Abstract: The present invention relates to a device for collecting body fluids including (a) a fluid receiving part including a fluid receiving space in which an internal low pressure less than an external atmospheric pressure is formed; (b) a fluid collection part including a hollow microstructure connected to form an open system with the fluid receiving space of the fluid receiving part; and (c) a microstructure hollow barrier for blocking the hollow of the microstructure to maintain the internal low pressure formed in the fluid receiving means.

Abstract: The present invention relates to a method for fabricating a hollow microneedle having a variable appearance. The method makes it possible to vary the length of the microneedle, the outer and inner diameters of the upper and lower parts thereof, the aspect ratio, the sharpness, and the structural bending rate thereof, in accordance with the purposes of the same. Accordingly, the appearance of the hollow microneedles according to the present invention can be varied with flexibility according to various purposes, such as the transferring of medication and the taking of a blood sample, and to various factors, such as the target part for the medication transfer, the depth of the medication transfer, and the amount and viscosity of the medication. Thus, the microneedle can be used as a multi-purpose device for transferring medication.