نتایج جستجو برای: carbon dioxide laser pulse

تعداد نتایج: 565177  

2009

Non-invasive monitoring of arterial oxygen using percutaneous pulse oximetry is well established. Although some studies show a good correlation of transcutaneous end-tidal carbon dioxide partial pressure (PetCO2) with arterial carbon dioxide partial pressure (PaCO2), they were performed in research settings and involved restricted populations such as paediatric, accident and emergency, or inten...

2015
Francisco C. B. Maia Ricardo E. Samad Jefferson Bettini Raul O. Freitas Nilson D. Vieira Junior Narcizo M. Souza-Neto

Rapid variations of the environmental energy caused by ultrashort laser pulses have induced phase transitions in carbon allotropes, therefore bringing the promise of revealing new carbon phases. Here, by exposing polycrystalline graphite to 25 fs laser pulses at 4 J/cm(2) fluence under standard air atmosphere, we demonstrated the synthesis of translucent micrometer-sized structures carrying dia...

Journal: :Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.] 2002
Sarah Boyce Tina S Alster

BACKGROUND Epidermal nevi have been notoriously difficult to treat due to their large size and often conspicuous location. Variable results have been obtained with different laser treatments, and scarring and/or incomplete removal is typical after excisional or other destructive modalities. OBJECTIVE To outline the successful use of a short-pulsed CO2 laser in the long-term eradication of epi...

Journal: :journal of lasers in medical sciences 0
reza fekrazad laser research center in medical sciences (lrcms) - periodontal department, faculty of dentistry, aja university of medical sciences, tehran, iran hanieh nokhbatolfoghahaei laser research center of dentistry, dental research institute, tehran university of medical sciences, tehran, iran farzaneh khoei laser research center of dentistry, dental research institute, tehran university of medical sciences, tehran, iran katayoon am kalhori iranian medical laser associations, tehran, iran

introduction: pyogenic granuloma (pg) is a common tumor-like growth of the oral cavity, considered to be of non-neoplastic nature, often caused by constant low-grade trauma as well as poor oral hygiene and maybe due to hormonal disturbances. surgical excision, and removal of underlying cause in some cases, is the preferred method of treatment as it is only a benign lesion. in order to remove th...

Journal: :Archives of otolaryngology--head & neck surgery 2006
Jiannis K Hajiioannou Antonios Nikolidakis Irene Naumidi Emmanuel Helidonis Giannis Tzanakakis George A Velegrakis

OBJECTIVES To determine the role of the main cartilage components in the internal system of interlocked stresses and to clarify the effect of laser beam irradiation on cartilage. DESIGN Control and experimental series. SUBJECTS Rabbit ear cartilage. INTERVENTION Rabbit ear cartilage strips incubated in collagenase and hyaluronidase enzyme solutions for specific periods were examined, and ...

سعید امین نعیمی, , محسن منتظرالقائم, , منصور زند, ,

In this study, the design and construction of a pulse high repetition rate (HRR), transverse atmospheric pressure (TEA) CO2 laser with ultra violet preionization is presented. In this laser, normal pure, industrial gases and also a combination of spark and corona preionization are used. In semi-sealed off condition, we obtained 220 watts at 300 Hz, %7.7 efficiency, 735 mJ/pulse. The best record...

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