Jeong Seung-gyu

BACKGROUND: Knowledge on the airflow patterns in the nasal cavity is essential to understanding the function of the nasal cavity. This study has attempted to observe the breath cycle of nasal airflow during respiration at rest. METHODS: We constructed a nasal cavity model by rapid prototyping using 1.25-mm-thick CT data and devised a piston pump driven by a cam, to simulate respiration at rest. The airflow was evaluated with particle image velocimetry and visualized in coronal reconstructed imag

BACKGROUND: Of 15 patients with primary unilateral antrochoanal polyps (ACPs), we noticed that all ACPs except one extended through the accessory ostium of the maxillary sinus projected posterior along the nasal cavity. We observed no structural changes in ostiomeatal area on a coronal computed tomography scan. METHODS: We classified 15 patients with ACP into three stages according to the coronal computed tomography findings of (i) status of the accessory ostium of the maxillary sinus and (ii) l

We report a case of one asymptomatic 28-year-old male with mucus circulation between the natural ostium and the accessory ostium of the maxillary sinus. Computerized tomography (CT) revealed a recirculating mucus ring between the two ostia of the maxillary sinus.

The roof of the anterior ethmoid swings up anteriorly from its more or less horizontal course at the point where the anterior ethmoid canal (AEC) is situated. The AEC is an important structure in endoscopic sinus surgery since its injury results in bleeding into the nasal cavity and may result in intraorbital bleeding. We therefore investigated the location of this canal and the anatomic characteristics of the area surrounding the canal using coronal computed tomography (CT) of the paranasal sin

A single coronary artery (SCA) is a rare congenital anomaly of the coronary circulation, which is often associated with myocardial ischemia and other congenital cardiac anomalies. A 77-year-old woman visited our hospital complaining of typical chest pain. Coronary angiography revealed an isolated SCA. The right coronary artery did not originate from the aorta, but instead emerged from the distal left circumflex artery, with significant stenosis at the proximal portion of the left anterior descen

BACKGROUND AND OBJECTIVES: The aim of this study was to determine the relationship between the continuous positive airway pressure (CPAP) titration level and upper airway variables in obstructive sleep apnea syndrome (OSAS). SUBJECTS AND METHODS: Forty-seven patients suffering from OSAS were enrolled in this study. They were asked to answer a questionnaire about nasal stuffiness and mouth breathing, and the degree of tonsillar hypertrophy and shape of the oropharyngeal inlet were evaluated. The