Patent ID: 7850917

Claim:
A probe tip for performing a visually detectable agglutination reaction after aspiration of reagents and sample therein, said probe tip comprising: a) a first port configured to permit application of negative or positive pressure to an internal volume of said probe tip; b) a sample cavity of said internal volume in fluid communication with said first port; c) at least one flanking cavity of said internal volume disposed outwardly radial of said sample cavity and having a primary axis disposed at an acute angle relative to a vertical center axis of said probe tip, said at least one flanking cavity being shaped to capture particles in the sample after separation of the particles from the remainder of the sample, wherein said at least one flanking cavity is in fluid communication with said sample cavity; d) a detection cavity of said internal volume configured for the detection of agglutinated particles within the sample, wherein said detection cavity is in fluid connection with said sample cavity; e) a transition zone of said internal volume disposed between said sample cavity and said detection cavity, said transition zone being configured for rotational mixing of the sample moving back and forth through said transition zone between said detection cavity and said sample cavity through agitation thereof; and f) a second port in fluid connection with said detection cavity, said second port being configured to permit reagents and sample to be aspirated into or dispensed from said internal volume of said probe tip.