Flexible laser applicator for thermal medical treatment of biological tissue using silicon dioxide nanoparticles useful for tissue coagulation in surgery

摘要

It has been found that by mixing of particles of diameter within the nano range, preferably Si dioxide, it is possible to increase the refractive index of a silicone matrix without additional light scattering. A flexible laser applicator for thermal treatment of biological tissue by means of laser radiation via a light conductor (1) whose distal end is enveloped by a jacket (2) transparent to laser radiation and which projects beyond the fiber end (sic), while a light with a silicone matrix (3) is located in front of the fiber end with embedded scattered particles (4), and a synthetic plastic matrix, preferably in silicone, in which are mixed-in non-scattering particles (5) of diameter a few nanometers, preferably of silicon dioxide, preferably of concentration 1-10%, while the distal end of the jacket (2) is closed with an opaque end piece (6) transparent to laser radiation.