Adjustable skin mesher device and a system for using the same
First Claim
1. An adjustable skin graft preparation device for producing a predetermined pattern of incisions comprising a plurality of incisions having a predetermined length, said device comprising:
- (a) at least one feeding drum rotatably mounted in said device;
(b) a first axle rotatably mounted in said device comprising a plurality of first cutting discs, each said first disc comprising a plurality of circumferentially spaced first cutting edges, said first axle being in substantial parallel arrangement with said at least one feeding drum, said first cutting edges adapted to provide a first pattern of incisions;
(c) a second axle rotatably mounted in said device comprising a plurality of second cutting discs, each said second disc comprising a plurality of circumferentially spaced second cutting edges, said second axle being in substantial parallel arrangement with said at least one feeding drum, said second cutting edges adapted to provide a second pattern of incisions substantially aligned with said first pattern of incisions,wherein each said incision in said predetermined pattern of incisions is contributed by at least one corresponding said first incision and a corresponding aligned said second incision, and wherein said length of each said incision in said predetermined pattern of incisions is determined by the degree of overlap between said corresponding first incision and said corresponding second incision; and
(d) means for modulating a disposition of said first axle relative to a disposition of said second axle such as to provide said degree of overlap between said first incisions and said second incisions.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention generally relates to a skin graft preparation device, or mesher. This device is designed to incise and "mesh" a piece of skin, usually prior to grafting to allow it to expand and cover an area larger than its donor site area. More specifically, the invention relates to an adjustable mesher device wherein the mesher has an adjustable meshing drum (roller) or drums useful for the meshing of the entire range of meshing ratios, thus eliminating the need to keep various meshing devices. Another embodiment of the mesher has two consecutive meshing drums. A further embodiment of the mesher has a rotatable common holder allowing selection from a number of meshing drums. These meshers can mesh skin in both powered and manual modes of operation and may be used with most existing graft carriers or may be used without any carrier. The present invention further relates to a system for using the mesher.
85 Citations
45 Claims
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1. An adjustable skin graft preparation device for producing a predetermined pattern of incisions comprising a plurality of incisions having a predetermined length, said device comprising:
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(a) at least one feeding drum rotatably mounted in said device; (b) a first axle rotatably mounted in said device comprising a plurality of first cutting discs, each said first disc comprising a plurality of circumferentially spaced first cutting edges, said first axle being in substantial parallel arrangement with said at least one feeding drum, said first cutting edges adapted to provide a first pattern of incisions; (c) a second axle rotatably mounted in said device comprising a plurality of second cutting discs, each said second disc comprising a plurality of circumferentially spaced second cutting edges, said second axle being in substantial parallel arrangement with said at least one feeding drum, said second cutting edges adapted to provide a second pattern of incisions substantially aligned with said first pattern of incisions, wherein each said incision in said predetermined pattern of incisions is contributed by at least one corresponding said first incision and a corresponding aligned said second incision, and wherein said length of each said incision in said predetermined pattern of incisions is determined by the degree of overlap between said corresponding first incision and said corresponding second incision; and (d) means for modulating a disposition of said first axle relative to a disposition of said second axle such as to provide said degree of overlap between said first incisions and said second incisions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An adjustable skin graft preparation device for producing a predetermined pattern of incisions comprising a plurality of incisions having a predetermined length, said device comprising:
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a first feeding drum and a first meshing drum rotatably mounted therein; means for rotating said first meshing drum and said first feeding drum; said first feeding drum being in substantial parallel arrangement with said first meshing drum, said device adapted to provide a predetermined spacing between said first feeding drum and said first meshing drum; said first meshing drum characterized in comprising a plurality of pairs of cutting discs coaxially mounted on a shaft, each said pair of cutting discs comprising; a first annular disc having a substantially flat side and comprising a plurality of circumferentially spaced first cutting edges, and a second annular disc having a substantially flat side and comprising a plurality of circumferentially spaced second cutting edges; said first disc and said second disc being juxtaposed with corresponding flat sides thereof in mutual contact wherein said first cutting edges and said second cutting edges are substantially coplanar, such as to provide a plurality of effective cutting blades having an interval space between each pair of adjacent effective cutting blades, said effective cutting blade comprised of a corresponding said first cutting edge and a corresponding said second cutting edge, wherein an effective cutting length of said effective cutting blade is determined by the degree of angular overlap between said corresponding first cutting edge and second cutting edge; and modulation means for modulating a relative angular orientation between said first disc and said second disc of each said pair of cutting discs such as to provide a predetermined length ratio between each effective cutting blade length and a length of said interval space between adjacent effective cutting blades in each said pair of cutting discs. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification