Methods and devices for skin tightening
The present invention relates to methods and devices for skin tightening after incising or excising tissue portions from a subject. Exemplary methods and devices include tunable dressings having an adhesive layer and a regulatable layer or an un-stretched layer that responds to one or more external stimuli to contract or expand the dressing, where the contraction or expansion can be uniform or non-uniform.
1. A system for skin tightening comprising:
a plurality of tubes configured to contact a surface of skin to generate holes in skin tissue by excising portions of the skin tissue;
a first actuator configured to rotate and/or translate the plurality of tubes relative to the skin tissue;
a suction or pressure system configured to facilitate removal of the tissue portions from the plurality of tubes; and
a dressing affixable to a skin region comprising a plurality of the excised tissue portions,
wherein the dressing is configured to provide contraction or expansion of said skin region in one or more directions, and
wherein at least one of said excised tissue portions has at least one dimension that is less than 2 mm.
2. The system according to claim 1 , wherein the dressing is configured to exert compression or expansion in one or more of an x, y, or z direction.
3. The system according to claim 2 , wherein the dressing is configured to exert compression or expansion in a direction perpendicular to one or more Langer lines of a patient.
4. The system according to claim 1 , wherein the at least one of said excised tissue portions has at least one dimension that is less than 1 mm.
5. The system according to claim 1 , wherein at least one of said plurality of said excised tissue portions has a length of more than 1 mm.
6. The system according to claim 1 , wherein an areal fraction of excised tissue portions is less than about 70% of the skin region.
7. The system according to claim 1 , wherein an areal fraction of excised tissue portions is less than about 10% of the skin region.
8. The system according to claim 1 , further comprising a stop arrangement to control a depth of the excision and/or the length of the excised tissue portions, wherein the stop arrangement is adjustable along a long axis of at least one of the plurality of tubes to control the depth of excision in the skin.
9. The system according to claim 1 , wherein at least one of said excised tissue portions has a length of more than 1 mm.
10. The system according to claim 1 , wherein the plurality of tubes comprises nine tubes.
11. The system according to claim 1 , wherein said plurality of excised tissue portions comprise one or more circular or elliptical holes in said skin region.
12. The system according to claim 1 , wherein the dressing comprises a moisture absorption layer.
13. The system according to claim 1 , wherein the dressing is porous.
14. The system according to claim 1 , wherein the skin region is located on a face, eyelid, cheek, chin, forehead, lips, nose, neck, chest, arm, leg, and/or a back.
15. The system according to claim 1 , further comprising one or more sensors configured to detect a position of one or more tubes of the plurality of tubes.