含银海藻酸盐敷料理化性质及其抗菌性能的研究

摘要

Objective To detect the physico-chemical properties , cytotoxicity and antimicrobial activity of dressings containing Ag +.Methods The morphology of this dressing was shown by the scanning electron microscope ( SEM ) .The cytotoxicity was detected by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) method.Using the shake flask test method , the antibacterial effect of dressings was studied .Result There was no significant difference in the water vapor transmission rate between the dressings (P>0.05).Compared with the alginate calcium dressing ,silver ion dressings had a stronger swelling rate .A higher ion concentration would lead to a much larger swelling rate and slower degradation . A lower cytotoxicity was exhibited among the dressings .The silver ion dressing had stronger bacteriostasis to Gram-positive ( G+) and Gram-negative ( G-) bacteria than the alginate calcium dressing .Conclusion The experiment has proved that the silver ion dressing has stronger antibacterial activity and lower cytotoxicity , and it is more effective for wound surface healing, with a shortened treatment course .%目的：探索含银海藻酸盐敷料的理化性质、生物安全性及抗菌活性。方法通过扫描电子显微镜（ SEM ）等实验方法对含银离子海藻酸盐敷料进行形貌及理化特征分析；通过MTT法，检测敷料的生物安全性；结合体外抑菌实验，研究敷料的抗菌效果。结果与海藻酸钙敷料相比，3种不同含量的银离子敷料透气率无显著差异（P＞0．05）；银离子浓度越高，其溶胀比率越高，吸水能力越强，降解越慢；MTT结果显示，细胞毒性较低；体外抑菌实验证实，银离子敷料对革兰阳性、阴性菌均具有良好的抑菌作用，同时显示银离子浓度越高，其抑菌效果越好。结论含银海藻酸盐敷料具有良好的生物相容性和抗菌活性，在创面愈合治疗中具有潜在的应用前景。