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For in vitro diagnostic use in the quantitative determination of digoxin in serum and plasma (EDTA and lithium heparin) using the ADVIA Centaur® XP systems. Measurements obtained by this device are used in the diagnosis and treatment of digoxin overdose and in monitoring levels of digoxin to ensure appropriate therapy.

The ADVIA Centaur Digoxin assay reagents come in the following configurations: 5 ReadyPack primary reagent packs containing ADVIA Centaur DIG Lite Reagent and Solid Phase, ADVIA Centaur DIG Master Curve card (250 Tests) 1 ReadyPack primary reagent pack containing ADVIA Centaur DIG Lite Reagent and Solid Phase, ADVIA Centaur DIG Master Curve card (50 Tests) The ReadyPack consists of the following: ADVIA Centaur DIG ReadyPack® primary reagent pack; Lite Reagent: 2.5 ml/reagent pack monoclonal mouse anti-digoxin antibody (~26.4 ng/mL) labeled with acridinium ester in protein buffered saline with sodium azide (0.11%) and preservatives. ADVIA Centaur DIG ReadyPack primary reagent pack; Solid Phase Reagent: 12.5 mL/reagent pack digitoxin (~2 ng/mL) covalently coupled to paramagnetic particles in protein buffered saline with sodium azide (0.11%) and preservatives.

Immunoassay for the in vitro quantitative determination of digoxin in human serum and plasma. Measurements are used in the diagnosis and treatment of digoxin overlose and in monitoring levels of digoxin to ensure proper therapy. The electrochemiluminescence immunoassay "ECLIA" is intended for use on Elecsys and cobas e immunoassay analyzers.

The Elecsys Digoxin assay employs a competitive test principle using a monoclonal antibody specifically directed against digoxin. Digoxin in the sample competes with the added digoxin derivative labeled with biotin for the binding sites on the ruthenylated antibody-complex. Results are determined via a calibration curve which is instrument- specifically generated by 2point calibration and a master curve provided via the reagent barcode. The reagent working solutions include: RackPack (kit placed on instrument) M: Streptavidin-coated microparticles, R1: Anti digoxin Ab~Ru(bpy) 3+ and R2: Digoxin-derivative~biotin. PreciControl Cardiac II is a lyophilized control serum based on human serum in two concentration ranges. The controls are used for monitoring the accuracy and precision of the Elecsys CK MB, CK MB STAT, Myoglobin, Myoglobin STAT, proBNP II, proBNP II STAT, and Digoxin immunoassays.

The Randox Laboratories Digoxin Assay is an in vitro diagnostic test for the quantitative determination of Digoxin in human serum or plasma. Quantitative measurements are used in the diagnosis and treatment of Digoxin overdose and in monitoring levels of Digoxin to ensure appropriate therapy. This device has been developed for the ADVIA system and is intended for prescription use only.

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The DIGXN method is an in vitro diagnostic test for the quantitative measurement of digoxin in human serum and plasma on the Dimension Vista® System. Measurements of digoxin are used in the diagnosis and treatment of digoxin overdose and in monitoring levels of digoxin to help ensure appropriate therapy. The DRUG 4 CAL is an in vitro diagnostic product for the calibration of the LOCI Digoxin (DIGXN) method on the Dimension Vista® System.

Method: The DIGXN method is a homogeneous, sequential, chemiluminescent immunoassay based on LOCI® technology. The LOCI® reagents include two synthetic bead reagents and a biotinylated F(ab')2 fragment of an anti-Digoxin mouse monoclonal antibody. The first bead reagent (Chemibeads) is coated with ouabain, a weaker binding analog of digoxin, and contains a photosensitizer dye. In a first step, sample is incubated with biotinylated F(ab')> which allows digoxin from the sample to saturate a fraction of the biotinylated F(ab')2 that is directly related to the digoxin concentration. In a second step, ouabain chemibeads are added and form bead/biotinylated F(ab')> immunocomplexes with the non-saturated fraction of the biotinylated F(ab')>. Sensibeads are then added and bind to the biotin to form bead pair immunocomplexes. Illumination of the complex at 680 nm generates singlet oxygen from Sensibeads which diffuses into the Chemibeads, triggering a chemilyminescent reaction. The resulting signal is measured at 612 nm and is an inverse function of the digoxin concentration in the sample. Calibrator: The DRUG 4 Calibrator is a 5 level, liquid calibrator. It is packaged as a kit of ten vials, two vials per level (A, B, C, D and E), 2.5 mL per vial. The product matrix is human serum.

The ARCHITECT iDigoxin assay is an in vitro chemiluminescent microparticle immunoassay (CMIA) for the quantitative measurement of digoxin in human serum or plasma on the ARCHITECT i System with STAT protocol capability. The measurements obtained are used to aid in the diagnosis and treatment of digoxin overdose and in monitoring levels of digoxin to help ensure appropriate therapy. The ARCHITECT iDigoxin Calibrators are for the calibration of the ARCHITECT i System with STAT protocol capability when used for the quantitative determination of digoxin in human serum or plasma. For in vitro diagnostic use.

The ARCHITECT iDigoxin assay is a one-step STAT immunoassay for the quantitative measurement of digoxin in human serum or plasma using CMIA technology with flexible assay protocols, referred to as Chemiflex. Sample, antidigoxin coated paramagnetic microparticles, assay diluent, and digoxiqenin acridinium-labeled conjugate are combined to create a reaction mixture. The antidigoxin coated microparticles bind to digoxin present in the sample and to the digoxigenin acridinium-labeled conjugate. After washing, pre-trigger solutions are added to the reaction mixture. The resulting chemiluminescent reaction is measured as relative light units (RLUs). An indirect relationship exists between the amount of digoxin in the sample and the RLUs detected by the ARCHITECT i System optics.

The AxSYM Digoxin III assay is a microparticle enzyme immunoassay (MEIA) for the quantitative measurement of digoxin, a cardiovascular drug, in serum or plasma. The measurements obtained are used in the treatment of digoxin overdose and in monitoring levels of digoxin to ensure appropriate therapy.

The AxSYM Digoxin III Reagent Pack is composed of the following reagent components: • Digoxin: Alkaline Phosphatase Conjugate • Anti-digoxin (Rabbit) Coated Microparticles • MEIA Buffer • Digoxin III Probe Wash Solution The AxSYM Digoxin III Calibrators contain six bottles of accurately measured amounts of digoxin prepared in recalcified human plasma, nonreactive for HBsAg, HIV-1 RNA or HIV-1 Ag, anti-HCV, and anti-HIV-1/HIV-2. The AxSYM Digoxin III Controls contain three bottles of accurately measured amounts of digoxin prepared in recalcified human plasma, nonreactive for HBsAg, HIV-1 RNA or HIV-1 Ag, anti-HCV, and anti-HIV-1/HIV-2.

The ADVIA IMS® Digoxin method is for in vitro diagnostic use to quantitatively measure digoxin, a cardioactive drug, in human serum. Measurements obtained are used as an aid in the diagnosis of digoxin overdose and in monitoring therapeutic levels of digoxin to ensure appropriate therapy.

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The SERADYN OMS™ DIGOXIN assay is used for the quantitation of digoxin in human serum or plasma on the Abbott AEROSET® System. Digoxin is a potent cardiac glycoside widely prescribed for the treatment of patients suffering from congestive heart failure, as well as some types of cardiac arrhythmias. Digoxin intoxication is a common and serious problem in the clinical setting. This is, in part, a result of the fact that cardiac glycosides have a low therapeutic ratio (a very small difference between therapeutic and tissue toxic levels). Coupled with the narrow therapeutic range is a marked patient variability in response to the same dosage of drug, often resulting in unpredictable serum drug levels. Intoxication symptoms are often indistinguishable from the original condition for which the drug was prescribed. It may not be immediately apparent whether the patient has been under or overdosed. Monitoring serum digoxin levels combined with other clinical data can provide the physician with useful information to aid in adjusting patient dosage and achieving optimal therapeutic effect while avoiding useless sub-therapeutic or harmful toxic dosage levels.

The Seradyn QMS™ Digoxin Assay is a homogeneous Particle Enhanced Turbidimetric Immunoassay used for the quantitation of digoxin in serum or plasma. The assay is intended for use on the Abbott AEROSET® System, using the Seradyn QMS Digoxin Calibrators (previously cleared as Digoxin Immunoassay K983323. The reagent system components are 1) digoxin coated microparticle reagent, and 2) the antibody reagent which consists of a mouse monoclonal antibody specific for digoxin. The technology is based on competition between the digoxin in the sample and digoxin coated onto the microparticles, for the antibody-binding sites of the anti-digoxin antibody reagent. In the absence of digoxin in the sample, the specific antibody in the antibody reagent binds the digoxin on the particle, and results in rapid agglutination of the microparticles. In the presence of digoxin in the sample, the digoxin in the sample competes for antibody binding sites of the specific antibody in the antibody reagent, and partially inhibits the agglutination of the microparticles. The rate of agglutination (turbidity) is directly proportional to the rate in absorbance change of incident light and is measured spectrophotometrically by the Abbott AEROSET® System at a wavelength of 700 nm. A six level Seradyn QMS™ Digoxin Calibrator set, with known digoxin concentrations is used to quantitate the assay. An internal concentration-dependent calibration curve is generated by the AEROSET® System, by measuring the rate of absorbance change of each calibrator level. Maximum absorbance rate is at the lowest digoxin concentration and the lowest absorbance rate at the highest digoxin concentration. By monitoring the change in rate of a specimen with unknown digoxin concentration, and comparing to the internal calibration curve, a sample's concentration can readily be obtained and reported as digoxin concentration in either ng/ml or nmol/L.

The IMMULITE® 2000 Digoxin assay is for in vitro diagnostic use with the IMMULITE® 2000 Analyzer -- for the quantitative measurement of digoxin in serum or heparinized plasma, as an aid in monitoring the therapeutic administration of this cardioglycoside, while avoiding toxicity.

IMMULITE® 2000 Digoxin is a solid phase, chemiluminescent enzyme-labeled competitive immunoassay for use with the IMMULITE® 2000 Automated Analyzer. The solid phase is a polystyrene bead coated with a monoclonal murine anti-digoxin antibody. The patient sample and alkaline phosphatase-conjugated digoxin are simultaneously introduced into the Reaction Tube containing the bead, and incubated for approximately 30 minutes at 37 degrees C with intermittent agitation. During this time, digoxin in the sample competes with the enzyme-fairched digoxin for a limited number of antibody binding sites on the bead. Unbound enzyme conjugate is then removed by a centrifugal wash, after which substrate is added and the Reaction Tube is incubated for a further 5 minutes. The chemiluminescent substrate, a phosphate ester of adamantyl dioxetane, undergoes hydrolysis in the presence of alkaline phosphatase to yield an unstable intermediate. The continuous production of this intermediate results in the sustained emission of light, thus improving precision by providing a window for multiple readings. The bound complex - and thus also the photon output, as measured by the luminometer - is inversely proportional to the concentration of digoxin in the sample.