• The Korean Journal of Pain
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• v.10 no.1
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• pp.113-116
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• 1997

Sensorineural hearing loss(SNHL) is defined as a sudden hearing impairment which was develope over a period of hours to days. The definitive cause of SNHL is unknown in most cases. Disturbance of the blood flow of the inner ear is a main causal hypotheses. Most symptomatic treatment is focusing to improving the blood flow of the inner ear. At our hospital, most patients are recommended to bed rest, vasodilators(nicotinic acid, antihistamines) and stellate ganglion block(SGB) for two weeks. We experienced two cases of recurrence immediately after recovery from SNHL. They discontinued SGB after initial recovery. due to associated pain with operation and or psychologic stress. One patient resumed SGB and medication treatment, but the second who gave up treatment was not recovered. Therefore, we recommend to continuance of treatment of stellate ganglion blocks to improve recovery rate of SNHL and avoid further trauma and psychologic stress during the recovery period of SNHL.

• Investigative Magnetic Resonance Imaging
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• v.25 no.3
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• pp.197-200
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• 2021

Ramsay Hunt syndrome (RHS) is a disease caused by varicella-zoster virus (VZV) infection that can be diagnosed through clinical symptoms with or without imaging evaluations. The typical features of RHS on imaging evaluation include signal changes and enhancement in the internal auditory canal (IAC) nerves, and the labyrinthine segment of cranial nerve VII (CN VII) and cranial nerve VIII (CN VIII). In some patients, inner ear structure (cochlear and vestibular apparatus) is involved in RHS. Neurologic complications, such as encephalitis and meningitis, are rare in RHS, but are known to occur. Therefore, magnetic resonance imaging (MRI) is necessary to detect both abnormal signal intensity in the IAC, CN VII, CN VIII, inner and ear structure, and CNS complications. We report an RHS patient with CN VII, VIII, and leptomeningeal enhancement within the cerebellar folia on 10-min delayed, contrast-enhanced (CE), three-dimensional fluid-attenuated inversion recovery (3D-FLAIR) imaging.

• The Journal of Internal Korean Medicine
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• v.21 no.1
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• pp.181-184
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• 2000

Dizziness is one of common diseases clinically, it is defined as a hallucination or an illusion of motion that causes sensation disorder of circumstance, and described as circulatory. rotatory leaning. shaking sensation. In particular, benign paroximal positional vertigo(BPPV) is one of peripheral vertigo, it causes dizziness due to debris which has collected within a part of the inner ear. Chemically, debris are small crystals of calcium carbonate. They are derived from structures in the ear called 'otoliths' that have been damaged by head injury, infection, or other disorder of the inner ear, or degenerated because of advanced age. The symptoms of BPPV include dizziness or vertigo, lightheadedness, imbalance, and nausea, Activities which bring on symptoms will vary in each person, but symptom are almost always precipitated by a position change of the head or body. As for treatment of vertigo, it is differentiated as excess in the upper and deficiency in the lower(上實下虛) and treated in oriental medicine and are used to stability. antihistaminics . anticolinergics . vestibule control drug of GABA system in western medicine. Moreover, Dix-hallpike maneuver is applicated in diagnosis and treatment of BPPV patients. A case of dizziness patient suggested benign paroximal positional vertigo who is diagnosed as weakly dizziness(虛暈)showed prominent improvement by Jaeumkunbitang-gamibang(滋陰建脾湯) and Dix-hallpike maneuver.

• Journal of Sensor Science and Technology
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• v.6 no.6
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• pp.466-475
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• 1997

In this paper, an implantable middle ear hearing aids using an electromagnetic transducer which consists of a tiny coil and a magnet is designed, and objective design method to implement a vibrator of the electromagnetic type transducer is proposed. Sound characteristic of the electromagnetic type vibrator is excellent but power transfer rate is lower than that of a ceramic type. To improve power transfer efficiency of system, external and inner part of a middle ear system is designed using FM transmission method. We implemented an experimental set of the designed transducer, inner part, and outer part. Then, we measured vibration characteristics of a metal strip and a temporal bone of a dead body. As the results, we confirmed the advantage of FM method and showed that designed transducer could effectively transmit vibration of amplified input sound pressure to ossicle.

• The Journal of the Acoustical Society of Korea
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• v.24 no.1E
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• pp.1-6
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• 2005

The inner hair cell stereocilia of the guinea pig cochlea was examined under a scanning electron microscope (SEM) after loud tone exposure onto the ear drum of the animal. Before and after guinea pigs were exposed to intensive and continuous tone such as 106 dB SPL in intensity, the functioning of the cochlea was monitored by N1-N2 audiograms. The structural damage of the stereocilia of inner hair cells (IHCs) and outer hair cells (OHCs) was examined using the SEM in x 1500 magnification. The comparison between the functional change of the cochlea and the structural damage of the IHC stereocilia is done by means of photographic observation. It can be shown that the functional change might be related to the structural damage of the IHC stereocilia after intensive acoustic trauma.

• Journal of Sasang Constitutional Medicine
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• v.10 no.2
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• pp.221-270
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• 1998

Objective This research is a study about constitutional diagnosis through the external appearances as a basic principle, and it is for finding shape differences of the ear, eye, nose, mouth according to the Sasang constitution Method We have collected 209 cases of patients of the Sasang Constitutional Department, including employees of the Kyung-Hee Medical Center and took pictures of the frontal view, lateral view, oblique view of face and measured heights, deapth, breadths of ear, eye, nose, mouth with 'The Measurement of R. Martin'. We analyzed shape differences of the face according to the Sasang constitution with certain results Results We got the morphologic characteristics of ear, eye, nose and mouth according to the Sasang constitution as Table 3. -Table 10. Conclusion : 1. The morphologic characteristics of Ear according to the Sasang constitution (1) Morphologic ear length, Physiognomic ear length, Ear lobule length is longer in Taeumin than Soeumin. (2) Physiognomic ear breadth is wider in Taeumin than Soeumin. (3) Physiognomic ear length, lobule length ratio is higher in Taeumin than Soyangin. 2. The morphologic characteristics of Eye according to the Sasang constitution. (1) Inner Palpebral fissure width, 5th Palpebral fissure length, Bizygomatic breadth-Outercanthal distance is the longest in Taeumin (2) Palpebral fissure inclination is widest in Soeumin. (3) Palpebral fissure length is longer in Taeumin than Soeumin. (4) Pupillary diameter ratio is the lowest in Taeumin (5) Palpebral fissure length, width ratio is higher in Soeumin than Taeumin. (6)zygomatic breadth, Bizygomatic breadth-Outercanthal distance ratio is the higher in Taeumin than Soeumin. 3. The morphologic characteristics of Nose according to the Sasang constitution. (1) Nasion depth is deepest in Soyangin. (2) Nasion to pupillary depth is deeper Soyangin than Taeumin. (3) Nasal tip depth, Nostril to Nasalalar depth is deeper Soyangin than Taeumin. (4) Subnasale to Nasalalar depth is the shallowest in Taeumin (5) Nasalalar height is lowest in Soeumin. (6) Nasalalar to Nostril distance is deeper Taeumin than Soeumin. (7) Nasal tip depth, Nasal depth ratio is the highest in Taeumin (8) Nasal depth Nasalalar heightratio is lowest in Soeumin. (9) Midfaceheight, Nasal tip depth ratio is higher Soyangin than Taeumin. 4. The morphologic characteristics of mouth according to the Sasang constitution. (1) Lower mid lip height, Lower philtrum height, Lower quarter lip height, Total middle lip height, Total philtrum height, Total quarter lip height is the shottest in Soyangin. (2) Upper mid lip height, Upper philtrum height is longer in Taeumin than Soyangin (3) Lip inclination is higher in Soeumin than Soyangin. (4) Intercheilion breadth, total height ratio is lowest in Soyangin. (5) Total lip height, Upper philtrum height ratio is higher in Soyangin than Soeumin. (6) Lower lip height Lower quarter lip height ratio is higher in Soyangin than Taeumin. (8) Total lip area is wider in Taeumin than Soyangin.

• Journal of the korean academy of Pediatric Dentistry
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• v.47 no.1
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• pp.62-69
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• 2020

This study intended to evaluate noise level of dental handpieces and the effects of noise cancelling devices. An ear model was designed to measure the level of the noise delivered to the inner ear during dental handpiece operation. The level of noise was measured in various conditions using the ear model and the portable noise meter. Noise level was measured again after applying of 4 different noise cancelling devices to the model ear. The noise level of dental handpieces was 82.5 - 84.4 dB. When 4 types of noise canceling devices were applied, the noise level reduced to 67.4 - 73.8 dB. All 4 devices had statistically significant effect in reducing the noise of the handpiece. Considering the intensity and exposure time, noise in dental clinics can cause hearing damage to dentists. For protection from the risk of occupational hearing damages, noise canceling devices can be recommended.

• Journal of Sensor Science and Technology
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• v.14 no.5
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• pp.322-330
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• 2005

A new type of transducer, piezoelectric floating mass transducer (PFMT) which has advantages of piezoelectric and electromagnetic transducer has been proposed and implemented for the implantable middle ear hearing devices. By the uneven bonding of piezoelectric material to the inner bottom of transducer case, the PFMT can vibrate back-and-forth along the longitudinal axis of the transducer even though the piezoelectric material within the cylindrical case produces only the bilateral expansion and contraction according to the applied electrical signal. To improve efficiency of the PFMT, the multi-layered piezoelectric material has been adapted. The small number of components in the PFMT enables the simple manufacturing and the easy implanting into the middle ear. In order to examine the characteristics of vibration, mechanical modeling and finite element analyses of the proposed transducer have been performed. From the result of theoretical analyses and the measured data from the experiment, it is verified that the implemented PFMT can be used in implantable middle ear hearing devices.

• Journal of the Optical Society of Korea
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• v.15 no.1
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• pp.74-77
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• 2011

We report a novel extension of 840 nm wavelength- based spectral domain optical tomography to in vivo/real-time human middle ear diagnosis. The system was designed to access the middle ear region with a specifically dedicated handheld probe. The real-time displaying feature was mandatory for in vivo imaging human subject with the handheld probe, and the system could provide about 20 frames per second for 2048 pixels by 1000 A-scans without using any graphics process units under the Labview platform. The inner ear structure of a healthy male volunteer was imaged with the developed system with the axial and lateral resolutions of $15\;{\mu}m$ and $30\;{\mu}m$, respectively. The application of the OCT technology to early diagnose otitis media(OM) is very promising and could be another extensive branch in the OCT field because it provides the depth resolved image including tympanic membrane (TM) and structures below TM whereas the conventional otoscope technique only gives asurface image of the TM.

• Journal of Veterinary Clinics
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• v.21 no.2
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• pp.187-190
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• 2004

A mixed case of multiple sebaceous gland adenoma and perianal gland adenoma was found in a 11-year-old male Shih Tzu dog. Grossly, many masses less than 1 cm in diameter of back skin and single red-brown mass about 0.5 cm in diameter of inner ear were noted. In addition one of light-pink mass 5 cm in diameter was presented in the anus. All of the masses were well demarcated and dome-shaped or papillated nodules. Histologically, the mass from back and ear were composed with multiple irregular shaped or sized lobules of sebaceous glands. Masses were containing mostly mature sebaceous cells and multifocal cystic degeneration with acellular and bright eosinophilic materials. And the mass from peri-anal area was well-circumscribed and composed of broad, anastomosing trabeculae of well-differentiated hepatoid cells. There were very low mitotic figures in all masses. Based on these results, this case was diagnosed as the multiple sebaceous gland adenoma and perianal gland adenoma.