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Search Results: 1 - 10 of 910 matches for " Adnan Merdad "
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Laparoscopic cholecystectomy: Rate and predictors for conversion
Merdad Adnan
Saudi Journal of Gastroenterology , 1999,
Abstract: Laparoscopic cholecystectomy (LC) was attempted in 847 patients, 823 (97.2%) were completed laparoscopically and 24 (2.8%) had to be converted to open cholecystectomy (OC). Acute cholecystitis was the commonest reason for conversion (13 out of 24 patients). Patients who had acute cholecystitis are five times at risk for conversion to open than other patients with non-acute cholecystitis (p< 0.00I ). Age and sex were not statistically significant predictors for conversion. There were no mortalities and no major bile duct injuries in our series. These data confirms the safety of LC, identify factors which predicts conversion to OC and may be helpful in selecting patients for day care ambulatory LC.
Frozen Section Analysis of Breast Lumpectomy Margins  [PDF]
Fatma Khinaifis Althoubaity, Adnan Merdad, Nouf Yahya Akeel, Nisar Haider Zaidi, Abdullah Omar Sultan
Surgical Science (SS) , 2017, DOI: 10.4236/ss.2017.86029
Abstract: Objectives: To evaluate breast lumpectomy margins by frozen section in breast conservation surgery. Methods: A retrospective study of frozen section of lumpectomy margins of one hundred ten patients was done at King Abdulaziz University Hospital from June 2007 to June 2013. All patients underwent lumpectomy + Sentinel lymph node biopsy. Patient records were studied for location of mass in breast, size of mass, site of breast, pre or postmenopausal, frozen section margins, new frozen section margins, permanent margins, reoperation. Complications like skin necrosis, numbness, and wound infection were studied. Result: Majority were Saudis (64.5%). Left breast was involved in 60%. Upper outer quadrant was involved in majority (51.9%). Size of mass was less than 1 cm in 14.8% cases, 1 - 2.9 cm in 43.5%, 3 - 4 cm in 13%, more than 4 cm in 10.2%. Lumpectomy plus sentinel lymph node biopsy was done in 96.4% and lumpectomy and axillary lymph node dissection was done in 1.8% cases. Gross margins were positive in 17.3% and frozen margins were positive in 28.2%. New margin on frozen section were positive in 3.6% and negative in 79.1%. Permanent section histology showed positive margins in 5.5% and negative in 94.5% cases. Re-operation was done in 7.3%. Lympho-vascular margins were positive in 20.9%. Skin necrosis was found in 2.2%, numbness was found in 4.4%, wound infection was in 2.2%. Conclusion: Lumpectomy margins with frozen section reduce re-operation and recurrence.
Efficacy and Safety of Gefitinib or Platinum plus Taxane in Egfr-Mutant Advanced Non-Small Cell Lung Cancers: A Meta-Analysis of First-Line Randomized Controlled Trials  [PDF]
Adnan Aydiner
Journal of Cancer Therapy (JCT) , 2012, DOI: 10.4236/jct.2012.324060
Abstract: Purpose: The discovery of EGFR mutations renewed interest in lung cancer translational research since EGFR-dependent pathway plays an important role in the development and progression of human epithelial cancers, including non-small cell lung cancer (NSCLC). The present meta-analysis was performed to review the recent advances with the selective oral EGFR-TK inhibitor gefitinib among EGFR mutation positive patients with NSCLC. Methods: Using the keywords “gefitinib” and “lung cancer” MEDLINE was searched. The primary reports of interest were the randomized controlled trials in NSCL published in peer-reviewed journals. Three recent studies concerning the effect of gefitinib in NSCLC were identified to be relevant for the meta-analysis based on their similarity in terms of study design. PFS and objective response rate (ORR) in gefitinib and platinum/taxane combination were compared by the Hazard ratio (HR) or Odds Ratio (OR) of meta-analysis. Results: The HR (95%CI) of the meta-analysis of 0.41 (0.34 - 0.49) demonstrated that in patients EFGR mutation positive patients, PFS was significantly longer among those who received gefitinib compared to platin derivative/taxane combination. Furthermore, OR of the meta-analysis for ORR was 3.83 (2.72 - 5.40). While hematological toxicity was observed in the majority of the taxane/platinum group, major adverse events in gefitinib patients were skin rashes/acnea, dry skin, elevated liver enzymes and diarrhea. Conclusions: This meta-analysis strongly confirms the efficacy and better tolerability of gefitinib in EGFR positive NSCLC, and the importance of EGFR mutation testing in order to plan first-line treatment in routine clinical practice in NSCLC.
And We Are Still Walking … Wie ein Protestmarsch zum Ansto für die Erforschung einer Bewegung wurde And We Are Still Walking … When a Protest Walk Becomes a Step Towards Research on the Move Y seguimos caminando … Cuando una marcha de protesta se convierte en investigación
Guylaine Racine,Karoline Truchon,Merdad Hage
Forum : Qualitative Social Research , 2008,
Abstract: Im Juni 2005 begaben wir uns mit ca. hundert anderen Teilnehmenden auf den No One Is Illegal March on Ottawa. Dieser 200-Kilometer-Protestmarsch wurde von Solidarity Across Borders und von kanadischen Immigrant/innen ohne Bleiberecht organisiert. In diesem Beitrag wird die Geschichte des Marsches und der Teilnehmer und Teilnehmerinnen dieses einw chigen Events erz hlt, das Teil einer Bewegung für die Anerkennung der Rechte von Menschen war, die nach Kanada immigrieren. Unser Wunsch, hiervon zu berichten, rührt aus unserem mehrfachen Engagement in dieser und für diese Bewegung. Wir versuchen dabei zum einen einige Verbindungen zwischen zwei Erz hlungen zu knüpfen: die eine hat mit dem konkreten Marsch zu tun, die andere mit einem Dokumentarfilm über den Marsch und einem hieran anschlie enden Forschungsprojekt. Zum anderen nutzen wir die Gelegenheit, mit einem Stil des Schreibens und Publizierens zu experimentieren, der uns erm glicht, Text- und Bildmaterial zu verwenden, um Stimmen an die ffentlichkeit zu verhelfen – die von Immigranten und Immigrantinnen ohne Bleiberecht – die sonst nur sehr selten Geh r finden. Indem wir dies tun, wollen wir nicht nur unsere Arbeit vorstellen, sondern auch die Menschen, die sich an dem Marsch beteiligt haben und deren Denken und Handeln uns inspiriert hat. URN: urn:nbn:de:0114-fqs0802293 In June 2005, we joined about one hundred other participants in the No One Is Illegal March on Ottawa. This 200-kilometer march was organized by Solidarity Across Borders and non-status immigrants living in Canada. This paper tells the story of this march and of the people who participated in the week-long event, which was part of a movement to defend the rights of non-status immigrants in Canada. Our desire to tell this story stems from the fact that we are still actively participating in this march in many different ways. We would like to trace some of the connections between what is really two stories: one that relates the actual march, and another that describes a documentary we made and a research project we are conducting on the march. Finally, this paper gives us an opportunity to experiment with a style of writing and publication that allows us to use both images and text in order to bring seldom-heard voices—those of non-status immigrants—into the public sphere. In so doing, we wish to present not only some of our work, but also some of the people who were involved in the march and whose thoughts and actions inspired our work. URN: urn:nbn:de:0114-fqs0802293 En junio de 2005 participamos junto con otros cien participantes en e
Improving the Measurement of Maternal Mortality: The Sisterhood Method Revisited
Leena Merdad, Kenneth Hill, Wendy Graham
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0059834
Abstract: Background Over the past several decades the efforts to improve maternal survival and the consequent demand for accurate estimates of maternal mortality have increased. However, measuring maternal mortality remains a difficult task especially in developing countries with weak information systems. Sibling histories included in household surveys (most notably the Demographic and Health Surveys (DHS)) have emerged as an important source of maternal mortality data. Data have been mainly collected from women and have not been widely collected from men due to concerns about data quality. We assess data quality of histories obtained from men and the potential to improve the efficiency of surveys measuring maternal mortality by collecting such data. Methods and Findings We used data from 10 Demographic and Health Surveys (DHS) that have included a full sibling history in both their women’s and men’s questionnaires. We estimated adult and maternal mortality indicators from histories obtained from men and women. We assessed the completeness and accuracy of these histories using several indicators of data quality. Our study finds that mortality estimates based on sibling histories obtained from men do not systematically or significantly differ from those obtained from women. Quality indicators were similar when comparing data from men and women. Pooling data obtained from men and women produced narrower confidence intervals. Conclusion From experience across nine developing countries, sibling history data obtained from men appear to be a reliable source of information on adult and maternal mortality. Given that there are no significant differences between mortality estimates based on data obtained from men and women, data can be pooled to increase efficiency. This finding improves the feasibility for countries to generate robust empirical estimates of adult and maternal mortality from surveys. Further we recommend that male sibling histories be collected from all sample households rather than from a subsample.
The Effects of Mutual Coupling and Transformer Connection Type on Frequency Response of Unbalanced Three Phase Electrical Distribution System  [PDF]
Omer Gul, Adnan Kaypmaz
Energy and Power Engineering (EPE) , 2010, DOI: 10.4236/epe.2010.24035
Abstract: In this paper, a novel harmonic modeling technique by utilizing the concept of multi-terminal components is presented and applied to frequency scan analysis in multiphase distribution system. The proposed modeling technique is based on gathering the same phase busses and elements as a separate group (phase grouping technique, PGT) and uses multi-terminal components to model three-phase distribution system. Using multi- terminal component and PGT, distribution system elements, particularly, lines and transformers can effectively be modeled even in harmonic domain. The proposed modeling technique is applied to a test system for frequency scan analysis in order to show the frequency response of the test system in single and three-phase conditions. Consequently, the effects of mutual coupling and transformer connection types on three-phase frequency scan responses are analyzed for symmetrical and asymmetrical line configurations.
FE Modeling and Analysis of Isotropic and Orthotropic Beams Using First Order Shear Deformation Theory  [PDF]
M. Adnan Elshafei
Materials Sciences and Applications (MSA) , 2013, DOI: 10.4236/msa.2013.41010
Abstract:

In the present work, a finite element model is developed to analyze the response of isotropic and orthotropic beams, a common structural element for aeronautics and astronautic applications. The assumed field displacements equations of the beams are represented by a first order shear deformation theory, the Timoshenko beam theory. The equations of motion of the beams are derived using Hamilton’s principle. The shear correction factor is used to improve the obtained results. A MATLAB code is constructed to compute the natural frequencies and the static deformations for both types of beams with different boundary conditions. Numerical calculations are carried out to clarify the effects of the thickness-to-length ratio on both the Eigen values and the deflections of the beams due to the applied mechanical load. The obtained results of the proposed model are compared to the available results of other investigators, good agreement is generally obtained.


Behaviour of Reinforced Concrete Columns Strengthened with Ferrocement under Compression Conditions: Experimental Approach  [PDF]
Adnan Al-Sibahy
World Journal of Engineering and Technology (WJET) , 2016, DOI: 10.4236/wjet.2016.44057
Abstract: This paper reports a study based upon experimental investigation which aims to assess the behaviour of reinforced concrete columns strengthened with a new configuration of steel wire mesh as part of ferrocement layer under the action of axial compression loads. Square and circular small scale columns with three different slenderness ratios of 5, 6.7 and 10 were adopted. A comprehensive experimental progarmme was then running to measure the load capacity and both lateral and vertical displacements. The failure mode was also monitored for each tested case. The results obtained was compared with the reference column samples (without wire mesh) and with some expressions suggested by ACI Code. The experimental results showed that the most influential parameter on the property of load carrying capacity is the slenderness of column. As the slenderness increases, the load capacity clearly decreases. The use of wire mesh enhanced the capability of column to resist the axial loads due to confinement role provided by such material. The maximum percentage increase in load carrying capacity for the modified columns compared with those for the reference samples was 53% for the circular column at slenderness ratio of 10. The critical path of the failure mode was similar for all of the tested columns and normally began from the top or bottom ends, then, in some cases, passed through the middle zone of the column. A suitable expression was suggested to be used for calculating the modulus of elasticity of the tested column based upon the value of load carrying capacity under compression loads.
Preliminary Magnetic Susceptibility Results from the Northwestern Part of Madinah, Saudi Arabia: Environmental Degradation of Wadi Aqiq  [PDF]
Haider Zaman, Adnan Aqeel
Open Journal of Geology (OJG) , 2018, DOI: 10.4236/ojg.2018.84026
Abstract: Recent advances in environmental magnetism have led to new applications in understanding soil pollutions from anthropogenic sources. The utility of environmental magnetic techniques varies widely depending on biological, chemical and physical processes that create and transform soils and sediments. Researchers in some European and Asian countries have successfully studied heavy metals in top soils using magnetic susceptibility technique. Accelerated urbanization in the past two decades has significantly altered the environmental landscape of Madinah. A famous wadi Aqiq in the heart of Madinah, an important conduit for groundwater recharge, is one of the most affected. This study thus focuses on magnetic susceptibility application as environmental magnetic technique to map heavy metal concentrations in top soils along wadi Aqiq, northwestern part of Madinah. Higher values of magnetic susceptibility from soil cover than those from parent igneous rocks indicate anthropogenic origin metallic contamination in the study area. The trucks/tankers parking area reveal highest values of magnetic susceptibility. The areas close to heavy vehicular traffic along two major roads also indicate higher magnetic susceptibilities because of enhanced metallic contaminations. The areas covered by residential and commercial buildings reveal medium level of magnetic susceptibilities. The left over asphalted materials at various places in the area is another source of high magnetic susceptibilities. Widely distributed metallic objects in the area, such as hangers, cans, and construction materials also contribute to enhanced soil contamination as evident from high magnetic susceptibilities.
Smoking habits among Saudi female university students : Prevalence, influencing factors and risk awareness
Merdad Leena,Al-Zahrani Mohammad,Farsi Jamila
Annals of Saudi Medicine , 2007,
Abstract:
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