No abstract available.
Enteritis* ; Megacolon, Toxic* ; Salmonella*

To investigate the effect of hyperoxia on EKG findings and to evaluate the applicability of EKG as noninvasive monitoring index of oxygen toxicity, 38 rabbits were continuously exposed to 6 different conditions-3 hyperbaric oxygenations (HBO-2.5, 3.5 and 5ATA, 100% O2), normobaric oxygenation (NBO, 100% O2), hyperbaric aeration (HBA-5ATA, 21% O2) and normobaric aeration (NBA, 21% O2)-for 120 minutes and their EKG and time to dyspnea and convulsion were recorded. Dyspnea and death were observed in exposure conditions of HBO-3.5 and HBO-5 (Positive rate of dyspnea; 10%, 100%, death; 10%, 25%, respectively) only, and convulsion in 4 oxygenation groups (NBO; 20%, HBO-2.5; 20%, HBO-3.5; 20%, HBO-5; 88%). Abnormal EKG findings included arrhythmia and ST-T changes and the incidences was increasing with doses(partial pressure of oxygen). In addition to EKG change, findings observed during exosure were dyspnea and convulsion in the order of appearence and when non specific ST-T change was accepted as positive (abnormal) finding, the frequency of abnormal EKG was statistically significant(p<0.01), but when it was excluded from positive results, the frequency of EKG change was not significant(p>0.05). These results suggest that the effect of hyperoxia on heart is myocardial ischemia and arrhythmia, that oxygenation more than 3.5ATA causes myocardial damage in 120 minutes exposure, and that EKG is valuable as monitoring index of oxygen toxicity.
Arrhythmias, Cardiac ; Dyspnea ; Electrocardiography* ; Heart ; Hyperbaric Oxygenation ; Hyperoxia* ; Incidence ; Myocardial Ischemia ; Oxygen ; Rabbits* ; Seizures

No abstract available.
Electrocardiography* ; Hyperbaric Oxygenation*

This study was performed to investigate the factors related to tooth wear. For this study, 78 patients with temporomandibular disorders and 76 dental students without any signs and symptoms of temporomandibular disorders were selected as the patients group and as the normal group, respectively. Preferred chewing side, Angle's classification, lateral guidance pattern, head and shoulder posture wee observed clinically. Electromyographic activity of anterior temporalis and masseter muscle were recorded with BioEMG and occlusal status were recorded with T-Scan . Wear facet area of each tooth was measured from working model of upper arch corresponding to the occlusal status from T-Scan, Wear facet area were measured with planimeter in mm2. Total area were divided into incisal, canine, posterior tooth area. Anterior wearfacet area was incisor area plus canine area, and unilateral area was anterior area plus posterior area. The data collected were analyzed by SAS statistical program and the results of this study were as follows: 1. There was no significant difference between the two groups in total werafacet area, and male subjects showed tendency to have larger area in the normal group but female subjects showed tendency vice versa. 2. There was no significant difference related to preferred chewing side and Angle's classification, however, some difference was observed by lateral guidance pattern. Anterior wear facet area in subjects of canine guidance was the largest in the three subgroups. 3. Subjects with head tilting to right side had larger posterior and total area, and subjects with higher shoulder in right side had larger canine and anterior area than any other subgrous. 4. Electromyographic activity of masseter muscle was more correlated with wear facet area than anterior temporalis muscle, and tooth contact number and force were significantly correlated with wear facet area, but the most important factor affecting tooth attrition was age.
Dental Occlusion ; Female ; Head ; Humans ; Incisor ; Male ; Malocclusion ; Masseter Muscle ; Mastication ; Posture ; Shoulder ; Students, Dental ; Temporomandibular Joint Disorders ; Tooth Attrition ; Tooth Wear* ; Tooth*

No abstract available.
Biliary Atresia* ; Fractures, Spontaneous*

No abstract available.
Odontogenic Cyst, Calcifying* ; Odontoma*

No abstract available.
Odontogenic Cyst, Calcifying* ; Odontoma*

OBJECTIVE: The present study was undertaken to examine the effects of magnesium ion in the culture medium on the development of mouse fertilized oocytes either before or after pronuclear formation, and to investigate whether the effect of magnesium ion is related with the redistributional change of mitochondria. METHODS: Fertilized oocytes obtained from the oviducts of mice at 15 hr after hCG injection before pronuclear formation (pre-PN) or 21 hr after hCG injection after pronuclear formation (post-PN) were used. The embryos were cultured for 3 days with basic T6 medium-magnesium free and various concentrations of magnesium ion, 0.0, 0.5, 1.0, 2.0, 4.0 or 8.0 mM, respectively. After culture, the developmental stages of embryos and the number of nuclei were evaluated. To observe the effects of magnesium ion on the mitochondrial distribution, fertilized oocytes were collected at 21 hr after hCG injection and cultured for 6 hr with various concentration of magnesium ion. As a control, fertilized oocytes with pronuclei at 27 hr after hCG injection were used. RESULTS: The concentration of magnesium ion to accelerate the in vitro development of mouse fertilized oocytes appeared to be at 2.0 mM for the pre-PN and the post-PN stage embryos. In the mitochondrial redistribution patterns, the embryos cultured in 2.0 mM concentration of magnesium ion showed the highest percentage (22.6%) of distinct perinuclear clustering pattern comparing to other experimental group. CONCLUSION: The effect of magnesium ion may be related to the cytoplasmic redistribution of mitochondria. This relationship seems to connect the developmental competence of preimplantation mouse embryos in vitro. These results can suggest that higher concentration of magnesium ion (2.0 mM) than those of conventional culture medium (0.2~1.2 mM) is more suitable for in vitro culture of preimplantation mouse embryos.
Animals ; Cytoplasm ; Embryonic Structures* ; Magnesium* ; Mental Competency ; Mice* ; Mitochondria ; Oocytes ; Oviducts

BACKGROUND: One of the factors that affect the anesthetic risk is preoperative status especially in geriatric patients. So we studied about followings; 1) Can we use APACHE scoring index when we assess the physical status of geriatric patients preoperatively? 2) Is it meaningful in saying the risk of anesthesia? 3) Which one is more significant in predicting the morbidity and mortality: acute physiologic status vs chronic health status? METHOD: Preoperative status of the geriatric patients (above 65 years old), who were received operation from June 1994 to March 1996 at Hanil General Hospital, were assessed by APACHE scoring index and ASA classification. Age, sex, type of operation, emergency or elective, method of anesthesia, duration of procedure, APACHE scoring index, ASA classification, perioperative complication, postoperative complication is coded by grading or type. RESULT: Perioperative complication was showed statistically significant with acute physiologic score (APS) and duration of procedure. Postoperative complication was showed statistically significant with APACHE score or ASA class. Total complication was affected by duration of procedure and APS score. There was also correlation between ASA class and total complication. Among 265 cases, 1 case expired during operation and 7 cases expired after operation. Causes of postoperative death were pneumonia, hemorrhagic shock etc. CONCLUSION: In geriatric patients, 1) APACHE scoring index is available for preoperative assessment. 2) APACHE scoring index is meaningful in predicting the risk of anesthesia. 3) Perioperative complication was more correlated with acute physiologic status than chronic health evaluation.
Anesthesia ; APACHE* ; Classification ; Emergencies ; Hospitals, General ; Humans ; Mortality ; Pneumonia ; Postoperative Complications ; Shock, Hemorrhagic

No abstract available.
Acromioclavicular Joint* ; Classification* ; Dislocations*