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Search Results: 1 - 10 of 1893 matches for " Ahmet Karamercan "
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Diagnosis and Surgical Treatment of Diaphragmatic Rupture Following Blunt Abdominal Traumas
Ahmet Karamercan,Osman Kurukahvecioglu,Yildirim Imren,Tonguc Utku Yilmaz,Mustafa Sare,Bulent Aytac
Surgery Journal , 2012,
Abstract: Diaphragmatic rupture observed in trauma patients with multiple organ injuries is a rare but serious problem. The incidence rate for diaphragmatic rupture is 0.8-5% while mortality rate is between 16.6-33.3%. There are cases in the literature which diaphragmatic rupture was diagnosed years after the trauma. Symptoms related to heart or lung compression due to early or delayed displacement of the abdominal viscera into the thorax or strangulation of abdominal viscera lead the physician to diagnosis. A 75-year old female patient who presented to the emergency room with shortness of breath, abdominal pain, nausea and vomiting complaints had been in a traffic accident 20 days earlier and admitted to the hospital. Abdominal ultrasound, plain radiographs and laboratory tests after the accident had been normal and the patient was discharged after a 24 h follow-up. Patient had signs of intestinal obstruction and abnormal blood gas values and posterior-anterior chest radiograph revealed elevation of the left hemidiaphragm. Thoracic computarized tomography demonstrated elevation of the posterolateral region of the left hemidiaphragm and displacement of the subdiaphragmatic organs within the thorax, up to the level of the carina. The patient had laparotomy under emergency conditions when rupture of the diaphragm was identified and repaired transabdominally. Diaphragmatic ruptures secondary to blunt traumas can be diagnosed with its early or late symptoms. Non-specific symptoms like chest pain, dyspnea, tachypnea, shortness of breath observed in patients should raise suspicion. Early or late deterioration in blood gas analyses following blunt traumas should be assessed carefully. Diagnosis can be rapidly established with direct radiographs, thoracic computarized tomography and magnetic resonance imaging. Treatment of rupture is surgery. Generally the diaphragm is repaired by the transabdominal approach while complicated ruptures can be assessed with a lower thoracic incision. Being extra vigilant following serious blunt traumas is an important factor in establishing the diagnosis.
Following Accidental Low Dose Sodium Azide Ingestion - Case Report
Ahmet Demircan,Murat ?zsara?,Mehmet Akif Karamercan,Nurettin ?zgür Do?an
Journal of Academic Emergency Medicine , 2011,
Abstract: Sodium azide is used as a preservative in many laboratory settings. Clinical experience with treatment of sodium azide intoxication is very limited. Some publications reported severe side effects such as seizure, coma, respiratory depression, metabolic acidosis, arrhythmia and asystole. Major side effects were observed following doses of 10 mg/kg or over, the minimal lethal dosage. A 25 years old female dentist accidentally ingested approximately 5 ml of a diluted solution of (10 mg) sodium azide. Five minutes after ingestion, she became drowsy and had a generalized tonic-clonic seizure which continued for two minutes and was followed by a postictal period. Critical toxicity symptoms may develop with exposure to low doses of sodium azide. The risk of exposure to sodium azide should be considered especially when there are mental status changes, tremor, tachycardia, temporary vision loss and shortness of breath in the presence of unexplained seizures.
Mathematical Modelling in Placing of Fresh Concrete  [PDF]
Ahmet Bilgil
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.33023
Abstract: The main problem in working with fresh concrete is the aggregate segregation during filling of formwork. The segregation is strongly related to W/C (Water/Cement) ratio. The fresh concrete is usually considered as a Non-Newtonian fluid since it is a mixture of aggregate, cement and water. The flow behavior of the fresh concrete to W/C ratio plays a crucial role in the quality of the high performance concretes by affecting the flow behavior of the fresh concrete. The aggregates in the fresh concrete usually cause segregation in the final product depending on the flow condition. In this study, the mechanism of segregation in such systems was theoretically investigated. The mould filling of fresh concrete was numerically investigated and aggregates were considered as Lagrangian particles and segregation was identified from trajectories of such particles. It was found that the aggregates were trapped at the dead zones leading to segregation in the system. The particle size and geometry of the mould was found to have significantly affect the segregation in the system.
Effect of Low Velocity Impact Damage on Buckling Properties  [PDF]
Ahmet YAPICI, Mehmet METIN
Engineering (ENG) , 2009, DOI: 10.4236/eng.2009.13019
Abstract: The work described herein consists of experimental measurement of the post-impact buckling loads of E- glass/epoxy laminates. Composite samples with stacking sequence of [+45/?45/90/0]2s were subjected to low-velocity impact loading at energy levels of 36, 56.13, 79.95, 110.31 and 144 J. The impact tests were conducted with a specially developed vertical drop weight testing machine. Impact parameters like peak load, absorbed energy, deflection at peak load and damage area were evaluated and compared. Damaged specimens were subjected to compressive axial forces and buckling loads of the specimens were obtained. The relation between energy levels and buckling loads is investigated.
Magnetic Oil Thermal Behavior under Electromagnetic Induction for Energy Efficient Heating System Design  [PDF]
Ahmet Kucukkomurler, Ramazan Selver
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.25038
Abstract: This study describes thermal behavior of magnetic lubricant oil under electromagnetic induction. Experimental set up include oil pump, oil tank, induction heating unit, and heat exchanger. It is a closed loop system where the oil pump circulates oil through oil tank to the system, at the same time induction heating unit heats up to the heat exchanger where the lubricant oil thermal behavior is examined. The unit has been largely studied and tested both magnetic and regular motor oil in a laboratory environment and promising results have been obtained for an actual indoor floor to space heating system design.
Breathing Intolerance Index in COPD and Obesity: A Comparative Observational Study  [PDF]
Ahmet Baydur, Zhanghua Chen
Open Journal of Respiratory Diseases (OJRD) , 2013, DOI: 10.4236/ojrd.2013.33019
Abstract: Background: The breathing intolerance index, BIT, a noninvasive derivation of the tension-time index of respiratory muscles, has been recently used to evaluate patients with respect to their need for noninvasive ventilation. Comparing the BIT index in different disorders with mild to moderate respiratory impairment, such as COPD and obesity, would be useful in determining differences in threshold for respiratory muscle fatigue amongst cohorts. Objectives: The purpose of this study was to compare control of ventilation and BIT in individuals with obesity, chronic obstructive pulmonary disease (COPD), and control subjects free of cardiorespiratory disorders. Because change in posture can alter respiratory load and control of ventilation, variables were assessed in two postures. Methods: We assessed 142 subjects consisting of 81 with obesity, 42 with COPD, and 19 non-smoking healthy adults. All subjects underwent evaluation of pulmonary function, control of ventilation and BIT index [(Ti/Ttot) × (Vt/FVC)] in seated and supine postures. Findings: BIT index was significantly greater in seated posture in all 3 cohorts due primarily to an increase in Vt in this position. BIT index was similar in value amongst cohorts in both postures, but tended to be higher in patients with obesity and COPD. Conclusion: While BIT index is higher in seated posture, and tends to be higher in patients with obesity and COPD as compared to control subjects, discrimination between cohorts is not found in our study because of small inter-group variations of respiratory function amongst cohorts. Thus, in clinically stable patients whose vital capacities are mild to moderately reduced, the BIT index alone cannot be recommended as a predictive guide for initiating assisted ventilation for respiratory failure. Nevertheless, because it is easy to perform, and is comfortably tolerated by patients, its potential usefulness may be in periodic measurements to monitor its increase as respiratory reserve declines.
Solving Water Problems of a Metropolis  [PDF]
Ahmet Mete Saatci
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.54A002

The metropolis of Istanbul has faced water supply challenges throughout history; however the situation escalated in the past decade with rapid population growth. Water demand of an ever-growing city could only be solved by transporting water from surrounding water basins as far as 190 km away from the city border. Moreover, imbalanced distribution of water resources and imbalanced water demand on the European and Asian side of the city was resolved by transporting water from Asian side to the European side, by laying water transmission pipes under the Bosphorus Strait and by constructing a tunnel passing 130 m under the Strait. Another difficulty that required challenging solutions was the protection of water reservoirs of the city, hence illegal settlements arose in the reservoir watershed zones due to fast urban growth and migration from rural areas. Discharge of wastewater from illegal settlements caused not only algae growth in water treatment plant (WTP) of one of the largest reservoirs of Istanbul, but also eventual death of algae was a major setback due to anaerobic conditions created in the reservoir. The problem was solved by tertiary treatment of the wastewater and by diverting the effluent through a tunnel away from the reservoir. The aim of this paper is to provide an insight into setbacks faced in a metropolis of 14 million and technical solutions provided against the pollution of reservoirs.

Procoagulant and Anticoagulant Factors in Childhood Hypothyroidism
Nevin Kilic,Yildiz Dallar,Enver Simsek,Sirma Karamercan,Ayse Esra Tapci,Bulent Alioglu
International Journal of Endocrinology , 2012, DOI: 10.1155/2012/156854
Abstract: The aim of this study was to investigate the effects of thyroid hormone deficiencies in childhood on the elements of coagulation proteins. Consecutive 54 children with hypothyroidism and 55 healthy controls aged 1 month–16 years were enrolled. One year after Na-L-thyroxine treatment, the study parameters were reevaluated. Thyroid function tests, procoagulant and anticoagulant proteins were performed for children with hypothyroidism and healthy controls. Significant decreased results were found in children with hypothyroidism in terms of fibrinogen, TT, and anticoagulant proteins including AT, PC, PS, and fPS. Significant increases were found with respect to APTT, fibrinogen, and TT. In the evaluation of posttreatment changes a statistically significant increase was found in vWF, FVIII, AT, PC, PS, and fPS. A positive correlation was found between fT4 and vWF, FVIII, PC, and PS. We would like to emphasize that the coagulation system especially vWF and FVIII, and particularly the anticoagulant system, should be monitored closely in patients followed up for hypothyroidism. Thyroid hormones should be examined and, if necessary, hormone replacement therapy should be administered in patients followed up for a predisposition to coagulation. Additionally, further studies with larger series are needed to investigate the effects of hypothyroidism on the coagulation system. 1. Introduction Previous studies have demonstrated the association between hypothyroidism and cardiovascular disease due to increased atherosclerosis and associated morbidity [1, 2]. Even though the predisposition of hypothyroid patients to bleeding is described, recent studies have shown that insufficient concentration of thyroid hormones induced a hypercoagulable state. The aim of this study was to investigate the effects of thyroid hormone deficiencies in childhood on the elements of coagulation including procoagulant and anticoagulant proteins. 2. Materials and Methods 2.1. Selection of the Study Groups Consecutive 54 children with hypothyroidism aged 1 month–16 years who presented for the first time to our hospital between 2008 and 2009 and who were diagnosed with the disease were enrolled in the study. The control group consisted of 55 children of the same age who had no chronic diseases and who had presented to the pediatric outpatient clinic for growth, immunization, and development followup or counseling. Data recorded included the chronological age, anthropometric features, presence of concomitant diseases, and medication history of both the patient and control groups. None of the
A Case of Accidental Injection of Epinephrine (Epipen )
Emine Ak?nc?,Yücel Yüzba??o?lu,Mehmet Akif Karamercan
Journal of Academic Emergency Medicine , 2011,
Emotion Regulation Strategies as a Predictor of Life Satisfaction in University Students  [PDF]
Ahmet Yi?it, Ahmet Rag?p ?zpolat, Mehmet Kandemir
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.56062

The goal of this research is to analyze the predictive power level of parent educational background, parent profession and suppression and reappraisal strategies, which are the emotion regulation strategies, on life satisfaction of individuals. Multiple Linear Regression model is used in the study whose research group is made of 422 students from a University, which has a total of 28,000 students, situated in the East of Turkey. Students in the research group are from different grades and demographic features. “Emotion Regulation Scale”, “Satisfaction with Life Scale”, and “Personal Information Form” are used in gathering the data of the research.

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