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Multi-center phase 3 clinical study of fever reduction effectiveness in children age 24-72 months using combined therapy (ibuprofen plus paracetamol) compared to monotherapy with paracetamol and/or ibuprofen - NORMOTHERMIA

开始日期2016-11-10

申办/合作机构

Aflofarm Farmacja Polska SP zoo

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项与 Aflofarm Farmacja Polska SP zoo 相关的文献（医药）

2023-09-18·Journal of functional biomaterials

Adhesion and Activation of Blood Platelets on Laser-Structured Surfaces of Biomedical Metal Alloys.

Article

作者: Komorowski, Piotr ; Walkowiak-Przybyło, Magdalena ; Kamińska, Marta ; Walkowiak, Bogdan ; Jastrzębska, Aleksandra ; Walczyńska, Marta

The laser surface modification of metallic implants presents a promising alternative to other surface modification techniques. A total of four alloyed metallic biomaterials were used for this study: medical steel (AISI 316L), cobalt-chromium-molybdenum alloy (CoCrMo) and titanium alloys (Ti6Al4V and Ti6Al7Nb). Samples of metallic biomaterials after machining were subjected to polishing or laser modification in two different versions. The results of surface modification were documented using SEM imaging and roughness measurement. After modification, the samples were sterilized with dry hot air, then exposed to citrate blood, washed with PBS buffer, fixed with glutaraldehyde, sputtered with a layer of gold and imaged using SEM to enable the quantification of adhered, activated and aggregated platelets on the surface of biomaterial samples. The average total number, counted in the field of view, of adhered platelets on the surfaces of the four tested biomaterials, regardless of the type of modification, did not differ statistically significantly (66 ± 81, 67 ± 75, 61 ± 70 and 57 ± 61 for AISI 316L, CoCrMo, Ti6Al4V and Ti6Al7Nb, respectively) and the average number of platelet aggregates was statistically significantly higher (p < 0.01) on the surfaces of AISI 316L medical steel (42 ± 53) and of the CoCrMo alloy (42 ± 52) compared to the surfaces of the titanium alloys Ti6Al4V (33 ± 39) and Ti6Al7Nb (32 ± 37). Remaining blood after contact was used to assess spontaneous platelet activation and aggregation in whole blood by flow cytometry. An in-depth analysis conducted on the obtained results as a function of the type of modification indicates small but statistically significant differences in the interaction of platelets with the tested surfaces of metallic biomaterials.

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