BIOTISSUE DISSECTING METHOD WITH LASER RADIATION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC A61B18/20 H01S3/05 

FIELD: physics.

SUBSTANCE: biotissue dissection is performed with laser radiation by using two wavelengths. The radiation of the first wavelength and the radiation of the second wavelength are combined, focused into one spot and brought to the site of the biotissue dissection. The radiation of the first wavelength is provided by the hemostasis of the irradiated biotissue region, and the radiation of the second wavelength is performed by dissecting the biotissue inside the region subjected to hemostasis. The first radiation generated by a diode laser with a wavelength in the range of 0.8÷1.1 mcm is chosen to be quasicontinuous with an average radiation power of 10 to 30 W, a pulse duration of 1.0 to 5.0 ms, and a repetition rate of 100 to 500 Hz. The second radiation generated by CO₂ laser with a wavelength of 10.6 mcm is selected to be a super pulse with a pulse duration of 0.05 to 1.0 ms, a pulsed power of 80÷100 W and pulse frequency of 100 to 500 Hz. The biotissue dissecting device contains a CO₂ laser, a mirror-hinged manipulator for the delivery of CO₂ laser radiation, a diode laser with a radiation wavelength of either 0.81 mcm or 0.98 mcm or 1.06 mcm, a flexible optical fiber for delivering radiation from the diode laser along the mirror-hinged manipulator, an optical nozzle for combining CO₂ laser radiation and diode laser radiation, a focusing lens for focusing the combined radiation into a single spot on the surface of the biotissue at the dissection area. Operating modes of the CO₂ laser and the diode laser are independently regulated by a controller connected to the display and control panel. The optical nozzle is fixed to the mirror-hinged manipulator in front of the focusing lens and contains a rotary mirror sequentially arranged along the diode laser beam, a matching lens and a dichroic mirror.

EFFECT: group of inventions provides precise bloodless biotissue dissection with minimal traumatic effect of laser radiation on adjacent tissues due to the optimal combination of radiation from two spectral ranges and the selection of optimal parameters for laser radiation.

2 cl, 3 dwg