PURPOSE: The present study was intended to evaluate the effect of soldering techniques with infrared ray and gas torch under different gap distances (0.3 mm and 0.5 mm) on the tensile strength and surface porosity formation in Ni-Cr base metal alloy. MATERIALS AND METHODS: Thirty five dumbbell shaped Ni-Cr alloy specimens were prepared and assigned to 5 groups according to the soldering method and the gap distance. For the soldering methods, gas torch (G group) and infrared ray (IR group) were compared and each group was subdivided by corresponding gap distance (0.3 mm: G3 and IR3, 0.5 mm: G5, IR5). Specimens of the experimental groups were sectioned in the middle with a diamond disk and embedded in solder blocks according to the predetermined distance. As a control group, 7 specimens were prepared without sectioning or soldering. After the soldering procedure, a tensile strength test was performed using universal testing machine at a crosshead speed 1 mm/min. The proportions of porosity on the fractured surface were calculated on the images acquired through the scanning electronic microscope. RESULTS: Every specimen of G3, G5, IR3 and IR5 was fractured on the solder joint area. However, there was no significant difference between the test groups (P > .05). There was a negative correlation between porosity formation and tensile strength in all the specimens in the test groups (P < .05). CONCLUSION: There was no significant difference in ultimate tensile strength of joints and porosity formations between the gas-oxygen torch soldering and infrared ray soldering technique or between the gap distance of 0.3 mm and 0.5 mm.
Alloys ; Collodion ; Diamond ; Electronics ; Electrons ; Infrared Rays ; Joints ; Porosity ; Tensile Strength

No abstract available.
Stomach Volvulus*

To evaluate the relationship between p53 protein expression and proliferating activity in astrocytic tumors, we performed a study using 37 cases of astrocytic tumors; 13 cases of low-grade astrocytoma (LGA), 9 cases of anaplastic astrocytoma (ANA), and 15 cases of glioblastoma multiforme (GM). The p53 protein expression was studied by immunohistochemical staining (IHC) with DO-7 monoclonal antibody in 37 cases and p53 mutation was detected by single strand conformational polymorphism (SSCP) using PCR products of 31 cases. Proliferating activities were detected by Ki-67 (MIB-1) and proliferating cell nuclear antigen (PCNA). Immunohistochemically, 24.3% (9/37) of astrocytic neoplasms showed p53 expression, which consisted of 7.7% (1/13) of LGA, 44.4% (4/9) of ANA, and 26.7% (4/15) of GM. The p53 expression was statistically significant between the tumor grades. p53 mutations on exon 5 were noted in 6 (19.4%) out of 31 cases of astrocytic tumors. Average indices of MIB-1 and PCNA were 1.5 2.6% and 7.0 10.1% in LGA, 10.0 12.7% and 23.7 23.2% in ANA, and 30.9 22.4% and 69.9 26.7% in GM, respectively. p53 positive group by IHC showed significantly higher average MIB-1 (26.2 23.5%) and PCNA index (56.7 30.3%) than those (12.1 18.3%, 27.6 29.6%) of p53 negative group (p<0.05). p53 mutation group also showed significantly higher MIB-1 (30.7 26.0%) and PCNA index (55.5 32.6%) than those without p53 mutation (10.8 16.5%, 24.2 28.7% respectively). These results showed that about one-fifth of astrocytic tumors have p53 abnormalities, which were related with higher proliferating activities than those without p53 abnormalities.
Astrocytoma ; Exons ; Glioblastoma ; Immunohistochemistry ; Polymerase Chain Reaction ; Proliferating Cell Nuclear Antigen

No abstract available.
Fractures, Compression* ; Osteoporosis* ; Vertebroplasty*

The authors reviewed 17 patients with radial nerve palsy complicating fracture of humerus who were treated at the Department of Orthopedlc Surgery, St. Mary's Hospital Catholic Medical College, for past 3 years from Jan. 1974 to Dec. 1976, and the following results were obtalned. 1. The ratio of male to female in 17 cases with radial nerve palsy was 4 to 1, and In patients within the first decade the ratio was same (1:1). But those in the 3rd and 4th decade showed high incidence of palsy. 2. Among 113 humerus shaft fractures, 17 cases (15.0%) complicated the radial nerve palsy; among 17 cases the middle shaft fractures were 15, lower 2, none in the upper third. 3. The radial nerve was the most vulnerable to injury at the middle third of the humerus, especially when there was comminution of fracture. 4. The incidence of radial nerve palsy in closed fracture (102 cases) was 13.7% (14 cases), and 27.2% (3cases) in open fracture (11 cases). 5. By early surgical exploration the practlcal cause of radial nerve palsy in 9 cases were found; 2 cases by bruise, 2 by interposition, 2 severance of nerve, one stretching, one impaled, and one unknown. 6. There were no signiflcant correlation between the type of nerve damage and the degree of its recovery, and between duration of paralysis since onset and its prognosis. 7. Of the 17 cases with palsy, complete recoveries were obtained 11 cases, 5 incomplete, and no recovery in one.
Contusions ; Female ; Fractures, Closed ; Fractures, Open ; Humans ; Humerus ; Incidence ; Male ; Paralysis ; Prognosis ; Radial Nerve

BACKGROUND: In anemic patients, it has been usually traditional practice to correct the anemic state with preoperative blood transfusion. But now, there is an increasing tendency of refusing blood transfusion due to the transfusional complications, especially AIDS etc. The purpose of this study is to survey the effects of anesthesia in anemic patients with normal cardiopulmonary function compared to non-anemics. METHOD: 40 patients with uterine myoma were divided into two groups, an experimental group of 20 patients with hemoglobin concentration of 8~10 gm% and a control group of 20 patients with hemoglobin concentration higher than 10 gm%, and their blood pressure, pulse rate and arterial oxygen saturation were monitored and compared. RESULTS: There were no significant differences between two groups in blood pressure, pulse rate and arterial oxygen saturation. CONCLUSION: Preoperative blood transfusion, in patients with moderate anemia, does not seem to be a mandatory practice.
Anemia ; Anesthesia ; Blood Pressure ; Blood Transfusion* ; Heart Rate ; Humans ; Leiomyoma* ; Oxygen

PURPOSE: The aim of this study was to develop a baptist electronic Nutritional Screening Program (B-eNSP) that could be easily used to identify patients with nutrition at risk or malnutrition on their admission to hospital using an integrated medical information system and to evaluate validity, reliability and efficiency of B-eNSP. METHODS: From June 1 2009 to June 21 2009, we enrolled 496 patients for prospective research. We analyzed age, sex, weight, height, weight loss in the last 3 months, serum albumin, alteration of dietary intake, gastrointestinal symptom, functional capacity, diagnosis and its relationship to nutritional requirements, physical examination and Subjective Global Assessment (SGA). B-eNSP included body mass index (BMI), weight loss in the last 3 months, serum albumin. Each component was scored. Sensitivity and specificity were calculated to evaluate the validity of the B-eNSP. The receiver operating characteristic (ROC) curve was drawn by using B-eNSP to choose a cut-off value that maximizes sensitivity and specificity and Yoden Index. Comparison with SGA and the reliability of the B-eNSP was done using kappa statistics. RESULTS: The maximum Yoden Index was 0.866 and the cut-off value of the ROC curve was 2. A B-eNSP score higher than 2 was defined as nutrition at risk or malnutrition. Reliability of the B-eNSP was in accordance with SGA by kappa 0.845. CONCLUSION: The B-eNSP can be used efficiently to identify patients with nutrition at risk or malnutrition by simply using an integrated medical information system.
Body Mass Index ; Electronics ; Electrons ; Humans ; Information Systems ; Malnutrition ; Mass Screening ; Nutritional Requirements ; Physical Examination ; Prospective Studies ; Protestantism ; ROC Curve ; Sensitivity and Specificity ; Serum Albumin ; Weight Loss

No abstract available.
Collagen Type IV* ; Mucocutaneous Lymph Node Syndrome* ; Ventricular Function, Left*

Rheumatoid arthritis is considered to be a collagen disease which mainly involves articular structures, sometimes has extraarticular manifestations. It is generally accepted now that periarticular osteoporosis develops in early phase of rheumatoid arthritis and generalized osteoporosis in late period. Of several methods of non-invasive measurement of bone mass, single photon absorptiometry was introduced by Cameron and Sorenson(1963) and it has been used for measuring bone mass by many authors with its precision, reproducibility and objective quantification. We tried to observe the quantitative changes of bone mass in rheumatoid arthritis patients with single photon absorptiometry technique. Through the study of bone densitometry in 30 rheumatoid arthritic women compared with age-matched 60 healthy controls, we obtained follow results. 1. Bone mineral density of the rheumatoid arthritis group was lower than that of the control group, but had no significant statistical difference. 2. Bone mineral density of the 40–49-year-old group and 50–59-year-old group was considerablely different in the rheumatoid arthritis group and control group. 3. Bone mineral density of the group whose rheumatoid arthritis history was over 2 year was lower than that of the group below 2 year.
Absorptiometry, Photon ; Arthritis, Rheumatoid ; Bone Density ; Collagen Diseases ; Densitometry ; Female ; Humans ; Osteoporosis

The femoral neck fracture having concomitant fracture of the femoral shaft occurs predaminantly in young man and have known to associate the serious complications. One of such factures is sometimes overlooked and is possibly due to a more obvious nature of the shaft fracture than that of the ipsilateral neck. Six cases of this type of combined fractures in ipsilateral femur are reported with the review of 1 iteratures. In six cases of the femoral neck fractures, three which were unrecognized at initial examiaation in early phase, resulting in serious residue as much as deformity and avascular necrosis of the femoral head, and other three were recognized in early at initial examination healed in good anatomic position and in due time. Through this observation it is stressed that early discovery and adaquate treatment of the fracture is the only solution to minimize the sequelae.
Congenital Abnormalities ; Femoral Neck Fractures ; Femur ; Femur Neck ; Head ; Neck ; Necrosis