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RISS 인기검색어
- 검색키워드
- 저자 : Ahmed El‑Assal (검색결과 2 건)
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( Hossam Hosny Masoud ),( Mahmoud Mohamed El-zorkany ),( Azza Anwar Ahmed M. Sc. ),( Hebatallah Hany Assal ) 대한결핵 및 호흡기학회 2021 Tuberculosis and Respiratory Diseases Vol.84 No.1
Background: Pleurodesis fails in 10%-40% of patients with recurrent malignant pleural effusions malignant pleural effusion and dyspnea. This study aimed to assess the values of pleural elastance (P<sub>EL</sub>) after the aspiration of 500 mL of pleural fluid and their relation to the pleurodesis outcome, and to compare the pleurodesis outcome with the chemical characteristics of pleural fluid. Methods: A prospective study was conducted in Kasr El-Aini Hospital, Cairo University, during the period from March 2019 to January 2020. The study population consisted of 40 patients with malignant pleural effusion. The measurement of PEL after the aspiration of 500 mL of fluid was done with “P<sub>EL</sub> 0.5” (cm H<sub>2</sub>O/L), and the characteristics of the pleural fluid were chemically and cytologically analyzed. Pleurodesis was done and the patients were evaluated one month later. The PEL values were compared with pleurodesis outcomes. Results: After 4-week of follow-up, the success rate of pleurodesis was 65%. The P<sub>EL</sub> 0.5 was significantly higher in failed pleurodesis than it was in successful pleurodesis. A cutoff point of P<sub>EL</sub> 0.5 >14.5 cm H<sub>2</sub>O/L was associated with pleurodesis failure with a sensitivity and specificity of 93% and 100%, respectively. The patients with failed pleurodesis had significantly lower pH levels in fluid than those in the successful group (p<0.001). Conclusion: PEL measurement was a significant predictor in differentiating between failed and successful pleurodesis. The increase in acidity of the malignant pleural fluid can be used as a predictor for pleurodesis failure in patients with malignant pleural effusion.
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Mostafa Eid,Saleh Kaytbay,Ahmed El‑Assal,Omayma Elkady 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.11
Poor interfacial structure and severe agglomerations of carbon fiber (CF) are significant problems that face carbon fiberreinforced aluminium (CF/Al) composites. Thus, CF was surface modified with nano copper particles (Cu) to overcomethese problems. Two groups of CF/Al composites (uncoated and coated) at different weight percentages of reinforcement(0, 5, 10, 15, and 20) were fabricated using the planetary ball milling method and then uniaxially hot coined at 550 ℃ under700 MPa. The results showed that CF refined the crystallite size of the Al matrix, and no Al4C3 or Al2Cu were detected inXRD patterns. The density and thermal expansion of composites reduced with increasing CF percentage in all samples. The electrical and thermal conductivities are improved up to 10 wt% of uncoated reinforcement and 15 wt% of coated one. The mechanical test results revealed that by increasing CF, the compressive strength of composites decreased while thewear properties improved for both groups. Cu deposition on CF improved the bonding between reinforcement and matrix,producing composites with better interfacial bonding, fewer agglomerations and porosity, and higher values of the propertiesof the composites.
ScienceON
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