| 摘要 |
PROBLEM TO BE SOLVED: To surely and stably insert an injection needle by enabling an operator to easily recognize the part or form of a vein. SOLUTION: Light from a light source (1) with a specified wavelength is transmitted through a specified wavelength filter (2) for the light source and radiated on the spot, where a vein part (6) seems to exit, for example, on an upper arm part (5) together with light (3) from a light source for reference and the reflected light is visually observed through a specified wavelength filter (4). The latter filter (4) is held by a holding part (7). |
