Introduction: The aim of this study was to compare the functional outcomes of swallowing act detected by videofluoroscopy of two different techniques in the treatment of laryngeal carcinoma.   Materials and Methods: This study was conducted on 41 patients undergoing two supraglottic laryngectomy techniques. The research population was assigned into two groups of open and laser supraglottic lary...

Lasers with modulated parameters are arguably among the simplest and most accessible laser systems of interest for applications in science and engineering and for theoretical investigations. The intrinsic interest in practical applications and in the nonlinear dynamics of modulated lasers has spurred a wide range of studies after the remarkably influential work of Arecchi et al. [1] reporting t...

Carbon dioxide (CO2) laser surgery as a conservative tool plays a peculiar role in the management of head and neck cancer. Numerous patients who were candidates for transoral laryngeal microsurgery have forced us to eliminate frozen-section evaluation of surgical margins and use a magnified view of the larynx. The present study evaluated surgeon-judged negative margins with permanent microscopi...

Introduction: Mucous retention cysts are a subtype of intracordal vocal cysts that may occur spontaneously or may be associated with poor vocal hygiene, and which require optimal treatment. The objective of this study was to present a new laser-assisted microsurgery technique for treating intracordal mucous retention cysts and to describe the final outcomes.   Materials and Methods: In this pro...

Laser damage mitigation' is a process developed to prevent the growth of nanosecond laser-initiated damage sites under successive irradiation. It consists of re-fusing the damage area with a CO2 laser. In this paper we investigate the stress field created around mitigated sites which could have an influence on the efficiency of the process. A numerical model of CO2 laser interaction with fused ...

We propose to test for the possibility of accelerating an electron beam (utilizing the existing high-power CO2 laser and low emittance electron beam at Brookhaven Accelerator Test Facility) in vacuum to the current CO2 laser power limit. The latest vacuum laser acceleration results can be verified [1] by the schemes discussed here.

Laser-Compton scattering with picosecond CO2 laser pulses is proposed for generation of high-brightness xrays. The interaction chamber has been developed and the experiment is scheduled for the generation of the xrays of 4.7 keV, 10 photons in 10-ps pulse width using 50-MeV, 0.5-nC relativistic electron bunches and 6 GW CO2 laser.

OBJECTIVE This in situ/ex vivo study investigated the effect of CO2 laser irradiation and acidulated phosphate fluoride gel (APF) application, separately and in combination, on enamel resistance to erosion. MATERIAL AND METHODS During 2 experimental 5-day crossover phases, 8 volunteers wore intraoral appliances containing bovine enamel blocks which were submitted to four groups: 1st phase - c...

The aim of this study was to compare the acute tissue effects of a standard CO2 laser (Ultrapulse 5000) with a new design (Ultrapulse 5000L) that utilizes a different carbon isotope (C13) in the rat uterine horn model. Following laparotomy, measured laser injuries were effected with the Ultrapulse 5000 or Ultrapulse 5000L lasers via a laparoscope using CO2 or air for insufflation. Serial sectio...