Abstract:
New and improved connector is provided for the zero dead volume connection of separate, like diameter flexible tubing lengths by direct tubing length end abutment and connection under controlled conditions. The connector is particularly adapted for use with tubing lengths of fluorocarbon or like materials in contemporary biomedical sample liquid analysis systems which utilize an immiscible isolation liquid or "oil" to minimize sample liquid carryover and maximize the accuracy of sample liquid analysis results.
Abstract:
New and improved, liquid level adjusting and filtering device is provided, and is operable upon insertion into a container to automatically adjust the level of a liquid as contained in the container to a predetermined, precisely repeatable location, and to filter the thusly level-adjusted liquid. The device is particularly adapted for use in conjunction with test tube-like devices, in the nature of those marketed under the Trademark "Vacutainer" by the Becton-Dickinson Company of East Rutherford, NJ, containing whole blood samples which have been separated as by centrifugation into respective blood cell, buffy and blood serum layers; and is operable in that context to present blood serum samples to automated sample analysis systems at the same predetermined and precisely repeatable location relative to the aspirating probe means of such systems.
Abstract:
New and improved apparatus and method for thorough, non-invasive mixing of a flowing fluid stream, either continuous or segmented, are provided and, as disclosed, are embodied in a mixing conduit which comprises a plurality of interconnected bends, which may be in the form of arcuate coils or sections, successive arcuate sections being operable to establish secondary flow patterns in differing orientations within the flowing fluid stream, or individual segments thereof. Such arcuate sections may be disposed in a same plane, if formed in serpentine fashion, or in non-parallel, preferably orthogonal planes, if formed in a tortuous fashion. Also, the arcuate sections, or a series thereof may be formed in stacked fashion and located in essentially parallel planes.