Abstract: A handheld device including a circuit board including at least one electronic component, a heat pipe disposed on the electronic component to absorb heat generated from the electronic component and to release the absorbed heat in a direction opposite to the electronic component, and a heat sinking material configured to bond the circuit board and the heat pipe to each other. The heat pipe includes an evaporation section disposed on the main processor to absorb heat generated from the main processor, a connection section disposed on a side region of the main board to transfer the absorbed heat in a direction opposite to the main processor, and a condensation section configured to release the transferred heat.

Abstract: Printed surface 202b and 204b in black color are formed on a second plate 2 and a fourth plate 4. The printed surface 202b covers almost the entire surface of the second plate 2 except for an area smaller than a diameter of a through-portion 71 of a third plate 3. A predetermined amount of reagent is applied to the part. The fourth plate 4 is configured in a similar manner to the second plate 2. The printed surfaces allows measurement with transmitted light blocked in the smallest diameter during measurement. This prevents inaccurate measurement due to position misalignment.

Abstract: To provide a body fluid sampling method and its device capable of sampling a minimum necessary amount of blood without loss while reducing a burden on a subject to the minimum. The skin surface of a sampling site is made water repellent. A skin surface thus made water repellent is pierced. A body fluid held in a droplet shape on the pierced skin surface is then collected.