Evaluation of different laser wavelengths on ablation lesion and residual thermal injury in intervertebral discs of the lumbar spine

Laser discectomy or nucleotomy is an increasingly important method for less invasive procedures of column, but the ideal kind of laser is still not established. As the wavelength is an important parameter for water absorption, this study was performed to investigate the action of the laser emission...

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Bibliographic Details
Published in:Lasers in medical science 2016-04, Vol.31 (3), p.421-428
Main Authors: Plapler, Hélio, Mancini, Marília W., Sella, Valéria R. G., Bomfim, Fernando R. C.
Format: Article
Language:English
Subjects:
Ablation
Animals
Clinical outcomes
Dentistry
Injuries
Intervertebral Disc - pathology
Intervertebral Disc - radiation effects
Intervertebral Disc Displacement - pathology
Intervertebral Disc Displacement - surgery
Intervertebral discs
Laser Therapy
Lasers
Lasers, Semiconductor - therapeutic use
Lesions
Lumbar Vertebrae - pathology
Medicine
Medicine & Public Health
Nuclear power generation
Optical Devices
Optics
Original Article
Photonics
Quantum Optics
Spine
Swine
Vertebrae
Wavelengths
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Summary:Laser discectomy or nucleotomy is an increasingly important method for less invasive procedures of column, but the ideal kind of laser is still not established. As the wavelength is an important parameter for water absorption, this study was performed to investigate the action of the laser emission in the near infrared (808 to 1908 nm) region in the context of surgical procedures for percutaneous intervertebral disc decompression (nucleotomy). Forty intervertebral discs from pigs lumbar spines were irradiated with laser ( λ  = 808, 980, 1470 and 1908 nm), 1-s on/off time cycles, for 120 cycles and 10 W of power (808, 980, and 1470 nm) or 240 cycles and 5 W of power (1908 nm), with total power of 1200 J, and subjected to microscopic evaluation through hematoxylin-eosin (HE) staining in order to measure the ablation lesions and the residual thermal injury. Ten other discs were not irradiated and worked as controls. The ablation lesions were measured (in mm) at 1.08 ± 1.25, 1.70 ± 0.63, 2.23 ± 1.02, 1.37 ± 0.39, and 0.94 ± 0.41 (median ± SD) for the control, 808, 980, 1470, and 1908 nm groups, respectively. The difference between 1908 nm and all the other groups was statistically significant ( p  
ISSN:0268-8921
1435-604X
DOI:10.1007/s10103-016-1865-3