creates clean incisions with minimal trauma, while the blunt portion safely separates tissue planes without causing unnecessary injury, thereby resolving the contradiction between reducing tissue injury and maintaining simple instrument design.
Solution Approach 2:
The instrument incorporates a movable blade mechanism that can transition between retracted and extended positions. When the blade is retracted, the instrument presents a streamlined profile for safe introduction through incisions. When extended, the sharp blade is positioned to perform precise cutting. This dynamic configuration allows the instrument to adapt its form to different operational phases, reducing tissue injury during insertion while enabling effective dissection during operation.
2Productivity
If conventional instruments with limited length are used for scar subcision, then the instruments can be safely introduced, but multiple entry points are necessary reducing treatment efficiency
Solution Approach 1:
The instrument features non-uniform distribution of functional properties along its length. The distal portion incorporates a sharp blade for effective scar tissue cutting, while the proximal portion maintains a smoother configuration for safe navigation and introduction. This local differentiation of qualities allows the instrument to achieve greater effective length for treating extensive scars without proportionally increasing the risk across its entire structure, thereby improving productivity without compromising safety.
3Ease of operation
If blunt dissection is used exclusively to create space beneath skin graft, then the procedure is simple to perform, but unnecessary tissue injury occurs which may lead to open wounds
Solution Approach 1:
The instrument merges two previously separate functions into a single device: sharp cutting capability and blunt dissection capability. The sharp blade portion enables precise incisions to release fibrous attachments, while the blunt portion safely creates separation planes. By combining these functions in one instrument, the procedure remains simple to perform (maintaining ease of operation) while eliminating the need to choose between sharp and blunt methods, thereby preventing unnecessary tissue injury.
Data Source
AI summary
A scar subcision devices comprising a first elongated element comprising a pivotal connection to a second elongated element, the first elongated element having a blunt distal end, the second elongated element having a proximal-facing cutting edge at a distal end thereof, the device having a first state wherein the cutting edge is retracted to a location within an outer perimeter of the first elongated element, and a second state wherein the cutting edge is exposed outside of the outer perimeter of the first elongated element and the device transitioning between the first state and the second state by the first elongated element and the second elongated element rotating relative to each other about the pivotal connection are disclosed. Methods are also disclosed.