Selective laser induced optical breakdown in biological medium

Abstract

Apparatuses and methods for selectively providing laser induced optical breakdown (LIOB) of absorptive targets in biological media. For example, LIOB may be used as part of tissue therapy, such as cosmetic therapy associated with tattoo removal. In some implementation, a system for selectively providing LIOB includes a field generator configured to generate a field and to apply the field through aportion of a biological medium. The system also includes a light source configured to deliver laser light to the portion of the biological medium during application of the field. Application of the field to the biological medium induces movement of free electrons within the portion of the biological medium which may reduce or slow the formation of vacuoles in the biological medium responsive to the laser light.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application No. 62 / 460867, filed February 19, 2017, which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure generally relates to therapeutic uses of laser light. More specifically, but not by way of limitation, the present disclosure relates to systems, devices, and methods for using fields (eg, electric fields, magnetic fields, or both) to selectively produce laser-induced optical breakdown (LIOB) in biological media. Background technique [0004] High-power pulsed lasers have been used for some treatments for many years. In a medical context, "laser" is often used to refer to a coherent light source used to treat or remove tissue. Examples of pulsed laser treatments include laser vein removal, laser hair removal, and laser tattoo removal. Each of these treatments generally involves aiming a laser at the bio...

AI Technical Summary

Problems solved by technology

For example, release of heat and shock wave damage to cells in and around the site of treatment of biological media can lead to necrotizing vasculitis, which in turn leads to significant collagen damage and epidermal scarring 24-48 hours after laser treatment

In an attempt to counteract this damage, the laser fluence during the treatment phase can be reduced or limited, which reduces the overall effectiveness of the treatment

Repeatedly pulsed laser treatment of tattooed skin is ineffective without significant rest periods between l

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