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| 1 | Real time endoscopic ultrasound elastography and strain ratio in the diagnosis of solid pancreatic lesions显示文摘AIM To evaluate the accuracy of the elastography score combined to the strain ratio in the diagnosis of solid pancreatic lesions(SPL). METHODS A total of 172 patients with SPL identified by endoscopic ultrasound were enrolled in the study to evaluate the efficacy of elastography and strain ratio in differentiating malignant from benign lesions. The semi quantitative score of elastography was represented by the strain ratio method. Two areas were selected, area(A) representing the region of interest and area(B) representing the normal area. Area(B) was then divided by area(A). Sensitivity, specificity, positive predictive value(PPV), negative predictive value(NPV), and accuracy were calculated by comparing diagnoses made by elastography, strain ratio and final diagnoses.RESULTS SPL were shown to be benign in 49 patients and malignant in 123 patients. Elastography alone had a sensitivity of 99%, a specificity of 63%, and an accuracy of 88%, a PPV of 87% and an NPV of 96%. The best cut-off level of strain ratio to obtain the maximal area under the curve was 7.8 with a sensitivity of 92%, specificity of 77%, PPV of 91%, NPV of 80% and an accuracy of 88%. Another estimated cut off strain ratio level of 3.8 had a higher sensitivity of 99% and NPV of 96%, but with less specificity, PPV and accuracy 53%, 84% and 86%, respectively. Adding both elastography to strain ratio resulted in a sensitivity of 98%, specificity of 77%, PPV of 91%, NPV of 95% and accuracy of 92% for the diagnosis of SPL. CONCLUSION Combining elastography to strain ratio increases the accuracy of the differentiation of benign from malignant SPL. | Hussein Okasha Shaimaa Elkholy Ramy El-Sayed Mohamed-Naguib Wifi Mohamed El-Nady Walid El-Nabawi Waleed A El-Dayem Mohamed I Radwan Ali Farag Yahya El-sherif Emad Al-Gemeie Ahmed Salman Mohamed El-Sherbiny Ahmed El-Mazny Reem E Mahdy | 2017 | World Journal of Gastroenterology2017，23，32： | 11 |
| 2 | Effect of restoration technique on resistance to fracture of endodontically treated anterior teeth with flared root canals显示文摘This study was designed to compare the impact of post and core systems on resistance to fracture of endodontically treated anterior teeth with flared root canals and to assess their fracture pattern. Sixty central incisors were cut horizontally 2 mm coronal to the cementoenamel junction(CEJ). After root canal therapy, teeth were assigned into 6 groups(n = 10 each) based on a post system and used as follows: Group C, non-flared root received size #1 glass fiber posts(Control); Group AP, flared root restored with anatomical post; Group RC, flared root restored with size #1 fiber post and cemented with thick layer of resin cement; Group CR, flared root restored with size #1 and reinforced with composite resin; Group CM, cast post-core; Group CP, CAD/CAM polymer-infiltrated ceramic post and core.Following post cementation, core build-up and crown insertion, the specimens were thermo-cycled up to 10,000 cycles(5 C/55 C; 30 seconds dwell time, 6 seconds transition time) and then statically loaded at 1 mm/minute crosshead speed using a universal testing machine. One-way ANOVA and Tukey HSD post hoc test(α= 0.05) were used for data analysis. Group C recorded significantly higher resistance to fracture values [(826.9±39.1) N] followed by group CP [(793.8±55.6) N] while group RC yielded the lowest fracture resistance values [(586.7±51.4) N]. The resistance to fracture of wide root canals can be enhanced by using one-piece CAM/CAM post and core as an alternative to the use of either glass fiber post, relined with composite resin increasing the thickness of luting cement or the use of cast post and core system. However, this was an in vitro investigation and further in vivo studies are necessary. | Sary S Borzangy Samah M Saker Walid A Al-Zordk | 2019 | The Journal of Biomedical Research2019，33，2： | 4 |
| 3 | Drainage vs. non-drainage after cholecystectomy for acute cholecystitis:a retrospective study显示文摘Many surgeons practice prophylactic drainage after cholecystectomy without reliable evidence,this study was conducted to answer the question whether to drain or not to drain after cholecystectomy for acute calculous cholecystitis.A retrospective review of all patients who had cholecystectomy for acute cholecystitis in Aseer Central Hospital,Abha,Saudi Arabia,was conducted from April 2010 to April 2012.Data were extracted from hospital case files.Preoperative data included clinical presentation,routine investigations and liver function tests.Operative data included excessive adhesions,bleeding,bile leak,and drain insertion.Complicated cases such as pericholecystic collections,mucocele and empyema were also reported.Patients who needed therapeutic drainage were excluded.Postoperative data included hospital stay,volume of drained fluid,time of drain removal,and drain site problems.The study included 103 patients allocated into two groups;group A(n = 38) for patients with operative drain insertion and group B(n = 65) for patients without drain insertion.The number of patients with preoperative diagnosis of acute non-complicated cholecystitis was significantly greater in group B(80%) than group A(36.8%)(P < 0.001).Operative time was significantly longer in group A.All patients who were converted from laparoscopic to open cholecystectomy were in group A.Multivariate analysis revealed that hospital stay was significantly(P < 0.001) longer in patients with preoperative complications.There was no added benefit for prophylactic drain insertion after cholecystectomy for acute calculous cholecystitis in non-complicated or in complicated cases. | Mohammed A Bawahab Walid M Abd El Maksoud Saeed A Alsareii Fahad S Al Amri Hala F Ali Abdul Rahman Nimeri Abdul Rahman M Al Amri Adel A Assiri Mohammed I Abdul Aziz | 2014 | The Journal of Biomedical Research2014，28，3： | 3 |
| 4 | Inflammatory bowel disease in rats:Bacterial and chemical interaction显示文摘AIM: To develop a novel model of colitis in rats, using a combination of iodoacetamide and enteropathogenic E. coli (EPEC), and to elucidate the pathophysiologic processes implicated in the development of ulcerative colitis (UC). METHODS: Male Sprague-Dawley rats (n = 158) were inoculated intrarectally on a weekly basis with 4 different combinations: (a) 1% methylcellulose (MC), (b) 100 μL of 6% iodoacetamide (IA) in 1% MC, (c) 200 μL containing 4 × 108 colony factor units (CFU) of EPEC, and (d) combined treatment of (IA) followed by bacteria (B) after 2 d. Thirty days post treatment, each of the four groups was divided into two subgroups; the inoculation was stopped for one subgroup and the other subgroup continued with biweekly inoculation until the end of the experiment. Colitis was evaluated by the clinical course of the disease, the macroscopic and microscopic alterations, activity of myeloperoxidase (MPO), and by TNF-α gene expression. RESULTS: Findings indicative of UC were seen in the combined treatment (IA + B) as well as the IA conti-nued treatment groups: the animals showed slow rate of increase in body weight, diarrhea, bloody stools, high colonic ulcer score, as well as histological altera- tions characteristic of UC, with an extensive inflamma- tory reaction. During the course of the experiment, the MPO activity was consistently elevated and the TNF-α gene expression was upregulated compared to the control animals. CONCLUSION: The experimental ulcerative colitis model used in the present study resembles, to a great extent, the human disease. It is reproducible with characteristics indicative of chronicity. | Inaya Abdallah Hajj Hussein Rania Tohme Kassem Barada Mostafa Hassan Mostafa Jean-Noel Freund Rosalyn A Jurjus Walid Karam Abdo Jurjus | 2008 | World Journal of Gastroenterology2008，14，25： | 2 |
| 5 | Synthesis of general topology multiple coupled resonators filters by optimization显示文摘 | Walid a atia kawthar a zaki ali eatia | | 0，，： | 1 |
| 6 | Microvascular pathological features of immediate perinidal parenchyma in cerebral arteriovenous malformations:giant bed capillaries显示文摘 | Walid A Tsuyoshi T Kazuhiro H | 2003 | J Neurosurg2003，98，： | 1 |
| 7 | Trade, Foreign Direct Investment, and R&D Spillovers 显示文摘 | WALID HEJAZI A EDWARD SAFARIAN | 1999 | Journal of International Business Studies1999，30，3： | 1 |
| 8 | Houry The control of spindle length by Hsp70 and Hspll0 molecular chaperones 显示文摘 | Taras Makhnevych Walid A | 2013 | FEBS Lett2013，587，： | 1 |
| 9 | Effect of spalling or tooth breakage on gearmesh stiffness and dynamic response of a one-stage spur gear transmission显示文摘 | Fakher C Walid B Mohamed S A | 2008 | European Journal of Mechanics A/Solids2008，27，4： | 1 |
| 10 | Polymer/layered silicate nanocomposites from thermally stable trialkylimidazolium- treated montrnoriUonite显示文摘 | JEFFREY G WALID A RICK D | 2002 | Chemistry of Materials2002，14，9： | 1 |
| 11 | Performance measurement of reverse logistics enterprise:a comprehensive and integrat- ed approach 显示文摘 | MOHAMMED S WALID A | 2012 | Measuring Business Excellence2012，16，2： | 1 |
| 12 | Dual- Band Dual-Polarizede Perforated Microstrip Antennas for SAR Applications 显示文摘 | LOTFOLLAH L SHAFAI WALID A | 2000 | IEEE Transactions on Antennas and Propagation2000，48，1： | 1 |
| 13 | The role of drains in lumbar spine fusion显示文摘 | Walid MS Abbara M Tolaymat A | | 0，，： | 1 |
| 14 | Stock market vol- atility and exchange rates in emerging countries: A markov-state switching approach显示文摘 | Walid C Chaker A Masood O | 2011 | Emerging Markets Review2011，12，3： | 1 |
| 15 | Low temperature sol-gel processed photocatalytic titania coating显示文摘 | Walid A D Xin J H | 2004 | Journal of Sol-Gel Sci and Tech2004，29，： | 1 |
| 16 | Trade, foreign direct investment, and R&D spillovers 显示文摘 | Walid H Safarian A E | 1999 | Journal of International Business Studies1999，30，3： | 1 |
| 17 | Groundwater management for sustainable development of urban and rural areas in Extreme Arid regions:a case study显示文摘 | Walid A A | 2005 | Water Resources Development2005，21，3： | 1 |
| 18 | A Reverse Logistics Decisions Concep- tual Framework 显示文摘 | Serge L Diane R Walid A K | 2011 | Computers & Industrial Engineering2011，61，3： | 1 |
| 19 | An integrated distributed generation optimization model for distribution system planning显示文摘 | EI-KHATTAM WALID HEGAZY Y G SALAMA M M A | | 0，，02： | 1 |
| 20 | Low temperature sol-gel processed photocatalytic titania coating显示文摘 | Daoud Walid A Xin John H | 2004 | Journal of Sol-Gel Science and Technology2004，29，： | 1 |
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