Patent ID: 7993610

Claim:
A rotor for a blood centrifuge, which comprises: a housing defining a chamber interiorly thereof for receiving a whole blood sample and for containing a predetermined amount of red blood cell absorbent gel, the housing including an upper portion and a lower portion opposite the upper portion, the upper portion having a port formed through the thickness thereof, the port being in fluid communication with the chamber; and a light pipe joined to the upper portion and light transmissively communicating with the upper portion, the light pipe extending at least partially into the chamber; wherein the light pipe extends partially into the chamber and includes a lower free end which is spaced from the lower portion of the housing a predetermined distance so that when a predetermined volume of whole blood is received by the rotor chamber, the lower free end of the light pipe will contact the whole blood, causing the color of the whole blood to be transmissively communicated through the light pipe to the upper portion of the housing and viewable thereat as an indication of the proper volume of the whole blood received by the rotor chamber; and wherein the light pipe is in the form of a cylindrical tube surrounding the port formed in the upper portion and extending therefrom at least partially into the rotor chamber, the cylindrical tube having formed therein an axial bore which is in fluid communication with the port and the chamber.