摘要:
An automated chemical or biological sample analyzer includes a plurality of linear sample carrying racks that are moved to a processing station for conducting an analysis using one or more carousel devices. Under computer control, rotational movements of the carousel or carousels, linear movements of the transfer or shuttle mechanisms, and operation of a pipetting station are performed in a coordinated fashion so as to handle the processing of a large number of samples simultaneously in an optimized fashion that allows random ordering of samples for processing.
摘要:
A pipetting station having a bottom sensing device is provided in conjunction with one of any known liquid level sensing devices. The bottom sensing device includes a pipetting probe spring mounted to a pipetting arm of the pipetting station. The bottom sensing device also includes a sensor for determining when a pipetting tip of the pipetting probe is in contact with a bottom of a tube. The bottom sensing device permits the pipetting probe to measure an exact volume of fluid in the tube by allowing the pipetting tip to be lowered to the bottom of the tube beyond the sensed fluid level.
摘要:
A centrifuge vessel (10) for performing automated immunoassays is disclosed. The centrifuge vessel (10) comprises a center tube (11) and an outer waste chamber (15). A biomaterial (18) is held within the center tube (11) and is capable of binding specific analytes in test samples. In operation, the centrifuge vessel (10) is rotated at high speed about its longitudinal axis, thereby causing all fluid within the center tube (11) to be transported into the outer waste chamber (15) while the analyte of interest remains bound to the biomaterial (18) positioned within the center tube (11).
摘要:
A method for conducting immunoassays in an automated fashion is disclosed. A biological fluid under test is placed in a tube (11) which has a solid support (18) therein to which a specific analyte in the biological fluid will be selectively bound. After the analyte in the biological fluid is bound to the solid support (18), the tube (11) is rotated at high speed about its longitudinal axis causing the biological fluid to be transported up the inside walls of tube (11), over the open terminal end (16), and into waste chamber (15). The solid support (18) with the bound analyte may easily be washed by flushing the inside of tube (11) with water or other suitable fluids and rotating the tube (11) at high speed about its longitudinal axis.
摘要:
A method for conducting immunoassays in an automated fashion is disclosed. A biological fluid under test is placed in a tube (11) which has a solid support (18) therein to which a specific analyte in the biological fluid will be selectively bound. After the analyte in the biological fluid is bound to the solid support (18), the tube (11) is rotated at high speed about its longitudinal axis causing the biological fluid to be transported up the inside walls of tube (11), over the open terminal end (16), and into waste chamber (15). The solid support (18) with the bound analyte may easily be washed byl flushing the inside of tube (11) with water or other suitable fluids and rotating the tube (11) at high speed about its longitudinal axis.
摘要:
Disclosed is a uniquely simple, multiple use apparatus for the packaging of fluids, such as those reference fluids used for the calibration and standardization of blood gas instrumentation, which must not be exposed to air.
摘要:
This invention relates to a method for the removal of heparin from heparin-containing plasma test samples using an insoluble protamine reaction product, without adversely affecting subsequent testing of the plasma for clotting time. Protamine sulfate or a combination of protamine sulfate and serum albumin is cross-linked with glutaraldehyde to form an insoluble reaction product which is capable of adsorbing heparin. According to the method of this invention, excess amounts of either of the cross-linked protamine reaction products are added to blood plasma samples containing heparin and the mixture is agitated for a time sufficient to permit adsorption of substantially all heparin present. The insoluble protamine heparin complex formed is removed from the plasma along with any excess insoluble protamine reaction product. Aliquots of the heparin-free plasma may be subjected to coagulation tests in order to determine true clotting time.
摘要:
The specific disclosure provides a device and method of making an incision of precise dimensions in a patient, preferably in the forearm, and determining exact bleeding from initial puncture of the skin until the flow of blood has ceased, i.e. hemostatis is complete. The device comprises a housing including a blade aperture at one end thereof adapted to be positioned in abutting engagement with the skin of the subject. A spring member and a blade member having at least one cutting edge are located in the housing. Means are also provided in the housing and is connected to the blade member for retracting the blade member inwardly from the blade aperture and against the bias of the spring member. Manually operable means are provided for releasably engaging the retracting means to maintain the blade member in a retracted position against the bias of the spring member until the device is ready for use. The engaging means is manually operable to irretrievably disengage the retracting means, thereby permitting the retracting means and the blade member to move under the bias of the spring member to position the at least one cutting edge a predetermined distance outwardly from the blade aperture.