Microcautery based on zinc metallic nanoparticles photodeposited on the core of an optical fiber

•We demonstrate a microcautery implemented by an optical fiber with zinc nanoparticles photodeposited on its core.•We achieved a controllable heat “tip” via radiation intensity of a laser source.•We carried out cauterization and coagulation processes to induce hemostasis in blood vessels using rats.•The system is ideal to carry out micro cauterization processes. The experimental arrangement of a microcautery implemented by an optical fiber with zinc nanoparticles (ZnNPs) photodeposited on its core for the cauterization and coagulation in blood vessels hemostasis processes is presented. The interaction between a laser radiation source and the ZnNPS on the fiber core produces a controllable punctual heat source through the radiation intensity, which is capable of reaching a temperature up to 200°C covering an area of approximately ten micrometers. By using three-to-four-month-old rats of CIIZ-V strain, we made several microcauterization experimental tests to stop blood flow. The findings show that the microcautery obliterates the smooth muscle of the blood vessels concatenating mutually to tissue in an average time of three seconds, at the same time, the blood elements responsible for the coagulation are thermally activated and thus the bleeding is stopped.