The invention includes an in vitro bleeding time device having an opening through a sheet of material across an outlet. At least a portion the sheet of material contains a coating which includes collagen type I, fibrinogen, fibronectin, and von Willebrand factor. The invention includes a blood coagulation analysis system which has a device with an internal chamber for receiving a blood sample through an inlet. A sheet of material spans a flowpath through a single device outlet. A controller regulates pressure and or flow rate within the device. The invention includes a method for analyzing blood coagulation. Blood provided into a device chamber flows out through an opening through a sheet of material which spans the device outlet. A controller is utilized to control pressure and/or flow rate within the device by controlling the flow rate into the device during formation of a clot blockage of the opening.
本发明包括一种体外出血时间装置,它有一个穿过材料片的开口,横跨出口。材料片的至少一部分含有涂层,该涂层包括 I 型胶原、
纤维蛋白原、纤连蛋白和冯-维勒布兰德因子。本发明包括一种血液凝固分析系统,该系统有一个带有内腔的装置,用于通过入口接收血液样本。材料薄片横跨流道,通过单个设备出口。控制器可调节装置内的压力和流速。本发明包括一种分析血液凝固的方法。进入设备腔室的血液从一个开口流出,流经横跨设备出口的材料片。利用控制器控制装置内的压力和/或流速,方法是在开口处形成血块堵塞时控制进入装置的流速。