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The ARCHITECT iValproic Acid assay is an in vitro chemiluminescent microparticle immunoassay (CMIA) for the quantitative measurement of valproic acid, an anticonvulsant drug, in human serum or plasma on the ARCHITECT i System with STAT protocol capability. The measurements obtained are used in monitoring levels of valproic acid to help ensure appropriate therapy. The ARCHITECT iValproic Acid Calibrators are for the calibration of the ARCHITECT i System with STAT protocol capability when used for the quantitative determination of valproic acid in human serum or plasma.

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

The ONLINE TDM Valproic Acid assay is for the quantitative determination of valproic acid in human serum or plasma on Roche automated clinical chemistry analyzers. Measurements muman serain of paintine were used in the diagnosis and treatement of valproic acid overdose and in monitoring the levels of valproic acid to help ensure appropriate therapy.

The ONLINE TDM Valproic Acid assay is for the quantitative determination of valproic acid in human serum or plasma on Roche automated clinical chemistry analyzers. The proposed labeling indicates the Roche Hitachi 911, 912, 917 and Modular P analyzers can be used with the Roche ONLINE TDM Valproic Acid reagent kits. The assay is based on a homogeneous enzyme immunoassay technique used for the quantitative analysis of valproic acid (free and protein-bound) in human serum or plasma. The assay is based on competition between drug in the sample and drug labeled with the enzyme glucose-6-phosphate dehydrogenase (G6PDH) for antibody binding sites. Enzyme activity decreases upon binding to the antibody, so the drug concentration in the sample can be measured in terms of enzyme activity. Active enzyme converts oxidized nicotinamide adenine dinucleotide (NAD) to NADH, resulting in an absorbance change that is measured spectrophotometrically. Endogenous serum G6PDH does not interfere because the coenzyme functions only with the bacterial (Leuconostoc mesenteroids) enzyme employed in the assay.

This in vitro method is intended to quantitatively measure the antiepileptic drug valproic acid in human serum and plasma on the Bayer ADVIA® IMS systems. Measurements of valproic acid are used to aid in monitoring therapeutic levels of valproic acid to ensure appropriate therapy and in the treatment of valproic acid overdose. The Bayer ADVIA IMS Valproic Acid method is for in vitro diagnostic use to measure the antiepileptic drug valproic acid in human serum and plasma. Measurements of valproic acid (2-propylpentanoic acid) are used as an aid in the diagnosis and treatment of valproic acid overdose, and in monitoring therapeutic levels of valproic acid to ensure appropriate therapy.

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1. For in vitro diagnostic use only. VITROS Chemistry Products VALP Reagent is used on the VITROS 5,1 FS Chemistry System to quantitatively measure valproic acid (VALP) concentration in human serum and plasma. Serum or plasma valproic acid measurements are used in the diagnosis and treatment of valproic acid overdose and in monitoring levels of valproic acid to ensure appropriate therapy. 2. For in vitro diagnostic use only. VITROS Chemistry Products Calibrator Kit 12 is used to calibrate VITROS 5,1 FS Chemistry Systems for the quantitative measurement of valproic acid (VALP). 3. For in vitro diagnostic use only. VITROS TDM Performance Verifier is an assayed control used to monitor performance of ACET, CRBM, DGXN, PHBR, PHYT and VALP on VITROS Chemistry Systems.

The VITROS Chemistry Products VALP Reagent, VITROS Chemistry Products Calibrator Kit 12, and the VITROS Chemistry Products TDM Performance Verifiers are combined by the VITROS 5,1 FS Chemistry System to perform the VITROS VALP assay. VITROS Chemistry Products VALP Reagent is a dual chambered package containing ready-to-use liquid reagents that are used in a two-step reaction to quantitatively measure valproic acid. VITROS Chemistry Products Calibrator Kit 12 and TDM Performance Verifiers are packaged and sold separately. VITROS Chemistry Products Calibrator Kit 12 is a liquid ready to use calibrator set for valproic acid. Each kit contains one bottle each of six (6) levels. The level 1 bottle (zero level) contains 5 milliliters. The level 2 through 6 bottles each contain 2 milliliters. VITROS Chemistry Products TDM Performance Verifier I, II and III are liquid ready to use controls with assaved values published for each lot. The controls are prepared from bovine serum with therapeutic drugs and preservatives added. The product is sold in separate kits of Level I, II and III. Each kit contains 6 vials (2 mL each).

The Roche ONLINE TDM Valproic Acid assay contains an in vitro diagnostic reagent system indicated for the quantitative determination of valproic acid in human serum or plasma on automated clinical chemistry analyzers. Valproic acid is primarily used in the treatment of petit mal seizures and other generalized and partial complex seizures.

The assay is a homogeneous immunoassay based on the principle of measuring changes in scattered light or absorbance which result when activated microparticles aggregate. The microparticles are coated with valproic acid and rapidly aggregate in the presence of a valproic acid antibody solution. When a sample containing valproic acid is introduced, the aggregation reaction is partially inhibited, slowing the rate of the aggregation process. Antibody bound to sample drug is no longer available to promote microparticle aggregation, and subsequent particle lattice formulation is inhibited. Thus, a classic inhibition curve with respect to valproic acid concentration is obtained, with the maximum rate of aggregation at the lowest valproic acid concentration. By monitoring the change in scattered light or absorbance, a concentration-dependent curve is obtained.

Valproic Acid (VPA) Reagent, in conjunction with the SYNCHRON® Systems Drug Calibrator 1 set, is intended for the quantitative determination of valproic acid concentration in human serum or plasma on SYNCHRON Systems. Valproic Acid is an anticonvulsant drug. It is indicated for the treatment of absence (petite mal), generalized tonic-clinic and myoclonic seizures. Valproic Acid therapy is monitored for suspected inadequate dose or toxicity. Valproic Acid Reagent is used to measure the valproic acid concentration by a particle enhanced turbidimetric inhibition immunoassay method.

The SYNCHRON Systems VPA Reagent is designed for optimal performance on the SYNCHRON CX (CX4/4CE/4A/4PRO. CX5/5CE/5A/5PRO, CX7/7RTS/7Δ/7PRO, CX9ALX/9PRO) and SYNCHRON LX (LX20/PRO/LXi) Systems. The reagent kit contains two 100-test cartridges, and is packaged separately from the associated calibrators.

The SERADYN QMS™ / MULTIGENT™ VALPROIC ACID assay is used for the quantitation of valproic acid in human serum or plasma on the Abbott AEROSET® System. Valproic acid is a broad-spectrum anticonvulsant drug used solely or in combination with other anticonvulsant drugs for the treatment of absence seizures. It also has demonstrated effectiveness in the management of generalized tonic-clonic and myoclonic seizures, as well as atypical absence, simple and complex partial and mixed grand mal and petit mal seizures. The capability of treating many types of seizures with a single anticonvulsant has resulted in the wide-spread use of valproic acid, particularly in children in whom tonic-clonic and myclonic seizures are most prevalent. Valproic acid has proven effective in the treatment of many patients otherwise refractory to other anticonvulsant treatments. Most patients receiving valproic acid do not develop a tolerance to its anticonvulsant effects. Monitoring serum valproic acid 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™ / MULTIGENT™ Valproic Acid Assay is a homogeneous Particle Enhanced Turbidimetric Immunoassay used for the quantitation of valproic acid in serum or plasma. The assay is intended for use on the Abbott AEROSET® System, using the Seradyn QMS™ / MULTIGENT™ Valproic Acid Calibrators. The reagent system components are 1) Valproic acid coated microparticle reagent, and 2) the antibody reagent which consists of a mouse monoclonal antibody specific for valproic acid. The technology is based on competition between the valproic acid in the sample and valproic acid coated onto the microparticles, for the antibody-binding sites of the anti-Valproic Acid antibody reagent. In the absence of valproic acid in the sample, the specific antibody in the antibody reagent binds the valoroic acid on the particle, and results in rapid agglutination of the microparticles. In the presence of valproic acid in the sample, the valproic acid 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 604 nm. A six level Seradyn QMS™ / MULTIGENT™ Valproic Acid Calibrator set, with known valproic acid concentrations is used to quantitate the assay. An internal concentrationdependent 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 valproic acid concentration and the lowest absorbance rate at the highest valproic acid concentration. By monitoring the change in rate of a specimen with unknown valproic acid concentration, and comparing to the internal calibration curve, a sample's concentration can readily be obtained and reported as valproic acid concentration in either ug/mL or umol/L.

The Randox Laboratories Ltd. Valproic Acid Test Kit is an in vitro diagnostic reagent for the quantitative determination of valproic acid in serum. The method is a latex-enhanced immunoturbidimetric assay based on the principle of measuring changes in scattered light. inthunotational with valproic acid which, in the presence of valproic acid antibody solution, rapidly agglutinate. When a sample containing valproic acid is introduced the agglutination reaction is partially inhibited, slowing down the agglutination process. The rate of agglutination is inversely dependent on the concentration of valproic acid in the sample. By aggraination the change in scattered light as a change in absorbance, a concentration curve can montoning the onling in absorbance is inversely proportional to the concentration of valbroic acid in the sample. Measurements obtained by this device are used in the diagnosis and treatment of valproic acid wse or overdose and in monitoring levels of valproic acid to ensure appropriate therapy. These Application Sheets have been developed for the Hitachi 717 and Advia 1650 analysers r noo must be used by suitably qualified laboratory personnel under appropriate laboratory conditions.

The Randox Laboratories Ltd. Valproic Acid Test Kit is an in vitro diagnostic reagent for the quantitative determination of valproic acid in serum. The method is a latex-enhanced immunoturbidimetric assay based on the principle of measuring changes in scattered light. inthunotational with valproic acid which, in the presence of valproic acid antibody solution, rapidly agglutinate. When a sample containing valproic acid is introduced the agglutination reaction is partially inhibited, slowing down the agglutination process. The rate of agglutination is inversely dependent on the concentration of valproic acid in the sample. By aggraination the change in scattered light as a change in absorbance, a concentration curve can montoning the onling in absorbance is inversely proportional to the concentration of valbroic acid in the sample.

The Emit® 2000 Valproic Acid Assay is a homogeneous enzyme immunoassay intended for use in the quantitative analysis of valproic acid in human serum or plasma. Measurements obtained from this device are used in the diagnosis and treatment of valproic acid overdose or in monitoring levels of valproic acid to ensure appropriate therapy. These reagents are packaged specifically for use on a variety of OLYMPUS® analyzers.

The modified assay is similar to the predicate device with minor differences in the packaging of the product. The modified assay has a smaller fill volume of the reagents into different shaped (wedge) reagent bottles. Both the predicate and modified device reagent bottles are made of the same material (HDPE). The modified reagent bottles incorporate a barcode label with assay specific information and are compatible with the OLYMPUS® AU400/600™, AU800/1000™ and AU2700™ Series Analyzers.