No abstract available.
Urachus*

In this study, the number of physicians presently living in Korea thoroughly estimated by several means and, on this bases, their productivity and level of supply were estimated. The results were as follows : First, the number of physicians who did not notify the Korea Medical Association in May 1987 were 10,110, including 4,093 emigrant physicians(40.5%), 861 military medical officers, 745 public health doctors, and 107 decreased physicians. A total of 1,330 physicians could not be identified by any effort. Second, among the 34,897 registered physicians as of May 1987, 29,933(85.8%) were residing in Korea, 4,115 physicians(11.8%) had emigrated to other countries, and 849 physicians(2.4%) were decreased. Practicing physicians defined as those in Korea who were not retired, serving in the military, or completing residencies or internships, comprised 78.6%(27,414 physicians) of the total number of registered physicians. Third, it is estimated that in the year 2000 the number of registered physicians, physicians residing in Korea, and practicing physician will be 75,040, 64,038 and 57,655, respectively and these are increases of 115.0%, 113,9%, and 110.3%, respectively, compared to 1987. Fourth, the population physician ratio will be 759 to one physician in the year 2000. Fifth, the productivity of physicians, as calculated by relative values defining the productivity of 35 to 44 year-old male physicians as 10, will increase 110.7% in the year 2000 compare to that of 1987, and this increment is almost the same level as that of physicians supply. From the results of the present analysis of physicians manpower and supply projection, it can be recognized that the development of a regular notification system is necessary in order to identify precisely the number of physicians. Also a policy a physician supply is essential in order to adjust in advance the number of physicians, otherwise there will be surplus to the medical demand.
Adult ; Efficiency ; Emigrants and Immigrants ; Humans ; Internship and Residency ; Korea* ; Male ; Military Personnel ; Public Health

To provide the information necessary for the insurance medicine management plan, price discount rates among the insurance medicines were studied. A total of 2,107 items of insurance medicine of which prices were discounted via government inspections of real transactional process of insurance medicine were analysed. The conclusions are as follows; 1. Among the variables relevant to the characteristics of manufacturers, price discount rates of insurance medicines were statistically significant with production rankings of manufacturers, incorporation year, existence of investments by foreign corporation, existence of a research institute, and enrollment in the exchange. And among the variables relevant to the properties of medicines, the number of enrolled items which have the same components, classification, the date of new enrollment, the sales of items, and the number of raw materials in the items were statistically significant. 2. Stepwide multiple regression was done to identify the factors which affect the price discount rates of insurance medicines. The number of enrolled items which have the same components, production rankings of manufactures, classification number (medicines for function of tissue cells), incorporation year (1940-1949), existence of investments by foreign corporations, classification number (anti-germ medicines), number of raw materials in the items, the sales of items, and medicines whose major objective is not treatment were significant variables and the R2-value for these variables was 21.2%. Considering all of the above results, for management of insurance medicines, it seems important that the real transactional prices of insurance medicines should be identified systematically, focusing on the properties which affect the price discount rates of insurance medicines.
Academies and Institutes ; Classification ; Commerce ; Insurance* ; Investments

BACKGROUND: Microglial cells, major immune effector cells in the central nervous system, become activated in neurodegenerative disorders. Activated microglial cells produce proinflammatory mediators such as nitric oxide (NO), tumor necrosis factor-alpha and interleukin-1beta(IL-1beta). These proinflammatory mediators have been shown to be significantly increased in the neurodegenerative disorders such as Alzhimer's disease and Pakinson's disease. It was known that one of the neurodegeneration source is stress and it is important to elucidate mechanisms of the stress response for understanding the stress-related disorders and developing improved treatments. Because one of the neuropeptide which plays a main role in regulating the stress response is corticotropin- releasing hormone (CRH), we analyzed the regulation of NO release by CRH in BV2 murine microglial cell as macrophage in the brain. METHODS: First, we tested the CRH receptor expression in the mRNA levels by RT-PCR. To test the regulation of NO release by CRH, cells were treated with CRH and then NO release was measured by Griess reagent assay. RESULTS: Our study demonstrated that CRH receptor 1 was expressed in BV2 murine microglial cells and CRH treatment enhanced NO production. Furthermore, additive effects of lipopolysaccaride (LPS) and CRH were confirmed in NO production time dependantly. CONCLUSION: Taken together, these data indicated that CRH is an important mediator to regulate NO release on microglial cells in the brain during stress.
Brain ; Central Nervous System ; Corticotropin-Releasing Hormone* ; Macrophages ; Neurodegenerative Diseases ; Neuropeptides ; Nitric Oxide* ; Receptors, Corticotropin-Releasing Hormone ; RNA, Messenger ; Tumor Necrosis Factor-alpha

PURPOSE: We reviewed the clinical and radiological outcomes of total hip arthroplasty and bipolar hemiarthroplasty for avascular necrosis of the femoral head. MATERIALS AND METHODS: From January 1986 to December 1989, 24 cases were treated with total hip arthroplasty and 27 cases with bipolar hemiarthroplasty for avascular necrosis of the femoral head. Clinical outcomes were assessed using Harris Hip Score. Serial radiographs of the hip were used to assess stability of the femoral component, change of the acetabular cup angle, osteolysis of acetabulum or femur, wear of polyliner and erosion of the acetabular cartilage. RESULTS: The average Harris Hip Score was 93.1 in bipolar hemiarthroplasty group and 86.8 in total hip arthroplasty group at last follow up. Femoral osteolysis was observed in 17 patients of 24 total hip arthroplasties and in 14 patients of 27 bipolar hemiarthroplasties. Acetabular osteolysis was observed in 8 cases of 24 total hip arthroplasties. Revision was undertaken 8 cases (33.3%) in the total hip arthroplasty group and 6 cases (22.2%) in the bipolar hemiarthroplasty group. The main causes of revision were wear of polyliner and severe osteolysis in the total hip arthroplasty group and erosion of the acetabular cartilage in the bipolar arthroplasty group. CONCLUSION: The main cause of failure after total hip arthroplasty for avascular necrosis of the femoral head was using a 32 mm femoral head and a polyliner less than 8mm thickness.
Acetabulum ; Arthroplasty* ; Arthroplasty, Replacement, Hip ; Cartilage ; Femur ; Follow-Up Studies ; Head* ; Hemiarthroplasty ; Hip* ; Humans ; Necrosis* ; Osteolysis

BACKGROUND: The purpose of this study is to evaluate the disease-free survival (DFS) and overall survival (OS) of patients with stage IIB osteosarcoma at a single institution for 20 years and to compare the results according to the chemotherapy protocols. METHODS: From Jan 1988 to Nov 2008, 167 patients with osteosarcoma were treated at our hospital and among them, 117 patients (67 males and 50 females) with stage IIB osteosarcoma were evaluable. Their mean age was 22.6 years (range, 8 months to 71 years). Seventy-eight cases underwent the modified T10 (M-T10) protocol (group 1), 23 cases underwent the T20 protocol (group 2) and 16 cases underwent the T12 protocol (group 3). The DFS and OS were calculated and compared according to the chemotherapy protocols. RESULTS: At a mean follow-up of 78.9 months, 63 patients were continuously disease-free (63/117), 6 patients were alive after having metastatic lesions, 7 patients died of other cause and 41 patients died of their disease. The 5- and 10-year OS rates were 60.2% and 44.8%, respectively and the 5- and 10-year DFS rates were 53.5% and 41.4%, respectively. There was no significant difference of the OS and DFS between the chemotherapy protocols (p = 0.692, p = 0.113). CONCLUSIONS: At present, we achieved success rates close to the internationally accepted DFS and OS. We were able to achieve the higher survival rates using the M-T10 protocol over the 20 years. However, there was no significant difference of results between the chemotherapy protocols. We think the M-T10 protocol will achieve more favorable results in the near future.
Adolescent ; Adult ; Aged ; Antineoplastic Combined Chemotherapy Protocols/administration & dosage/*therapeutic use ; Bleomycin/administration & dosage ; Bone Neoplasms/*drug therapy/*mortality/surgery ; Chemotherapy, Adjuvant ; Child ; Child, Preschool ; Cyclophosphamide/administration & dosage ; Dactinomycin/administration & dosage ; Disease-Free Survival ; Doxorubicin/administration & dosage ; Female ; Follow-Up Studies ; Humans ; Infant ; Kaplan-Meier Estimate ; Leucovorin/administration & dosage ; Male ; Methotrexate/administration & dosage ; Middle Aged ; Neoadjuvant Therapy ; Osteosarcoma/*drug therapy/*mortality/surgery ; Survival Rate ; Vincristine/administration & dosage ; Young Adult

Recurrent abortion has been defined as the occurrence of three or more clinically recognized pregnancy loss before 20 weeks and it occurs in 1% of women. The chromosomal abnormalities of abortuses have been suggested as the most common causes of recurrent abortion. We have studied the incidence of chromosomal abnormalities in 57 patients with recurrent abortion using the chorionic villi samples. Of the 57 abortuses analysed, 32 (56.1%) had chromosomal abnormalities. Trisomy was predominant (23 cases, 40.4%), followed by mosaicism 3 (5.2%), tetraploidy 2 (3.5%), monosomy 2 (3.5%), and structural anomaly 1 (1.8%). Trisomy for the chromosome 16 was most prevalent among trisomies. The incidence of trisomy was positively related to matemal age above 35 year-old. But there is not statistically significant. And there are no correlation between gestational age and chromosomal abnormalities. In conclusion, the incidence of chromosomal abnormalities of recurrent abortuses was 56.1% which was similar to that of the other reports. This means that the analysis of karyotype of chorionic villi, as the first test to investigate the cause of recurrent abortion, may be not useful, however, it will require further.
Abortion, Habitual ; Adult ; Chorion* ; Chorionic Villi Sampling ; Chorionic Villi* ; Chromosome Aberrations ; Chromosomes, Human, Pair 16 ; Female ; Gestational Age ; Humans ; Incidence ; Karyotype ; Monosomy ; Mosaicism ; Pregnancy ; Tetraploidy ; Trisomy

PURPOSE: We evaluated the complications of allograft reconstruction after a bone tumor resection, and reviewed literatures to overcome such complications. MATERIALS AND METHODS: We retrospectively reviewed clinical records and radiographs of fifteen patients in whom reconstruction with allograft after bone tumor resection. RESULTS: Eight patients were men and seven were women with a mean age of 27.1 years (1-56 years) and a mean follow-up period of 89.5 months (33-165 months). All postoperative complications related to the allograft were recorded. Twenty patients (80.0%) obtained a radiologic bony union at a mean of 8.35 months (4-12 months). The mean Musculoskeletal Tumor Society score was 73.5% (46.6-93.0%). Nine patients (60.0%) experienced one event and 3 (20.0%) patients experienced multiple events during the follow-up period. Recorded events were infection (3), fracture (2), nonunion (2), limb length discrepancy (2) and varus deformity (2). The mean event free survival period was 60.8 months (6-144 months). The mean allograft survival period was 80.2 months and the 5 year survival rate of the allografts was 83.0%. CONCLUSION: In order to overcome complications, the combination of an allograft and vascularized fibular graft is highly recommended. In the near future, the tissue engineering technique, the application of the stem cell and PRP, could reduce the complication of allograft such as resorption and nonunion.
Congenital Abnormalities ; Disease-Free Survival ; Extremities ; Female ; Follow-Up Studies ; Humans ; Male ; Postoperative Complications ; Retrospective Studies ; Stem Cells ; Survival Rate ; Tissue Engineering ; Transplantation, Homologous ; Transplants

Situs inversus totalis (SIT) is a rare condition in which the viscera are transposed in a mirror image reversal. We report two cases of laparoscopic cholecystectomy (LC) performed for SIT patients. A 63-year old male patient with SIT was diagnosed with symptomatic gallstones. We performed LC by 3-port method. The patient was discharged uneventfully on postoperative day 2. A 57-year old female patient with SIT underwent LC for acute cholecystitis. Due to severe inflammation an assistant was needed. The patient was discharged uneventfully on postoperative day 3. Over 80 cases of LCs in SIT patients have been reported so far and LC has become the standard treatment. The current report confirms the safety of laparoscopy in such cases. Laparoscopic cholecystectomy can be performed safely in SIT patients if care is taken. Surgeons need to be careful of reversed anatomy and unaccustomed working hand.
Cholecystectomy, Laparoscopic* ; Cholecystitis, Acute ; Female ; Gallstones ; Hand ; Humans ; Inflammation ; Laparoscopy ; Male ; Methods ; Situs Inversus* ; Surgeons ; Viscera

OBJECTIVE: To see whether there is a relationship between Korean Falls Efficacy Scale-International (KFES-I) developed for measuring fear of falling and frequency of fall. METHOD: KFES-I was composed with 16 items of activities of daily living including social activities and graded from 1 to 4 in each item. Surveys of 250 patients over 65 years of age from the public health center of Kang-dong and Seong-buk based on KFES-I and fall questionnaire such as presence, frequency and severity of fracture within last 6 months, and combined medical illness were taken. The data of KFES-I, fall questionnaire, and the inter-relationship of KFES-I items had been analyzed by Spearman and Kendall test. RESULTS: There was strong positive correlation between KFES-I total score and the frequency of falls. Four items (item 4, 7, 11, 15) of KFES-I showed strong correlation with the frequency of falls. There was significant difference in KFES-I total score between control and fracture groups (p<0.05). CONCLUSION: Our results showed that there was strong positive correlation between frequency of falls and KFES-I. It is suggested that frequency of falls can be predicted by KFES-I.
Activities of Daily Living ; Aged ; Humans ; Public Health ; Surveys and Questionnaires