QBC STAR: Technology

The technology at the heart of the STAR is a process known as Quantitative Buffy Coat (QBC) analysis.  This process, which gives QBC Diagnostics its name, is based on the physiological phenomenon in which the differing densities of blood components will cause them to separate into layers when centrifuged at a high rate of speed.

QBC tubes, including the QBC STAR tube, take advantage of this phenomenon in two ways.  First, through the use of a small plastic float with the approximate density of platelets and white blood cells (the "buffy coat"), those usually small layers can be physically expanded for greater analysis.  Second, stains coating the inside of the tubes stain lymphocytes and monocytes green, platelets yellow, and granulocytes orange, making the difference between layers visible, even to the naked eye.

The STAR combines this technology with its own advances to provide one-of-a-kind ease for the user.  The STAR contains an internal centrifuge, which begins rotating the tube as soon as the start button is pushed.  Once rotation is complete, the illumination/read station of the STAR utilizes a dual light source and optical detector to read the results of the test.  Once complete, the STAR displays the results on the LCD screen, and automatically prints them on its internal thermal printer.

In addition to the technology used to provide test results, the STAR also includes many subsystems to improve the user experience.  The STAR utilizes an embedded microprocessor that is used to provide self-calibration.  The STAR will perform a self-test to ensure proper operation every time it is turned on, or every eight hours if left on continuously.  Additionally, the STAR contains data ports that can be used with additional printers, a keyboard, or a bar scanner to customize it for a user's individual needs.