Hydrodynamic focusing device

A hydrodynamic focusing device, preferably implemented as a microfluidic device, comprises: a first flow channel (4); a smaller second flow channel (8); an encapsulation region (12) coaxially connected between the first flow channel (4) and the second flow channel (8); and a flue (14) comprising a body (16) and a sample fluid inlet (18), the flue extending from a preferably inclined wall (20) delimiting the enclosure (12) and into the enclosure (12). The body (16) and the sample fluid inlet (18) are each formed with an elongated, preferably teardrop-shaped profile having a front edge (28) facing the first flow channel (4) and relatively long edges (30a, 30b) relatively tapering towards a rear edge (32). 一种流体动力聚焦装置，优选地实现为微流体装置，包括：第一流动通道(4)；较小的第二流动通道(8)；包封区(12)，其同轴连接在所述第一流动通道(4)与所述第二流动通道(8)之间；以及烟道(14)，其包括主体(16)和样品流体入口(18)，所述烟道从定界所述包封区(12)的优选倾斜壁(20)延伸且到所述包封区(12)中。所述主体(16)和所述样品流体入口(18)各自形成有细长，优选地泪珠形轮廓，所述轮廓具有面向所述第一流动通道(4)的前边缘(28)和朝向后边缘(32)相对渐缩的相对长边缘(30a、30b)。