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CO2 laser

Tomasz Żądkowski, Paweł Nachulewicz, Maciej Mazgaj, Magdalena Woźniak, Czesław Cielecki, Andrzej Paweł Wieczorek, Iwona Beń-Skowronek
Treatment of hypertrophic scars arising as a result of thermal burns in children is still a big problem. The results of the treatment are not satisfactory for patients and parents, and new methods of treatment are still investigated.We present the use of one of the most modern carbon dioxide (CO2) lasers (Lumenis Encore laser equipped with a Synergistic Coagulation and Ablation for Advanced Resurfacing module) in the treatment of hypertrophic scars in children after burns.From March to April of 2013, a group of 47 patients aged 6 to 16 years underwent 57 laser surgery treatments...
October 2016: Medicine (Baltimore)
Rahim Rahimi, Su Su Htwe, Manuel Ochoa, Amy Donaldson, Michael Zieger, Rajiv Sood, Ali Tamayol, Ali Khademhosseini, Amir M Ghaemmaghami, Babak Ziaie
Culturing cells at the air-liquid interface (ALI) is essential for creating functional in vitro models of lung tissues. We present the use of direct-patterned laser-treated hydrophobic paper as an effective semi-permeable membrane, ideal for ALI cell culture. The surface properties of the paper are modified through a selective CO2 laser-assisted treatment to create a unique porous substrate with hydrophilic regions that regulate fluid diffusion and cell attachment. To select the appropriate model, four promising hydrophobic films were compared with each other in terms of gas permeability and long-term strength in an aqueous environment (wet-strength)...
October 12, 2016: Lab on a Chip
Andrew M Read-Fuller, David M Yates, David D Vu, John E Hoopman, Richard A Finn
OBJECTIVE: Facial resurfacing with a CO2 laser has been used for treatment of pathologic lesions and for cosmetic purposes. Postoperative complications and problems after laser resurfacing include infections, acneiform lesions, and pigment changes. This retrospective study describes the most common problems and complications in 105 patients and assesses postoperative pain in 38 patients. STUDY DESIGN: All patients received CO2 laser resurfacing for treatment of malignant/premalignant lesions and had postoperative follow-up to assess problems and complications...
August 23, 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Sertac Yetiser
Objective. The aim of this study is to analyze the hearing and vestibular outcome of patients with otosclerosis who have been operated on by fiber optic flexible CO2 laser. Study Design. A preliminary and retrospective study was conducted in 30 patients with otosclerosis. Results. Comparative analysis of average air conduction thresholds (53.41 ± 11.81 dB versus 26.37 ± 11.04 dB) and air-bone gaps (34 ± 9.92 dB versus 12.03 ± 6.02 dB) before and after the surgery were statistically significant (<0...
2016: International Journal of Otolaryngology
Barry D Bruner, Zdeněk Mašín, Matteo Negro, Felipe Morales, Danilo Brambila, Michele Devetta, Davide Faccialà, Alex G Harvey, Misha Ivanov, Yann Mairesse, Serguei Patchkovskii, Valeria Serbinenko, Hadas Soifer, Salvatore Stagira, Caterina Vozzi, Nirit Dudovich, Olga Smirnova
High harmonic generation (HHG) spectroscopy has opened up a new frontier in ultrafast science, where electronic dynamics can be measured on an attosecond time scale. The strong laser field that triggers the high harmonic response also opens multiple quantum pathways for multielectron dynamics in molecules, resulting in a complex process of multielectron rearrangement during ionization. Using combined experimental and theoretical approaches, we show how multi-dimensional HHG spectroscopy can be used to detect and follow electronic dynamics of core rearrangement on sub-laser cycle time scales...
September 26, 2016: Faraday Discussions
Shariq Najeeb, Zohaib Khurshid, Sana Zohaib, Bilal Najeeb, Saad Bin Qasim, Muhammad Sohail Zafar
BACKGROUND AND OBJECTIVE: The exact etiology of recurrent aphthous ulcers (RAS) is unknown. The management of RAS is not always straightforward. The aim of this review is to critically analyze and summarize the clinical literature focusing on the management of aphthous ulcers using low-level lasers. MATERIALS AND METHODS: The Medline (PubMed), Web of Knowledge (ISI), Cochrane Central Register of Controlled Trials (CENTRAL) and Embase databases were searched electronically for studies published in last 20 years (1995-2015) using the keywords "recurrent aphthous stomatitis," "aphthous ulcers," and "laser...
September 15, 2016: Medicina
Sait Karaca, Oğuz Basut, Uygar Levent Demir, Ömer Afşın Özmen, Fikret Kasapoğlu, Hakan Coşkun
OBJECTIVE: Various types of laser, microdrill, and perforator are effectively used in the surgical treatment of otosclerosis. However, they have certain disadvantages along with advantages. The aim of this study was to evaluate the effects of carbon dioxide (CO2) laser and perforator stapedotomy techniques on audiological outcomes and postoperative vestibular functions via videonystagmography (VNG). MATERIALS AND METHODS: This prospective and randomized clinical study was conducted in an academic tertiary medical center...
August 2016: Journal of International Advanced Otology
David Santamaría-Pérez, Chris McGuire, Adam Makhluf, Abby Kavner, Raquel Chuliá-Jordán, Julio Pellicer-Porres, Domingo Martinez-García, Andrew Doran, Martin Kunz, Plácida Rodríguez-Hernández, Alfonso Muñoz
The role of carbon dioxide, CO2, as oxidizing agent at high pressures and temperatures is evaluated by studying its chemical reactivity with three transition metals: Au, Pt, and Re. We report systematic X-ray diffraction measurements up to 48 GPa and 2400 K using synchrotron radiation and laser-heating diamond-anvil cells. No evidence of reaction was found in Au and Pt samples in this pressure-temperature range. In the Re + CO2 system, however, a strongly-driven redox reaction occurs at P > 8 GPa and T > 1500 K, and orthorhombic β-ReO2 is formed...
October 6, 2016: Inorganic Chemistry
Julia Kälsch, Leona L Pott, Atsushi Takeda, Hideo Kumamoto, Dorothe Möllmann, Ali Canbay, Barbara Sitek, Hideo A Baba
Beneficial effects of balneotherapy using naturally occurring carbonated water (CO2 enriched) have been known since the Middle Ages. Although this therapy is clinically applied for peripheral artery disease and skin disorder, the underlying mechanisms are not fully elucidated.Under controlled conditions, rats were bathed in either CO2-enriched water (CO2 content 1200 mg/L) or tap water, both at 37 °C, for 10 min daily over 4 weeks. Proliferation activity was assessed by Ki67 immunohistochemistry of the epidermis of the abdomen...
October 5, 2016: International Journal of Biometeorology
Andrea C Issler-Fisher, Oliver M Fisher, Ania O Smialkowski, Frank Li, Constant P van Schalkwyk, Peter Haertsch, Peter K M Maitz
BACKGROUND: The introduction of ablative fractional CO2 lasers (CO2-AFL) for burn scar management shows promising results. Whilst recent studies have focused on objective scar outcomes following CO2-AFL treatment, to date no data on patient subjective factors such as quality of life are available. METHODS: A prospective study was initiated to analyze the safety and efficacy of the CO2-AFL. Various objective and subjective outcome parameters were prospectively collected from the date of first consultation and follow-up following treatment...
October 1, 2016: Burns: Journal of the International Society for Burn Injuries
Alexander J Schmithausen, Manfred Trimborn, Wolfgang Büscher
Trace gases such as nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2) are climate-related gases, and their emissions from agricultural livestock barns are not negligible. Conventional measurement systems in the field (Fourier transform infrared spectroscopy (FTIR); photoacoustic system (PAS)) are not sufficiently sensitive to N2O. Laser-based measurement systems are highly accurate, but they are very expensive to purchase and maintain. One cost-effective alternative is gas chromatography (GC) with electron capture detection (ECD), but this is not suitable for field applications due to radiation...
October 3, 2016: Sensors
Ana-Salvaterra Azevedo, Luís-Silva Monteiro, Fernando Ferreira, Maria-Leonor Delgado, Fernanda Garcês, Sofia Carreira, Marco Martins, Juan Suarez-Quintanilla
BACKGROUND: Lasers have become standard tools for the surgical treatment of oral lesions. The purpose of this study is to determine the surgical margins and histologically evaluate the tissue thermal effects induced by different types of surgical instruments. MATERIAL AND METHODS: Cuts were made in pork tongues' mucosa with different lasers (Er:YAG at 2W with and without air / water spray and at 4W with and without air / water spray; CO2 at 3.5W and 7W in pulsed mode and at 7W in continuous mode; the diode laser at 3...
October 2016: Journal of Clinical and Experimental Dentistry
David A Bemis, Brian H Johnson, Mary Jean Bryant, Rebekah D Jones, Brynn V McCleery, Cheryl B Greenacre, Vincent Perreten, Stephen A Kania
An organism reported in the early literature to be a rare cause of cervical lymphadenitis in guinea pigs, Streptobacillus moniliformis, has been reclassified as Caviibacter abscessus We describe a series of sequential cases of abscesses in guinea pigs that were presented to our clinic from which the only agent isolated was a unique, serum-requiring bacterium. Discrete colonies were not detected in 6.5% CO2 or anaerobically on routine primary isolation media containing up to 5% whole sheep blood, with and without cysteine, vitamin K, and hemin supplementation after 7 days of incubation at 37°C...
November 2016: Journal of Veterinary Diagnostic Investigation
Manisha Balai, Lalit Kumar Gupta, Ashok Kumar Khare, Ankita Srivastava, Asit Mittal, Ajit Singh
BACKGROUND: Cutaneous leishmaniasis (CL) usually occurs in areas with hot and dry climate. In India, the desert areas of Rajasthan, Gujarat, and the plains of Northwestern frontier are endemic for this disorder. AIMS AND OBJECTIVES: The present study was aimed to describe clinicoepidemiological profile of the cases of CL from South Rajasthan, which is a nonendemic area of Rajasthan. MATERIALS AND METHODS: During a period of 4 years (2010-2014), a total of 23 patients with CL were diagnosed...
September 2016: Indian Journal of Dermatology
Zhen-Dong Sun, Shan-Dong Qi, Ronald M Lees, Li-Hong Xu
Lamb-dip spectroscopy of the C-N stretching band of methylamine has been systematically extended to P-, Q-, and R-branch by using microwave sidebands of a large number of CO2 laser lines as frequency-tunable infrared sources in a sub-Doppler spectrometer. Lamb-dip signals of more than 150 spectral lines have been observed with a resolution of 0.4 MHz and their frequencies have been precisely measured with an accuracy of ±0.1 MHz. More than 30 closed combination loops have been formed, which unambiguously confirm the assignments...
September 29, 2016: Scientific Reports
A Oraif, G Vilos, A Vilos, H Abduljabar
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
S Fatehchehr, P Macik, K Sinervo
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
F A Alvi, M Zubair, B Diakos
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
U Leone Roberti Maggiore, M Parma, M Candiani, S Salvatore
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
Tae In Kim, Ki Heon Jeong, Min Kyung Shin
No abstract text is available yet for this article.
September 26, 2016: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
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