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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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| Published in: | Lasers in medical science 2016-04, Vol.31 (3), p.421-428 |
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| container_end_page | 428 |
| container_issue | 3 |
| container_start_page | 421 |
| container_title | Lasers in medical science |
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| creator | Plapler, Hélio Mancini, Marília W. Sella, Valéria R. G. Bomfim, Fernando R. C. |
| description | 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
|
| doi_str_mv | 10.1007/s10103-016-1865-3 |
| format | article |
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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
< 0.05). The residual thermal injury was less evident in 1908 nm laser and sharper in 980 nm laser wavelengths. The laser at a wavelength of 1908 nm was considered the most efficient for the vaporization of the
nucleus pulposus
, followed by the laser wavelengths of 1470, 808, and 980 nm, and proved to be useful for laser nucleotomy procedure.</description><identifier>ISSN: 0268-8921</identifier><identifier>EISSN: 1435-604X</identifier><identifier>DOI: 10.1007/s10103-016-1865-3</identifier><identifier>PMID: 26796705</identifier><identifier>CODEN: LMSCEZ</identifier><language>eng</language><publisher>London: Springer London</publisher><subject>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</subject><ispartof>Lasers in medical science, 2016-04, Vol.31 (3), p.421-428</ispartof><rights>Springer-Verlag London 2016</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c508t-4db5bf13dbecfac0de463f510a76ac37b04a2c19d145ddab251d1f76abb50dbf3</citedby><cites>FETCH-LOGICAL-c508t-4db5bf13dbecfac0de463f510a76ac37b04a2c19d145ddab251d1f76abb50dbf3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26796705$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Plapler, Hélio</creatorcontrib><creatorcontrib>Mancini, Marília W.</creatorcontrib><creatorcontrib>Sella, Valéria R. G.</creatorcontrib><creatorcontrib>Bomfim, Fernando R. C.</creatorcontrib><title>Evaluation of different laser wavelengths on ablation lesion and residual thermal injury in intervertebral discs of the lumbar spine</title><title>Lasers in medical science</title><addtitle>Lasers Med Sci</addtitle><addtitle>Lasers Med Sci</addtitle><description>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
< 0.05). The residual thermal injury was less evident in 1908 nm laser and sharper in 980 nm laser wavelengths. The laser at a wavelength of 1908 nm was considered the most efficient for the vaporization of the
nucleus pulposus
, followed by the laser wavelengths of 1470, 808, and 980 nm, and proved to be useful for laser nucleotomy procedure.</description><subject>Ablation</subject><subject>Animals</subject><subject>Clinical outcomes</subject><subject>Dentistry</subject><subject>Injuries</subject><subject>Intervertebral Disc - pathology</subject><subject>Intervertebral Disc - radiation effects</subject><subject>Intervertebral Disc Displacement - pathology</subject><subject>Intervertebral Disc Displacement - surgery</subject><subject>Intervertebral discs</subject><subject>Laser Therapy</subject><subject>Lasers</subject><subject>Lasers, Semiconductor - therapeutic use</subject><subject>Lesions</subject><subject>Lumbar Vertebrae - pathology</subject><subject>Medicine</subject><subject>Medicine & Public Health</subject><subject>Nuclear power generation</subject><subject>Optical Devices</subject><subject>Optics</subject><subject>Original Article</subject><subject>Photonics</subject><subject>Quantum Optics</subject><subject>Spine</subject><subject>Swine</subject><subject>Vertebrae</subject><subject>Wavelengths</subject><issn>0268-8921</issn><issn>1435-604X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqNkU9r1UAUxQex2NfWD-BGAm7cRO-df0mWUqoVCm4sdBdmMnfaPCbJcyZ5pXs_uPOaKiKIwsAZOL977gyHsVcI7xCgep8QEEQJqEustSrFM7ZBKVSpQd48Zxvgui7rhuMxO0lpC4CVRvGCHXNdNboCtWHfL_YmLGbup7GYfOF67ynSOBfBJIrFvdlToPF2vktFJowNKxooHcSMroj56hYTivmO4pC1H7dLfMiSz0xxT3EmG7Ph-tSlw5ZMFmEZrIlF2vUjnbEjb0Kil096yq4_Xnw9vyyvvnz6fP7hquwU1HMpnVXWo3CWOm86cCS18ArBVNp0orIgDe-wcSiVc8ZyhQ599qxV4KwXp-ztmruL07eF0twO-UkUghlpWlKLNYBstFTNv9GqBsVRqPo_0Eoq3mBTZfTNH-h2WuKY__xIIZf8MRBXqotTSpF8u4v9YOJDi9Aeim_X4ttcfHsovhV55vVT8mIHcr8mfjadAb4CKVvjLcXfVv819QeSaLrm</recordid><startdate>20160401</startdate><enddate>20160401</enddate><creator>Plapler, Hélio</creator><creator>Mancini, Marília W.</creator><creator>Sella, Valéria R. 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G. ; Bomfim, Fernando R. 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G.</au><au>Bomfim, Fernando R. C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evaluation of different laser wavelengths on ablation lesion and residual thermal injury in intervertebral discs of the lumbar spine</atitle><jtitle>Lasers in medical science</jtitle><stitle>Lasers Med Sci</stitle><addtitle>Lasers Med Sci</addtitle><date>2016-04-01</date><risdate>2016</risdate><volume>31</volume><issue>3</issue><spage>421</spage><epage>428</epage><pages>421-428</pages><issn>0268-8921</issn><eissn>1435-604X</eissn><coden>LMSCEZ</coden><abstract>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
< 0.05). The residual thermal injury was less evident in 1908 nm laser and sharper in 980 nm laser wavelengths. The laser at a wavelength of 1908 nm was considered the most efficient for the vaporization of the
nucleus pulposus
, followed by the laser wavelengths of 1470, 808, and 980 nm, and proved to be useful for laser nucleotomy procedure.</abstract><cop>London</cop><pub>Springer London</pub><pmid>26796705</pmid><doi>10.1007/s10103-016-1865-3</doi><tpages>8</tpages></addata></record> |
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| ispartof | Lasers in medical science, 2016-04, Vol.31 (3), p.421-428 |
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| source | Springer Nature |
| 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 |
| title | Evaluation of different laser wavelengths on ablation lesion and residual thermal injury in intervertebral discs of the lumbar spine |
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