DR. JEROME MARVIN FELSENSTEIN, M.D.
Dermatology at Highland Ave, Crotonville, NY

6447503, Sep 10, 2002

Nov 1, 2000

09/606351

James Jeffrey Wynne - Mount Kisco NY
Stephen Henry Gomory - Tarrytown NY
Jerome Marvin Felsenstein - Ossining NY

International Business Machines Corporation - Armonk NY

A61B 1818

606 9, 606 10, 606 12

A laser system (called a UV Dermablator) and method that enables a clean, precise removal of skin while minimizing collateral damage to the skin underlying the treated region. The depth of ablation can be controlled via feedback from the physiology of the skin, namely the infusion of blood into the area of excision when skin has been ablated to a sufficient depth to produce bleeding. A second laser, such as a uv light source with a different wavelength, to penetrate the blood, heating it sufficiently to coagulate the blood. Other features provide precise control, permitting the epidermis to be removed down to the papillary dermis, following the undulations of the papillary dermis. This lateral and depth control may be accomplished by using careful observation, assisted by spectroscopic detection, to identify when the epidermis has been removed, exposing the underlying dermis, with spatial resolution appropriate for the spacing of the undulations of the papillary dermis. Yet other features which provide a feedback control mechanism which utilizes the optical characteristics such as the color, appearance and remittance of the definable skin layers to control the depth of ablation at each location.

2013019, Jul 25, 2013

Apr 12, 2011

13/640588

Daniel Patrick Connors - Pleasant Valley NY, US
Jerome Felsenstein - Ossining NY, US
Robert E. Trzcinski - Rhinebeck NY, US
James J. Wynne - Mt. Kisco NY, US

INTERNATIONAL BUSINESS MACHINES CORPORATION - ARMONK NY

A61B 18/20

606 17

Disclosed is an improved system and method for efficiently removing tissue using laser ablation. A first laser emits a first laser beam with a variable first integrated fluence sufficient to ablate tissue. The first laser beam is movably positioned over one or more surfaces of the tissue and the first integrated fluence varies over different levels with position, so different thicknesses of tissue are ablated at different surface positions in order to modify the contour of the surface of the tissue. Modifications include tissue smoothing, removing, feathering, sharpening, and roughening. In one preferred embodiment the tissue is eschar that is removed, unveiling viable tissue. In alternate preferred embodiments, one or more additional lasers beams with different wavelengths, with integrated fluence sufficient to ablate tissue, are moved over the surface of the tissue until a second ablation reaches a second self-termination point, e.g., determined by affects of chemicals below the termination point that absorb the second laser beam without producing the temperature increase necessary for ablation to continue.