在生理流動條件下分析血小板黏附聚集的簡易微流控芯片技術
發(fā)布時間:2018-10-17 13:25
【摘要】:目的發(fā)展一種在生理流動條件下分析血小板黏附聚集的簡易微流控芯片技術。方法微流控分析芯片基本結構由直微通道及兩側的樣品池和出口組成;利用理論計算和有限元數值軟件ANSYS對微通道流體動力學行為進行分析;微通道用Ⅰ型膠原蛋白修飾,分別在200 s~(-1)靜脈生理性剪切率和1000 s~(-1)動脈生理性剪切率條件下使血液流過微通道,同時通過熒光顯微攝像動態(tài)記錄血液中熒光標記血小板與Ⅰ型膠原蛋白表面的黏附聚集圖像。結果理論和數值分析顯示,700μm×70μm(寬深比10∶1)的微通道具有最優(yōu)的流體剪切率大小分布;相比200 s~(-1)低剪切率,在1000 s~(-1)剪切率條件下血小板初始黏附時間、聚集速率和最大表面覆蓋面積均顯著降低(P0.05);在1000 s~(-1)剪切率條件下,抗凝藥物替羅非班處理呈濃度依賴性地降低血小板表面聚集率,IC50值為23.8 nmol/L。結論該微流控芯片技術可在生理相關性流體剪切率環(huán)境下動態(tài)分析血小板黏附聚集,血樣少,方法簡單易行,未來可用于血小板功能臨床檢測、抗凝藥物藥效和小型動物模型凝血分析。
[Abstract]:Objective to develop a simple microfluidic chip for the analysis of platelet adhesion and aggregation under physiological flow conditions. Methods the basic structure of microfluidic analysis chip was composed of straight microchannel and sample cell and outlet on both sides. The hydrodynamic behavior of microchannel was analyzed by theoretical calculation and finite element software ANSYS, and the microchannel was modified with collagen 鈪,
本文編號:2276799
[Abstract]:Objective to develop a simple microfluidic chip for the analysis of platelet adhesion and aggregation under physiological flow conditions. Methods the basic structure of microfluidic analysis chip was composed of straight microchannel and sample cell and outlet on both sides. The hydrodynamic behavior of microchannel was analyzed by theoretical calculation and finite element software ANSYS, and the microchannel was modified with collagen 鈪,
本文編號:2276799
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