1.Clinical Study of Therapeutic Effect in Status Epilepticus.
Young Hyuk LEE ; Chang Jun COE
Journal of the Korean Pediatric Society 1986;29(1):72-78
No abstract available.
Status Epilepticus*
2.Isolated Musculocutaneous Nerve Palsy after the Reverse Total Shoulder Arthroplasty.
Sung Guk KIM ; Chang Hyuk CHOI
Clinics in Shoulder and Elbow 2016;19(2):101-104
Reverse total shoulder arthroplasty has been performed with promising results in rotator cuff tear arthropathy. However, the global complication of the reverse total shoulder arthroplasty is relatively higher than that of the conventional total shoulder arthroplasty. Neurologic complications after reverse total shoulder arthroplasty are rare but there are sometimes remaining sequelae. The cause of the neurologic complication is multifactorial, including arm traction, position and the design of the implant. Most cases of neurologic palsy following reverse total shoulder arthroplasty occur in the axillary nerve and the radial nerve. The authors report on a case of a 71-year-old man with isolated musculocutaneous nerve palsy after reveres total shoulder arthroplasty with related literature.
Aged
;
Arm
;
Arthroplasty*
;
Humans
;
Musculocutaneous Nerve*
;
Paralysis*
;
Radial Nerve
;
Rotator Cuff
;
Shoulder*
;
Tears
;
Traction
3.Production of IL - 6 and IL - 8 in Human Fibroblasts Stimulated with Mycoplasma Lysates and Bacterial Toxins.
Kwang Hyuk KIM ; Myung Woong CHANG
Journal of the Korean Society for Microbiology 1999;34(6):573-582
Cytokines are hormone-like proteins which mediate and regulate inflammatory and immune responses. The purpose of this study was to investigate the effect of lipopolysaccharide (LPS), Staphylococcus enterotoxin B (SEB), and Mycoplasma lysates on regulation of IL-6 and IL-8 production by human nasal fibroblasts. Primary cultured cells were incubated with LPS (1.0 ug/ml) from E.coli, SEB (1.0 ug/ml) from S.aureus, or Mycoplasma lysates (M.pneumoniae, Mp; M. fermentans, Mf; M. hominis, Mh, each 1.0 ug/ml). The culture supernatants were collected at 2, 6, and 24 hr and assessed for IL-6 and IL-8 production by enzyme-linked immunosorbent assay. The production of IL-6 in the culture supematant was downregulated by LPS, SEB, or Mycoplasma lysates. But IL-6 was upregulated by mixed exposure with Mp+LPS (2 hr), Mp+LPS+SEB (24 hr), Mf+LPS (24 hr), Mf+LPS+SEB (2 hr), Mh+LPS (24 hr), Mh+SEB (24 hr), or Mh+LPS+ SEB (24 hr). The production of IL-8 in the culture supematant was similar to that of IL-6 by same stimulants. But IL-8 was upregulated by mixed exposure with Mf+LPS+SEB (2 hr), Mh+LPS (24 hr), Mh+ SEB (24 hr), or Mh+LPS+SEB (24 hr). These studies show that costimulation of LPS or SEB with Mycoplasma whole cell lysates upregulates the production of IL-6 and IL-8.
Bacterial Toxins*
;
Cells, Cultured
;
Cytokines
;
Enterotoxins
;
Enzyme-Linked Immunosorbent Assay
;
Fibroblasts*
;
Humans*
;
Interleukin-6
;
Interleukin-8
;
Mycoplasma*
;
Staphylococcus
5.Detection of contaminated mycoplasmas on the cultured cell lines.
Myung Woong CHANG ; Kwang Hyuk KIM
Journal of the Korean Society for Microbiology 1993;28(3):209-221
No abstract available.
Cells, Cultured*
;
Mycoplasma*
6.Prevention of Heterotopic Bone Formation after Total Hip Arthroplasty in High Risk Patient with Radiation Therapy
Chang Dong HAN ; Chong Hyuk CHOI ; Chang Ok SUH
The Journal of the Korean Orthopaedic Association 1994;29(7):1738-1744
Heterotopic ossification(HO) is a frequent complication of total hip arthroplasty(THA), If it is sevre enough, it can convert a successful result of the operation into a poor one. Among several strategies that researches in recent years have tested, radiation therapy have been accepted to have efficacy for prevention of heterotopic ossification by many authors. While postoperative irradiation has been shown to lower the incidence of HO effectively in high risk patients following THA, patients in multiple dose protocols continue to develop some heterotopic ossifiction despite therapy and have some problems. Ninteen patients received single dose exposure to 600 rad delivered within 48 hours of THA with shielding of prosthesis region. The patients were considered high risk group for developing HO because of hypertropic osteoarthritis, post-traumatic osteoarthritis or the presence of previous formed ectopic bone. The average follow up period was 10.2 months(range 6 months
Arthroplasty, Replacement, Hip
;
Follow-Up Studies
;
Hip
;
Humans
;
Incidence
;
Ossification, Heterotopic
;
Osteoarthritis
;
Osteogenesis
;
Prostheses and Implants
7.Clinical Studies of Brain Abscess in Children.
Young Hyuk LEE ; Chang Joon GO
Journal of the Korean Neurological Association 1985;3(2):210-216
Clinical investigation of 20 cases of brain abscess has been done at the dept of Pediatric Yonsei Medical Center, who had been treated during the period of 8 years from January 1977 through Jun 1985. Following results has been obtained: 1. Of 20 patients, 14 patient was male and the rest 6 was female rating M:F ratio 2.3:1 and the youngest patient was undler 1 year, the oldest one was 15 years old. 2. The chief complaints at admission were headache, fever, vomiting in order of frequency, while neurologic signs were neck stiffiness, hemiparesis, papilledema etc. 3. The preceeding causative diseases of brain abscess were diseases involving ENT 15%, congenital heart disease 20%, head trauma 35% and the rest 20% the etiology of brain abscess was not determined. The abscess tended to occure at temporoparietal area in the cases associated with otitis media while abscess originating from congenital heart diseases tended to occure multiple area. 4. 10 cases out of 20 had lumbar puncture under the suspision of meningitis, 2 cases manifested normal CSF finding. Patients who has focal neurologic finding associated with OMPC or congenital heart disease should suspect for brain abscess, which can be easily conform by brain C-T scan as well as patient who manifested unusual clinical course. 5. Factor relating prognosis were mental state and duriation between onset of clinical symptom and time starting treatment; clear mental state and short duration reflect better prognosis. 6. The motality rate was 33%, and the neurologic sequelas were hemiparesis (36.4%), mental deficit (18.2), dysarthria, epilepsy, hydrocephalus and blindness.
Abscess
;
Adolescent
;
Blindness
;
Brain Abscess*
;
Brain*
;
Child*
;
Craniocerebral Trauma
;
Dysarthria
;
Epilepsy
;
Female
;
Fever
;
Headache
;
Heart Defects, Congenital
;
Heart Diseases
;
Humans
;
Hydrocephalus
;
Male
;
Meningitis
;
Neck
;
Neurologic Manifestations
;
Otitis Media
;
Papilledema
;
Paresis
;
Prognosis
;
Spinal Puncture
;
Vomiting
8.The clinical characteristics of insomnia in general hospital inpatients.
Jong Gook LEE ; Chang Hwan HAN ; Tae Hyuk YOO
Journal of Korean Neuropsychiatric Association 1991;30(1):125-134
No abstract available.
Hospitals, General*
;
Humans
;
Inpatients*
;
Sleep Initiation and Maintenance Disorders*
9.DIMENSIONAL ACCURACY OF DENTURE BASE USING LASER SCANNER OF REVERSE ENGINEERING TECHNIC.
Si Hyuk LEE ; Ik Tae CHANG ; Soon Ho YIM
The Journal of Korean Academy of Prosthodontics 1999;37(2):167-184
The purpose of this study was to evaluate and compare the fit of denture bases processed by injection pressing technic using laser scanner of reverse engineering technic. The auther duplicated 20 maxillary edentulous models and 20 mandibular edentulous models, which were scanned on HYSCAN 45C 3D SCANNER(Hymarc Co., Canada). The scanned data was stored in the personal computer using SURFACER (Imageware Co., U.S.A.) software program. After 40 dentures were cured by PERform Inkovac system. SR-Ivocap system, Palajet system, and Sulfon system, they were stored in water at room temperature for 24 hours. The dentures were scanned on HYSCAN 45C 3D SCANNER(Hymarc Co. Canada). The scanned data were stored in the personal computer using SURFACER (Imageware Co., U.S.A) software program. By overlapping two images using the same program, the fit between two surfaces was scaled by positive and negative errors. The obtained results were as follows : 1. In the upper denture, most of the positive errors occurred on the lingual side of anterior alveolar ridge and the negative errors were on the flange of denture bases. 2. In the lower denture, most of the positive errors occurred on the inner side of lingual flange and the negative errors were on the border of anterior labial flange areas. 3. There were no statistical differences among the positive errors of the four types of inject-ion denture curing methods and also no statistical differences between negative errors except only in negative maximum errors. 4. In PRERform system and SR-Ivocap system, they have the tendency of inaccurate fit lower denture bases comparing to that of upper denture bases. 5. The negative error scales were greater than the positive error scales in all types of inject-ion denture curing methods.
Alveolar Process
;
Denture Bases*
;
Dentures*
;
Microcomputers
;
Water
;
Weights and Measures
10.A study of artifacts in MR imaging induced by metalic aneurysm clips.
Joo Hyuk LEE ; Kee Hyun CHANG ; Jae Hyung PARK
Journal of the Korean Radiological Society 1992;28(2):307-313
To investigate MR artifacts induced by metallic implants, scans were obtained using both the ferromagnetic Drake lip and the non ferromagnetic Yasargil clip. Scan were taken through the area of clips using geometrical phantom. The MRI was performed by spin echo technique and gradient echo technique on both 2.0T and 0.5T MR unit. The luthors evaluated the nature and differences of artifacts in each sequence and parameter. Artifacts induced by both lips were noted in the direction of frequency encoding gradient, and consisted of region of signal loss abutted in one side by survilinear region of bright signal. Geometric distortion of image was marked in the Drake clip, out was minimal in the Yasargil clip under both 2.0T and 0.5T. Artifacts were more pronounced in the gradient echo technique than those of the spin echo technique on both 2.0T and 0.5T. Although there were no differences n the nature of artifacts induced by the Drake clip among each parameter in the spin echo technique under 2.0T, artifacts were slightly more pronounced on T2 weighted image under the 0.5T field, but no differences were found in the nature of artifacts induced by the Yasargil clip in the spin echo technique under, both the 2.0T and 0.5T fields. Marked artifacts were induced through the small area of the Drake clip which were included in the scan plane, but induced artifacts were small when a small area of the Yasargil clip was included in the scan plane. It seemed likely hat artifacts were slightly more pronounced in the 2.0T than the 0.5T field in both clips, but objective evaluation of the difference was difficult, In conclusion, these results can be an essential basis for the interpretation of MR images or patents with metallic inplants.
Aneurysm*
;
Artifacts*
;
Lip
;
Magnetic Resonance Imaging*
;
Magnets