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Carbon Dioxide Laser (carbon + dioxide_laser)
Selected AbstractsClear Cell Acanthoma Successfully Treated with a Carbon Dioxide LaserDERMATOLOGIC SURGERY, Issue 10 2005Ching-Chi Chi MD Background. The treatment of choice for clear cell acanthoma (CCA) is excision. Resolution after cryotherapy has also been reported but requires three to four courses of treatment. Objective. To demonstrate three CCA lesions in two patients successfully treated with a carbon dioxide (CO2) laser. Methods. Under local anesthesia, these lesions were vaporized by using a CO2 laser in the Silktouch mode with a spot size of 5 mm and a fluence of 20 J/cm2. Two to six passes, as needed, were delivered until the tumor was completely removed. Results. Pain was minimal or nonexistent during and after the operation. No postoperative edema was noted. The wounds healed satisfactorily without scarring. No sign of recurrence was found following operation. Conclusion. The CO2 laser has the advantages of requiring only one course, precise tumor removal, a relatively bloodless surgical field, a short operation time, and less or no postoperative pain and edema. Postoperative wound care is convenient and easy with hydrocolloid and alginate dressings. The patient's quality of life is less adversely affected. The CO2 laser may be appropriate for multiple CCAs, giant CCA, CCA overlying or near joints, CCA refractory to cryotherapy, patients on anticoagulants, and those who cannot tolerate pain from cryotherapy, especially children and the elderly. [source] Treatment of Recurrent Ingrown Great Toenail Associated with Granulation Tissue by Partial Nail Avulsion Followed by Matricectomy with Sharpulse Carbon Dioxide LaserDERMATOLOGIC SURGERY, Issue 5 2002Kuo-chia Yang MD background. The effectiveness of partial nail avulsion followed by matricectomy with carbon dioxide (CO2) laser for the treatment of ingrown great toenails remains unclear. objective. This study sought to determine the effectiveness of partial nail avulsion followed by matricectomy with sharpulse CO2 laser in the treatment of recurrent ingrown great toenails associated with granulation tissue. materials and methods. Fourteen patients with a total of 18 recurrent ingrown great toenails were randomly selected for participation in this study. Partial nail avulsions followed by matricectomy with sharpulse CO2 laser were performed on the involved nails. After at least 6 months, we evaluated the recurrence of ingrown toenails, regrowth of the nail spike, duration of post-treatment pain and post-treatment infection. results. Partial nail avulsion followed by matricectomy with sharpulse CO2 laser in the treatment of ingrown toenails resulted in a high cure rate, short postoperative pain duration and low risk of postoperative infection. conclusion. This method we advocate is convenient and effective for the treatment of recurrent ingrown great toenail associated with granulation tissue. [source] Rhinophyma: Carbon dioxide laser with computerized scanner is still an outstanding treatmentAUSTRALASIAN JOURNAL OF DERMATOLOGY, Issue 4 2009Shueh-Wei Lim ABSTRACT The cosmetic deformity produced by rhinophyma is characterized by nodular hypertrophy of the nasal skin. A retrospective review and analysis of nine consecutive patients with moderate and major rhinophyma treated with scanned carbon dioxide laser was performed. A particular method of continuous scanner use is described. This report demonstrates excellent cosmetic results and no major postoperative complications or recurrence of the condition after 1 year of follow up for seven patients. Two more patients had been followed up for 1 month at the time this paper was written. Scanned carbon dioxide laser is safe and highly effective treatment for rhinophyma. [source] Radiosurgery versus carbon dioxide laser for dermatochalasis correction in Asians,LASERS IN SURGERY AND MEDICINE, Issue 2 2007Carol S. Yu MBBS (Hons), MRCS (Edin) Abstract Background and Objectives Carbon dioxide (CO2) laser and radiosurgery are techniques commonly employed in oculoplastic surgery. However, there is no literature comparing their results in blepharoplasty. Study Design/Materials and Methods Twenty Chinese patients with dermatochalasis underwent radiosurgery in one upper eyelid and CO2 laser in the contralateral eyelid. Intraoperative time, hemorrhage, and pain control were assessed. Subjects were evaluated at postoperative 1 hour, 1 week, 1 month, and 3 months for hemorrhage and wound healing by a masked assessor. Results All patients reported minimal pain with either technique. A significantly shorter operative time was achieved with CO2 laser, with better intraoperative hemostasis. There was no significant difference in postoperative hemorrhage and wound swelling between radiosurgery and CO2 laser. No significant intraoperative complications were noted. Conclusions Both radiosurgery and CO2 laser are equally safe and effective for upper lid blepharoplasty. CO2 laser achieves shorter operative time with superior intraoperative hemostasis. Lasers Surg. Med. 39:176,179, 2007. © 2007 Wiley-Liss, Inc. [source] Rhinophyma: Carbon dioxide laser with computerized scanner is still an outstanding treatmentAUSTRALASIAN JOURNAL OF DERMATOLOGY, Issue 4 2009Shueh-Wei Lim ABSTRACT The cosmetic deformity produced by rhinophyma is characterized by nodular hypertrophy of the nasal skin. A retrospective review and analysis of nine consecutive patients with moderate and major rhinophyma treated with scanned carbon dioxide laser was performed. A particular method of continuous scanner use is described. This report demonstrates excellent cosmetic results and no major postoperative complications or recurrence of the condition after 1 year of follow up for seven patients. Two more patients had been followed up for 1 month at the time this paper was written. Scanned carbon dioxide laser is safe and highly effective treatment for rhinophyma. [source] Infrared multiple photon dissociation spectroscopy of ions in Penning trapsMASS SPECTROMETRY REVIEWS, Issue 3 2009John R. Eyler Abstract The ability of Paul and Penning traps to contain ions for time periods ranging from milliseconds to minutes allows the trapped ions to be subjected to laser irradiation for extended lengths of time. In this way, relatively low-powered tunable infrared lasers can be used to induce ion fragmentation when a sufficient number of infrared photons are absorbed, a process known as infrared multiple photon dissociation (IRMPD). If ion fragmentation is monitored as a function of laser wavelength, a photodissociation action spectrum can be obtained. The development of widely tunable infrared laser sources, in particular free electron lasers (FELs) and optical parametric oscillators/amplifiers (OPO/As), now allows spectra of trapped ions to be obtained for the entire "chemically relevant" infrared spectral region. This review describes experiments in which tunable infrared lasers have been used to irradiate ions in Penning traps. Early studies which utilized tunable carbon dioxide lasers with a limited output range are first reviewed. More recent studies with either FEL or OPO/A irradiation sources are then covered. The ionic systems examined have ranged from small hydrocarbons to multiply charged proteins, and they are discussed in approximate order of increasing complexity. © 2009 Wiley Periodicals, Inc., Mass Spec Rev 28:448,467, 2009 [source] | ||||||||||