Nanocrystal Engineering of Thin-Film Yttria-Stabilized Zirconia Electrolytes for Low-Temperature Solid-Oxide Fuel Cells.

To overcome significantly sluggish oxygen-ion conduction in the electrolytes of low-temperature solid-oxide fuel cells (SOFCs), numerous researchers have devoted considerable effort to fabricating the electrolytes as thin as possible. However, thickness is not the only factor that affects the electrolyte performance; roughness, grain size, and internal film stress also play a role. In this study, yttria-stabilized zirconia (YSZ) was deposited via a reactive sputtering process to fabricate high-performance thin-film electrolytes.

Novel Findings of Polypoidal Choroidal Vasculopathy via Optical Coherence Tomography Angiography.

Purpose: To introduce novel findings of polypoidal choroidal vasculopathy (PCV) via optical coherence tomography angiography (OCTA).

Methods: This study is a retrospective chart review of 16 patients (16 eyes) with PCV. OCTA (Avanti RTVue XR) findings were evaluated and selected for analysis after agreement by two retina specialists .

Short-duration multiple-session subthreshold micropulse yellow laser (577 nm) for chronic central serous chorioretinopathy: results at 3 years.

Objectives: To review the 3-year follow-up results of subthreshold micropulse yellow laser (SMYL) delivered by a short-duration multiple-session method for treatment of chronic central serous chorioretinopathy (CSC).

Methods: A total of 27 eyes from 27 patients with chronic CSC available for 3 years of follow-up were enrolled in this retrospective and interventional study. Patients were treated with 577-nm SMYL photocoagulation at a 15% duty cycle over multiple sessions, with low power ranging from 200 to 400 mW that was increased in 100 mW increments according to resolution of subretinal fluid at monthly follow-up.

Change in Anterior and Posterior Curvature After Cataract Surgery.

Purpose: To analyze the change in anterior and posterior corneal curvature after cataract surgery using a Placido-dual rotating Scheimpflug device.

Methods: In a prospective cross-sectional study, corneal curvature was measured using the Galilei G4 device (Ziemer Ophthalmic Systems, Port, Switzerland) preoperatively and 1 week and 1, 3, and 6 months after cataract surgery with a temporal limbal self-sealing 2.2-mm incision.

Acoustic analysis of snoring sounds recorded with a smartphone according to obstruction site in OSAS patients.

Snoring is a sign of increased upper airway resistance and is the most common symptom suggestive of obstructive sleep apnea. Acoustic analysis of snoring sounds is a non-invasive diagnostic technique and may provide a screening test that can determine the location of obstruction sites. We recorded snoring sounds according to obstruction level, measured by DISE, using a smartphone and focused on the analysis of formant frequencies.

The Role of Systemic Arterial Stiffness in Open-Angle Glaucoma with Diabetes Mellitus.

Purpose: To investigate the role of systemic arterial stiffness in glaucoma patients with diabetes mellitus (DM).

Design: Retrospective, cross-sectional study.

Participants: DM subjects who underwent brachial-ankle pulse wave velocity (baPWV) were recruited.

Associations between Optic Cup-to-disc Ratio and Systemic Factors in the Healthy Korean Population.

Purpose: To assess the relationships between optic cup-to-disc ratio (CDR) and age, sex, and other demographic and health characteristics in the healthy Korean population.

Methods: The study design was retrospective and population-based. A total of 28,377 subjects who participated in the Korea National Health and Nutrition Examination Survey between 2008 and 2011 were enrolled in this study.

Association of IOP with Systemic Factors in a Korean Cohort.

Purpose: To assess the relationship of intraocular pressure (IOP) to age, sex, and other demographic and health characteristics in a Korean cohort.

Methods: This retrospective cross-sectional study included subjects (n = 155,198) without glaucoma. All participants underwent health screening at the Kangbuk Samsung Hospital from August 2012 to July 2013.

The role of the maxillary sinus on the voice.

The objective of the study was to determine the effect of the maxillary sinus on the voice. The prospective study was conducted at an academic secondary referral center. A prospective chart review of 43 patients (17 males, 26 females) who conducted a voice recording and survey before and 3 months after middle meatal antrostomy whose lesion was confined to the maxillary sinus.

Efficacy and safety of transdermal fentanyl in the control of postoperative pain after photorefractive keratectomy.

Purpose: To evaluate the efficacy and safety of transdermal fentanyl (TDF) in the control of postoperative pain following photorefractive keratectomy (PRK).

Methods: One hundred ninety-nine consecutive PRK cases (398 eyes) were retrospectively reviewed. For postoperative pain control, 96 patients (63 females) were treated with tramadol 37.

A case of congenital aplasia of the epiglottis in an adult.

Aplasia or hypoplasia of the epiglottis in an adult is rarely reported congenital anomaly of the larynx. Most patients with epiglottic aplasia have presented fatal symptom of respiratory distress and severe aspiration in infancy or childhood. We present a case of congenital absence of the epiglottis found in a 33-year-old woman complaining of recurrent lingual tonsillitis.

Analysis of obstruction site in obstructive sleep apnea syndrome patients by drug induced sleep endoscopy.

Purpose: We analyzed site, pattern and degree of obstruction in Korean male obstructive sleep apnea syndrome (OSAS) patients by drug-induced sleep endoscopy (DISE). We also investigated possible links between BMI, AHI and DISE findings.

Materials And Methods: Sixty-nine male patients underwent DISE.

Complicated mumps viral infection: an unusual presentation affecting only submandibular gland.

This case is a single submandibular gland mumps viral infection patient without parotid gland involvement who developed complications of meningitis and orchitis. Since spontaneous remission is common in mumps viral infection, missing opportunities for exact diagnosis is frequent. As in this case, single submandibular glands infection without parotid gland involvement not only delays diagnosis but also increases risk of developing complications.