We tried to evaluate frequencies and severities of malocclusion of various socioeconomic areas according to growth and development. To obtain objective validity, we used Handicapping Labiolingual Deviation (HLD) suggested by Draker, Treatment Priority Index (TPI) by Grainger, Handicapped Malocclusion Assessing Record (HMAR) by American Dental Association and American Association of Orthodontist. Seoul and Kwangju were selected as an urban group, Ahnyang as an middle socioeconomic group and Hwasun near the Kwangju area as an rural group. 140 (male 63, female 73) of 5th grade in 'E' elementary school students in Seoul, 202 (male 101, female 101) of 'S' elementary school students in Kwangju, 207(male 105, female 102) of 'H' elementary school students in Hwasun, and 100(male 49, female 51) of 'M' elementary school students of in Ahnyang of all the same grade were analyzed and we obtained the results as follows; 1. TPI, HLD, and HMAR showed high coincidence and reproducibility between different observer. (p<0.01) 2. In comparison of TPI, HLD, and HMAR according to clinical decision, there was statistically difference between each other. (p<0.01) 3. As the severity of malocclusion increases there was high correlation between TPI and HLD, and between HLD and HMAR (p<0.05) 4. With respect to differences between areas in TPI and HLD, there was statistically difference between Ahnyang and other areas. 5. In Seoul as an urban group there was a high incidence of periodic checkup and history of orthodontic treatment than other area. 6. Mode of feeding and posture during sleeping did not affect the severity of malocclusion. As a conclusion, TPI, HLD and HMAR are so reproducible and coincident that they can be used as a guide on evaluating the frequency and severity of malocclusion and determining the priority of orthodontic treatment to determine the need and supply of orthodontic treatment. Furthermore these indices can provide objectively valid data for establishing public health problem solution.
American Dental Association ; Disabled Persons ; Female ; Growth and Development ; Gwangju ; Humans ; Incidence ; Malocclusion* ; Posture ; Public Health ; Seoul

No abstract available.
Epithelium* ; Humans* ; Insulin*

No abstract available.

In evaluating the early state of shock patients and their response to treatment, generally vital signs or additional hemodynamic values were used. Vital signs are easily obtained and repetitious values or continous monitoring is possible, whereas it cannot evaluate the patient's status properly nor is it a good prognostic factor. Meanwhile, additional hemodynamic values are obtained from pulmonary artery catheterization. But this procedure is difficult to proceed in the emergency room. Since central venous oxygen saturation has the advantage of being easily obtained and acts as a good prognostic factor for shock patients, we intended to prove its efficacy. From 1997 May to October, 50 patients admitted to Yonsei University Young Dong Severance Hospital in shock state, with systolic blood pressure below 90mmHg, were evaluated. Central venous catheter was inserted to obtain central venous oxygen saturation, serum lactate, base excess value, and its' initial value compared with the prognosis. The central venous oxygen saturation and base excess were low, while serum lactate value was high in the nonsurvival group. And in ROC(relative operating characteristic) curve, the AUC(area under curve) of central venous oxygen saturation was larger than the others. In comparing the MOF(multi-organ failure) group with the non-MOF group, the MOF group had a lower central venous oxygen saturation and base excess, and a higher serum lactate level, whereas in ROC curve, the AUC of base excess was larger than the others. Therefore, in estimating the prognosis of shock patients, the early central venous oxygen saturation proved to be a good prognostic factor.
Area Under Curve ; Blood Pressure ; Catheterization, Swan-Ganz ; Central Venous Catheters ; Emergency Service, Hospital ; Hemodynamics ; Humans ; Lactic Acid ; Oxygen* ; Prognosis ; ROC Curve ; Shock* ; Vital Signs

No abstract available.
Female ; Humans ; Pregnancy ; Pregnancy, Tubal*

No abstract available.
Female ; Humans ; Pregnancy ; Pregnancy, Tubal*

OBJECTIVES: The aim of this study was to determine the effect of breathhold diving on female diver's bone mineral density (BMD). METHODS: A cross-sectional observational study was carried out utilizing a health checkup of divers and controls at a hospital in Jeju city, Korea. Female divers (n=61) were matched with non-diver controls (n=61) by age, weight and postmenopausal year. BMD of the proximal femur(femoral neck, trochanter and Ward's triangle) was assessed by dual-energy X-ray absorptiometry (DEXA). RESULTS: The average diving duration of the female divers was 34+/-13 years. The BMD of the divers was higher than that of the controls in the femur neck and trochanter (p<0.05). On correlations analysis, the status of menopause, age, body weight and age at menarche were significantly correlated with proximal femur BMD in the divers (p<0.05). On multiple regression analysis, age and body weight were predictors of proximal femur BMD in the divers. On linear regression analysis of proximal femur BMD according to age in the divers and controls, regression coefficients of the divers were lower in all 3 areas of the proximal femur than the controls. CONCLUSIONS: BMD of the divers was higher than that of the controls in the femur neck and trochanter. There was a tendency for BMD of the divers to decrease faster than that of the controls with increasing age.
Absorptiometry, Photon ; Body Weight ; Bone Density* ; Diving* ; Female ; Femur ; Femur Neck ; Fisheries* ; Humans ; Korea ; Linear Models ; Menarche ; Menopause ; Neck ; Observational Study

PURPOSE: We studied enhanced method to view the vessels in the brain using Magnetic Resonance Angiography (MRA). Noticing that Maximum Intensity Projection (MIP) image is often used to evaluate the arteries of the neck and brain, we propose a new method for view brain vessels to stereo image in 3D space with more superior and more correct compared with conventional method. MATERIALS AND METHODS: We use 3T Siemens Tim Trio MRI scanner with 4 channel head coil and get a 3D MRA brain data by fixing volunteers head and radiating Phase Contrast pulse sequence. MRA brain data is 3D rotated according to the view angle of each eyes. Optimal view angle (projection angle) is determined by the distance between eye and center of the data. Newly acquired MRA data are projected along with the projection line and display only the highest values. Each left and right view MIP image is integrated through anaglyph imaging method and optimal stereoscopic MIP image is acquired. RESULTS: Result image shows that proposed method let enable to view MIP image at any direction of MRA data that is impossible to the conventional method. Moreover, considering disparity and distance from viewer to center of MRA data at spherical coordinates, we can get more realistic stereo image. In conclusion, we can get optimal stereoscopic images according to the position that viewers want to see and distance between viewer and MRA data. CONCLUSION: Proposed method overcome problems of conventional method that shows only specific projected image (z-axis projection) and give optimal depth information by converting mono MIP image to stereoscopic image considering viewers position. And can display any view of MRA data at spherical coordinates. If the optimization algorithm and parallel processing is applied, it may give useful medical information for diagnosis and treatment planning in real-time.
Angiography ; Arteries ; Brain ; Eye ; Head ; Linear Energy Transfer ; Magnetic Resonance Angiography ; Neck

PURPOSE: To evaluate the role of the MRI after the stereotactic radiofrequency ventralis intermedius nucleus (VIM) thalamotomy for the treatment of tremor. MATERIALS AND METHODS: 156 cases of the postthalamotomy MR findings were analized retrospectively. The sagittal T1 weighted image(WI), axial and coronal Proton and T2WI were obtained by using 0.38 T(Resonex Sunnyvale, U. S. A) machine. The interval between thalamotomy and MR examination was from 3 days to 2 months. The MR characteristics and complications related to thalamotomy were reviewed. In 16 cases, a follow-up MR was done 3 to 13 months after the initial MR study. We also reviewed the follow-up MR findings. RESULTS: The mean size of the thalamus lesion was 16 mm. The thalamus lesions were noted as a single layer in 23 cases and as layers of different signal intensity in 100 cases;(2 layers in 84 cases, and 3 or more layers in 16 cases). In 74 cases of the 84 cases with 2 layers, the inner layer was isointense with gray matter on T1WI, hypointense on T2WI, and the outer layer was hypointense on T1WI, hyperintense on T2WI. There were extrathalamic lesions that were related to mistargetting of stereotactic radiofrequency. The locations of the extrathalamic lesions were the posterior limb of the internal capsule(119 cases), the posterior limb of the internal capsule and the midbrain(39 cases), the posterior limb of the internal capsule and the basal ganglia(11 cases), and the midbrain(9 cases). In 5 cases of the mistargetting, double radiofrequency lesions were visualized because of the repeated coagulation. The other complications were intracerebral hemorrhage(2 cases), subdural hemorrhage(2 cases), epidural hemorrhage(1 case), and intraventricular hemorrhage(1 case). On the follow up MR studies(16 cases), 2 cases showed the hemosiderin deposition in periphery of the lesion. CONCLUSION: The MRI was useful for the evaluation of the thalamic lesions and complications after the stereotactic radiofrequency VIM-thalamotomy for the treatment of tremor.
Extremities ; Follow-Up Studies ; Hemosiderin ; Internal Capsule ; Magnetic Resonance Imaging ; Protons ; Retrospective Studies ; Thalamus ; Tremor

Intraabdominal abscess usually causes distress with fever, leukocytosis, pain and toxicity. Diagnosis of intraabdominal abscess is occasionally difficult and it has high morbidity. However radiologic method, such as ultrasonography, CT scan, or RI scan are helpful to early detection of intraabdominal abscess. Among these methods, ultrasonography is a noninvasive technique and performed without discomfort to patient. And also differential diagnosis between cystic and solid lesion is very easy and sequential ultrasonography in same patient is valuable for the evaluation of treatment effect. We analyzed the ultrasonic features of 48 cases with intraabdominal abscesses and the results are as follows; 1. In total 48 cases, the intraabdominal abscesses were 30 cases, the retroperitoneal abscesses, 5 cases, and the visceral abscesses, 13 cases. 2. The causes of the intraabdominal abscesses were perforating appendicitis (25 cases), postoperative complications (5 cases), pyogenic and amebic hepatic abscesses (13 cases), and the other (5 cases). 3. Round or oval shaped lesions were 26 cases (54%), irregular shape, 18 cases (38%), and multiple abscess formation in 4 cases (8%). 4. The size of the lesions were between 5 and 10cm in diameter in 54% of total 48 cases, and the most frequent feature of the echo pattern of the lesions was cystic with or without internal echogenicity (69%).
Abdominal Abscess* ; Abscess ; Appendicitis ; Diagnosis ; Diagnosis, Differential ; Fever ; Humans ; Leukocytosis ; Liver Abscess ; Methods ; Postoperative Complications ; Tomography, X-Ray Computed ; Ultrasonics ; Ultrasonography