SILVA JÚNIOR, José Alberto Campos da.
Abstract:
Intraoperative neurophysiological monitoring (MNIO) is a methodology that combines
different neurophysiological tests for simultaneous or alternating in the same patient
during the surgical procedure can evaluate the clinical neurophysiology in three
fields: electroencephalography (EEG), electromyography (EMG) and evoked
potential (EP). The visual evoked potential (VEP) evaluates the function and integrity
of cortical and subcortical structures of the visual pathway. This test is performed
daily in neurophysiology laboratories, helping the clarifying of different types of bouts
vision, whether by disease or trauma. This study aimed to develop a prototype for
monitoring the VEP to assess the integrity of the visual pathways during
neurophysiological surgeries. Several steps were performed for the prototype ocular
device: computer simulation; study of the characteristics of the human eye; rapid
prototyping; Biopolymer characterization of polylactic acid (PLA) used in prototyping;
development of an ocular device prototype with integrated lighting system and VEP
achievement tests with the prototype. The PLA used in the prototype for the
development of parts of the device eye was characterized by X-ray diffraction (XRD),
Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry
(DSC), optical microscopy (OM), Scanning Electron Microscopy (SEM) and Energy
Dispersive Spectroscopy (EDS), these results showed that the rapid prototyping did
not change the physical-chemical and morphological PLA. The computer simulation
provides appropriate parameters for the development of ocular device that allowed
greater efficiency in the assembly of electronic circuit. The results of ENP tests were
performed in different patients, with closed eyes and have shown promise for use in
anesthetized patients.