이승원 교수

OBJECTIVE: Selective use of drains after thyroidectomy has been suggested in the literature. Although the safety of thyroidectomy without drains has been reviewed, there is little specific data available to identify the safety of thyroidectomy combined with central neck dissection (CND) without drains. This study aims to determine the feasibility and safety of thyroidectomy without drains, especially in cases of combined CND. STUDY DESIGN: Prospective, randomized study. MATERIALS AND METHODS: On

The NT technique with the HS is a relatively safe and effective method in total thyroidectomy combined with CND. Moreover, the HS significantly reduced the operating time.

Among 115 patients in the study, 40 cases (34.8%) showed complete remission and 57 cases (49.6%) showed partial remission. As a result, overall improvement rates were 84.4%. Almost all objective and subjective parameters showed statistical improvement at the first and third month after PSI (p < 0.05). Jitter and all subjective parameters maintained statistical improvement until the sixth month. No severe complications, such as fold atrophy, were observed.

OBJECTIVES/HYPOTHESIS: This study evaluated the efficacy of commonly used treatment modalities and determined predictors of treatment outcome for contact granuloma. STUDY DESIGN: Retrospective study. METHODS: Twenty otolaryngologists from 18 university hospitals reviewed the medical records of their own contact granuloma patients for the most recent 4 years. To be enrolled as a valid case, each treatment had to continue for at least 3 months. After excluding intubation granuloma, 590 cases of co

OBJECTIVES: Polyacrylamide hydrogel (PAAG, Aquamid) is widely used as permanent facial tissue filler during facial plastic surgery. In this study, we examined the long-term effects and safety aspects of PAAG as a vocal fold augmentation material for patients with permanent unilateral vocal cord paralysis. STUDY DESIGN: Prospective clinical trials. METHODS: PAAG injection laryngoplasty was performed in 34 consecutive patients with permanent unilateral vocal cord paralysis. Percutaneous injection

Based on these preliminary results, injection laryngoplasty improved the voice, and voice-related quality of life in patients with post-thyroidectomy VCP. It is a simple, safe, and useful method for rehabilitating post-thyroidectomy VCP patients.

4. Laryngoscope, 126:2315-2319, 2016.

Based on the preliminary results of this trial, injection laryngoplasty using a TC approach was an effective alternative to the CT approach, especially in patients who had previously undergone neck surgeries.

These data represent the largest clinical series on arytenoid dislocation with complete vocal function data and follow-up at 6 months after CR. These findings also corroborate existing evidence for early surgical intervention.

OBJECTIVES: This study compared and assessed long-term voice outcomes when thyroidectomy-related unilateral vocal fold paralysis (VFP) was managed using injection laryngoplasty (IL) and recurrent laryngeal nerve reinnervation (RLNR). STUDY DESIGN: Prospective clinical study. METHODS: A prospective clinical trial was performed from March 2005 to January 2016 at Soonchunhyang University Bucheon Hospital (Bucheon, South Korea). Nineteen patients who underwent ansa cervicalis to RLNR or direct reinn

The causes of VFP were cancer involving the RLN (68.4%, 13/19) and iatrogenic nerve transection (31.5%, 6/19). Reinnervation techniques were direct neurorrhaphy (63.2%, 12/19) and ansa-RLN anastomosis (36.8%, 7/19). Subjective parameters such as the Voice Handicap Index (VHI), posterior glottic closure, and mucosal wave demonstrated significant improvement 6 months postoperatively, and the majority of parameters remained stable up to 24 months (p < 0.05). Objective parameters, such as maximum ph

BACKGROUND: We selected glutathione peroxidase 3 (GPx3) as a specific candidate that is down regulated in patients with lung cancer. In this study, we examined the diagnostic value of serum GPx3, which is an extracellular protein and readily detectable in blood. METHODS: We collected serum samples from 342 patients with lung cancer and 126 controls (normal healthy people and patients with benign diseases or other malignancies). We measured serum GPx3 levels using the enzyme-linked immunosorbent

INTRODUCTION: This study prospectively evaluates and compares the treatment efficacy of botulinum toxin injection under electromyography guidance (EMG group) and percutaneous botulinum toxin injection under flexible fiberscopic guidance (fiberscopy group). METHODS: Thirty patients with adductor spasmodic dysphonia (ADSD), who had never received treatment, were randomly allocated into EMG- or fiberscopy-guided botulinum toxin injections between March 2008 and February 2010. We assessed acoustic a

NASA's space missions Dawn and JIMO will use low-thrust propulsion for multi-revolution orbit transfers around a central body. Here we address the problem of designing low-thrust orbit transfers between arbitrary orbits in an inverse-square gravity field by using evolutionary algorithms to drive parameter selection in a Lyapunov feedback control law (the Q-law). We develop an efficient and efficacious method to assess, with reasonable accuracy, the trade off between propellant mass and flight ti

Multi-objective genetic algorithms (MOGA) are used to optimize a low-thrust spacecraft control law for orbit transfers around a central body. A Lyapunov feedback control law called the Q-law is used to create a feasible orbit transfer. Then, the parameters in the Q-law are optimized with MOGAs. The optimization goal is to minimize both the flight time and the consumed propellant mass of the trajectory created by the Q-law, and consequently to find Pareto-optimal trajectories. To improve the qual