1997
DOI: 10.1088/0031-9155/42/2/001
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Nd:YAG laser irradiation in conjunction with cryogen spray cooling induces deep and spatially selective photocoagulation in animal models

Abstract: Successful laser treatment of haemangiomas requires selective photocoagulation of subsurface targeted blood vessels without thermal damage to the overlying epidermis. We present an in vivo experimental procedure, using a chicken comb animal model, and an infrared feedback system to deliver repetitive cryogen spurts (of the order of milliseconds) during continuous Nd:YAG laser irradiation. Gross and histologic observations show deep-tissue photocoagulation is achieved, while superficial structures are protected… Show more

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Cited by 34 publications
(19 citation statements)
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References 27 publications
(28 reference statements)
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“…The cooling mechanism removes heat from the probe-tissue interface and minimizes carbonization or vaporization and allows for creation of larger treated volumes. 1,38 The cooled probe surface further minimizes probe adherence to treated tissues and decreases the incidence of probe failure.…”
Section: Litt Probesmentioning
confidence: 99%
“…The cooling mechanism removes heat from the probe-tissue interface and minimizes carbonization or vaporization and allows for creation of larger treated volumes. 1,38 The cooled probe surface further minimizes probe adherence to treated tissues and decreases the incidence of probe failure.…”
Section: Litt Probesmentioning
confidence: 99%
“…These complications, along with cosmetic disfigurement, are a clear indication for treatment and should immediately lead to a suitable therapy [4-8]. Although laser irradiation has been used to induce photo-thermal destruction of hemangiomas, thermal damage to the epidermis remains a concern [6,9,10]. The objective of this study was to determine the efficacy of combining Nd:YAG photocoagulation with the protective use of ice for definitive treatment of hemangiomas in the pediatric population.…”
Section: Introductionmentioning
confidence: 99%
“…Perhaps the most important design enhancement is the active cooling of the applicator tip (cooling or diffusion sheath), which results in peak temperatures that occur away from the laser probe tip. This enables an increase in the diameter of the kill zone and a larger ablation volume, while at the same time protecting the lesion-normal tissue interface [51,52]. Commercial fiber optic tips are presently cooled via gas or liquids, enabling higher initial power use without damage to the fiber optic tip.…”
Section: Technical Developments Of Laser Fiber Applicators For Cerebrmentioning
confidence: 99%