Abstract:
A sample handling system for an optical evaluation instrument. A cuvette storage mechanism (10) is provided for storing a plurality of cuvettes (50), each of which has a plurality of reaction wells. A temperature controlled housing (26) is provided for storing a plurality of reagent containers each containing a respective reagent, and a plurality of sample collection tubes, containing a fluid sample and each presenting an optically scannable code identifying the sample and a test to be performed on the sample. A programming station (30) is provided for optically reading the code (32) presented by the respective sample collection tubes for programming the instrument with a test to be performed. A sample insertion station (14) includes a mechanism (36) for aspirating a portion of the sample from a sample collection tube and for dispensing the aspirated sample portion into a reaction well of a cuvette. A first transporter (28) transports the sample collection tubes first to the programming station (30) and then to the sample insertion station (14). A second transporter (12) transports the cuvettes through the sample insertion station (14) and the reagent station (16, 18 and 20) and onto the monitoring means (22).
Abstract:
The detection of bacterial growth or the performance of other interrogative processes in multiple sample vials is accomplished using a moving rack that selectively couples optical locations to an optical excitation/detection system. The apparatus includes a drive mechanism combining agitation of the culture vials with a sequential scanning of an array of optical fibers, preferably by a spectrophotometric excitation/detector system. Selection of each culture vial provides, for example, optical detection of bacterial growth by fluorescence or other spectrophotometric measurements. A rack for holding vials is preferably the only moving assembly, and requires no mechanical or electrical interconnection with the excitation/detection system for its operation. In general, the present invention relates to the optically indexed presentation of the optical guides, e.g., the emission and excitation fibers, to many remote sample sites in the form of a geometric array at the interface between the moving culture vial rack assembly and the spectrophotometric excitation/detection system fixed to the body of the instrument. Methods of transmitting and receiving electromagnetic radiation to and from sample vials held in a movable rack include the steps of coupling the sample vials to an optical fiber and terminating the optical fiber at an optical coupling location. The rack is then moved to align at least one of the coupling locations with an excitation/detection system.
Abstract:
L'invention se rapporte à un dispositif opto-électronique (4), qui sert à mesurer l'absorbance d'un groupe de plusieurs échantillons en utilisant un groupe correspondant de plusieurs paires de phtodiodes et de diodes électroluminescentes. Sont également décrits un kit (3) et un procédé d'utilisation de réactions chimiques modifiées dans des tests "ELISA", qui sont conçus pour être utilisés avec le dispositif opto-électronique mentionné ci-dessus.
Abstract:
An analytic instrument of kinetically measuring light absorption characteristics of a plurality of independent samples contained in disposable test tubes arranged in a circular pattern about a single light source. The instrument is designed to be used with a host personal computer and is not specific to any particular type of assay. The instrument obtains and temporarily stores raw data in the form of digitized output signals from the plurality of photodetectors and periodically passes them to the host computer. An incubator has test tube wells arranged in a circular array equidistant from a single incandescent light source. The circular symmetry controls the termal gradients in the incubator such that all of the samples are disposed on the same isotherm and all of the photodetectors are disposed on the same isotherm. The instrument is designed for use with disposable test tubes, and sources of error arising from optical variation in such test tubes are minimized by providing a separate detector for each tube and by holding the tube fixed with respect to the detector. The lignt output from the single light source is continuously monitored and is kept constant.