35 results on '"Mohammed, Osama"'
Search Results
2. Multiple Intramedullary Nailing Versus Low Profile Mini-Plating in Unstable Metacarpal Neck Fractures
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Muhammad Abdel-Monem Quolquela, Mohammed Osama Ramadan, Amr A. Aboelnaga, and Mostafa Hussein Hegazy
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Intramedullary rod ,medicine.medical_specialty ,business.industry ,law ,Plating ,medicine ,General Medicine ,business ,Surgery ,law.invention - Abstract
Background: Neck fractures of the metacarpal bone can alter optimal hand function. Many surgical fixation techniques are described for this fracture with no robust evidence for the best treatment. Recently developed low profile plates may, however, challenge the preference for K-wires. Low profile plates were found to have lower complications than conventional plates in addition to early range of motion and early return to work. The aim of the present study was to determine the best outcome in patients with unstable fracture neck metacarpals using either multiple K wires or low profile mini-plating. Methods: This prospective randomized controlled study included 37 patients suffering from metacarpal neck fractures. patients were designated as group 1 (AIN group; 18 patients), and the other consecutive patients were designated as group 2 (LPP group; 19 patients). Both groups were treated within the first 48 hours of their injury and followed up for a minimum period of 40 weeks; the maximum period of follow up was 48 weeks. Results: No significant differences were found for PVAS, Q-DASH, TAM, time to radiological union or residual deformities at last follow-up. Grip strength, however, was significantly better in the K-wire group. Operative time and time off work were significantly shorter in the k-wire group. Plate group showed prevalent complications both peri and post-operative hitting 63.2 % of the plate group vs 16.7% in K-wire group. Conclusions: Low profile plates with immediate mobilization paradoxically prolonged operative time, technical demand and disturbing the fracture’s biological environment along with the extra cost were thus not justified by results. Antegrade intramedullary K-wire nailing was superior for the management of unstable metacarpal neck fractures.
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- 2021
3. Sustainable strategy to create multisector or unisector smart economic hubs
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Asmaa Ibrahim, Mohammed Osama Rasmy, and Tarek Abdel Latif Abu Atta
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Cultural Studies ,Sustainable development ,Renewable Energy, Sustainability and the Environment ,Sustainable strategy ,0211 other engineering and technologies ,02 engineering and technology ,Building and Construction ,010501 environmental sciences ,Environmental economics ,01 natural sciences ,Urban Studies ,021105 building & construction ,Architecture ,Business ,0105 earth and related environmental sciences ,Civil and Structural Engineering - Abstract
PurposeThis study explores the best strategies for regional economic development to attract highly skilled populations, regardless of whether the region is a multisector or unisector economic hub. It also determines the development variables affecting the success of integrated regional economic hubs to achieve spatial equality, enhance economic productivity and attain environmental sustainability.Design/methodology/approachIn addition to a qualitative analysis, this study employed quantitative techniques using SPSS software. This allowed amplification of the most significant explanatory variables affecting the weaknesses and strengths of economic hubs.FindingsThe results highlight approaches that can be used to achieve socio-economic sustainability in regional hubs. These include multisectors or main centralised hubs (smart economic regional capital), which provide new services to regions and act as a unidevelopment sector or as a regional, economic capital.Research limitations/implicationsThe study analyses the effect of economic strategies and integration of natural resources and the required core services in regional economic development.Practical implicationsCase studies of successful economic hubs are discussed. The most important services proposed in such hubs promote human development and increase the standard of living.Social implicationsIntegration between the hubs in a region is fundamental to attracting direct investments that can benefit the local population.Originality/valueThe results could help governments, economists and planners implement multisector developmental hubs to achieve sustainable development.
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- 2021
4. Evaluation of Local Corticosteroids Injection in Treatment of Carpal Tunnel Syndrome
- Author
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Mostafa Fersan Sallam, Mohammed Osama Ramadan, Nabil Omar Gharbo, and Muhammed Abd Elmoneam Quolquela
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medicine.medical_specialty ,business.industry ,Medicine ,General Medicine ,business ,Carpal tunnel syndrome ,medicine.disease ,Surgery - Abstract
Background: Carpal tunnel syndrome is the most common type of peripheral nerve entrapment; it affects females more than males; it may be idiopathic or secondary to other disorders especially diabetes mellitus. Carpal tunnel syndrome mostly affects manual workers and may be bilateral or unilateral and mainly affects the dominant hand. Carpal tunnel syndrome has characteristic symptoms and signs including paresthesia and pain along median nerve distribution, these symptoms are usually accompanied by positive provocative tests. Electrodiagnostic studies remain the cornerstone in the diagnosis of CTS. Carpal tunnel syndrome can be treated conservatively by activities of daily living instructions, splints, medical treatments as neurotropic drugs and NSAIDs and local steroid injection. Also, it can be treated by surgical decompression in severe cases. Aims: The aim of this study was to evaluate local steroid injection in the treatment of CTS. Twenty-one patients with mild and moderate CTS were included in this study. Patients and Methods: This was a prospective study included 21 patients with symptoms and signs of mild to moderate CTS attending the outpatient clinic of orthopedic Department, Tanta University Hospitals in the period between February 2019- January 2020. 1 ml Triamcinolone was used with 2 ml lidocaine. Patient’ hand was rested on towel roll flexed about 30 to 45 degrees and injection was done according to landmarks. Night splint was described for 3 days after injection. Results: In regards to clinical assessment; there was a significant clinical improvement after injection and follow-up period as compared to before injection. In regards to electrophysiological assessment; there was a significant improvement in NCS after injection. Conclusion: Local steroid injection is an effective treatment and recommended as a therapeutic tool in the management of idiopathic mild to moderate CTS.
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- 2021
5. Management of Distal Tibial Intra-Articular Fractures by Using Ring External Fixators Assisted Arthroscopically
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Mohammed Osama Mohammed Morsi, Mohammed Safwat Shalabi, Mohammed Abdel Wahab Ibrahim, and Ashraf Abd Al-Daim Mohamed
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030222 orthopedics ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,medicine.medical_treatment ,Arthroscopy ,030229 sport sciences ,medicine.disease ,Pilon fracture ,Surgery ,03 medical and health sciences ,External fixation ,0302 clinical medicine ,Vascularity ,medicine ,Internal fixation ,Tibia ,medicine.symptom ,Prospective cohort study ,business ,Reduction (orthopedic surgery) - Abstract
Background: Tibial pilon fractures are relatively uncommon injuries, representing only 1% of all fractures of the lower limb and 5% to 10% of those of the tibia. Frequent comminution and the thin soft-tissue envelope in the area make the treatment of these fractures challenging. The tibial pilon is characterised by a total absence of muscle coverage and marginal vascularity. Therefore, even moderate trauma often results in extensive soft-tissue damage. Objective: The aim of this present study was to evaluate the arthroscopic assisted (Ilizarov) ring external fixation of distal tibial intra articular (pilon) fractures. Patients and methods: This was a prospective study conducted between February 2012, April 2015 on thirty patients with closed, and Gustilo Types I & II open fractures of pilon fractures of the distal tibia who were admitted to Zagazig University Hospitals. During a period of two years, all cases were treated by Ilizarov fixators with or without limited internal fixation and assessment of intra-articular reduction tibial plafond by arthroscopy. Results: Nineteen patients had right-sided injury, eleven patients had left sided injury and one patient had bilateral injury. At the time of injury, the youngest patient was 19 years old and the oldest was 6o years. The results in relation to pain as distributed according to the fracture. It is noted that the excellent results were with type I & II fracture, while the fair and poor results were with type II and III fracture. Conclusion: The present study provided information on the use and the role of ankle arthroscopy in assisting and evaluation (the value, advantages, techniques of ankle arthroscopy and ring external fixators) of distal tibial intra- articular reduction after pilon fracture. The study showed that this technique might be a good method to manage the pilon fractures.
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- 2021
6. HEART RATE RECOVERY TIME AFTER EXCERCISE STRESS TEST IN DIABETIC PATIENTS WITH SUSPECTED CORONARY ARTERY DISEASE
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Ahmed Zein Elabedin Mohammed, Mohammed Osama Fathy Kayed, and Mohammed Samy Abd El-Samee
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medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Ischemia ,Physical examination ,Disease ,medicine.disease ,Coronary artery disease ,Parasympathetic nervous system ,medicine.anatomical_structure ,Informed consent ,Internal medicine ,Diabetes mellitus ,Heart rate ,medicine ,Cardiology ,business - Abstract
Background: Improving recovery after exercise is vital for decreasing cardiac mortality by dominance of parasympathetic nervous system control in recovery time. Objective: To determine the influence of coronary artery disease on heart rate recovery after exercise in patients with diabetes mellitus. Patients and Methods: The ethical approval was obtained from the hospital ethical research committee, in cardiology department in Al-Hussein university hospital from March 2019 to November 2019 and each patient signed an informed consent. Fifty patients were included in this study divided in 4 groups, all with no evident history of ischemic heart disease. Detailed history, physical examination, resting ECG, trans thoracic echocardiography, and finally treadmill exercise stress test was done. In this study we assessed heart rate recovery in 1st, 2nd& 3rd minute and also basal heart rate included. Results: Significant delay in heart rate recovery time was detected in diabetic patients with positive stress ECG test for myocardial included ischemia. Conclusion: Delayed recovery and reduced heart rate recovery after treadmill exercise stress test is an available and important index for detecting and revealing the extent of ischemic burden.
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- 2020
7. Prevalence and Correlation of Depression in Patients Suffering From Type 2 diabetes Mellitus
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Danyah Rizwanulla Sheriff, Mohammed Osama Akhtar, Syed Saud Ahmed, and Zohair Jamil Gazzaz
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Correlation ,medicine.medical_specialty ,Hamilton depression scale ,business.industry ,Diabetes mellitus ,Internal medicine ,Medicine ,Type 2 Diabetes Mellitus ,Major depressive disorder ,In patient ,business ,medicine.disease ,Depression (differential diagnoses) - Abstract
Depression is one of the commonest psychiatric disorders and is a prominent reason for major health problems worldwide. The prevalence and the dysfunction, morbidity, suffering, and economic burden. Depression can lead to upsurge in the health-seeking performance, diminished excellence of life and increased propensity for desperate tendencies. In the majority of the cases, the affected patients report late and owing to various scales of assessing depression, patients with depressive disorder are often undertreated. As per the Global Burden of Disease report the prevalence of depression is 1.9% among men and 3.2% for women and the overall one-year prevalence increases to 5.8% in men and 9.5% in women. Given the existing epidemiological evolution and demographic, the impact of unhappiness can be tremendous by 2020 with the burden of depression at about 5.7% of all the illnesses. The morbidity bearing will be so huge that and it would be the most important reason for disability-adjusted life years (DALYs), next only to ischemic heart disease. This education expected at to assess the prevalence and correlates of depression among type 2 diabetes mellitus patients and impact of treatment on diabetic status, glycemic quality and control of life after 6 months. The scales used in this study was Mini international neuropsychiatric interview – 6.0 , Hamilton Depression Scale (HAM-D), WHO Quality Of Life (WHO-QOL) – BREF scales, Morisky 8-item Medication Adherence Questionnaire. The study has highlighted the prevalence of depression in the study population, positive impact of depression on the treatment compliance, glycemic control and quality of life of the affected patients.
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- 2020
8. Progress Toward Measles Elimination — Eastern Mediterranean Region, 2013–2019
- Author
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James Alexander, Abdul Shakoor Waciqi, Muhammad Farid, Hanan Elhag Abdo Mukhtar, Mohammed Osama Mere, Nasrin Musa, Hossam Ashmony, Javed Iqbal, James L. Goodson, Amany Ghoniem, Nadia Teleb, and Quamrul Hassan
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Health (social science) ,Genotype ,Epidemiology ,Vaccination schedule ,Health, Toxicology and Mutagenesis ,Measles Vaccine ,Population ,Measles ,Middle East ,Africa, Northern ,Health Information Management ,Environmental health ,Humans ,Medicine ,Full Report ,Disease Eradication ,education ,education.field_of_study ,Immunization Programs ,business.industry ,Incidence ,Incidence (epidemiology) ,Outbreak ,General Medicine ,medicine.disease ,Immunization ,Population Surveillance ,Measles vaccine ,business - Abstract
In 1997, during the 41st session of the Regional Committee for the Eastern Mediterranean, the 21 countries in the World Health Organization (WHO) Eastern Mediterranean Region* (EMR) passed a resolution to eliminate† measles (1). In 2015, this goal was included as a priority in the Eastern Mediterranean Vaccine Action Plan 2016-2020 (EMVAP) (2), endorsed at the 62nd session of the Regional Committee (3). To achieve this goal, the WHO Regional Office for the Eastern Mediterranean developed a four-pronged strategy: 1) achieve ≥95% vaccination coverage with the first dose of measles-containing vaccine (MCV1) among children in every district of each country through routine immunization services; 2) achieve ≥95% vaccination coverage with a second MCV dose (MCV2) in every district of each country either through implementation of a routine 2-dose vaccination schedule or through supplementary immunization activities§ (SIAs); 3) conduct high-quality, case-based surveillance in all countries; and 4) provide optimal measles clinical case management, including dietary supplementation with vitamin A (4). This report describes progress toward measles elimination in EMR during 2013-2019 and updates a previous report (5). Estimated MCV1 coverage increased from 79% in 2013 to 82% in 2018. MCV2 coverage increased from 59% in 2013 to 74% in 2018. In addition, during 2013-2019, approximately 326.4 million children received MCV during SIAs. Reported confirmed measles incidence increased from 33.5 per 1 million persons in 2013 to 91.2 in 2018, with large outbreaks occurring in Pakistan, Somalia, and Yemen; incidence decreased to 23.3 in 2019. In 2019, the rate of discarded nonmeasles cases¶ was 5.4 per 100,000 population. To achieve measles elimination in the EMR, increased visibility of efforts to achieve the measles elimination goal is critically needed, as are sustained and predictable investments to increase MCV1 and MCV2 coverage, conduct high-quality SIAs, and reach populations at risk for not accessing immunization services or living in areas with civil strife.
- Published
- 2020
9. The Relationship Between Dyslipidemia and Lupus Nephritis in Systemic Lupus Erythematosus Patients Attending a Saudi Rheumatic Center, Tabuk
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Mirghani Hyder Osman, Alyoussef Abdullah Abdul Khalig, Mohammed Osama Salih, and Amirthalingam Palanisamy
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lupus nephritis ,medicine.medical_specialty ,Proteinuria ,medicine.diagnostic_test ,Anti-nuclear antibody ,business.industry ,dyslipidemia ,Lupus nephritis ,Renal function ,medicine.disease ,immune system diseases ,Internal medicine ,medicine ,saudi arabia ,Medicine ,Renal biopsy ,medicine.symptom ,business ,Complication ,skin and connective tissue diseases ,Nephritis ,Dyslipidemia - Abstract
Background: There is an increasing awareness of the role of dyslipidemia in lupus nephritis patients, no researchers have studied dyslipidemia in systemic lupus erythematosus (SLE) in Tabuk. In this study, we aimed to investigate the association between dyslipidemia and lupus nephritis in Tabuk, Saudi Arabia. Methods: This cross-sectional comparative longitudinal hospital-based study was conducted at a rheumatic clinic in the North West Armed Force Hospital (NWAFH) during the period April 2014–June 2015. Seventy-three patients diagnosed with SLE were invited to participate in the study. All participants were required to sign a written informed consent, following which they were interviewed using a structured questionnaire. Data collected include demographic data, clinical characteristics, fasting lipid profile, renal function tests, urine analysis, antinuclear antibody, anti-double-stranded antibodies, complement levels, serum albumin, anticardiolipin, ant bodies, and antiphospholipid antibodies. Lupus nephritis was ascertained by renal biopsy. The research was approved by the ethical committees of both the University of Tabuk and the NWAFH and data were analyzed using the Statistical Package for Social Sciences (SPSS). Results: Out of 73 patients with SLE, 86.3% were females with a mean age of 34 ± 6.4 years. Lupus nephritis was evident in 26% of the patients, proteinuria in 44.1%, high total cholesterol in 17.8%, high low-density lipoprotein in 15.1%, high triglycerides in 27.3%, and low high-density lipoproteins in 52.1%. Patients with lupus nephritis had high total cholesterol, high LDL, high TG, and low HDL than those without lupus nephritis P-value < 0.05. Conclusion: Dyslipidemia was more common among patients with SLE nephritis, and an aggressive treatment is recommended to reduce this serious complication. The relatively small size of the study group and the fact that the study was conducted at a single tertiary center are the limitations of this study. Keywords: dyslipidemia, lupus nephritis, Saudi Arabia
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- 2020
10. Anti-Mullerian Hormone as A new Marker for Diagnosis of Poly Cystic Ovary Syndrome
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Abdel Monieum Mohamed Zakaria, Ahmed Kamal Mohamed Abo Sheashea, and Ahmed Mohammed Osama
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030219 obstetrics & reproductive medicine ,biology ,business.industry ,Hyperandrogenism ,Physiology ,030209 endocrinology & metabolism ,Anti-Müllerian hormone ,Retrospective cohort study ,medicine.disease ,Polycystic ovary ,Anovulation ,03 medical and health sciences ,0302 clinical medicine ,medicine ,biology.protein ,Endocrine system ,Androstenedione ,business ,Testosterone - Abstract
Background: Polycystic ovary syndrome (PCOS) is a complex disease characterized by various endocrine disorders that are the potential cause of anovulation and hyperandrogenism. This heterogeneous syndrome affects about 5– 10% of reproductive-age female population and it can be considered the most common endocrine disorder affecting women during reproductive life. PCOS is a multifactorial polygenic disease. Genes that regulate steroidogenesis and folliculogenesis are interested. Hence, AMH measurement has been found to offer a relatively high specificity and sensitivity as a diagnostic marker. Objectives: The study aimed to assess the accuracy of AMH in the prediction of PCOS in patients admitted to Elsayed Galal and El Hussein University Hospital. Subjects and methods: This was a retrospective study that was done on 130 women, divided into two groups, group I include 100 PCOS patients and group II, 30 control subject. Results: The results of this study showed that there was no significant difference between the two groups regarding age, while there was a significant increase in BMI in patients more than in control. The level of LH showed a significant increase in patients more than in the control. The level of FSH showed a significant decrease in patients less than in the control. The Testosterone showed a significant increase in patients more than in the control. The androstenedione showed a significant increase in patients more than in the control group. The AMH showed a highly significant increase in patients more than in the control and in turn the number of follicles in group II (patients) was significantly higher than in the control. The sensitivity of AMH in diagnosis PCOS was 98.0, specificity was 80.0% and the total accuracy was 93.0 at the cutoff of point 0.911. Conclusion: Additional advantages of AMH as diagnostic tool are that it is biological, objective, quantitative marker not affected by day of menses or OCP intake. So in future, more studies should be undertaken to validate its role as diagnostic tool for PCOS.
- Published
- 2019
11. Evaluating the value of intrapartum fetal scalp blood sampling to predict adverse neonatal outcomes: A UK multicentre observational study
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Victoria McQueen, Rachel Tildesley, Sarah Cowey, Caroline MacMahon, Jonathan Frost, John Alexander William Dalton, Rosie Grainger, Jennifer Hartley, Nabila Shahid Saidi, Jennifer Hemers, Mausumi Ghosh, Mathew Prior, Minesh Mistry, Diana Marcus, Stephanie Lamb, Ramya Ram, Phoebe L Tan, Bassel H. Al Wattar, Michelle Jie, Roberta Bugeja, Helene Hoyte, Hana Baig, Aditi Siddharth, Humaira Malik, Sarah Quinn, Therese Kinsella, Konstantinos A. Papadakis, Zora Castling, Sabitra Gurung, Adalina Sacco, Sarah Neary, Ritu Painuly, Hawra Badri, Melissa Pearce, Romana Cuffolo, Uzo Sampson, Rachel Harris, Hannah Louise Price, Mohammed Osama Wahby, Tara Lee, Susan Tracey, Jade Edwards, William Parry Smith, Gomathy Gopal, Atiyah Kamran, Aarti Lakhiani, Nicola Louise Ramshaw, Emma Long, Gillian Elizabeth Lever, Jennifer Tamblyn, Bethan Warwick, Michael Cocker, Bing Tiong, Sara Farrell, Sammy Mak, Kamana Subba, Racheal Louise Johnson, Kavitha Sivakumar, Alexandra Bain, Sophie Kenyon, Helen Stevenson, Alexandra Calvia, Lorraine Kasaven, Louisa Manning, Laura Rachel Bladon, Nina Parker, Melanie Couch, Nicola Tempest, Kelly Murphy, Kathryn Baxter, Simrit Kaur Nijjar, Gillian Coyle, Gina Michel, Rose Ngadze, Trent Corr, Trecia Davidson, Melis Altunel, Michael Stephanou, and AB-FAB study group1
- Subjects
Male ,medicine.medical_specialty ,Umbilical cord ,Fetal Distress ,03 medical and health sciences ,0302 clinical medicine ,Pregnancy ,medicine ,Humans ,Cardiotocography ,030212 general & internal medicine ,Retrospective Studies ,Asphyxia ,Fetus ,Labor, Obstetric ,Scalp ,030219 obstetrics & reproductive medicine ,medicine.diagnostic_test ,business.industry ,Obstetrics ,Infant, Newborn ,Pregnancy Outcome ,Obstetrics and Gynecology ,Hydrogen-Ion Concentration ,Fetal Blood ,United Kingdom ,medicine.anatomical_structure ,Reproductive Medicine ,Neonatal outcomes ,Female ,Observational study ,Blood Gas Analysis ,medicine.symptom ,Acidosis ,business ,Blood sampling - Abstract
Objective: To evaluate the value of fetal scalp blood sampling (FBS) as an adjunct test to cardiotocography, to predict adverse neonatal outcomes.\ud Study design: A multicentre service evaluation observational study in forty-four maternity units in the UK. We collected data retrospectively on pregnant women with singleton pregnancy who received FBS in labour using a standardised data collection tool. The primary outcome was prediction of neonatal acidaemia diagnosed as umbilical cord arterial pH
- Published
- 2019
12. Progress Toward Measles Elimination — Pakistan, 2000–2018
- Author
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James L. Goodson, Mohammed Osama Mere, Quamrul Hasan, James Alexander, Nadia Teleb, Arshad K. Chandio, and Muhammad Suleman Rana
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Male ,Vaccination Coverage ,Health (social science) ,Adolescent ,Epidemiology ,Vaccination schedule ,Health, Toxicology and Mutagenesis ,Measles Vaccine ,Population ,01 natural sciences ,Measles ,03 medical and health sciences ,0302 clinical medicine ,Health Information Management ,Environmental health ,Humans ,Medicine ,Pakistan ,Full Report ,030212 general & internal medicine ,Disease Eradication ,0101 mathematics ,Child ,education ,Immunization Schedule ,Measles elimination ,education.field_of_study ,Immunization Programs ,business.industry ,Incidence (epidemiology) ,010102 general mathematics ,Infant ,General Medicine ,medicine.disease ,Immunization ,Child, Preschool ,Population Surveillance ,Female ,Measles vaccine ,business - Abstract
In 1997, the 21 countries in the World Health Organization (WHO) Eastern Mediterranean Region* (EMR) passed a resolution during the 41st session of the Regional Committee for the Eastern Mediterranean to eliminate measles† (1). In 2015, this goal was included as a priority in the Eastern Mediterranean Vaccine Action Plan 2016-2020 (2), approved at the 62nd session of the Regional Committee (3). To achieve measles elimination, the WHO Regional Office for the Eastern Mediterranean developed the following four-pronged strategy: 1) achieve ≥95% vaccination coverage with the first dose of measles-containing vaccine (MCV) among children in every district of each country through routine immunization services; 2) achieve ≥95% vaccination coverage with a second MCV dose in every district of each country either through implementation of a routine 2-dose vaccination schedule or through supplementary immunization activities (SIAs)§; 3) conduct high-quality, case-based measles surveillance in all countries; and 4) provide optimal measles clinical case management, including dietary supplementation with vitamin A (4). Pakistan, an EMR country with a population of approximately 200 million, accounts for nearly one third of the overall EMR population. This report describes progress and challenges toward measles elimination in Pakistan during 2000-2018. During the study period, estimated coverage with the first MCV dose (MCV1) increased from 57% in 2000 to 76% in 2017. The second MCV dose (MCV2) was introduced nationwide in 2009, and MCV2 coverage increased from 30% in 2009 to 45% in 2017. During 2000-2018, approximately 232.5 million children received doses of MCV during SIAs. Reported confirmed measles incidence increased from an average of 24.6 per 1 million persons during 2000-2009 to an average of 80.4 during 2010-2018, with peaks in 2013 (230.3) and 2018 (153.6). In 2017 and 2018, the rates of suspected cases discarded as nonmeasles after investigation were 2.1 and 1.5 per 100,000 population, reflecting underreporting of cases. To achieve measles elimination, additional efforts are needed to increase MCV1 and MCV2 coverage, develop strategies to identify and reach communities not accessing immunization services, and increase sensitivity of case-based measles surveillance in all districts.
- Published
- 2019
13. Evaluation of Glycated Albumin to Glycated Hemoglobin Ratio as a Predictor for Esophageal varices and its Risk of Bleeding
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Mostafa Shehata EL-said, EL-Sayd Mohammed Mohie EL-Dien, Mohammed Abd El-Hamid Bsyoni, and Ahmed Mohammed Osama
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medicine.medical_specialty ,Cirrhosis ,medicine.diagnostic_test ,business.industry ,Esophagogastroduodenoscopy ,Albumin ,medicine.disease ,Gastroenterology ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Glycated albumin ,Esophageal varices ,chemistry ,030220 oncology & carcinogenesis ,Internal medicine ,Medicine ,Portal hypertension ,030211 gastroenterology & hepatology ,Glycated hemoglobin ,business ,Varices - Abstract
Background: Variceal hemorrhaging due to portal hypertension is a severe complication of liver cirrhosis. Although several biomarkers have been reported as predictors of the presence of varices, it is still difficult to assess the risk of variceal bleeding without esophagogastroduodenoscopy (EGD). The ratio of glycated albumin (GA) to glycated hemoglobin (HbA1c) was reported to increase with the progression of liver fibrosis. The aim of the study was to investigate whether the GA/HbA1c ratio is related to the severity and bleeding risk of the varices. Aim of the work: goal of our study was to assess the value of Glycated albumin to Glycated hemoglobin ratio in the prediction of esophageal varices and assessing its risk of bleeding. Methods: We measured the GA/HbA1c ratio of HCV-related cirrhotic patients and analyzed its relationship with the presence and bleeding risk of varices. Results: The GA/HbA1c ratio was higher in the patients who had the varices with a high risk of hemorrhage than in the patients with a low risk of bleeding. In addition, the GA/HbA1c ratio was higher in patients with varices than that in patients without varices. Furthermore, the GA/HbA1c ratio was the most significantly different parameter of all the factors examined, including the platelet count, prothrombin activity and albumin level. Conclusion: The GA/HbA1c ratio is increased in patients with varices and with the bleeding risk of the varices.
- Published
- 2018
14. Equivalent hardware representation of PM synchronous motors from the physics-based phase variable model obtained through FE computation
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Liu, Z., Mohammed, Osama A., and Liu, Shuo
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Mathematical models -- Reports ,Magnets, Permanent -- Usage ,Business ,Electronics ,Electronics and electrical industries - Abstract
This paper presents an approach utilizing a machine model to achieve an equivalent hardware representation of machines as a computational prototyping tool. The purpose of our study is to find a way to perform hardware experiments of machine control without the actual machine. The proposed approach provides a way to test the control before the machine is fabricated, or in the eases where the controller needs to be experimentally tested before being implemented onto the actual machine. The equivalent hardware of a machine is built using a current controllable load, a controller, and a machine model in a hardware-in-the-loop (HIL) real time simulation environment. The equivalent hardware representation of the machine is achieved by controlling the currents of the controllable load to be the same as the currents of the actual machine under the same operating conditions. The machine model is used to provide the reference signal for the control. In this paper, the introduction of the proposed approach is presented focusing on three issues: the machine model, the procedure to enable the machine model to be compatible with the HIL real time simulation, and performance examination. Finally, the validity of the proposed approach is demonstrated with the voltage and current waveforms and the torque and speed profiles measured at the developed equivalent hardware of the machine. A 2-hp surface mounted permanent magnet (PM) synchronous motor is used as an example machine to present and verify our work. Index Terms--Equivalent hardware representation, hardware-in-the-loop real time simulation, machine model, PM machines.
- Published
- 2009
15. A phase variable model of brushless dc motors based on finite element analysis and its coupling with external circuits
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Mohammed, Osama A., Liu, S., and Liu, Z.
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Finite element method -- Research ,Brushless electric motors -- Research ,Electromagnetism -- Research ,Business ,Electronics ,Electronics and electrical industries - Abstract
This paper presents a fast and accurate brushless dc motor (BLDC) phase variable model for drive system simulations. The developed model was built based on nonlinear transient finite-element analysis to obtain the inductances, back electromotive force as well as the cogging torque. The model was implemented in a Simulink environment through the creation of an adjustable inductance component to account for the dependence of inductances on rotor position. Since no dq model for BLDC actually exists, the significance of this work is that it provides an accurate equivalent circuit model of BLDC motors for utilization in simulation environments. Using the developed model, the sensorless control and the torque ripple control issues were investigated and the simulation results show its practical effectiveness. Index Terms--Brushless dc motor (BLDC), finite element analysis (FEA), motor control, phase variable model.
- Published
- 2005
16. Field-oriented vector control of synchronous motors with additional field winding
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Saleh, Khalid I., Mohammed, Osama A., and Badr, Mohammed A.
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Business ,Electronics ,Electronics and electrical industries - Abstract
This paper presents a new method to control a synchronous motor in such a way to resemble the characteristics of a dc motor. The method suggests including a second field winding to the rotor of a voltage-source-inverter-fed synchronous motor. The angular frequency of the inverter is made equal to the angular rotor speed, (of a self-controlled synchronous motor drive). The added field winding is in space quadrature to the main field winding and is properly excited in such a way as to diminish the direct axis component of the stator current at every load conditions. The motor is controlled to operate with zero power angle from the inverter side and zero direct axis current from the rotor excitation side. Therefore, it operates with minimum stator current and with unity power factor. The addition of the second field winding will not complicate the design because it is just a control winding. This winding may be made with smaller wire cross-section and a larger number of turns. The control on this winding is not complicated and it can be easily created. The synchronous motor along with the added field and the required control loops are simulated and tested extensively. The test results show excellent motor performance in motoring and regenerating modes of operation. Index Terms--Field orientation, self-control, synchronous motor drives.
- Published
- 2004
17. A real-time electromagnetic analysis ofd electric machines for educational purposes and laboratory implementation
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Mohammed, Osama A. and Sebastien, Raphael Y.
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Electromagnetism -- Analysis ,Electromagnetic fields -- Research ,Business ,Electronics ,Electronics and electrical industries - Abstract
This paper present a system for visually analyzing the electromagnetic fields of electrical machines used in the energy conversion laboratory. The system utilizes the finite element method as well as various modules to achieve a real-time effect in the analysis of electrical machines while hand-on experimentation is in progress. The proposed system is aimed at developing a tool that would help improve the student's understanding of electromagnetic fields inside these machines and its use in calculating performance measures as well as operational concepts pertaining to the practical study of electrical machines. Index Terms - Electric machines, electromagnetic fields analysis, energy conversion, electromagnetic field education.
- Published
- 1998
18. Ancillary techniques for the practical implementation of GAs to the optimal design of electromagnetic devices
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Uler, G. Fuat and Mohammed, Osama A.
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Magneto-electric machines -- Design and construction ,Algorithms -- Usage ,Business ,Electronics ,Electronics and electrical industries - Abstract
Genetic Algorithms (GAs) are applied to the design optimization of electromagnetic devices. Techniques used in the practical implementation of the method are discussed in detail. An application example is given highlighting the use of the techniques and indicating the success of the method.
- Published
- 1996
19. Design optimization of electrical machines using genetic algorithms
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Uler, G. Fuat, Mohammed, Osama A., and Koh, Chang-Seop
- Subjects
Magneto-electric machines -- Design and construction ,Business ,Electronics ,Electronics and electrical industries - Abstract
The application of genetic algorithms (GAs) to the design optimization of electromagnetic devices is presented in detail. The method is demonstrated on a magnetizer by optimizing its pole face to obtained the desired magnetic flux density distribution. The shape of the pole face is constructed from the control points by means of uniform nonrational b-splines.
- Published
- 1995
20. Nonlinear shape design sensitivity analysis of magnetostatic problems using boundary element method
- Author
-
Koh, Chang Seop, Mohammed, Osama A., and Hahn, Song-yop
- Subjects
Magnetostatics -- Models ,Magnetic materials -- Models ,Business ,Electronics ,Electronics and electrical industries - Abstract
A design sensitivity analysis is extended to cover the nonlinear magnetostatic problems. The formula is derived using material derivative as boundary integrals of the state and adjoint variables over the deformable boundary. A solution scheme for nonlinear state and adjoint equations using boundary element method is also presented to get accurate sensitivity coefficients. And a normalizing scheme for the pointwise sensitivity coefficients are proposed to avoid a zig-zag shapes during optimization.
- Published
- 1995
21. A 3-D finite element mesh generator for complex volumes
- Author
-
Uler, Fuat G. and Mohammed, Osama A.
- Subjects
Electromagnetic fields -- Analysis ,Coordinates -- Research ,Finite element method -- Usage ,Business ,Electronics ,Electronics and electrical industries - Abstract
A 3-D mesh generator for finite element analysis of electromagnetic field problems has been developed. The software is capable of handling complex topologies such as the organs of the human body. The grid is optimized by performing Delaunay correction. The use of digital image processing techniques is suggested to extract topological information from images. This information i used for identifying the regions of the model by placing initial nodes on the surfaces. An application example shows a simplified model of the human thorax created using the grid generator. It should be noticed that this problem includes most of the difficulties encountered in 3-D mesh generation for the finite element method.
- Published
- 1994
22. Detection of magnetic body using artificial neural network with modified simulated annealing
- Author
-
Koh, Chang Seop, Mohammed, Osama A., and Hahn, Song-yop
- Subjects
Electromagnetic fields -- Analysis ,Functions, Inverse -- Analysis ,Simulated annealing (Mathematics) -- Usage ,Numerical analysis -- Methods ,Neural networks -- Usage ,Business ,Electronics ,Electronics and electrical industries - Abstract
An artificial neural network is applied to the inverse electromagnetic fields problem. In the process of the training the network, it is suggested that the simulated annealing algorithm be used to smooth the output errors before the network is trained with the error back-propagation algorithm. And a general way of defining the control parameters of simulated annealing is presented. As a numerical example, the artificial neural network with the suggested training algorithm is applied to the detection of the magnetic body in magnetic field. I is shown, through the numerical test, that the artificial neural network is ver useful for the inverse electromagnetic field problems, especially in real-time system and the artificial neural network trained with the suggested training algorithm gives much less maximum errors than that trained with the error back-propagation algorithm only.
- Published
- 1994
23. An intelligent system for design optimization of electromagnetic devices
- Author
-
Mohammed, Osama A., Merchant, Riaz, and Uler, Fuat G.
- Subjects
Magneto-electric machines -- Design and construction ,Neural networks -- Usage ,Computer-aided design -- Research ,Business ,Electronics ,Electronics and electrical industries - Abstract
An intelligent system for the design optimization of electromagnetic devices is presented. The system comprises a back-propagation neural network in conjunctio with an optimizing Hopfield Net for performing search and optimization functions. An adaptive algorithm is used to improve the response of the system in a dynamic environment. Data can be input by an experienced designer in addition to a case generator from the finite element (FE) solutions. Optimal designs are obtained quickly once the artificial neural network (ANN) is traine with a variety of topologies. Results of implemented examples are provided to show the effectiveness of the proposed system.
- Published
- 1994
24. Utilizing genetic algorithms for the optimal design of electromagnetic devices
- Author
-
Uler, G. Fuat, Mohammed, Osama A., and Koh, Chang-Seop
- Subjects
Electromagnetism -- Genetic aspects ,Algorithms -- Usage ,Magnetic devices -- Design and construction ,Business ,Electronics ,Electronics and electrical industries - Abstract
A new technique for the design optimization of electromagnetic devices that adopts the Genetic Algorithms (GAs) as the search method is presented. The method is applied to the optimization of the shape of a pole face in an electric motor. The electromagnetic analysis of the devices implemented is performed using 2-D finite elements. The results show an excellent promise and potential of using GAs as an efficient technique for the optimal design problem.
- Published
- 1994
25. Serosurveillance for some diseases in livestock living within protected areas designated for wildlife reintroduction in Saudi Arabia
- Author
-
B Mohammed Osama, N Alagaili Abdulaziz, A S Mohamed, null ouka, A Omer Sawsan, H Elamin Maha, and ME Abu Elzein Eltyeb
- Subjects
Veterinary medicine ,biology ,business.industry ,Akabane virus ,Wildlife ,Brucellosis ,Plant Science ,biology.organism_classification ,medicine.disease ,Microbiology ,Oryx ,Infectious Diseases ,Geography ,Minimum viable population ,Agriculture ,biology.animal ,Grazing ,medicine ,Livestock ,business - Abstract
The aim of this study is to investigate the prevalence of some diseases in domestic livestock in two protected areas in Saudi Arabia where gazelles have been reintroduced. King Khalid Wildlife Research Centre (KKWRC) was established in 1986 to breed and undertake scientific research on Saudi wildlife for reintroduction purposes. Mountain gazelles (Gazella gazella) were reintroduced to the Ibex Reserve 150 km south of Riyadh in central Saudi Arabia, which supports viable population of wild ibex. Sand gazelles (Gazella marica), Mountain gazelles and Arabian oryx (Oryx leucoryx) were reintroduced to Uruq Bani Ma’arid (UBM) Reserve in the Al Rub al Khali desert. Domestic livestock (camels, sheep and goats) owned by local people use the Reserves and the area surrounding for grazing and there is contact between these animals and reintroduced wildlife. Two surveys have been carried out at each Reserve. Serum samples collected from 1012 camel, sheep and goats were screened for some viral, bacterial and parasitic diseases that are of particular concern in Saudi Arabia. The results show the presence of antibodies against tuberculosis, brucellosis, bluetongue virus, akabane virus, contagious pustular dermatitis and toxoplasmosis. The Suadi Wildlife Authority (SWA) coordinated with the Ministry of Agriculture and established monitoring and remedial programmes to control diseases reported in the present study. The epidemiological significance, of the study, to wildlife was discussed. Key words: Domestic livestock, serosurvaillence, Ibex Reserve, Uruq Bani Ma’arid, Saudi Arabia
- Published
- 2013
26. Utilizing Hopfield neural networks and an improved simulated annealing procedure for design optimization of electromagnetic devices
- Author
-
Mohammed, Osama A., Merchant, Riaz S., and Uler, Fuat G.
- Subjects
Magneto-electric machines -- Design and construction ,Neural networks -- Usage ,Simulated annealing (Mathematics) -- Usage ,Business ,Electronics ,Electronics and electrical industries - Abstract
A new method for the design optimization of electromagnetic devices is presented. Improved Simulated Annealing (SA) is used along with the Hopfield neural network (HN) to optimize a solution obtained from a trained multilayered perception (MLP). This results in an overall increase in the speed of optimization. Results are presented for two examples which show the effectiveness of the proposed method in obtaining a near optimal solution.
- Published
- 1993
27. Design optimization of electromagnetic devices using artificial neural networks
- Author
-
Mohammed, Osama A., Park, Dong C., Uler, Fuat G., and Chen Ziqiang
- Subjects
Neural networks -- Usage ,Electromagnetism -- Research ,Magnetic devices -- Design and construction ,Perceptrons -- Usage ,Business ,Electronics ,Electronics and electrical industries - Abstract
A new method for the optimal design of the electromagnetic devices is presented. The method utilizes Artificial Neural Networks (ANNs) in a design environment which encompasses numerical computations and expert's input for generating a variety of ANN training data. Results of two implementation examples are provided. The optimal design is obtained quickly (in a matter of milliseconds) once the ANNs are trained with a variety of geometrical topologies. The procedure explained in this paper can be used to provide good initial designs for use with iterative search techniques (currently used) to reduce searching time. This aspect is highly desirable to increase the effectiveness of the optimal design procedure.
- Published
- 1992
28. A new complication of transesophageal echocardiography: Pulmonary embolization of a right atrial myxoma
- Author
-
Ahmed Abdelgawad, Mohammed Osama, Ashraf Abdelaziz, and Mahmoud M. Ramadan
- Subjects
Pulmonary and Respiratory Medicine ,Adult ,medicine.medical_specialty ,business.industry ,Hemodynamics ,Embolectomy ,Heart Neoplasms ,Electrocardiography ,Treatment Outcome ,Pulmonary embolization ,Predictive Value of Tests ,Medicine ,Humans ,Surgery ,Female ,Radiology ,Heart Atria ,Right Atrial Myxoma ,Cardiology and Cardiovascular Medicine ,business ,Complication ,Pulmonary Embolism ,Myxoma ,Echocardiography, Transesophageal - Published
- 2014
29. A novel technique for multi-track percutaneous balloon mitral valvoplasty
- Author
-
Sherif A. Sakr, Mohammed Osama, and Mahmoud M. Ramadan
- Subjects
Adult ,Balloon Valvuloplasty ,Male ,medicine.medical_specialty ,Cardiac Catheterization ,Percutaneous ,medicine.medical_treatment ,Balloon ,Mitral valve stenosis ,Internal medicine ,Cardiac tamponade ,medicine ,Humans ,Mitral Valve Stenosis ,Cardiac catheterization ,Retrospective Studies ,business.industry ,General Medicine ,medicine.disease ,Surgery ,Cardiac surgery ,Stenosis ,Catheter ,Treatment Outcome ,Cardiology ,Female ,Cardiology and Cardiovascular Medicine ,business ,Follow-Up Studies - Abstract
Percutaneous balloon mitral valvoplasty (PBMV) has become the treatment of choice for severe pliable rheumatic mitral stenosis. The multi-track system is a recent variation of the double-balloon technique and is easier owing to the use of a monorail balloon and a simple, single-guidewire approach. In the present study, we used the double-coil Inoue metal wire with a multi-track balloon instead of the conventional multi-track wire. We studied 62 consecutive patients (55 females) with significant symptomatic rheumatic mitral valve stenosis who underwent multi-track PBMV. Patients were randomized into 2 groups: the first group included 32 patients treated with the novel multi-track technique using the double-coil Inoue metal wire, and the second group included 30 patients treated with the conventional multi-track technique using a balloon endhole catheter and multi-track 0.035 inch stiff wire. None of the patients had cardiac tamponade, systemic thromboembolism, or any groin complications. No statistically significant differences were found between the 2 groups regarding any of the studied variables. There were no in-hospital deaths or complications necessitating emergent cardiac surgery in either group. In conclusion, this new technique with the double-coil Inoue metal wire achieves the double benefit of being as safe as (and indeed easier than) the conventional technique, and it utilizes fewer materials, making the multi-track system more cost-effective.
- Published
- 2013
30. National Heart Institute of Egypt program for thoracoscopic minimally invasive mitral and tricuspid valve surgery
- Author
-
Samar Samir, Tamer El Banna, and Mohammed Osama
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Tricuspid valve ,medicine.anatomical_structure ,business.industry ,medicine ,Cardiology and Cardiovascular Medicine ,business ,Surgery - Published
- 2015
31. Retraction notice to 'A novel technique of multi-track percutaneous balloon mitral commissurotomy (PBMC)' [Egypt. J. Chest Dis. Tuberc. 61/3 (2013) 223–228]
- Author
-
Mohammed Osama, Gamal F. Gomaa, and Sherif A. Sakr
- Subjects
lcsh:RC705-779 ,Novel technique ,medicine.medical_specialty ,Percutaneous ,Notice ,business.industry ,Track (disk drive) ,medicine ,lcsh:Diseases of the respiratory system ,business ,Balloon ,Mitral commissurotomy ,Surgery - Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This paper has been retracted upon mutual agreement between the publisher and the Editor-in-Chief of EJCDT when it was discovered that this article had also been submitted and published in the International Heart Journal http://dx.doi.org/10.1536/ihj.54.196. The authors did not give clarification for the action; therefore the paper was retracted following international publishing practices.
- Published
- 2015
32. On the creation of a generalized design optimization environment for electromagnetic devices
- Author
-
Mohammed, Osama A., Lowther, David A., Lean, Meng H., and Alhalabi, Bassem
- Subjects
Magneto-electric machines -- Design and construction ,Structural optimization -- Research ,Prototypes, Engineering -- Research ,Business ,Electronics ,Electronics and electrical industries - Abstract
When optimizing designs for practical electromagnetic problems, the number of design constraints and variables is increased drastically. The construction and step-by-step creation of an electrical system, in practice, is a trial and error process. The design may lead to a sub-optimal solution since the success of a design depends on the experience of the designer. Optimization requires that all design goals, of a device, be connected into a single objective function with all independent variables and constraints. In practice, effective pre-processing and post processing of data are necessary in addition to the requirements of high performance computing capabilities. To achieve this process, we propose the utilization of the generalized design optimization environment or the virtual designer described in this paper. Index Terms--Blackboard architectures, design optimization, high performance computing, multi objective optimization, prototyping, virtual designer.
- Published
- 2001
33. A modified solution for large sparse symmetric linear systems in electromagnetic field analysis
- Author
-
Jinming, Wang, Dexin, Xie, Yingying, Yao, and Mohammed, Osama A.
- Subjects
Finite element method -- Usage ,Eddy currents (Electric) -- Models ,Business ,Electronics ,Electronics and electrical industries - Abstract
A modified preconditioned conjugate gradient method for solution of large sparse symmetric linear equations is presented. Two controlling parameters are used to reduce the computation time of the incomplete decomposition and each iterative step of the conjugate gradient method. Theoretical analysis and numerical examples show that the method is problem-independent to a certain extent, and could decrease the computation time by 30%~50% than the conventional method. Index Terms--Convergence of conjugate gradient method, eddy current field, finite element analysis, numerical technique.
- Published
- 2001
34. A multi-step method for 3-D nonlinear transient Eddy current problems
- Author
-
Yingying, Yao, Dexin, Xie, Jinming, Wang, and Mohammed, Osama A.
- Subjects
Eddy currents (Electric) -- Analysis ,Differential equations -- Analysis ,Numerical analysis -- Usage ,Transients (Electricity) -- Analysis ,Business ,Electronics ,Electronics and electrical industries - Abstract
A new method for solving the 3-D nonlinear transient eddy current problem is presented in this paper. The original finite element governing equations are separated into two parts: algebraic and differential equations. Multi-step algorithm, which is used only for the variables in conducting area, is adopted to analyze the first order differential equations. The investigating results reveal that this method avoids the oscillation occurred in single-step method and has higher precision with less computational effort. Index Terms--Differential equations, eddy currents, numerical analysis, transient equations.
- Published
- 2001
35. RETRACTED: A novel technique of multi-track percutaneous balloon mitral commissurotomy (PBMC)
- Author
-
Mohammed Osama, Gamal F. Gomaa, and Sherif A. Sakr
- Subjects
lcsh:RC705-779 ,medicine.medical_specialty ,Percutaneous ,Groin ,business.industry ,lcsh:Diseases of the respiratory system ,medicine.disease ,Balloon ,Surgery ,Cardiac surgery ,Mitral valve stenosis ,medicine.anatomical_structure ,Cardiac tamponade ,Medicine ,business ,Complication ,Mitral commissurotomy - Abstract
Background and Aim: Percutaneous balloon mitral commissurotomy (PBMC) has become treatment of choice for severe pliable rheumatic mitral valve stenosis (RMVS). The multi-track system is a recent variant of the double-balloon technique which is easier through the use of a monorail balloon and only a simple, single guidewire approach. In the present study, we sought to use the Inoue metallic wire with multi-track balloon instead of the conventional multi- track wire will make the procedure safer and faster. Subjects and Methods: We studied 62 consecutive patients (55 females) with significant symp- tomatic RMVS who underwent multi-track PBMC. They were randomized into 2 groups: the first group included 32 patients treated with the novel multi-track technique using the double coil Inoue metallic wire, and the second group includes 30 patients treated with the conventional multi-track technique. Results: No statistically significant differences were found between both groups regarding any of the studied variables; apart from the pre-procedural MV area which was significantly lower in the novel-technique group compared to the conventional-technique group. None of the patients had cardiac tamponade, systemic thromboembolism or any groin complication. There were neither in-hospital deaths nor complications necessitating emergent cardiac surgery in both groups. Conclusions: This new technique achieves the double benefit of being safer and easier with Inoue wire and saving excess material with the multi-track system; which is more economic.
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