It is widely blieved that the new bone formation is provoked by fine electrical stress to bone. There have been maay experimental studies that showed much efforts to define these small amounts of electricity, and these fine electricities are being used in the orthopedic field for the treatment of various fractures, nonunions and pseudsrthrosia The auther has checked the electrical potentials changing in the course of fractvre hesling in rabbits femur. Comparing these data with that of the normal control group, the following results were obtained. 1. In the normal rabbit's femur the electrical potentisl was 13.6mV less on the concave side than on the convex side. This finding can be explained by the existence of stress generated potential or piexoelectricity. 2. Electrcal potentials on the fractured femoral sites were lowered significantly from that of the control group. So auther could confirm the existence of bioelectrical generated by increased electrical activity of the living bone. 3. The electrical potential of the fractured femoral site has been decreased 50% and 20% as low as that of the normal site at 8 weeks respectively. It is expected that these lowered electrical potentials may become dose to the normal values when the changed metabolic process due to the fractured bone is no longer functioning and it is believed to take human 2 years to get the normal value.
Electricity ; Femur ; Fracture Healing ; Humans ; Metabolism ; Orthopedics ; Osteogenesis ; Rabbits ; Reference Values

No abstract available.

Morphological changes of the kidney after ESWL in 130 patients are analyzed with CT at Dept. of Urology, Chung-Ang University Hospital from March 1987 to May 1987. Of 130 patients, 9 patients(6.9%) showed renal hematoma. Among 9 patients, 5 patients (3.8%) had subcapsular hematoma and 4 patients(3.1%) had parenchymal hematoma. We analyzed these 9 patients radiologically and clinically. These hematoma were clinically insignificant and self-limited in all cases. So ESWL can be regarded as a safe modality for treatment of the renal and ureteral calculi.
Hematoma* ; Humans ; Kidney ; Shock* ; Ureteral Calculi ; Urology

Diffuse telangiectatic type of pulmonary arteriovenous malformation (AVM) is an uncommon disease entity in which numerous small arteriovenous connections occur throughout the lungs. It has rarely been confirmed by pulmonary angiography. We report a case of diffuse telangiectatic pulmonary AVM occurring in a patient with dyspnea and confirmed by CT using the slab maximum intensity projection (MIP) technique and conventional direct pulmonary angiography.
Angiography ; Arteriovenous Malformations* ; Dyspnea ; Humans ; Lung ; Tomography, X-Ray Computed*

Although many improvements have been made in surgical technique, as well as preoperative and postoperative care, the pancreaticoduodenectomy remains a technically difficult procedure attended by relatively high morbidity and mortality rates. This study concerns a total of 43 patients that underwent a pancreaticojejunostomy using a polyethylene stent by the Dunking method in a pancreaticoduodenectomy at Soon Chun Hyang University Hospital from January 1990 to December 1996. The results obtained are as follows:1) In our study, there were 13 patients with pancreatic head cancer, 11 patients with ampulla of Vater cancer, 5 patients with distal common bile duct cancer, 4 patients with duodenal cancer, 3 patients with chronic pancreatitis, 3 patients with trauma, 3 patients with a choledochal cyst, 1 patient with stomach cancer. 2) There were 23 men (53.5%) and 20 women (46.5%). 3) Postoperative complications developed in 25 patients (58.1%). Of the complications, bleeding was the most commonly observed, after which, in order of frequency, wound infection, leakage at the anastomotic site, intestinal obstruction, and intraabdominal abscess were also observed. 4) The overall operative mortality was 13.9% (excluding emergency cases, mortality was 7.5 %). Four patients died of intraabdominal or gastrointestinal bleeding, one patient died of pancreatic leakage, and one of hepatic failure. 5) Transfusion during the operation (above 5 pints) was significantly correlated with operative morbidity. Preoperative percutaneous transhepatic biliary drainage (PTBD) with serum bilirubin greater than 10 mg/dl significantly decreased the operative morbidity. 6) A prothrombin time more than 13.9 second, serum albumin less than 3.0 g/dl, and an emergency operation were significantly correlated with operative mortality.
Abscess ; Ampulla of Vater ; Bilirubin ; Choledochal Cyst ; Common Bile Duct ; Drainage ; Duodenal Neoplasms ; Emergencies ; Female ; Head and Neck Neoplasms ; Hemorrhage ; Humans ; Intestinal Obstruction ; Liver Failure ; Male ; Mortality* ; Pancreaticoduodenectomy* ; Pancreaticojejunostomy* ; Pancreatitis, Chronic ; Polyethylene ; Postoperative Care ; Postoperative Complications ; Prothrombin Time ; Serum Albumin ; Stents* ; Stomach Neoplasms ; Wound Infection

Most osteosarcomas arise spontaneously, but rarely they may be secondary to other benign osseous conditions and may occur following irradiation. Postradiation sarcoma of bone is approximately 5.5 percent of all osteogenic sarcoma. Diagnosis is possible when a sarcoma arising after long latent period(more than 3 years) in irradiated bone and the bone is normal or benign osseous lesion at the time of irradiation. The spontaneously arising osteogenic sarcomas are distribute mainly in the knee region, but postradiation sarcoma arise in any bones, such as long bone of the extremity, pelvic bone, vertebra, craniofacial bone and shoulder girdle bone. Recently we experienced a case of postradiation osteosarcoma of the pelvic bone who received radiation therapy for carcinoma of the uterine cervix 20 years ago.
Cervix Uteri ; Diagnosis ; Extremities ; Female ; Knee ; Osteosarcoma* ; Pelvic Bones* ; Sarcoma ; Shoulder ; Spine

The pathogenesis of thrombocytopenia in the gestational thrombocytopenia is not understood.This syndrome may represent either the de novo development of ITP or an accelerationof the physiologic pattern of increased platelet destruction that occurs during gestation. Thisdisorder is not easily distinguishable from classical ITP. However, the recognition and diagnosisof this syndrome is important because infants born to individuals with gestational thrombocytopeniaappear to have a markedly reduced risk of developing thrombocytopenia when comparedto infants born to patients with a history of ITP antedating pregnancy. We represent a caseof delivery in severe gestational thrombocytopenia with brief review of the literature.
Blood Platelets ; Humans ; Infant ; Pregnancy ; Thrombocytopenia*

Unlike the small cell carcinoma of the lung, much remains to be discovered about the natural history and of optimal therapy of primary small cell carcinoma of the pancreas. We experienced a case of a primary small cell carcinoma of pancreas with both adrenal metastasis. The patient was a seventy-year old woman who had complained of right upper quadrant abdominal pain for 1 month. Chest x-ray revealed no abnormality. Abdominal CT scan showed a non-enhancing low density mass in uncinate process of pancreas, retropancreatic lymphadenopathy and well defined masses in both adrenal gland. CT-guided biopsy of pancreas showed small cell carcinoma. Herein, we report a case of primary small cell carcinoma of the pancreas with both adrenal metastasis and review the literature.
Abdominal Pain ; Adrenal Glands ; Biopsy ; Carcinoma, Small Cell* ; Female ; Humans ; Lung ; Lymphatic Diseases ; Natural History ; Neoplasm Metastasis ; Pancreas* ; Thorax ; Tomography, X-Ray Computed

OBJECTIVES: This study was done to evaluate present status of child and adolescent psychiatric practice in the view of medical consumers. Help seeking behaviour process after recognizing their children's problem, satisfaction with psychiatric service, and difficult problems during practice were evaluated, and variable factors affecting them were analysed. METHODS: Through 10 multi-center point epidemiologic survey, 540 parents and their psychiatrists were involved in this study by structured questionnaire. RESULTS: Above 70% of subjects reported positive response to psychiatric service. The barrier to psychiatric service were different by subjects' age. In children, parents' inability to identify severity of children's problem and proper management place were major reason. However in adolescent, children's lack of desire to receive help and parents' worry about stigma related to receiving help were major barrier to psychiatric service. CONCLUSION: These findings suggest the importance of interagency collaboration and education services. Researchers and policymakers should consider strategies to reduce barrier related to perceptions of mental health problems and services, especially in adolescents.
Adolescent ; Child ; Cooperative Behavior ; Education ; Epidemiologic Studies* ; Humans ; Mental Health ; Parents ; Psychiatry ; Surveys and Questionnaires

PURPOSE: To evaluate accuracy of magnetic resonance(MR) imaging for staging of lung cancer and to compare the accuracies of CT and MRI. MATERIALS AND METHODS: We retrospectively analyzed 25 cases of lung cancer, which were confirmed surgically and pathologically. Five experienced radiologists participated in the receiver operating characteristic (ROC) analysis to evaluate and compare accuracies of the CT and MR imaging in preoperative staging of non small cell lung cancer by assessing tumor invasion of bronchus, mediastinum, chest wall, and hilar or mediastinal lymph node metastasis. Imaging results were evaluated against "truth" data based on both surgery and pathologic examination. RESULTS: Sensitivity of CT in distinguishing T3-T4 tumors was 60% ;specificity was 76%. These values for MR imaging were not significantly different(53% and 72%). With ROC analysis, no difference existed between accuracies of CT and MR imaging in diagnosis of bronchial involvement, but MR imaging was significantly more accurate than CT(p<0.05) in diagnosis of mediastinal invasion. There was no significant difference between accuracies of CT and MR imaging in detecting mediastinal node metastasis(N2 or N3); sensitivities were 64% and 78%, respectively, and specificities were 64% and 66%. CONCLUSION: There was no significant difference in accuracies of CT and MR imaging in preoperative tumor classification and assessment of mediastinal node metastasis, but MR imaging was more accurate than CT in assessment of mediastinal invasion.
Bronchi ; Carcinoma, Bronchogenic* ; Classification ; Diagnosis ; Lung Neoplasms ; Lymph Nodes ; Magnetic Resonance Imaging* ; Mediastinum ; Neoplasm Metastasis ; Retrospective Studies ; ROC Curve ; Sensitivity and Specificity ; Small Cell Lung Carcinoma ; Thoracic Wall