| Impact of infrared laser light-induced ablation at different wavelengths on bovine intervertebral disc ex vivo: Evaluation with magnetic resonance imaging and histology. | |
| | |
MedLine Citation:
|
PMID: 22532099 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
BACKGROUND AND OBJECTIVE: Percutaneous laser disc decompression is commonly used to lower high pressure in the nucleus pulposus in degenerative disc diseases. The aim of this study was to investigate the impact of diode laser disc decompression at different wavelengths (980-nm vs. 1,470-nm, i.e., different water absorption characteristics). MATERIALS AND METHODS: To model decompression, a flexible laser quartz fiber inserted into the nucleus pulposus of ex vivo bovine spines using computer-assisted surgical navigation was utilized to vaporize tissue. The same energy (500 J) was delivered using both 980-nm and 1,470-nm wavelength lasers. To determine the different impact of the wavelengths before and after the procedure we evaluated the discs with MRI (T(1) , T(2) , diffusion maps) and with histopathology. RESULTS: There were no visible changes on T(1) and T(2) maps after 1,470-nm wavelength laser irradiation; however, the 980-nm wavelength caused significant changes on T(1) (decrease) and T(2) (increase) in the vaporization zone at the site of the quartz fiber. Pathological findings showed carbonization and steam-bubble formation in addition to the T(1) and T(2) changes. No significant changes were detected in the value of apparent diffusion coefficient (ADC) measurements in intervertebral disc with the 980-nm wavelength, but significant ADC and T(1) signal increase was detected with the 1,470-nm wavelength when the whole nucleus pulposus was considered. CONCLUSION: The 1,470-nm laser light had an effect in the whole nucleus pulposus and not only at the site of the quartz fiber, whereas with the 980-nm laser irradiation, significant changes were demonstrated only at the application site. Lasers Surg. Med. © 2012 Wiley Periodicals, Inc. |
| | |
Authors:
|
Zsolt Cselik; Mihály Aradi; Ronald A von Jako; Zsuzsanna Lelovics; Ivett Juhász; Zsolt Egyházi; Péter Bogner; Imre Repa; Attila Schwarcz |
Related Documents
:
|
11413559 - Laser pulse impact on rat mesenteric blood vessels in relation to laser treatment of po... 20830049 - Continuous wave dye-laser technique for simultaneous, spatially resolved measurements o... 12175299 - In vitro and in vivo study of dye diffusion into the human skin and hair follicles. 22825149 - Diffractive coherent combining of a 2.5 kw fiber laser array into a 1.9 kw gaussian beam. 9654489 - Distributions of the quadrupolar and isotropic chemical shift interactions in two-dimen... 22274059 - Transmission over large-core few-mode photonic crystal fiber using distance-independent... 23207379 - Observation of soliton fission in microstructured fiber. 20706509 - Photofabrication of one-dimensional rough surfaces for light-scattering experiments. 16907059 - Fractional translational diffusion of a brownian particle in a double well potential. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-4-24 |
Journal Detail:
|
Title: Lasers in surgery and medicine Volume: - ISSN: 1096-9101 ISO Abbreviation: - Publication Date: 2012 Apr |
Date Detail:
|
Created Date: 2012-4-25 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8007168 Medline TA: Lasers Surg Med Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2012 Wiley Periodicals, Inc. |
Affiliation:
|
Health Center, Kaposvár University, Kaposvár, Hungary. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Ion migration from fluoride-releasing dental restorative materials into dental hard tissues.
Next Document: Synthesis of mesoporous silica nanobamboo with highly dispersed tungsten carbide nanoparticles.