SIRCHIE - Hexagon Obti - 6 Tests

Hexagon Obti is the perfect complement to the BLUESTAR forensic line of Blood Detection products. This rapid screening test presumes that a bloodstain is of human origin and helps the Investigator to determine whether or not to collect a sample as evidence. A positive result indicates a strong likelihood that the bloodstain is indeed human, and a lab analysis will later confirm or deny that presumption.

What is Hexagon Obti?

Hexagon Obti is a two-part test - 1) a collection tube for the blood sample, 2) a test bar. A sample of the presumed human blood is transferred into the tube with the transport medium. This mixture is then added to the test bar. Typically, a positive reaction will be detected within 2-3 minutes. A single blue line indicates that the testing liquid is working properly, but no human blood has been found. Two blue lines indicate that the test has determined the sample is blood of human origin.

Principle:

Human hemoglobin (hHb) in the sample will react with the reagent consisting of blue colored particles and monoclonal anti-human Hb antibodies. The immunocomplex migrates to the test zone where it's captured by an immobilized second antibody directed against hHb forming a blue test line which indicates a positive result. Unreactive reagents migrate further and are bound in a second line by immobilized anti-mouse lgC antibodies. This control lindicates proper procedural function and correct handling of the test.

The Hexagon Obti test detects whole blood up to a dilution of 1 : 1,000,000. As few as 500 red cells are required for a positive result.