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Lasers in Medical Science

Erschienen in:

03.02.2017 | Original Article

Nd:YAG laser-induced morphology change and photothermal conversion of gold nanorods with potential application in the treatment of port-wine stain

verfasst von: Linzhuang Xing, Bin Chen, Dong Li, Jun Ma, Wenjuan Wu, Guoxiang Wang

Erschienen in: Lasers in Medical Science | Ausgabe 3/2017

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Abstract

Based on the principle of selective photothermolysis, 1064 nm Nd:YAG laser has great potential for the treatment of deeper and larger PWS. However, the clinical effectiveness is limited because of the weak absorption of blood to Nd:YAG laser. The aim of this study is to obtain the optimal irradiation conditions to effectively destroy vascular lesions with the assistance of PEG-modified gold NRs to enhance blood absorption of Nd:YAG laser. In our study, PEG-modified gold NRs were prepared by the seeded growth method. Gold NRs after exposure to Nd:YAG laser were characterized using absorption spectra and transmission electron microscope images. The tissue-like phantom containing a glass capillary with blood was prepared and exposed to Nd:YAG laser to investigate the laser energy density and pulse number required for blood coagulation before and after the addition of gold NRs in blood. The results show that the millisecond Nd:YAG laser irradiation does not result in the shape change of gold NRs. After injection of gold NRs into the bloodstream (4.60 mg/kg), the absorbance of blood at 1064 nm increased 3.9 times. The threshold energy density for the treatment of PWS decreased by 33% (from 30 to 20 J/cm²). Our findings provide an experimental guide for choosing laser parameters and gold NRs concentration for the treatment of deeper and larger PWS with the assistance of PEG-modified gold NRs in vivo in the future.

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Titel: Nd:YAG laser-induced morphology change and photothermal conversion of gold nanorods with potential application in the treatment of port-wine stain
verfasst von: Linzhuang Xing
Bin Chen
Dong Li
Jun Ma
Wenjuan Wu
Guoxiang Wang
Publikationsdatum: 03.02.2017
Verlag: Springer London
Erschienen in: Lasers in Medical Science / Ausgabe 3/2017
Print ISSN: 0268-8921
Elektronische ISSN: 1435-604X
DOI: https://doi.org/10.1007/s10103-017-2158-1

Springer Medizin

Abstract

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