Pixel Array Dermatome Scalpet Array for Fractional Skin Resection
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Solution Overview
Problem
Current surgical methods for managing skin laxity and burns often result in visible scarring, prolonged healing times, and limitations in skin graft harvesting, particularly due to the need for extensive incisions and donor site deformities.
Innovation Solution
The development of a Pixel Array Dermatome (PAD) system that enables fractional resection and skin grafting with minimal scarring by using a scalpet array to create small, pixelated skin plugs which are harvested and applied to a semi-porous adherent membrane, allowing for repeated harvesting and reduced donor site deformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional surgical methods are used for skin laxity management, then skin tightening is achieved, but visible scarring occurs
Solution Approach 1:
The patent applies segmentation by dividing the continuous skin tissue into discrete pixel-sized segments (0.5-4.0 mm diameter). The scalpet array creates multiple small circular defects throughout the treatment area rather than one large incision. This segmentation allows the skin to be tightened through contraction of numerous small wounds while avoiding the visible linear scar characteristic of traditional excisional surgery.
Solution Approach 2:
The patent implements local quality by creating fractionated treatment zones where only specific pixelated portions of the skin are resected at any given time. The scalpet array allows selective targeting of treatment areas, with some pixels removed and others spared, creating a mosaic pattern of healing that minimizes overall visible scarring while achieving cumulative tightening效果.
2Shape
If extensive incisions are made for skin resection, then skin laxity is corrected, but healing time is prolonged
Solution Approach 1:
By segmenting the resection into numerous small pixel defects rather than large continuous incisions, each individual pixel wound heals more rapidly. The small size (0.5-4.0 mm) of each defect allows for faster epithelialization and tissue regeneration, reducing overall healing time while achieving the same skin tightening effect through cumulative contraction of multiple small wounds.
Solution Approach 2:
The patent employs partial action by removing only a fraction of skin pixels at each treatment session rather than excising large continuous areas. This fractionated approach allows the patient to undergo multiple treatment sessions with shorter intervals, as each session involves minimal tissue trauma that heals quickly, whereas a single large excision would require prolonged healing.
3Quantity of substance
If traditional skin graft harvesting is performed, then skin defects are covered, but donor site deformity occurs
Solution Approach 1:
The patent applies segmentation to skin graft harvesting by creating pixel-sized donor sites distributed across the donor area rather than harvesting from a single large site. Each pixel defect (0.5-4.0 mm) is too small to create visible deformity, and the fractionated distribution across multiple locations prevents concentrated scarring. This allows harvesting of sufficient skin graft material while maintaining cosmetic appearance of the donor site.
Solution Approach 2:
The patent implements local quality by selecting specific localized pixel areas for graft harvesting rather than large continuous donor sites. The scalpet array allows selective targeting of donor regions, creating a mosaic pattern of small extraction sites that heal with minimal visible scarring, thereby providing adequate graft material while preserving donor site aesthetics.
4Quantity of substance
If repeated skin graft harvesting is needed, then adequate skin coverage is achieved, but donor site damage accumulates
Solution Approach 1:
The patent applies discarding and recovering by allowing the donor site to recover through healing of pixel defects between harvesting sessions. The small pixel wounds heal rapidly, restoring the donor site appearance, which then allows for subsequent harvesting sessions. This cycle of harvesting and recovery can be repeated multiple times to accumulate sufficient graft material without permanent deformity, as each session's damage is temporary and reversible.
Solution Approach 2:
The patent implements periodic action by spacing skin graft harvesting sessions to allow healing intervals between treatments. The fractionated pixel approach enables treatment cycles where harvesting is followed by a recovery period during which the pixel defects heal, then subsequent harvesting can occur from the same or different donor areas. This periodic harvesting-recovery cycle allows accumulation of adequate graft quantity without permanent donor site deformity.
Data Source
AI summary
Systems, instruments, and methods for minimally invasive procedures including one or more of fractional resection, fractional lipectomy, fractional skin grafting, fractional scar revision, and/or fractional tattoo removal are described. Embodiments include instrumentation comprising a scalpet assembly coupled to a carrier, and the scalpet assembly includes a scalpet array. The scalpet array includes one or more scalpets configured for fractional resection, fractional lipectomy, fractional skin grafting, fractional scar revision, and/or fractional tattoo removal. The system includes a vacuum component coupled to the scalpet assembly and configured to evacuate tissue from the a site. The carrier is configured to control application of a rotational force and/or a vacuum force to the scalpet assembly.