Navegando por Palavras-chave "Discectomia a laser"

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    Comparação das lesões provocadas em discos intervertebrais por diferentes comprimentos de onda de laser de diodo
    (Universidade Federal de São Paulo (UNIFESP), 2017-08-31) Ferreira, Carla Cristina Serra [UNIFESP]; Plapler, Helio [UNIFESP]; Florêncio-Silva, Rinaldo [UNIFESP]; http://lattes.cnpq.br/3283859903356767; http://lattes.cnpq.br/2871630525937037; http://lattes.cnpq.br/6070690583219060; Universidade Federal de São Paulo (UNIFESP)
    Laser discectomy or laser nucleotomy occupies an increasingly important place in less invasive spinal procedures, but the ideal laser is still the subject of study. The aim of this research was to compare the diode laser action at the wavelengths of 808nm, 980nm, 1470nm and 1908nm and the volume of the vaporization lesion caused by the different wavelengths in the percutaneous decompression procedures of the intervertebral disc (nucleotomy). Methods: Six pigs were previously anesthetized and euthanized and their vertebral columns removed. The lumbar columns were then maintained on ice and their intervertebral discs (region L1 to L5) underwent puncture-induced injury. The columns were then sent to the nuclear magnetic resonance (MR) for pre-irradiation analysis. Later, the discs were irradiated with laser at the wavelengths of 808nm (G808), 980nm (G980), 1470nm (G1470) and 1908nm (G1908). Six intervertebral discs (L1) were not irradiated, constituting the control group. The columns were then again destined for MR and then immersed in 10% buffered formalin for histological analysis. The columns were then decalcified and their intervertebral discs dissected and processed for paraffin inclusion. Transverse sections of the disks were stained by hematoxylin and eosin for histomorphometric analysis, where the thickness of the carbonized and bubble area was measured. Results: The data analyzed showed that the lesions were equivalent within each group and that there was no difference between the groups in the pre-irradiation. In the post-irradiation evaluation, the MR showed that the volume of the intervertebral disc lesion was smaller in the G1470 and G1908 groups, in comparison to the other groups. The groups G808 and G980 presented greater thickness of carbonized area compared to groups G1470 and G1908. In addition, G980 also showed greater bubble area thickness compared to the other groups. These lesions were more pronounced, and more localized in the G808 and G980 groups, compared to lesions promoted by lasers with wavelengths of 1470nm and 1908nm, which were broader but less intense. Conclusion: Our data indicate that the intervertebral disc lesions caused by the laser application of 808nm and 980nm are more intense, but more focal, compared to the laser application of 1470nm and 1908nm.