Pixel Array Dermatome Scalpet Device for Scarless Skin Grafting
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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 the extent of skin grafting due to the need for extensive incisions and donor site deformities.
Innovation Solution
The development of a Pixel Array Dermatome (PAD) system that uses a scalpet device with a scalpet array to create small, incised skin pixels which are harvested onto an adherent membrane, allowing for fractional resection and grafting without visible scarring, enabling repeated harvesting from the same donor site and minimizing donor site deformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional surgical methods are used to resect redundant lax skin, then skin tightening is achieved, but visible scarring and donor site deformities occur
Solution Approach 1:
The patent divides the continuous skin resection into discrete pixel-sized segments (0.5-4.0mm diameter). The scalpet array creates multiple small circular incisions that are so fine they heal without visible scarring, while collectively achieving the skin tightening effect. This segmentation transforms the harmful continuous scar into invisible discrete points.
Solution Approach 2:
The invention applies different treatment qualities to different areas: pixelated resection for visible areas (face, neck) versus traditional methods for hidden areas. The scalpet array allows selective fractional resection where only portions of skin are removed, preserving local skin architecture and enabling primary healing without visible scars in cosmetically sensitive regions.
2Quantity of substance
If extensive incisions are made for skin grafting, then large areas of skin defects can be covered, but healing time is prolonged
Solution Approach 1:
The patent segments the skin graft into pixel-sized units that are harvested from the donor site using the scalpet array. These small pixel grafts are applied to the recipient site and heal through primary intention rather than secondary intention, dramatically reducing healing time from weeks to days while maintaining coverage of large defect areas.
Solution Approach 2:
The donor site is prepared in advance by creating pixelated incisions with the scalpet array before graft harvest. This preliminary pixelation creates optimal conditions for rapid healing and allows the donor site to be closed primarily, reducing overall treatment time and enabling same-day or next-day graft application.
3Quantity of substance
If traditional dermatome methods are used for skin harvesting, then large sheets of skin can be obtained, but donor site deformities are created
Solution Approach 1:
Instead of harvesting a continuous sheet of skin that leaves a large linear scar, the patent uses the scalpet array to create multiple small circular incisions that harvest pixel-sized grafts. The donor site heals with numerous tiny punctate scars that are invisible from a distance, maintaining cosmetic appearance while providing sufficient graft material for large defect coverage.
Solution Approach 2:
The invention preserves local skin architecture at the donor site by removing only small pixelated portions rather than large continuous sheets. This allows the majority of the donor site to maintain its normal appearance and structure, with only minimal pixelated changes that heal without deformity.
4Quantity of substance
If repeated skin grafting is performed from the same donor site, then sufficient graft material can be obtained for extensive burns, but traditional methods cannot accommodate multiple harvests
Solution Approach 1:
The patent enables recovery and reuse of the donor site after each harvest. The pixelated resection pattern allows the donor site to heal rapidly through primary intention, and the same site can be used for multiple subsequent graft harvests. This recovering principle transforms a single-use donor site into a renewable resource for treating extensive burns and skin defects.
Solution Approach 2:
The segmented pixelated approach distributes the harvest across many small locations rather than one large area, allowing the donor site to heal in between harvests. This segmentation enables multiple harvesting sessions from the same donor site, providing sufficient graft material for extensive body surface area coverage in burn patients.
Data Source
AI summary
Systems, instruments, and methods are described in which a scalpet device comprises a housing configured to include a scalpet assembly. The scalpet assembly includes a scalpet array and one or more guide plates. The scalpet array includes a set of scalpets, and in embodiments the set of scalpets include multiple scalpets. The guide plate maintains a configuration of the set of scalpets. The set of scalpets is configured to be deployed from and retracted into the housing, and is configured to generate incised skin pixels at a target site when deployed. The incised skin pixels are harvested.