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| 1 | Gastric polyps: Association with Helicobacter pylori status and the pathology of the surrounding mucosa, a cross sectional study显示文摘aim:To assess the endoscopic characteristics of gastric polyps and their association with Helicobacter pylori(H.pylori)status in a predominantly Hispanic population.m ETHODS:We conducted a retrospective study of all esophagogastroduodenoscopies performed at our institution.Demographic,endoscopic and histopathological data were reviewed.Categorization of patients into Hispanic and Non-Hispanic was based on selfidentification.Patients without resection/biopsy were not included in the analysis.Identification of polyps type was based on histological examination.One way analysis of variance was used to compare continuousvariables among different polyp types and Fisher’s exact test was used compare categorical variables among polyp types.Unadjusted and adjusted comparisons of demographic and clinical characteristics were performed according to the H.pylori status and polyp type using logistic regressions.RESULTS:Of 7090 patients who had upper endoscopy,335 patients had gastric polyps(4.7%).Resection or biopsy of gastric polyps was performed in 296 patients(88.4%)with a total of 442 polyps removed or biopsied.Of 296 patients,87(29%)had hyperplastic polyps,82(28%)had fundic gland polyps and 5(1.7%)had adenomatous polyps.Hyperplastic polyps were significantly associated with positive H.pylori status compared with fundic gland polyps(OR=4.621;95%CI:1.92-11.13,P=0.001).Hyperplastic polyps were also found to be significantly associated with portal hypertensive gastropathy compared with fundic gland polyps(OR=6.903;95%CI:1.41-33.93,P=0.0174).Out of 296 patients,30(10.1%)had a followup endoscopy with a mean duration of 26±16.3 mo.Interval development of cancer was not noted in any of the patients during follow up period.CONCLUSi ON:Gastric hyperplastic polyps were significantly associated with positive H.pylori status and portal hypertensive gastropathy as compared with fundic gland polyps. | Sherif Elhanafi Mohammed Saadi Wynee Lou Indika Mallawaarachchi Alok Dwivedi Marc Zuckerman Mohamed O Othman | 2015 | World Journal of Gastrointestinal Endoscopy2015，7，10： | 18 |
| 2 | Prediction of regular wave loads on a fixed offshore oscillating water column-wave energy converter using CFD显示文摘In this paper,hydrodynamic wave loads on an offshore stationary-floating oscillating water column(OWC)are investigated via a 2D and 3D computational fluid dynamics(CFD)modeling based on the RANS equations and the VOF surface capturing scheme.The CFD model is validated against previous experiments for nonlinear regular wave interactions with a surface-piercing stationary barge.Following the validation stage,the numerical model is modified to consider the pneumatic damping effect,and an extensive campaign of numerical tests is carried out to study the wave-OWC interactions for different wave periods,wave heights and pneumatic damping factors.It is found that the horizontal wave force is usually larger than the vertical one.Also,there a direct relationship between the pneumatic and hydrodynamic vertical forces with a maximum vertical force almost at the device natural frequency,whereas the pneumatic damping has a little effect on the horizontal force.Additionally,simulating the turbine damping with an orifice plate induces higher vertical loads than utilizing a slot opening.Furthermore,3D modeling significantly escalates and declines the predicted hydrodynamic vertical and horizontal wave loads,respectively. | Ahmed Elhanafi | 2016 | Journal of Ocean Engineering and Science2016，1，4： | 5 |
| 3 | Anatomic variation of prescription points and treatment volume with fractionated high-dose rate gynecological brachytherapy显示文摘 | Elhanafy O A Das R K Paliwal B R | 2002 | J Appl Clin Med Phys2002，3，1： | 1 |
| 4 | Bird fanciers' lung in- duced by exposure to duck and goose feathers 显示文摘 | Cooper C J Teleb M Elhanafi S | 2014 | The American journal of case reports2014，15，： | 1 |
| 5 | A simple meth-od for the direct detection of Salmonella and Escherichia coliO157:H7from raw alfalfa sprouts and spent irrigation waterusing PCR显示文摘 | Johnston LM Elhanafi D Drake M | 2005 | J Food Prot2005，68，11： | 1 |
| 6 | Impact of cold and cold-acid stress on post-stress tolerance and virulence factor expression of Escherichia coli O157:H7显示文摘 | Elhanafi D Leenanon B Bang W | 2004 | Journal of Food Protection2004，67，： | 1 |
| 7 | A novel restriction-modification system is responsible for temperature-dependent phage resistance in listeria monocytogenes ECⅡ 显示文摘 | Kim J W Uutta V Elhanafi D Lee S Osborne J A Kathariou S | 2012 | Appl Environ Mi crobiol2012，78，6： | 1 |
| 8 | Caudate lobe resection for hepatocellular carcinoma显示文摘 | Wahab MA Fathy O Elhanafy E | | 0，，112： | 1 |
| 9 | Optimization of reverse tran-scriptase PCR to detect viable Shiga-Toxin-Producing Escherichia coli显示文摘 | Mclngvale SC Elhanafi D Drake MA | 2002 | Appl Environ Microbiol2002，68，2： | 1 |
| 10 | Evaluation of the diagnostic and therapeutic utility of retrograde through-the-scope balloon enteroscopy and single-balloon enteroscopy显示文摘BACKGROUND Retrograde single balloon enteroscopy(SBE)is a minimally invasive procedure which is less frequently performed compared with antegrade SBE.There are few studies on the retrograde through-the-scope enteroscopy(TTSE),a novel technique for evaluation of the small bowel.AIM To compare the clinical utility and safety of retrograde TTSE with retrograde SBE.METHODS Clinical data and complications of retrograde TTSE(2014-2018)and retrograde SBE(2011-2018)performed in a community hospital were reviewed and presented as mean±SD or frequency(%)and compared using proper statistical tests.Technical success was defined as insertion of the enteroscope>20 cm beyond ileocecal valve.RESULTS Data obtained from 54 retrograde SBE in 49 patients and 27 retrograde TTSE in 26 patients were studied.The most common indication for retrograde enteroscopy was iron deficiency anemia(41 patients)followed by gastrointestinal bleeding(37 patients),and chronic diarrhea(7 patients).The duration of retrograde SBE procedure(91.9±34.2 min)was significantly longer compared with retrograde TTSE(70.5±30.7 min)(P=0.04).Technical success was comparable in TTSE[23/27(85.2%)]and SBE[41/54(75.9%)(P=0.33)].The mean depth of insertion beyond the ileocecal valve in retrograde SBE(92.5±70.0 cm)tended to be longer compared with retrograde TTSE(64.6±49.0 cm)(P=0.08).No complication was observed in this study.CONCLUSION Both retrograde TTSE and retrograde SBE are feasible and safe.Retrograde TTSE takes a shorter time and has a comparable technical success with SBE.TTSE has a lower capacity of small bowel insertion. | Yi Jia Majd Michael Mohammad Bashashati Sherif Elhanafi Christopher Dodoo Alok K Dwivedi Andres F Carrion Mohamed O Othman Marc J Zuckerman | 2020 | World Journal of Gastrointestinal Endoscopy2020，12，11： | 0 |
| 11 | Experimental Investigation of the Small-scale Fixed Multi-chamber OWC Device显示文摘Sea wave energy generators or converters(WECs)have the potential to become a viable technology for clean,renewable energy production.Among the WEC technologies,the oscillating water columns(OWCs)are the most common WEC devices studied.These have been studied and developed over many years.Multi-chamber oscillating water columns(MC-OWC)have the potential to have a higher energy conversion when extracting energy in mixed sea states than single-chamber devices.In the work reported in this paper,physical experiments are carried under regular wave conditions to test the wave power extraction of a fixed MC-OWC small-scale model.The Power Take-Off(PTO)of the device is simulated using orifice plates.The flow characteristics through these orifices are pre-calibrated such that the extracted power can be obtained only using the pressure measurement.Wave condition effects on the damping of the PTO of the device power extraction are addressed.The test results illustrate that the PTO system damping is critical and affects device performance. | Mohammad Shalby Ahmed Elhanafi Paul Walker David G.Dorrell Ahmad Salah Mohamed R.Gomaa Mohamed Behiri | 2021 | Chinese Journal of Mechanical Engineering2021，34，5： | 0 |
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