• Tuberculosis and Respiratory Diseases
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• v.53 no.4
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• pp.445-449
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• 2002

An 18-year-old female was admitted because of dyspnea at rest. A chest computed tomography (CT) scan and fiberoptic bronchoscopy demonstrated a polypoid tumor in the left main bronchus, 0.5cm distal from the carina. Surgical resection of the tumor was performed, along with. A pathological evaluation and the immunohistochemical findings led to the diagnosis of a glomus tumor, which originated from the bronchus, an area where this type of tumor has rarely been reported.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.29 no.1
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• pp.5-8
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• 2018

Patients who have the head and neck cancer are usually treated by surgery, radiation therapy, chemotherapy, or combinations of them. These treatments can induce variable degree of aspiration with dysphagia. The type and severity of aspiration depends on the size and location of the original tumor, the structures involved, and the treatment modality used for treatment. The management of aspiration after the head and neck cancer's treatment begins with an accurate evaluation for the cause and mechanism of aspiration through modified barium swallow (MBS) and fiberoptic endoscopic examination of swallowing (FEES). Then, the clinician can use postures, maneuvers, and exercises to treat the swallow disorder and to help the patient achieve optimal function. To achieve optimal swallowing without aspiration, multidimensional rehabilitation by various medical personnel is definitely necessary.

• Tuberculosis and Respiratory Diseases
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• v.56 no.2
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• pp.198-202
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• 2004

Tracheopathia osteoplastica(TO) is a rare, clinical and pathologic benign condition of unknown cause and characterized by submucosal cartilaginous or bony projections into tracheobroncheal lumen, usually not involved posterior membranous portion of tracheobroncheal tree. We report two cases of tracheopathia osteoplastica that involved trachea and both main bronchus, diagnosed by chest CT, fiberoptic bronchoscopic biopsy.

• Journal of Chest Surgery
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• v.37 no.8
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• pp.707-710
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• 2004

Bridging bronchus (BB) is an extremely rare tracheobronchial anomaly. This anomaly is often associated with a sling left pulmonary artery (SLPA) and is diagnosed in infancy or at autopsy. A 29-year-old female patient with previous history of pulmonary tuberculosis was admitted because of persistent fever, cough and sputum. Fiberoptic bronchoscope and chest computed tomography revealed a bridging bronchus and associated atelectasis. The right middle and lower lobe was supplied by a bronchus which originates from the left main bronchus and bridges the mediastinum. There was no anomaly of a left pulmonary artery. Right middle and lower bilobectomy was performed.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.22 no.2
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• pp.106-110
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• 2011

Western classical singing voices are different from those of pop song singer's singing voices as well as traditional Korean singing such as Pansori. We anlalysed the singing voices from three different categories with using free application programs available at the usual smart phones : sound level meter and Spectral View Analyzer and fiberoptic rhinolaryngoscopic evaluation. The intensity of voice produced by a classical western singer was 11 dB louder than that produced by a pop song singer. Source sound, glottic sound, as well as harmonic sound and singing resonant sound (Singer's formant) are much more prominent. When evaluated under video-rhinolaryngoscopy during singing, the resonance cavity especially oropharyngeal cavity and hypopharyngeal cavity are widely opened during singing of the western classical singer than those of the traditional Korean singer's singing. Difference of singing methods including producing the glottal sound, respiration and resonance are discussed. Possible explanation of development of 'Singer's Formant' is discussed.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.20 no.1
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• pp.11-16
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• 2009

OPD based laryngeal procedures offers a new avenue to the modern laryngologist, incorporating new technology in the office setting. With the development of flexible fiberoptic endoscopes, compact video system, and short acting anesthetics and sedatives allow these procedures. The success or failure of procedures are depend on excellent topical anesthesia. An inadequately anesthetized patient is apt to be uncomfortable, anxious and hyperresponsive and therefore unlikely to tolerate the procedure. On the other hand, a patient who is well informed, reassured, and thoroughly anesthetized can complete procedures. Therefore, optimal anesthesia is obligatory for excellent surgical results. The phonosurgeon should choose the anesthetic and sedative agents based on duration of action, time of onset of action, and any medical contraindications that the patient may have. And should be familiar with the properties and interaction of the agents used, as well as the signs of toxicity.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.49 no.7
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• pp.418-423
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• 2000

The fiber Fabry-Perot interferometric(FFPI) sensor is well known in the field of industrial diagnosis due to its outstanding properties such as tiny size, simple and rugged structure, and easy interrogation. As other fiber interferometric sensors, it also suffers from ambiguous output caused by highly periodic feature in its optical transfer function. In most cases, the ambiguity leads to relatively short dynamic operating range and long processing time during power-on reset, which limits its application to some specific fields requiring very high resolution. In this paper a method based on double sensing scheme was proposed to overcome the above difficulty. By employing a fringe selection auxiliary FFPI sensor the original FFPI sensor can identify its true position on the phase domain. The performance test with 10mm FFPI sensor and a thermocouple temperature sensor for reference shows wide dynamic range 0-900$\ell$ keeping a reasonable resolution of 0.1$\ell$ over the entire range.

• Journal of Chest Surgery
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• v.29 no.2
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• pp.208-212
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• 1996

From 1990 to 1994, 10 patients were treated for tracheobronchial injury due to blunt trauma. 7 injuries resulted from motor vehicle accident. Common presenting signs included subcutaneous emphysema, dyspnea and hemoptysis. The most common radiologic findings were pneumothorax, pneumomediastinum and hemothorax. The fiberoptic bronchoscopy was highly accurate method for the diagnosis. The operation method is simple closure except one patien underwent right pneumonectomy. One patient died because of respiratory distress and 9 patients recovered uneventfully and returned to normal activity. Early recognition and proper treatment of tracheobronchial injury is important.

• Korean Journal of Optics and Photonics
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• v.16 no.4
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• pp.319-325
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• 2005

A signal processing method for white light interferometry (WLI), which performs a series of analog signal processing steps to locate the central interference fringe position at high speed: is developed and applied to a WLI temperature sensor system. We found that the new method has random walk of $0.019^{\circ}C/\sqrt{Hz}$ with good linearity. However, the temperature change in the path-matching interferometer results in drift of the measured sensor output. The temperature dependence of drift in the WLI temperature sensor system, was calculated to be $1.42{\mu}m/^{\circ}C$. It is also found that the relationship between the peak spacing in the interferogram and the spacing measured by the method can be nonlinear when the fringe spacing is comparable to the coherence length of the source.

• Tuberculosis and Respiratory Diseases
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• v.38 no.2
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• pp.172-178
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• 1991

It is a rare case that fistula between the tracheobroncheal tree and the esophagus are cause by tuberculosis. We experienced the case of tuberculosis of the stomach with broncheoesophageai fistula, which was treated medically. Fiberoptic biopsy revealed tuberculous granuloma at esophagus and gastric cardia site. The patient had good response to antituberculous therapy with complete resolution without any surgical procedure.