Of laser phyletic [2003-8-3]

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A variety of laser use the phyletic 　 of laser at PLDD, the laser that basically uses has: ① Er:YAG laser, wavelengh: 2940nm. ② CO₂Laser, 10600nm. ③ Nd:YAG laser, wavelengh: 1064 or 1318nm. ④ Argon laser, wavelengh 488nm or 514nm. ⑤ Ho: YAG laser, wavelengh: 2180nm. ⑥ allows 193nm of molecular laser wavelengh. ⑦ KTP laser, 532nm^{1 〕 of 〔}. The choice of laser relies on the fiber-optic ability that send light: The organization is absorbed / excision; Caloric arises and travel. The character of laser is particularly main, because interverbebral disc does not have blood-vessel, it is close together organize and be close to spinal cord and nerve organization 〔 4 〕 . In current experimental research, because use condition is different, rate of each laser system vaporization are different, among them Choy^{〔 1, 2 〕}Made relatively detailed research to this. He compared a variety of different laser wavelengh to be led to the vaporization of specimen of interverbebral disc of person dead body, measure CO₂, er:YAG, nd:YAG, ho:YThe vaporization rate of AG and Excimer is respectively 0.23, 0.2, 0.16, 0.13 reach 0.08mg/J. Although CO₂With Er:YThe laser of two kinds of different wavelengh is opposite AG effect of interverbebral disc vaporization is best, but do not have corresponding transmission at present fiber-optic, make its application is restricted. Choy advocates use Nd:YAG undertakes PLDD is beautiful. The semiconductor laser that uses recently (wavelengh 805nm) , not only have good vaporization cut, caky function, and its transmission deepness only 1mm, right all round constituent loss is very small, make PLDD more perfect thereby, do not have complication happening almost^{〔 4, 5 〕}. CO of semiconductor laser excel₂, nd:YAG, the laser such as KTP. ...
Bibliographical reference: [1] Choy DS, altman PA, case RB, et Al.Laser Radiation At Various Wavelengths For Decompression Of Intervertebral Disk.Experimental Observations On Human Autopsy Specimens.Clin Orthop.1991 Jun(267):245-250
[2] Choy DS, case RB, fielding W, et Al.Percutaneous Laser Nucleolysis Of Lumbar Disks.N Eng1 J Med.1987 Sep 17;317(12):771-712
[3] Yonezawa T, onomura T, kosaka K, et Al.The System And Procedures Of Percuataneous Intradiscal Laser Nucleotomy.Spine, 1990;15(11):1175-1185
[4] Cangi A, dietemann JL, ide C, et Al.Percutaneous Laser Disk Decompression Under CT And Fluoroscopic Guidance:iNdications, technique, and Clinical Experience.Radiographics, 1996;16(1):89-96
[5] Siebert We, berendse BT, tollgaard J.Percutaneous Laser Disk Decompression.Experience Since 1989.Orthopade 1996;25(1):42-48
[6] Nerubay J, caspi I, levinkopf M, et Al.Percutaneous Laser Nucleolysis Of The Intervertebral Lumbar Disc.An Experimental Study.Clin Orthop, 1997;337(1):42-44
[7] Choy DS, ascher-PW, ranu-HS, et Al.Percutaneous Laser Disc Decompression.A New Therapeutic Modality.Spine.1992 Aug;17(8):949-956
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