No abstract available.
Electrocardiography, Ambulatory*

BACKGROUND: Recent ad vances and innovation in laser technology encourages us to learn and use it experimentally and clinically. The pulsed dye laser(Candela SPTL-1) is a flashlamp excited dye laser, using the princ ples of selective photothermolysis that targets the abnormal microvascu lature of cutaneous lesions while sparing adjacent structures including the epidermis. The laseemits a 585nm wavelength, and has a pulse duration of 450 usec. It is now being widely used in the treatment of vascular diseases in the dermatology field. OBJECTIVE & METHOD : Buring the period of about 3 years from August 1994 to March 1992, at the out patient clinin of Department of Dermatology of Yonsei University. 252 patients who were treated with SPTL was analyzed to evaluate the clinical effects of the pulsed dye laser. Patient di@st.ributition f the cutaneous vascular lesions included 1fil pat.ients with nevui flammeus, 68 with telangcetasia, 15 with spider angima, 5 with strawberry hemangiona and 2 with cavernous hemangior ia. RESULTS: The results and summarized as follows : 1. Nevus flammeus 4b.7% of early childhood, 41.5% of late childhood and 47.3% of adults showed excellent or good results. 2. Telangiectasia 78.1% of patients she wed excellent or good results. 3. Spider angioma 66.7% of patients she wed excellent or good results. 4. Strawberry hemangioma and cavernous hemangioma Most, of the patients,howed fair or poor results. 5. Complications included hyperpigmentation(26.5%), hypopigmentation(1.6%) and atrophic scar(4.5% ). CONCLUSION: Our experince with pulsed dye laser during the last 3 years revealed that it was superior in treating vascular disease than other existing lasers.
Adult ; Dermatology ; Epidermis ; Fragaria ; Hemangioma ; Hemangioma, Cavernous ; Humans ; Lasers, Dye* ; Port-Wine Stain ; Spiders ; Telangiectasis ; Vascular Diseases

No abstract available.
Animals ; Histamine* ; Hydroxyzine* ; Rats* ; Urinary Bladder*

No abstract available.
Aspergillosis*

Discoid meniscus in the knee joint is common. From July 1990 through June 1994, the authors performed arthroscopy on 968 symptomatic knee joints. One hundred and six knees of 102 patients had discoid meniscus. Of the 106 knees, 14(13.2%) cases were associated with other intraarticular anatomic variants. There were 7(6.6%) cases with anomalous insertion of the anterior horn of the medial meniscus into the anterior cruciate ligament, and 7(6.6%) cases with anterior transposition of the insertion of the anterior cruciate ligament below the anterior tibial margin like the insertion of the posterior cruciate ligament. Of the 14 patients, the discoid meniscus were reshaped in 11 knees, partially resected in 2 knees, and one patient was treated with repair of a peripheral tear and reshaping. But had no treatment in associated intraarticular anatomic variants. The follow up was done from 24 to 54 months(average 37 months) after surgery. The results were excellent in 8 knees ; good in 4 knees and fair in 2 knees(Ikeuchi scale, 1982) The patients with excellent or good results were satisfied as were the authors, and these anatomical variants other than the discoid meniscus were not related to the patient's symptoms.
Animals ; Anterior Cruciate Ligament ; Arthroscopy ; Follow-Up Studies ; Horns ; Humans ; Knee ; Knee Joint ; Menisci, Tibial ; Posterior Cruciate Ligament ; Tears

Embryos of most mammalian species grown in vitro would undergo developmental arrest at the approximate time of genomic activation. Stage-specific cell block and the resulting rapid loss of embryo viability in conventional culture media have limited the duration for which embryos may be cultured prior to transfer. As a result, embryos are usually transferred to the uterus at the 4-to 8-cell stage to avoid the loss of viability associated with long-term in vitro culture. Early transfer has led to asynchrony of the endometrium-trophectoderm interaction at the time of implantation and a resultant reduction in the rate of implantation. To overcome these problems, a variety of co-culture systems has been devised in which embryos can develop for a longer period prior to embryo transfer. Vero cells, derived from African green monkey kidney, share a common embryologic origin with cells from the genital tract. In addition, they are potentially safe to use, since they are highly controlled for viruses and other contaminants. Therefore, co-culture using Vero cells has been widely utilized to enhance embryo viability and development, although not without controversies. We thus designed a series of experiments to demonstrate whether Vero cells do indeed enhance mouse embryo development as well as to compare the efficacy of co-culturing mouse 1-cell embryos on Vero cell monolayer in both Ham's F-10 and human tubal fluid (HTF) culture media. 1-cell stage ICR mouse embryos were cultured either in the presence of Vero cells (Group A) or in conventional culture medium alone (Group B). In Ham's F-10 significantly more 3-to-8cell embryos developed in group A than group B (59.8 versus 10.0%; F<0.01). In contrast, there was no significant difference in embryonic development both group A and group B in HTF. However, significant differences were noted only in later embryonic stage (13 and 0%; p<0.05 of group A and B respectively, hatching or hatched). In Ham's F-10, we also could observe the beneficial effect of Vero cell on hatching process (70.7 and 42.1%; p<0.05 of group A and group B respectively).
Animals ; Cercopithecus aethiops ; Coculture Techniques* ; Culture Media ; Embryo Transfer ; Embryonic Development* ; Embryonic Structures* ; Female ; Humans ; Kidney ; Mice* ; Mice, Inbred ICR ; Pregnancy ; Uterus ; Vero Cells*

STATEMENT OF PROBLEM: Recently, in attempts to reinforce the acrylic resin and to reduce the polymerization shrinkage, it has been reported that adding vinyloligo-silsesquioxane (vinyl-POSS) to PMMA significantly compensates for polymerization shrinkage and somewhat increases the fracture resistance. PURPOSE: There haven't been any studies on abrasion that can affect the adaptation of the denture in long-term use. In this study, abrasion resistance was compared between acrylic resin with vinyl-POSS and commercialized acrylic resin for denture base. In addition, the difference in abrasion resistance according to molding methods was compared. Material and method : Using PaladentR 20 including vinyl-POSS, PaladentR 20, Lucitone 199R, SR IvocapR, denture bases were fabricated using compression molding technique and continuous-pressure injection technique. Surface hardness and abrasion were measured for each group, and the worn surfaces were observed under a scanning electron microscope. RESULTS: 1. When surface hardness was measured for each material and molding technique, there was no statistically significant difference among the materials. (p<0.05) 2. When same denture base material and molding technique were used, the abrasion due to toothpaste solution was 5 times as severe as the abrasion due to soap solution. 3. When toothpaste solution was used, the abrasion decreased in the order of PaladentR 20, PaladentR 20 including vinyl-POSS, SR IvocapR, and Lucitone 199R. However, statistically significant difference was seen only among PaladentR 20, SR IvocapR, and Lucitone 199R.(p<0.05). 4. When soap solution was used, the abrasion was more severe in PaladentR 20 and including vinyl-POSS PaladentR 20 groups than in SR IvocapR and Lucitone 199R groups. (p<0.05). CONCLUSION: Addition of vinyl-POSS doesn't improve the abrasion resistance, and the abrasion resistance was similar to those of existing materials. Additional studies under different conditions are needed. For clinical application of vinyl-POSS, further investigations with different requirements and conditions are necessary.
Denture Bases* ; Dentures* ; Fungi ; Hardness ; Polymerization ; Polymers ; Polymethyl Methacrylate ; Soaps ; Toothpastes

We experienced a case of clipping of an intracranial aneurysm of a 63 year old male with a subarachnoid hemorrhage under general anesthesia. Preoperative electrocardiography showed complete Left Bundle Block (LBBB) without subjective symptoms. Among the intraventricular blocks, bundle branch block is the most common type and in particular, complete LBBB may progress to the more serious condition of complete heart block. Consideration of anesthetic management in such patients requires a knowledge of normal cardiac physiology, neurophysiology, the circulatory effects of various anesthetic agents and the pathophysiology of these diseases, to prevent any hypertension in response to intubation and surgery. We report upon the anesthetic management of a patient for clipping of an intracranial aneurysm with complete LBBB, which was performed successfully without complication.
Anesthesia, General ; Anesthetics ; Bundle-Branch Block* ; Electrocardiography ; Heart Block ; Humans ; Hypertension ; Intracranial Aneurysm* ; Intubation ; Male ; Middle Aged ; Neurophysiology ; Physiology ; Subarachnoid Hemorrhage

No abstract available.
Catheters*

PURPOSE: Cross-modality coregistration of positron emission tomography (PET) and magnetic resonance imaging (MR) could enhance the clinical information. In this study we propose a refined technique to improve the robustness of registration, and to implement more realistic visualization of the coregistered images. MATERIALS AND METHODS: Using the sinogram of PET emission scan, we extracted the robust head boundary and used boundary-enhanced PET to coregister PET with MR. The pixels having 10% of maximum pixel value were considered as the boundary of sinogram. Boundary pixel values were exchanged with maximum value of sinogram. One hundred eighty boundary points were extracted at intervals of about 2 degree using simple threshold method from each slice of MR images. Best affined transformation between the two point sets was performed using least square fitting which should minimize the sum of Euclidean distance between the point sets. We reduced calculation time using pre-defined distance map. Finally we developed an automatic coregistration program using this boundary detection and surface matching technique. We designed a new weighted normalization technique to display the coregistered PET and MR images simultaneously. RESULTS: Using our newly developed method, robust extraction of head boundary was possible and spatial regishation was successfully performed. Mean displacement error was less than 2.0mm. In visualization of coregistered images using weighted normalization method, structures shown in MR image could be realistically represented. CONCLUSION: Our refined technique could practically enhance the performance of automated three dimensional coregistration.
Brain* ; Head ; Magnetic Resonance Imaging ; Positron-Emission Tomography