1.Surgical Treatment of a Chordoma Arising from the Second Thoracic Vertebral Body through the Modified Anterior Approach: Case Report.
Jong Won LEE ; Young Baeg KIM ; Seung Won PARK ; Sung Nam HWANG ; Duck Young CHOI
Journal of Korean Neurosurgical Society 2000;29(4):574-579
No abstract available.
Chordoma*
2.A Case of Intramedullary Schwannoma at the Cervicomedullary Junction: A Case Report.
Jong Won LEE ; Seung Won PARK ; Young Baeg KIM ; Sung Nam HWANG ; Duck Young CHOI
Journal of Korean Neurosurgical Society 2000;29(9):1238-1242
No abstract available.
Neurilemmoma*
3.Reference Values of Cadmium in Kidney and Liver in Korean.
Jung Duck PARK ; Byung Sun CHOI ; Il Hoon KWEON ; Yeon Pyo HONG ; Im Won CHANG
Korean Journal of Occupational and Environmental Medicine 2000;12(3):346-355
OBJECTIVES: Cadmium (Cd), a toxic and non-essential metal, is recognized as a human carcinogen, which has a tendency to accumulate in the human body. The levels of Cd in renal cortex and liver are good indicators as an index of Cd exposure in the general population. In this study, we present an estimation of reference Cd levels in tissue (renal cortex and liver) and total body burden in the general population of Korea. MEDTHODS: Cd and zinc (Zn) were analyzed in renal cortex and liver from 254 autopsies (male : 188 cases, female : 66 cases) aged 0 to 87 years. RESULTS: Geometric mean concentration of Cd was 27.4 and 3.1 ua/g wet weight in renal cortex and liver, respectively. The level of Zn in renal cortex and liver was 35.4 and 42. 6 v/g wet weight, respectively. The result suggests that kidney is the target organ for Cd accumulation. The accumulation of Cd in renal cortex was age-dependent with a biphasic pattern. The level of Cd in renal cortex increased with age up to the fifties, and then leveled off thereafter. Based on the data, the regression model for Cd accumulation in renal cortex by age is predicted by : Log KCd = 0. 2325 + 0. 0553 Age 0. 0005 Age. The highest Cd accumulation in renal cortex of Koreans was estimated at 43. 3 ua/g wet weight at 50. 8 years old. In addition, the total Cd body burden by age was estimated by the following equation: Total Cd Body Burden = -4. 5948 + l. 2278 Age - 0. 0121 Age. The highest body burden of Cd was estimated at 26. 5 mg at age 50. 7 years in the Korean general population. The positive correlation between Zn and Cd was observed in renal cortex and liver. CONCLUSIONS: The level of Cd exposure in Korean was found to be lower than in Japanese, but same as or higher than in American and Europeans.
Asian Continental Ancestry Group
;
Autopsy
;
Body Burden
;
Cadmium*
;
Child
;
Female
;
Human Body
;
Humans
;
Kidney Cortex
;
Kidney*
;
Korea
;
Liver*
;
Reference Values*
;
Zinc
4.CLINICAL EVALUATION ON THE MOUTH REHABILITATION USING DENTAL IMPLANTS.
Young Duck JEE ; Kyu Hwan CHOI ; Bok Gi MIN ; Won Bo SHIM ; Dong Keun LEE
Journal of the Korean Association of Oral and Maxillofacial Surgeons 1997;23(4):736-748
The use of osseointegrated implants is an accepted procedure for the treatment of Total, or partial edentulism and offers good predictability of long-term success. Osseointegration implies a firm and direct interlocking between vital bone and screw-shaped titanium implants. There should be not to interposed tissue between fixture and bone. This study was undertaken to assess the clinical condition, complication, and prosthodontic aftercare of different implant systems. One hundred fifty-nine patients treated with a total of 503 endosseous implants (364 Steri-oss threaded type, 69 Integral cylinder with HA coated type, 35 Steri-oss threaded with HA coated type, 21 Steri-oss cylinder with HA coated type and 14 3i implant type), Most of the implant were placed in type B and C bone quantity and type 2 and 3 bone quality according to Lekhorm and Zarb. The success rate of Steri-oss threaded type during healing and function was 92%, Steri-oss threaded type with hydroxyapatite coated was 91%, Steri-oss cylinder type with hydroxyapatite coated was 90%, Integral cylinder type with hydroxyapatite coated was 90% and 3i implant type was 93%. One hundred twenty-nine patients had been treated with implant prosthesis. 79 of these patients had received a fixed type prosthesis and 50 patients had received a removable type prosthesis. There were no differences between the implant systems with regard to age, gender. Failures were associated with poor bone quality, smaller implant sizes, a surgical installation technique and stress distribution when in function. Visual analgoue scales recorded as satisfied results functionally and esthetically, but 15% dissatified with chewing ability.
Aftercare
;
Dental Implants*
;
Durapatite
;
Humans
;
Mastication
;
Mouth Rehabilitation*
;
Mouth*
;
Osseointegration
;
Prostheses and Implants
;
Prosthodontics
;
Titanium
;
Weights and Measures
5.A Case of Pituitary Abscess with Abnormal MRI Features: A Case Report.
Sang Woo PARK ; Sung Nam HWANG ; Seung Won PARK ; Young Baeg KIM ; Duck Young CHOI
Journal of Korean Neurosurgical Society 2000;29(7):945-948
No abstract available.
Abscess*
;
Magnetic Resonance Imaging*
6.Mn-SOD Immunoreactivities of Rectus Femoris Muscle of the Rat in Reperfusion Injury and the Effects of Alopurinol Pretreatment.
Chi Won HWANG ; Duck Ho CHOI ; Geun Ryeol JO ; Doo Jin PAIK
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1999;26(2):245-251
It has been well known that ischemia reperfusion injury to skeletal muscle following an acute arterial occlusion causes significant morbidity and mortality. There are many causes of reperfusion injury, but the oxygen free radicals have a significant role. During ischemia the ATP is catalyzed to hypoxanthine anaerobically and hypoxanthine dehydrogenase is converted to xanthine oxidase under the presence of O2 resulting in the production of cytotoxic oxygen free radical, which are harmful to muscle. The reactivity of superoxide dismutase(SOD), one of the major antioxidant enzymes, is increased against the formation of the superoxide radical during reperfusion. SOD metabolyzes the superoxide radical to H2 O2 and O2.The severity of ischemic damage deports on the duration of muscle ischemia. The reversible changes in the muscle occur afar 2 hours of ischemia and recover within 24 hours after reperfusion. After 6 hours ischemia, irreversible damage occurs and causes necrosis of muscle. The authors performed the resent study to investigate the changes of Mn-SOD and the effects of allopurinol, the inhibitor of xanthine oxidase, by measuring the immunoreactivitiy of the ischemic reperfused rectus femoris muscle of rats after 2 hours and 6 hours ischemia and timely reperfusion. A total of 176 healthy spraque-Dawley rats weighing from 200 gm to 250 gm were used. Under urthane(3.0 gm/kg.,IP) anesthesia, a lower-abdominal incision was made and the left common iliac artery was ligated by using a vascular clamp for 2 hours and 6 hours. Rectus femoris muscle was obtained at 0 hour, 1 hour, 2 hours, 24 hours, and 48 hours after removal of the vascular clamp. The specimens were sectioned in 14micro miter thickness with a cryostat. The immunoreactivities of Mn-SOD were observed by using Mn-SOD antibodies. The result were as follows. 1. The immunoreactivies of Mn-SOD around sarcolemma were stronger than those on the sarcoplasm. 2. The immunoreactivities of Mn-S0D after 2 hours of ischemia increased to moderate or weak reactivities at 1 hour and 2 hours of reperfusion and returned to week or trace reactivities at 24 hours and 48 hours of reperfusion 3. The pretreatment of allopurinol decreased the immunoreactivies of Mn-SOD during reperfusion. The pattern of changes of SOD immunoreactivies were similar, but the range of changes significantly decreased. 4. The immunoreactivies of Mn-SOD after 6 hours of ischemia increased after 6 hours of ischemia increased after reperfusion and showed peak at 2 hours and 24 hours specimen. After 48 hours in the reperfused group, the reactivities slightly decreased. 5. After 6 hours in the ischemia-reperfused group, the pretreatment of allopurinol decreased the immunoreactivies of Mn-SOD during reperfusion, but the effects were weak. These results suggest that the immunoreactivities of the 6 hours ischemia reperfused group were higher than those of 2-hours ischemia reperfused group in the rectus femoris muscle of rats and that allopurinol pretreatment can be credited with decreasing ischemia reperfusion injury within a reversible period.
Adenosine Triphosphate
;
Allopurinol
;
Anesthesia
;
Animals
;
Antibodies
;
Free Radicals
;
Hypoxanthine
;
Iliac Artery
;
Ischemia
;
Mortality
;
Muscle, Skeletal
;
Necrosis
;
Oxygen
;
Quadriceps Muscle*
;
Rats*
;
Reperfusion Injury*
;
Reperfusion*
;
Sarcolemma
;
Superoxide Dismutase*
;
Superoxides
;
Xanthine Oxidase
7.Common peroneal injury mistaken neuraxial analgesia complication after vaginal delivery: A case report.
Ryung A KANG ; Duck Hwan CHOI ; Ji Won CHOI
Anesthesia and Pain Medicine 2014;9(2):134-137
Common peroneal neuropathy during normal delivery is associated with instrumentation and prolonged time spent in a certain position. We report a case of unilateral common peroneal neuropathy in a vaginal delivery patient under labor analgesia with the combined spinal-epidural technique. A 29-year-old woman complained of weakness and numbness of the left foot two days after vaginal delivery. Neurologic examination and electrodiagnostic testing confirmed left common peroneal neuropathy. The patient was referred for rehabilitation, which substantially improved her mobility and function, and prevented secondary damage. The patient had not fully recovered at three months after the delivery. The possible etiology of the postpartum common peroneal neuropathy was most likely prolonged and excessive pressure around the knee by assistants. Excessive compression during delivery should be minimized or avoided. Patient education and awareness among the labor and delivery team will prevent this complication. Neurologic complications related to epidural analgesia should also be ruled out in these patients.
Adult
;
Analgesia*
;
Analgesia, Epidural
;
Female
;
Foot
;
Humans
;
Hypesthesia
;
Knee
;
Labor, Obstetric
;
Neurologic Examination
;
Patient Education as Topic
;
Peroneal Neuropathies
;
Postpartum Period
;
Pregnancy
;
Rehabilitation
8.Attenuation of endothelial relaxation in umbilical arteries from preeclampsia patients.
Sei Kwang KIM ; Hyung Min CHOI ; Yong Won PARK ; Jae Wook KIM ; Duck Sun AHN ; Bok Soon KANG
Korean Journal of Obstetrics and Gynecology 2000;43(6):1043-1050
OBJECTIVES AND METHODS: To directly examine the function of the endothelial cell(EC) and smooth muscle cell in umbilical arteries acquired from preeclampsia patients between June 1998 to November 1999, using a conventional tension measurement and bioassay experiment. RESULTS: Relaxation responses to EC-dependent relaxing agents including bradykinin and A23187 in human umbilical artery rings were significantly decreased in preeclampsia(p<0.01). Relaxation responses to EC-independent agents(SNP and SNAP) were also inhibited in umbilical artery rings acquired from preeclampsia patients(p<0.01). To test the change of endothelial cell function in preeclampsia without involvement of smooth muscle dysfunction, we used human umbilical artery and rabbit femoral artery as a donor and detector, respectively, in bioassay experiment. Relaxation responses to EC-dependent agents(A23187 and bradykinin) showed similar results to conventional tension measurement (p<0.01). Relaxation responses to 8-bromo-cGMP in human umbilical artery rings were also significantly decreased in preeclampsia(p<0.01). CONCLUSIONS: It can be concluded that increased vascular resistance in preeclampsia is not only due to the disturbance of endothelial function, but also to smooth muscle dysfunction.
Biological Assay
;
Bradykinin
;
Calcimycin
;
Endothelial Cells
;
Femoral Artery
;
Humans
;
Muscle, Smooth
;
Myocytes, Smooth Muscle
;
Pre-Eclampsia*
;
Relaxation*
;
Tissue Donors
;
Umbilical Arteries*
;
Vascular Resistance
9.A Case of Segmental Neurofibromatosis.
Gwang Seong CHOI ; Jeung LEE ; Duck Hwan WON ; Sang Wahn KOO ; Joo Heung LEE ; Young Keun KIM
Annals of Dermatology 1999;11(2):109-111
Segmental neurofibromatosis is a rare disorder characterized by cafe-au-lait spots and neurofibrobmas, or only neurofibroma, limited to one region of the body. Disease-associated systemic involvement is uncommon. Most patients with segmental neurofibromatosis do not have a family history of neurofibromatosis. In Korea, there have been 3 reported cases of segmental neurofibromatosis. None of them had caf6-au-fait spots, systemic involvement, or family history. This report describes a case of segmental neurofibromatosis in a 25-year-old woman who had Becker's nevus-like cafe-au-lait spots and this was linked to the presence of Fanconi's syndrome in a second degree relative of the patient.
Adult
;
Cafe-au-Lait Spots
;
Female
;
Humans
;
Korea
;
Neurofibroma
;
Neurofibromatoses*
;
Neurofibromatosis 1
10.Third Ventricular Chordoid Glioma: Case Report.
Sung Nam HWANG ; Seung Won PARK ; Young Baeg KIM ; Duck Young CHOI ; Mi Kyung KIM ; Shin Kwang KHANG
Journal of Korean Neurosurgical Society 2000;29(8):1103-1106
No abstract available.
Glioma*