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    Dispositivo de aquecimento estéril reutilizável para óticas cirúrgicas e líquidos no transoperatório
    (Universidade Federal de São Paulo (UNIFESP), 2020-11-27) Silva, Cassius Martins E [UNIFESP]; Garcia, Elvio Bueno [UNIFESP]; Universidade Federal de São Paulo
    Introduction: With the confirmation of the use of minimally invasive surgery, using videolaparoscopy and robotic surgery, the use of surgical optics is increasingly widespread and frequent. One of the difficulties experienced by the doctor during the minimally invasive surgical procedure is the reduction of visual capacity, due to the fogging of the front glass of the optics. The condensation of water vapor on the lens when entering the heated environment of the abdominal cavity or any body cavity, occurs due to the temperature difference between the intracavitary water vapor and the optic's distal glass. The fogging of the optics forces the surgeon to remove the optical accessory from the surgical environment, to perform its cleaning, which cools the glass, which causes it to fog up again, when the optics return to the cavity. This increases the surgical time, the number and the variety of postoperative complications. To avoid this process, we promote the heating of the distal end of the optic. However, surgical devices that currently exist do not do so with the required efficiency and speed, therefore the need for a more functional solution. Objective: To develop a functional device for heating the distal end of surgical optics during the procedure. Method: The development of the device idea was carried out using the Design Thinking Method. For the realization of the device, simple materials were used, which have already been studied comprehensively by other authors, and used of their physical-chemical properties for a better development of the artifact in question. The materials are: Polyester, Polyurethane, Sodium Acetate (C2H3NaO2), Stainless Steel (surgical) and aluminum. Results: A cylindrical device with a flat base was designed, with a hole in the center of the upper portion that leads to a 250 mL reservoir, wrapped in another 350 mL reservoir. This reservoir is filled with Sodium Acetate (C2H3NaO2) and contains a surgical steel disc, which when bent, fires a trigger that forms a chain reaction determining the precipitation of Sodium Acetate and its crystallization. This causes an exothermic reaction, which releases heat and heats the liquid contained in the 250 mL reservoir of the device, which in turn will be used for heating and cleaning the optical end, preventing the condensation of water vapor from occurring. Conclusion: A device for heating the distal end of liquids and surgical optics that is sterile and reusable was developed.