Rupture of anterior communicating artery aneurysm is one of the most important casuses of subarachnoid hemorrhage. Subarachnoid hemorrhage due to ruptured anterior communicating artery aneurysm shows characteristic CT findings, such as forntal hematoma or septum pellucidum hematoma. In some patients with the ruptured aneurysm, direct carotid angiography may be needed. particularly when transfemoral approach is not possible. However, not much have been known about the puncture site selection between the two carotid arteries in relation to the location of hematoma in CT scans. To determine the ideal puncture site of the direct carotid angiography, seventy-five cases of anterior communicating artery aneurysm confirmed by operation from May 1988 to April 1992, were analyzed in terms of relationship between location of hematoma on CT, direction of aneurysm and A1 artery on angiograms. Frontal lobar hematoma was more prevalent than septal hematoma, and was more common on the right side. In cases of lobar hematoma, aneurysm was directed to the ipsilateral side of the hematoma (67%) and was most commonly fed by contralateral A1 artery(75%). Septal bematoma consisted 36% of the cases and among there, midline directed aneurysm was most common, frequently fed by left A1 artery. In conclusion, when performing direct carotid angiography in patients with anterior communicating artery aneurysm, if forntal hematoma is observed on CT, it may be beneficial to puncture contralateral carotid artery. Meanwhile, if hemorrhage of septum pellucidum is observed, it may be better to puncture left carotid artery.
Aneurysm ; Aneurysm, Ruptured* ; Angiography ; Arteries* ; Carotid Arteries ; Hematoma ; Hemorrhage ; Humans ; Intracranial Aneurysm ; Punctures ; Rupture ; Septum Pellucidum ; Subarachnoid Hemorrhage ; Tomography, X-Ray Computed

This study was carried out to determine the effect of long term administration of vitamin A on the changes of lipids in liver tissue and serum in rat. The animals were fed with control diet(200 ug/day) and high vitimin A diet(2, 000 ug/day) for 24 weeks. Vitamin A contents of liver in high vitamin A fed rats were increased linearly accordance with duration of the vitamin A administration, but levels of serum vitamin A showed unremarkable changes during the experimental period. Contents of cholesterol and triglycerides of vitarnin A fed rats were significantly higher than those of controls. Levels of HDL-triglycerides in v:itamin A fed rats were significantly higher than those of control rats during experimental period, while levels of HDL-cholesterol and HDL-phospholipids showed unremarkable changes during experimental period. Levels of individual cholesteryl esters showed undremarkable changes during experimental period in both animal groups.
Animals ; Cholesterol ; Cholesterol Esters ; Liver* ; Rats* ; Triglycerides ; Vitamin A* ; Vitamins*

The digital dust indicator (Sibata P-5), one of the direct-reading instruments was evaluated for the respirable dust in the underground coal mine environments. As a reference, respirable dust was determined using three cyclones and/or impactors. All the tests were performed on aerosol in twenty underground coal mines. The coefficients of mass-relative concentration were 0.067+/-0.054 (Mean+/-Standard deviation) (range: 0.006-0.172). The relationship between relative concentration and temperature was not significant statistically. Also, the relationship of relative concentration and relative humidity was not significant. Mass concentration and relative concentration were 5.31+/-5.22 mg/m3 and 162+/-163 CPM (Mean+/-Standard deviation) respectively. The range of mass concentration was 1.22-22.69 mg/m3; relative concentration 16-628 CPM. The relationship of mass concentration and relative concentration was not significant in these ranges.
Coal ; Cyclonic Storms ; Dust* ; Humans ; Humidity

No abstract available.
Female ; Humans ; Pregnancy ; Pregnancy Trimester, Second*

We have observed the dark effect of 8-methoxypsoralen (8-MOP) on the viability and DNA synthesis in human lymphocyte cultures after stimulation with phytohemagglutinin (PHA) in the absence of ultraviolet A radiation. The concentrations of 8-MOP was 0.5-3.2 microgram/ml. We have also measured the LDH activity in supernatants of lymphocyte cultures treated with 8-MOP. The results were as follows: 1. There was no 8-MOP dose-dependent decrease in the viability of lymphocytes up to 8MOP 32microgram/ml. 2. There was 8-MOP dose-dependent decrease in PHA-induced DNA synthesis of lymphocytes from the concentration of 8-MOP 2microgram/ml. 3. There was a time-dependent decrease in PHA-induced DNA synthesis of lymphocytes at the conscentration of 8-MOP 32microgram/ml. 4. There was no LDH release in supernatant of lymphocyte cultures after incubation with 8-MOP up to 8-MOP 32microgram/ml.
DNA* ; Humans* ; Lymphocytes* ; Methoxsalen*

We developed an animal model to recreate the condition of an open fracture in communication with the maxillary sinus. We then studied wound healing of the sinus wall structures following fracture in the presence of autogenous bone and alloplastic implant. This model is designed to simulate the repair of an orbital floor fracture in humans. The New Zealand White rabbit was used as the animal model. Standardized 8mm defects were made bilaterally in the maxillary sinuses to include bone and mucosa in 36 rabbits. Two different implants and autogenous calvarial bone graft were placed in the soft-tissue pockets to obturate the defects, exposing one surface of the implant to the open sinus. Medpor porous polyethylene, silicone and calvarial bone implant were compared. Animals were killed at 1, 2 and 8 weeks after implantation. Gross examination of the specimens for the amount of mucosal closure and implant tissue fixation was performed. Histological sections were evaluated for bone and soft-tissue morphology juxtaposed to the implant. Complete closure of the mucosal defect was demonstrated with each type of implant. Medpor implants showed both vascular and soft-tissue ingrowth into pores by week 1. Bone ingrowth was seen by week 2. Closure of the Medpor obturated defects occurred more rapidly than in the silicone group. The Medpor implants and calvarial bone demonstrated bone and soft-tissue fixation, callus formation and maturation, while mature overlying mucosa was reconstituted over the defects. Silicone implants demonstrated a fibrous tissue reaction within 1 week of implantation and they never became fixed to bone or soft tissue. Maxillary sinus wall regeneration occurred in all defects. This study supports clinical observations of maxillary sinus wall regeneration in humans.
Animals ; Bony Callus ; Fractures, Open ; Humans ; Maxillary Sinus ; Models, Animal ; Mucous Membrane ; New Zealand ; Orbit ; Polyethylene ; Rabbits ; Regeneration ; Silicones ; Tissue Fixation ; Transplants ; Wound Healing

A 28-year-old female devei,oped five rice-sized erythematous telaniectatic solid papules of her left side of cheek and numerous light brownish flat papules of her face two years before visiting our department of dermatology. Biopsy results of the erythematous papule vere dermal infiltration by well-differentiated, however, somewhat atypical and varying sized plasma cells involving epidermis, and the flat papule was that of verwca plana. Bone marrow aspirate was essentially normal. Primary cutaneous plasmacytoma is a rare disease. A significant proportion of patients with this ent on to develop systemic disease with a poor prognosis. Our patient was not treatead, bit only excised partially for biopsy. All skin lesions involuted two years later spontaneously and rema ns well until now six years later without recurring.
Adult ; Biopsy ; Bone Marrow ; Cheek ; Dermatology ; Epidermis ; Female ; Humans ; Plasma Cells ; Plasmacytoma* ; Prognosis ; Rare Diseases ; Skin

PURPOSE: To compare image quality of storage phosphor digital radiography(DR) with film-screen radiography in portable chest imaging, and to assess the minimum X-ray dose that can be applied to DR in adults without image degradation, and also to compare image qualities of low dose and standard dose DR. Materials and Methalos: A geometrical phantom similar to the human thorax was imaged by a portable radiographic unit with fixed kVp and variable m^s in both film-screen and DR systems. Three radiologists scored the images by four grades in four categories of 1) contrast between mediastinum and lung, 2) definition of the nodule in the lung, 3) definition of another nodule through the mediastinal shadow, and 4) grainess(noise : assessed only in DR). Additionally, portable chest images were obtained in 10 patients in a intensive care unit by film-screen, standard dose and half dose DR in consecutive days. The same readers scored the images by four grades in six categories of 1) the lungs and hila, 2) the mediastinum, 3) subphrenic area. 4) musculoskeletal shadow, 5) tubes and lines, and 6) grainess (only in DR). The images with superior quality were assessed by paired t-test. RESULTS: In phantom study, the minimum dose of digital images scored 3 or more by all readers was 39% of the standard dose. In patient study, DR was superior to film-screen radiography in all categories except tube and line. Low dose DR was not inferior to standard dose DR in five categories other than grainess to two readers or more. CONCLUSION: In portable chest imaging, storage phosphor DR image was superior to conventional film-screen radiography and half dose DR was comparable to standard dose DR despite of more noise.
Adult ; Humans ; Intensive Care Units ; Lung ; Mediastinum ; Noise ; Radiographic Image Enhancement* ; Radiography ; Thorax*

PURPOSE: To compare image quality of storage phosphor digital radiography(DR) with film-screen radiography in portable chest imaging, and to assess the minimum X-ray dose that can be applied to DR in adults without image degradation, and also to compare image qualities of low dose and standard dose DR. Materials and Methalos: A geometrical phantom similar to the human thorax was imaged by a portable radiographic unit with fixed kVp and variable m^s in both film-screen and DR systems. Three radiologists scored the images by four grades in four categories of 1) contrast between mediastinum and lung, 2) definition of the nodule in the lung, 3) definition of another nodule through the mediastinal shadow, and 4) grainess(noise : assessed only in DR). Additionally, portable chest images were obtained in 10 patients in a intensive care unit by film-screen, standard dose and half dose DR in consecutive days. The same readers scored the images by four grades in six categories of 1) the lungs and hila, 2) the mediastinum, 3) subphrenic area. 4) musculoskeletal shadow, 5) tubes and lines, and 6) grainess (only in DR). The images with superior quality were assessed by paired t-test. RESULTS: In phantom study, the minimum dose of digital images scored 3 or more by all readers was 39% of the standard dose. In patient study, DR was superior to film-screen radiography in all categories except tube and line. Low dose DR was not inferior to standard dose DR in five categories other than grainess to two readers or more. CONCLUSION: In portable chest imaging, storage phosphor DR image was superior to conventional film-screen radiography and half dose DR was comparable to standard dose DR despite of more noise.
Adult ; Humans ; Intensive Care Units ; Lung ; Mediastinum ; Noise ; Radiographic Image Enhancement* ; Radiography ; Thorax*

The authors underwent the serum lipid study, involving the lipoprotein fraction, and the HDL-cholesterol mean values in normal Korean adults visited to Hanyang University Hospital, and also compared with the previously reported serum lipid studies. The results are as follows; 1) The mean values of triglyceride, total cholesterol, and phospholipid were 103.3+/-17.1mg%, 188.9+/-18.2mg%, and 196.7+/-19.8mg%, respectively. 2) Compared with the past 7 years triglyceride showed increasing tendency with significance, and cholesterol and phospholipid showed slightly increasing tendency. 3) In the serum lipoprotein fraction, the mean values of alpha-lipoprotein, pre-beta-lipoprotein, and beta-lipoprotein were 37.2+/-5.9%, 16.0+/-4.2%, and 48.6+/-5.2%, respectively. 4) Compared with the past 10 years, the alpha-, and pre-beta-lipoprotein showed increasing tendency, meanwhile, beta-lipoprotein revealed decreasing tendency. 5) The mean value of HDL-cholesterol was 52.3+/-14.6mg%, and the ratio of HDL-cholesterol to total cholesterol(HDL-cholesterol/total cholesterol) was 28.2+/-7.9. 6) Compared with the past 2 years, HDL-cholesterol level showed slightly increasing tendency.
Adult ; Cholesterol ; Humans ; Lipoproteins ; Triglycerides