المؤلفون: Hazem Ahmad, Amr Elnemr, Nazam Ali, Qudeer Hussain, Krisada Chaiyasarn, Panuwat Joyklad

المصدر: Polymers, Vol 13, Iss 24, p 4468 (2021)

مصطلحات موضوعية: concrete, glass fiber-reinforced polymer, stirrups, continuous-beam, moment redistribution, shear capacity, Organic chemistry, QD241-441

الوصف: Fiber-reinforced concrete (FRC) is a competitive solution for the durability of reinforced structures. This paper aims to observe the moment redistribution behavior occurring due to flexural and shear loading in Glass Fiber-Reinforced Polymer- (GFRP) reinforced continuous concrete beams. A rectangular cross-section was adopted in this study with dimensions of 200 mm in width and 300 mm in depth with a constant shear span-to-depth ratio of 3. The reinforcement ratio for the top and bottom were equal at sagging and hogging moment regions. A finite element model was created using Analysis System (ANSYS) and validated with the existing experimental results in the literature review. Based on the literature review, the parametric study was conducted on twelve beam specimens to evaluate the influence of concrete compressive strength, transversal GFRP stirrups ratio, and longitudinal reinforcement ratio on the redistribution of the moment in beams. Several codes and guidelines adopted different analytical models. The Canadian Standards Association (CSA) S806 adopted the modified compression field theory in predicting the shear capacity of the simply supported beams. Recently, various researchers encountered several factors and modifications to account for concrete contribution, longitudinal, and transverse reinforcement. A comparison between the predicting shear capacity of the generated finite element model, the analytical model, and the existing data from the literature was performed. The generated finite element model showed a good agreement with the experimental results, while the beam specimens failed in shear after undergoing significant moment redistribution from hogging to sagging moment region. The moment distribution observed about 21.5% from FEM of beam specimen GN-1.2-0.48-d, while the experimental results achieved 24% at failure load. For high strength concrete presented in beam specimen GH-1.2-0.63-d, the result showed about 20.2% moment distribution, compared to that achieved experimentally of 23% at failure load.

وصف الملف: electronic resource

العلاقة: https://www.mdpi.com/2073-4360/13/24/4468Test; https://doaj.org/toc/2073-4360Test

الوصول الحر: https://doaj.org/article/b732fc1a6c9846cca3445795eba018b4Test

المؤلفون: Wang Amy T, Mullan Rebecca J, Lane Melanie A, Hazem Ahmad, Prasad Chaithra, Gathaiya Nicola W, Fernández-Balsells M, Bagatto Amy, Coto-Yglesias Fernando, Carey Jantey, Elraiyah Tarig A, Erwin Patricia J, Gandhi Gunjan Y, Montori Victor M, Murad Mohammad

المصدر: Systematic Reviews, Vol 1, Iss 1, p 33 (2012)

مصطلحات موضوعية: Treatment, Hyperprolactinemia, Macroprolactinoma, Microprolactinoma, Medicine

الوصف: Abstract Background Hyperprolactinemia is a common endocrine disorder that can be associated with significant morbidity. We conducted a systematic review and meta-analyses of outcomes of hyperprolactinemic patients, including microadenomas and macroadenomas, to provide evidence-based recommendations for practitioners. Through this review, we aimed to compare efficacy and adverse effects of medications, surgery and radiotherapy in the treatment of hyperprolactinemia. Methods We searched electronic databases, reviewed bibliographies of included articles, and contacted experts in the field. Eligible studies provided longitudinal follow-up of patients with hyperprolactinemia and evaluated outcomes of interest. We collected descriptive, quality and outcome data (tumor growth, visual field defects, infertility, sexual dysfunction, amenorrhea/oligomenorrhea and prolactin levels). Results After review, 8 randomized and 178 nonrandomized studies (over 3,000 patients) met inclusion criteria. Compared to no treatment, dopamine agonists significantly reduced prolactin level (weighted mean difference, -45; 95% confidence interval, -77 to −11) and the likelihood of persistent hyperprolactinemia (relative risk, 0.90; 95% confidence interval, 0.81 to 0.99). Cabergoline was more effective than bromocriptine in reducing persistent hyperprolactinemia, amenorrhea/oligomenorrhea, and galactorrhea. A large body of noncomparative literature showed dopamine agonists improved other patient-important outcomes. Low-to-moderate quality evidence supports improved outcomes with surgery and radiotherapy compared to no treatment in patients who were resistant to or intolerant of dopamine agonists. Conclusion Our results provide evidence to support the use of dopamine agonists in reducing prolactin levels and persistent hyperprolactinemia, with cabergoline proving more efficacious than bromocriptine. Radiotherapy and surgery are useful in patients with resistance or intolerance to dopamine agonists.

وصف الملف: electronic resource

العلاقة: http://www.systematicreviewsjournal.com/content/1/1/33Test; https://doaj.org/toc/2046-4053Test

الوصول الحر: https://doaj.org/article/f057892924cc447ea41b0b91e720c0a0Test

المؤلفون: Murad M Hassan, Hazem Ahmad, Coto-Yglesias Fernando, Dzyubak Svitlana, Gupta Shabnum, Bancos Irina, Lane Melanie A, Erwin Patricia J, Berglund Lars, Elraiyah Tarig, Montori Victor M

المصدر: BMC Endocrine Disorders, Vol 12, Iss 1, p 2 (2012)

مصطلحات موضوعية: Hypertriglyceridemia, Cardiovascular disease, Pancreatitis, Systematic reviews and meta-analysis, Diseases of the endocrine glands. Clinical endocrinology, RC648-665

الوصف: Abstract Background Hypertriglyceridemia may be associated with important complications. The aim of this study is to estimate the magnitude of association and quality of supporting evidence linking hypertriglyceridemia to cardiovascular events and pancreatitis. Methods We conducted a systematic review of multiple electronic bibliographic databases and subsequent meta-analysis using a random effects model. Studies eligible for this review followed patients longitudinally and evaluated quantitatively the association of fasting hypertriglyceridemia with the outcomes of interest. Reviewers working independently and in duplicate reviewed studies and extracted data. Results 35 studies provided data sufficient for meta-analysis. The quality of these observational studies was moderate to low with fair level of multivariable adjustments and adequate exposure and outcome ascertainment. Fasting hypertriglyceridemia was significantly associated with cardiovascular death (odds ratios (OR) 1.80; 95% confidence interval (CI) 1.31-2.49), cardiovascular events (OR, 1.37; 95% CI, 1.23-1.53), myocardial infarction (OR, 1.31; 95% CI, 1.15-1.49), and pancreatitis (OR, 3.96; 95% CI, 1.27-12.34, in one study only). The association with all-cause mortality was not statistically significant. Conclusions The current evidence suggests that fasting hypertriglyceridemia is associated with increased risk of cardiovascular death, MI, cardiovascular events, and possibly acute pancreatitis. Précis: hypertriglyceridemia is associated with increased risk of cardiovascular death, MI, cardiovascular events, and possibly acute pancreatitis

وصف الملف: electronic resource

العلاقة: http://www.biomedcentral.com/1472-6823/12/2Test; https://doaj.org/toc/1472-6823Test

الوصول الحر: https://doaj.org/article/869ef4179590493c901fb3b02a66d386Test

المؤلفون: Steinhoff, Martin, Adeli, Mehdi, Riad, Hassan, Allam, Mohamed, Hazem, Ahmad, Alsmadi, Ra’ed, Kamal, Adel Mohamed, Ibrahim, Waad, Al-Nesf, Maryam Ali

المساهمون: Sanofi

المصدر: Journal of Dermatological Treatment ; volume 34, issue 1 ; ISSN 0954-6634 1471-1753

الإتاحة: https://doi.org/10.1080/09546634.2023.2251622Test

المؤلفون: Grünheid, Thorsten, Hazem, Ahmad

المصدر: Frontiers in Public Health ; volume 11 ; ISSN 2296-2565

مصطلحات موضوعية: Public Health, Environmental and Occupational Health

الوصف: Objective To assess the state of mental wellbeing among medical and dental frontline health workers as the COVID-19 pandemic transitions to an endemic phase and to determine what employer-provided intervention strategies these workers perceive as effective and desirable to improve their mental wellbeing. Methods An anonymous online survey distributed to frontline health workers in a hospitalist program of a tertiary care medical center and a university dental school in Minnesota in September 2022. The survey contained validated tools to measure depression severity, levels of perceived stress, and mental health status as well as questions to determine effective strategies to improve emotional wellbeing among these health workers. Data was evaluated on an aggregate level as well as stratified by level (e.g., physician, staff) and field (e.g., medicine, dentistry). Results On average, all groups of health workers suffered from moderate to moderately severe depression, had a much higher perceived stress level than average, and had a fair mental health status. There were no significant differences in depression severity, stress level, or mental health status among physicians, dentists, medical staff, and dental staff. The majority of the respondents perceived adjusted work hours, rewards and incentives, and teamwork as the most effective and desirable strategies to improve their mental wellbeing. Conclusion The current mental wellbeing of frontline health workers is poor. Many are dissatisfied with healthcare and consider leaving the industry. To improve their employees’ mental wellbeing, healthcare employers might want to consider adjusted work hours, rewards, and teamwork as these intervention strategies are perceived as most effective and desirable by the intended recipients.

الإتاحة: https://doi.org/10.3389/fpubh.2023.1204662Test

المؤلفون: Salah Hamada, Omar Y Hammad, Salah A Hemida, Hazem Ahmad Mostafa, Mohammed Hawary Elmor

المصدر: QJM: An International Journal of Medicine. 114

مصطلحات موضوعية: medicine.medical_specialty, medicine.diagnostic_test, business.industry, General Medicine, Intraoperative Hemorrhage, DISC PROLAPSE, Lower limb pain, Endoscopy, Oswestry Disability Index, Surgery, Lumbar, Medicine, business, Prospective cohort study, Diskectomy

الوصف: Background Recurrent disc herniation is the most common cause of reoperation after the primary disc surgery, The management of recurrent disc herniation remains somewhat controversial. Surgical treatment for recurrent disk herniation can be broadly categorized as revision discectomy alone or revision discectomy and fusion or percutaneous endoscopic interlaminar discectomy. Aim of the work to evaluate and compare the therapeutic effect between different modalities of treatment of the recurrent lumbar disc protrusion (RLDP) through 3 groups: (1) First group treated by conventional discectomy. (2) Second group treated by discectomy and lumbar fusion either by PLF, PLIF or TLIF. (3) Third group treated by percutaneous endoscopic interlaminar discectomy. Patients and methods It is a prospective cohort study performed between January 2012 and April 2017 on 150 patients complained of recurrent lumbar disc herniation. They were surgically treated at the Department of Neurosurgery, Ain Shams University Hospitals. All patients are evaluated clinically by VAS, JOA and Oswestry disability index (ODI) through follow up period of 2 years (one month, 6 months, 1 yr, 2 yrs). They were divided into 3 groups (I&II and III) each group was a fifty patients Results the mean overall recovery rate is 89%, comparison between the three groups showed significant improvement of the endoscopic group and fixation group than simple discectomy group in term of VAS LBP, leg pain , JOA and ODI. Intraoperative blood loss, length of operation and hospital stay were significant less in endoscopic group than fixation and simple discectomy group CONCLUSION Recurrent lumbar disc prolapse management is a controversial issue, there are different surgical modalities (either by open discectomy, discectomy and fixation or Percutaneous interlaminar lumbar discectomy PEILD) although those surgical modalities are successful the PEILD is the optional choice that offers less tissue trauma, rapid recovery, less cost effect and early return to work

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::cd9d049204d2f25896a7babfd858343dTest
https://doi.org/10.1093/qjmed/hcab108.009Test

المؤلفون: Alaa Ibrahim, Hisham Ali, Hazem . Ahmad, Mena Mounir

المصدر: Minia Journal of Medical Research. 31:193-195

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::0275da67d89f852f771b9d4ff3a52f9eTest
https://doi.org/10.21608/mjmr.2022.221009Test

المؤلفون: Elmor, Mohammed Hawary, Hemida, Salah Abd Elkhalek, Hammad, Omar Yousef, Mostafa, Hazem Ahmad, Hamada, Salah Mostafa

المصدر: QJM: An International Journal of Medicine ; volume 114, issue Supplement_1 ; ISSN 1460-2725 1460-2393

مصطلحات موضوعية: General Medicine

الوصف: Background Recurrent disc herniation is the most common cause of reoperation after the primary disc surgery, The management of recurrent disc herniation remains somewhat controversial. Surgical treatment for recurrent disk herniation can be broadly categorized as revision discectomy alone or revision discectomy and fusion or percutaneous endoscopic interlaminar discectomy. Aim of the work to evaluate and compare the therapeutic effect between different modalities of treatment of the recurrent lumbar disc protrusion (RLDP) through 3 groups: (1) First group treated by conventional discectomy. (2) Second group treated by discectomy and lumbar fusion either by PLF, PLIF or TLIF. (3) Third group treated by percutaneous endoscopic interlaminar discectomy. Patients and methods It is a prospective cohort study performed between January 2012 and April 2017 on 150 patients complained of recurrent lumbar disc herniation. They were surgically treated at the Department of Neurosurgery, Ain Shams University Hospitals. All patients are evaluated clinically by VAS, JOA and Oswestry disability index (ODI) through follow up period of 2 years (one month, 6 months, 1 yr, 2 yrs). They were divided into 3 groups (I&II and III) each group was a fifty patients Results the mean overall recovery rate is 89%, comparison between the three groups showed significant improvement of the endoscopic group and fixation group than simple discectomy group in term of VAS LBP, leg pain , JOA and ODI. Intraoperative blood loss, length of operation and hospital stay were significant less in endoscopic group than fixation and simple discectomy group CONCLUSION Recurrent lumbar disc prolapse management is a controversial issue, there are different surgical modalities (either by open discectomy, discectomy and fixation or Percutaneous interlaminar lumbar discectomy PEILD) although those surgical modalities are successful the PEILD is the optional choice that offers less tissue trauma, rapid recovery, less cost effect and early return to work

الإتاحة: https://doi.org/10.1093/qjmed/hcab108.009Test
http://academic.oup.com/qjmed/article-pdf/114/Supplement_1/hcab108.009/40497366/hcab108.009.pdfTest

المؤلفون: Al-Otum, Hazem Ahmad Munawer, Alansari, Alaa W.

المصدر: Proceedings of the 2019 5th International Conference on Computer and Technology Applications

الإتاحة: https://doi.org/10.1145/3323933.3324078Test

المؤلفون: Murad, M Hassan, Hazem, Ahmad, Coto-Yglesias, Fernando, Dzyubak, Svitlana, Gupta, Shabnum, Bancos, Irina, Lane, Melanie A, Erwin, Patricia J, Berglund, Lars, Elraiyah, Tarig, Montori, Victor M

مصطلحات موضوعية: Hypertriglyceridemia, Cardiovascular disease, Pancreatitis, Systematic reviews and meta-analysis

الوصف: Background Hypertriglyceridemia may be associated with important complications. The aim of this study is to estimate the magnitude of association and quality of supporting evidence linking hypertriglyceridemia to cardiovascular events and pancreatitis. Methods We conducted a systematic review of multiple electronic bibliographic databases and subsequent meta-analysis using a random effects model. Studies eligible for this review followed patients longitudinally and evaluated quantitatively the association of fasting hypertriglyceridemia with the outcomes of interest. Reviewers working independently and in duplicate reviewed studies and extracted data. Results 35 studies provided data sufficient for meta-analysis. The quality of these observational studies was moderate to low with fair level of multivariable adjustments and adequate exposure and outcome ascertainment. Fasting hypertriglyceridemia was significantly associated with cardiovascular death (odds ratios (OR) 1.80; 95% confidence interval (CI) 1.31-2.49), cardiovascular events (OR, 1.37; 95% CI, 1.23-1.53), myocardial infarction (OR, 1.31; 95% CI, 1.15-1.49), and pancreatitis (OR, 3.96; 95% CI, 1.27-12.34, in one study only). The association with all-cause mortality was not statistically significant. Conclusions The current evidence suggests that fasting hypertriglyceridemia is associated with increased risk of cardiovascular death, MI, cardiovascular events, and possibly acute pancreatitis. Précis: hypertriglyceridemia is associated with increased risk of cardiovascular death, MI, cardiovascular events, and possibly acute pancreatitis

العلاقة: http://www.biomedcentral.com/1472-6823/12/2Test

الإتاحة: http://www.biomedcentral.com/1472-6823/12/2Test