Major League Soccer (MLS) is a men's professional soccer league sanctioned by U.S. Soccer that represents the sport's highest level in both the United States and Canada. MLS constitutes one of the major professional sports leagues of the United States and Canada. The league comprises 23 teamsâ20 in the U.S. and 3 in Canada.
Most blood collection in the US, UK and Hong Kong is done with an evacuated tube system, (two common systems are Vacutainer (Becton, Dickinson and company) and Vacuette (Greiner Bio-One GmbH). The equipment consists of a plastic hub, a hypodermic needle and a vacuum tube.
The rubber sheath allows multiple tubes of blood to be collected and covers the needle in between tube changes so blood does not collect in the holder. The Portex needle pro (seen in the center) is a needle safety device used with the vacuum tube blood collection system. Note, this blood collection device uses a standard multi-sample collection needle, as seen on the left. Microcapillary tubes are used to collect small volumes of blood.