EVALUATION OF THE EFFECTIVENESS OF OPTICS WITH 4 DIFFERENT ANGLES FOR THORACOSCOPY: STUDY ON BOVINE FETUS.
thoracoscopic access; thoracic surgery; anatomical model; endosurgery
The aim of the present work was to evaluate the effectiveness of 0°, 30°, 90° and semi-flexible optics with 180° deflection applied to the thoracic cavity. To achieve the objective, 9 bovine fetuses obtained from females in the final third of pregnancy slaughtered in a slaughterhouse with a Federal Inspection Seal were used. The fetuses were positioned in the sternal recumbency position and access to the thoracic cavity will be through a trocar located in a paraxiphoid process, through which the optics were inserted to evaluate which structures are visualized at each angle. The structures that can be viewed with each lens were evaluated, taking note of the positive and negative points of each one. Furthermore, after performing the thoracoscopy, a conventional thoracotomy was also performed to evaluate these structures for comparison purposes. Through fulfillment of this work, it was possible to observe that using the paraxiphoid approach, there was not a single angle capable of evaluating all the structures targeted. It was observed that the 0° optic had regular viewing for field 1, good for field 2 and regular for field 3. In turn, the 30° optic had good performance for field 1, excellent for field 2 and regular for field 3. The 90° optic proved to be regular for fields 1 and 2, and good for field 3. Regarding the optic with a 180° semi-flexible rod, good performance was obtained for field 1. and 2, and great for field 3.