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您的检索式：作者名="Alaa Magdy"
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| 1 | Study on the SEIQR model and applying the epidemiological rates of COVID-19 epidemic spread in Saudi Arabia显示文摘This article attempts to establish a mathematical epidemic model for the outbreak of the new COVID-19 coronavirus.A new consideration for evaluating and controlling the COVID-19 outbreak will be constructed based on the SEIQR Pandemic Model.In this paper,the real data of COVID-19 spread in Saudi Arabia has been used for the mathematical model and dynamic analyses.Including the new reproductive number and detailed stability analysis,the dynamics of the proposed SEIQR model have been applied.The local sensitivity of the reproduction number has been analyzed.The domain of solution and equilibrium based on the SEIQR model have been proved using a Jacobian linearization process.The state of equilibrium and its significance have been proved,and a study of the integrity of the disease-free equilibrium has been carried out.The Lyapunov stability theorem demonstrated the global stability of the current model equilibrium.The SEIQR model has been numerically validated and projected by contrasting the results from the SEIQR model with the actual COVID-19 spread data in Saudi Arabia.The result of this paper shows that the SEIQR model is a model that is effective in analyzing epidemic spread,such as COVID-19.At the end of the study,we have implemented the protocol which helped the Saudi population to stop the spread of COVID-19 rapidly. | Hamdy Youssef Najat Alghamdi Magdy A.Ezzat Alaa A.El-Bary Ahmed M.Shawky | 2021 | Infectious Disease Modelling2021，6，1： | 3 |
| 2 | Mansoura Numeroalphabetic Constipation Score in Obstructed Defecation Syndrome (ODS): Validation of a New Score显示文摘 | Sameh Emile Mohamed Youssef Waleed Thabet Waleed Omar Tito M Abd El-Hamed Ayman Elshobaky Ayman El Nakeeb Alaa Magdy El-Yamani Fouda Mohamed Farid | 2015 | International Journal of Advanced Research (IJAR)2015，，： | 1 |
| 3 | Place of upper endoscopy before and after bariatric surgery: A multicenter experience with 3219 patients显示文摘AIM: To study the preoperative and postoperative role of upper esophagogastroduodenoscopy(EGD) in morbidly obese patients. METHODS: This is a multicenter retrospective study by reviewing the database of patients who underwent bariatric surgery(laparoscopic sleeve gastrectomy, laparoscopic Roux en Y gastric bypass, or laparoscopic minigastric bypass) in the period between 2001 June and 2015 August(Jahra Hospital-Kuwait, Hafr Elbatin Hospital and King Saud Medical City-KSA, and Mansoura University Hospital- Egypt). Patients with age 18-65 years, body mass index(BMI) > 40, or > 35 with comorbidities after failure of many dietetic regimen and acceptable levels of surgical risk were included in the study after having an informed signed consent. We retrospectively reviewed the medical charts of all morbidly obese patients. The patients' preoperative data included clinical history including upper digestive symptoms and preoperative full workup including EGD. Only patients whose charts revealed weather they were symptomatic or not were studied. We categorized patients accordingly into two groups; with(group A) or without(group B) upper digestive symptoms. The endoscopic findings were categorized into 4 groups based on predetermined criteria. The medical record of patients who developed stricture, leak or bleeding after bariatric surgery was reviewed. Logestic regression analysis was used to identify preoperative predictors that might be associated with abnormal endoscopic findings. RESULTS: Three thousand, two hundred and nineteen patients in the study period underwent bariatric surgery(75% LSG, 10% LRYDB, and 15% MGB). Mean BMI was 43 ± 13, mean age 37 ± 9 years, 79% were female. Twenty eight percent had presented with upper digestive symptoms(group A). EGD was considered normal in 2414(75%) patients(9% group A vs 66% group B, P = 0.001). The abnormal endoscopic findings were found high in those patients with upper digestive symptoms. Abnormal findings(one or more) were found in 805(25%) patients(19% group A vs 6% group B, P = 0.001). Seven patients had critical events during conscious sedation due to severe hypoxemia(< 60%). Rate of stricture in our study was 2.6%. Success rate of endoscopic dilation was 100%. One point nine percent patients with gastric leak were identified with 75% success rate of endoscopic therapy. Three point seven percent patients developed acute upper bleeding. Seventy-eight point two percent patients were treated by conservative therapy and EGD was performed in 21.8% with 100% success and 0% complications.CONCLUSION: Our results support the performance of EGD only in patients with upper gastrointestinal symptoms. Endoscopy also offers safe effective tool for anastomotic complications after bariatric surgery. | Mohamed E Abd Ellatif Haitham Alfalah Walid A Asker Ayman E El Nakeeb Alaa Magdy Waleed Thabet Mohamed A Ghaith Emad Abdallah Rania Shahin Asharf Shoma Ibraheim E Dawoud Ashraf Abbas Asaad F Salama Maged Ali Gamal | 2016 | World Journal of Gastrointestinal Endoscopy2016，8，10： | 0 |
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