Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Thermal applicators
Patent
1995-06-07
1998-06-23
Cohen, Lee S.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Thermal applicators
607154, 607156, A61N 502
Patent
active
057698791
ABSTRACT:
An apparatus and method for non-invasive removal of target tissues is disclosed. The apparatus includes a microwave applicator antenna element array for introducing a plurality of cylindrical, quasi-transverse electromagnetic surface waves adjacent the target tissue. Through successive phase shifts, the electromagnetic surface waves are brought to converge on a focal point within the target tissue, thereby elevating the temperature of the tissue. In one application, the microwave applicator is used for reducing fatty tissue within a subcutaneous fatty layer by taking into account the differing dielectric constants of the adjacent skin and muscle layers. By launching a wave trapped between the skin layer and the muscle layers, a converging cylindrical wave is produced which includes a column of high density along a line extending from the skin-fat interface to the muscle-fat interface. The effect of the column of high density is to raise the temperature of adipose cells to a level at which fat cell necrosis occurs. In operation, a cooling bolus coupled to the applicator actively maintains skin surface temperature below a level at which cell damage or discomfort would occur.
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LeVay Peter
Richards William F.
Cohen Lee S.
Medical Contouring Corporation
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