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Characteristics of shock waves induced by pulsed lasers and their effects on arterial tissue: comparison of excimer, pulse dye, and holmium YAG lasers.

Authors
Tomaru, T; Geschwind, HJ; Boussignac, G; Lange, F; Tahk, SJ
Citation
American heart journal, 123(4Pt1):896-904, 1992
Journal Title
American heart journal
ISSN
0002-87031097-6744
Abstract
Shock waves were investigated using an excimer laser at 308 nm with 18.9 mjoules/pulse, a pulsed dye laser at 480 nm with 100 mjoules/pulse, and a holmium YAG (yttrium-aluminum-garnet) laser at 2.1 microns with 420 mjoules/pulse. At a distance from the target tissue, excimer lasing resulted in no shock waves in saline, while the other lasers produced smaller shock waves than those recorded when the laser was in contact with tissue (0.22 versus 2.0 mm Hg with the pulsed dye laser, 0 versus 0.23 mm Hg with the excimer laser, and 0.44 versus 6.9 mm Hg with the holmium YAG laser; p less than 0.001, respectively). In blood, excimer laser irradiation at a distance from the tissue produced shock waves as great as those produced when the laser was in contact with the tissue (0.19 versus 0.24 mm Hg with the excimer laser, 1.8 versus 3.0 mm Hg with the pulsed dye laser, and 3.1 versus 5.9 mm Hg with the holmium YAG laser; p less than 0.001 with the pulsed dye and holmium YAG lasers, respectively). When lasing was done at 60 mjoules/mm2, the pulsed dye and excimer lasers produced similar shock waves when the lasers were in contact with tissue; however, the holmium YAG laser did not produce shock waves. Thus pulsed lasers can produce shock waves of different characteristics according to the laser source.
MeSH terms
Analysis of VarianceAngioplasty, Laser/adverse effects/*instrumentation/statistics & numerical dataAorta/pathology/surgeryArteriosclerosis/pathology/surgeryBloodCatheterization, Peripheral/instrumentationCoronary Vessels/pathology/*surgeryEvaluation Studies as TopicHumansSodium ChlorideTransducers, PressureUltrasonics/*adverse effects
PMID
1549997
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Cardiology
AJOU Authors
탁, 승제
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