Title :
Biodegradable Polymer Needle Having a Trench for Collecting Blood by Capillary Force
Author :
Aoyagi, S. ; Izumi, H. ; Isono, Y. ; Makihira, K. ; Fukuda, M.
Author_Institution :
Kansai University, JAPAN
Abstract :
This paper proposes a biodegradable polymer (Poly Lactic Acid, called as PLA) needle having a trench for collecting blood. A solid micro needle of polymer can be fabricated by micromolding method. However, a hollow needle is difficult to be fabricated by this method. It is also difficult to fabricate a long hole with ultra high aspect ratio along the centerline of a micromolded needle. On the other hand, it is comparatively easy to fabricate a trench on a needle surface. Blood runs up along this trench by capillary force, which realizes simple and easy blood collection without pumping mechanism. A needle with straight shank is fabricated by contriving wet etching method of a groove on a silicon die. A trench is fabricated on the top surface of the needle by laser micromachining. The performance of collecting blood of this needle is experimentally evaluated.
Keywords :
Biodegradable materials; Blood; Needles; Polymers; Programmable logic arrays; Pump lasers; Silicon; Solids; Surface emitting lasers; Wet etching;
Conference_Titel :
Micro Electro Mechanical Systems, 2006. MEMS 2006 Istanbul. 19th IEEE International Conference on
Conference_Location :
Istanbul, Turkey
Print_ISBN :
0-7803-9475-5
DOI :
10.1109/MEMSYS.2006.1627833