A device for drawing fluid from a lumen comprising a body, a first needle portion extending from a forward portion of the body and a second needle portion extending from a rear portion of the body, wherein the body includes an observation portion adapted to allow visual observation of the fluid, and wherein the observation portion is provided with enhancement means adapted to enhance the visibility of the fluid in the observation portion.内腔から流体を取り出す装置は、本体、前記本体の前部から伸びる第1の針部、および前記本体の後部から伸びる第2の針部を有し、前記本体は前記流体を視覚的に観察できる観察部を含み、前記観察部には前記観察部内の流体の視認性を高めるように構成された強化手段が設けられる。