First, we begin with an introduction. In this video, it is explained how to collect laboratory samples for blood analysis. Next, the materials are shown: Sample tubes, a syringe, a tourniquet, and cotton with alcohol. Then, the handwashing procedure is explained: First, apply soap and rub the palms together. Rub the palm of one hand against the back of the other hand, interlacing the fingers. Rub the palms together with the fingers interlaced. Rub the back of the fingers of one hand against the palm of the opposite hand. Surround the thumbs with the palm of the other hand and rub with a rotating movement. Rub the fingertips against the palm using a circular motion. Wash the wrists. Finally, use a disposable towel to turn off the faucet.