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The SPOTCHECK Neonatal GALT Microplate Reagent Kit is for the quantitative determination of galactose-1-phosphate uridyltransferase, EC 2.7.7.12 (GALT), activity in whole blood saturated filter paper disks, using a microplate absorbance reader. Measurements of GALT enzyme activity are used primarily in the diagnosis and treatment of the hereditary disease galactosemia. This method is intended for in vitro diagnostic use as an aid in neonatal screening for decreased levels of GALT enzyme activity, and not for monitoring purposes. The SPOTCHECK Pro is used for automated sample processing in the application of in vitro diagnostic assays. Specimens containing patient bodily substances are introduced and analyzed in microtiter plates using qualitative/quantitative determination through absorbance measurements. These devices are intended for use by trained, qualified laboratory personnel.

SPOTCHECK Neonatal GALT Microplate Reagent Kit - 60 Plate: Four enzyme mediated reactions are employed in the determination of GALT activity. GALT activity is determined by measuring the colored formazan produced by the addition of the color reagent to the incubated blood/substrate mixture. Patient samples of whole blood collected on standardized filter paper are placed into the wells of a standard 96 well microplate. A buffered enzyme mixture is added to each well and the plate is incubated at 37 °C for 120 minutes on a plate shaker/incubator. Following incubation, an aliquot of the mixture from each well is transferred to the corresponding wells on a clean 96 well microplate. Color reagent is added to each well, the color is developed over the course of 10 minutes, and the absorbance of each sample is determined on the plate reader. A blank absorbance reading is made prior to the addition of the color reagent to correct for endogenous sample color. The color developed is proportional (1:1) to the GALT activity in the sample. A standard curve prepared from a stock NADH solution is used to quantitate the results. Results are expressed as units of GALT enzyme activity per gram of hemoglobin or U/g Hb. SPOTCHECK Pro: INSTRUMENT COMPONENTS: Tecan Freedom EVO and accessories necessary for assay.

The devices described herein are intended to be used with Astoria-Pacific's SPOTCHECK family of neonatal screening reagent kits. Assays currently offered on the system included Uridyltransferase (GALT), Biotinidase**, Total Galactose, Phenylalanine, G6PD, and Tyrosine. They are intended for use by qualified clinical laboratory professionals. ** Astoria-Pacific is not currently seeking FDA-clearance for Biotinidase on the SPOTCHECK Flow. The SPOTCHECK Flow system is used for in vitro diagnostic newborn screening in conjunction with Astoria-Pacific's SPOTCHECK family of reagent kits. The specific inborn errors in metabolism screened for (bold), and the respective Astoria-Pacific dried blood spot assays are: - Galactose-1-phosphate uridyltransferase (GALT) enzyme deficiency (Galactosemia); SPOTCHECK UridyItransferase 50 Hour Reagent Kit - Galactose and galactose-1-phosphate, elevated total galactose concentration (Galactosemia); SPOTCHECK Total Galactose 50 Hour Reagent Kit - Phenylalanine, elevated concentration (Phenylketonuria); SPOTCHECK Phenylalanine 50 Hour Reagent Kit - Glucose-6-phosphate dehydrogenase enzyme deficiency; SPOTCHECK G6PD 50 Hour Reagent Kit - Tyrosine, elevated concentration (Tyrosinemia); SPOTCHECK Tyrosine 50 Hour Reagent Kit The system is intended for screening use only and is not intended for monitoring purposes. The SPOTCHECK Analyzer system is used for in vitro diagnostic newborn screening in conjunction with Astoria-Pacific's SPOTCHECK family of reagent kits. The specific inborn errors in metabolism screened for (bold), and the respective Astoria-Pacific dried blood spot assays are: - Galactose-1-phosphate uridyltransferase (GALT) enzyme deficiency (Galactosemia); SPOTCHECK UridyItransferase 50 Hour Reagent Kit - Biotinidase enzyme deficiency; SPOTCHECK Biotinidase 50 Hour Reagent Kit - Galactose and galactose-1-phosphate, elevated total galactose concentration (Galactosemia); SPOTCHECK Total Galactose 50 Hour Reagent Kit - Phenylalanine, elevated concentration (Phenvlketonuria); SPOTCHECK Phenylalanine 50 Hour Reagent Kit - Glucose-6-phosphate dehydrogenase enzyme deficiency; SPOTCHECK G6PD 50 Hour Reagent Kit - Tyrosine, elevated concentration (Tyrosinemia); SPOTCHECK Tyrosine 50 Hour Reagent Kit The system is intended for screening use only and is not intended for monitoring purposes. The SPOTCHECK Analyzer system is used for in vitro diagnostic newborn screening in conjunction with Astoria-Pacific's SPOTCHECK family of reagent kits. The specific inborn error in metabolism screened for (bold), and the respective Astoria-Pacific dried blood spot assay are: - Biotinidase enzyme deficiency; SPOTCHECK Biotinidase 50 Hour Reagent Kit The system is intended for screening use only and is not intended for monitoring purposes. The SPOTCHECK Analyzer system is used for in vitro diagnostic newborn screening in conjunction with Astoria-Pacific's SPOTCHECK family of reagent kits. The specific inborn errors in metabolism screened for (bold), and the respective Astoria-Pacific dried blood spot assays are: - Galactose-1-phosphate uridyltransferase (GALT) enzyme deficiency (Galactosemia); SPOTCHECK UridyItransferase 50 Hour Reagent Kit - Galactose and galactose-1-phosphate, elevated total galactose concentration (Galactosemia); SPOTCHECK Total Galactose 50 Hour Reagent Kit - Phenylalanine, elevated concentration (Phenviketonuria); SPOTCHECK Phenylalanine 50 Hour Reagent Kit - Glucose-6-phosphate dehydrogenase enzyme deficiency; SPOTCHECK G6PD 50 Hour Reagent Kit - Tyrosine, elevated concentration (Tyrosinemia); SPOTCHECK Tyrosine 50 Hour Reagent Kit The system is intended for screening use only and is not intended for monitoring purposes.

The SPOTCHECK continuous flow analyzer consists of various devices that interact together to provide a complete in vitro diagnostic (IVD) instrument system for use with Astoria-Pacific's neonatal screening assays. The technology can be considered automated bench chemistry in which continuously flowing reagents are mixed with the sample, ultimately producing a detectable product that correlates to analyte concentration. Proper conditions for reactions are controlled by using a variety of techniques such as specific timing for reagent inputs, incubation at specific temperatures, and/or dialysis. Depending upon the particular IVD assay, system components may differ slightly. In each case however, a system consists of an autosampler, a pump for reagents and sample streams, a module where assay chemistry occurs, a detector (including flowcell), and an interface unit that facilitates communication with the software. The proposed modifications to the analyzer system components allow for 2 new unique system options; they are as follows: - 1. 350D Interface Unit: The predicate interface unit used for communications between detectors and software has been updated to accommodate the new software*. OR - 2. 307 Digital Photometer/Fluorometer: A new detector has been developed as an alternative to using the interface unit and predicate fluorometric detector. It is intended to be used with the new software*. AND *NeoPac: A new software package has been developed to replace outdated software. The 2 options listed above both depend on this software to complete the system. Each new or modified component is briefly described below: NeoPac Software: NeoPac is a newly developed software package designed to replace Astoria-Pacific's predicate software package. It is intended for use with new components and Microsoft® operating systems currently on the market. The software facilitates similar instrument controls as the predicate package, while adding minor but important functionality. 350D Interface Unit: The 350D facilitates electronic communication between NeoPac software and the detector(s), autosampler and pump. Each unit has 7 analog detector inputs on the front panel, a power cord connection, and cable connections for a PC, autosampler and pump. Its sole purpose is to provide a mechanism for commands and data to flow to and from the software and system components. The 350D is modified from the predicate device (350 Interface Unit) in order to communicate with new software. 307 Digital Photometer/Fluorometer: The 307 detector is a newly developed detection platform intended to provide an alternative option to the interface unit and one or more detectors in the SPOTCHECK analyzer system. Aside from providing a state-of-the-art option for detection, its spatial requirements are significantly less than the predicate device. It can be manufactured with up to 4 unique photometric or fluorometric detection channels and an additional analog input (offering the ability to connect to a standalone detector). In conjunction with NeoPac software, it facilitates the communication of data and commands between a PC, autosampler and pump. The 307 consists of a base module with up to 4 detection channels (not including a reference channel); each channel is either a fluorometer module or a photometric subassembly. The fluorometer module is a removable device that contains a flowcell, excitation LED, and emission bandpass filter. Each fluorometer module is manufactured according to the specifications of the assay it is intended to be used with. The photometric subassembly is not removable by the user. The only significant differences between the 307 and the predicate detectors (321 and 315) are the use of LEDs for excitation (fluorometry) and a bandpass filter instead of a monochromator (photometry).

The GSP Neonatal GALT kit is intended for the quantitative determination of r ne Sose - 1-phosphate uridyl transferase (GALT) activity in blood specimens dried on filter paper as an aid in screening newborns for classical galactosemia caused by GALT deficiency using the GSP™ instrument.

The GSPTM Neonatal GALT assay is an adaptation of the quantitative enzymatic assay of Beutler and Baluda. The fluorescence is measured with the GSP Instrument using an excitation wavelength of 355 nm and an emission wavelength of 460 nm. The GSP Neonatal GALT assay uses prompt fluorescence technology.

This assay is for the qualitative determination of galactose-1-phosphate uridyl transferase activity in dried blood spot samples using the Bio-Rad CODA Analyzer. Measurements of GALT are used in the diagnosis and treatment of the hereditary disease galactosemia (disorder of galactose metabolism) in infants. For in vitro diagnostic use only.

The CODA GALT assay utilizes dried blood spot samples (DBS) eluted in a medium containing B-nicotinamide adenine dinucleotide phosphate (NADP), galactose-1-phosphate, uridine-5diphosphoglucose (UDPG), and a tetrazolium salt. During the manual elution step, GALT present in the specimen converts galactose-1-phosphate to glucose-1-phosphate, with the eventual reduction of NADP to NADPH. After elution, the samples are placed on the CODA instrument and an aliquot of the eluate is transferred to a microwell. The optical density (OD) is read, then Enzyme Reagent is added. During the incubation that follows, the Enzyme Reagent converts NADPH generated by GALT and endogenous red cell enzymes to NADP, and the tetrazolium salt to a colored formazan dye which is detected at 570 nm. The OD is read again and the difference between the two OD readings is determined. GALT activity, in units/g hemoglobin or units/liter blood, is calculated from the difference in signal between the two absorbance readings. A unit is defined as the quantity of GALT that catalyzes the formation of 1 micromole of UDP galactose per gram of hemoglobin or per Liter blood per hour at 37℃. An external calibrator is not necessary because enzyme activity is measured directly with substrates in excess. The CODA instrument is an integrated immunoassay analyzer intended for the automation of microplate based assays for in vitro diagnostic use.

This assay is for the qualitative determination of galactose-1-phosphate uridyl transferase (GALT) activity in dried blood spot samples. Measurements of GALT are used in the diagnosis and treatment of the hereditary disease galactosemia (disorder of galactose metabolism) in infants. For in vitro diagnostic use only.

The Microplate Neonatal GALT assay utilizes dried blood spot samples (DBS) eluted in a medium containing 8-nicitinamide adenine dinucleotide phosphate (NADP), galactose-1phosphate, uridine-5-diphosphoglucose (UDPG), and a tetrazolium salt. During elution, GALT present in the specimen converts galactose-1-phosphate to glucose-1-phosphate, with the eventual reduction of NADP to NADPH. After elution, an aliquot of the eluate is transferred to a microwell. The optical density (OD) is read, then Enzyme Reagent is added. During the incubation that follows, the Enzyme Reagent converts NADPH generated by GALT and endogenous red cell enzymes to NADP, and the tetrazolium salt to a colored formazan dye which is detected at 550 or 570 nm. The OD is read again and the difference between the two OD readings is determined. GALT activity, in units/g hemoglobin or units/liter blood, is calculated from the difference in signal between the two absorbance readings. A unit is defined as the quantity of GALT that catalyzes the formation of 1 micromole of UDP galactose per gram of hemoglobin or per Liter blood per hour at 37℃. An external calibrator is not necessary because enzyme activity is measured directly with substrates in excess.

This Astoria-Pacific SPOTCHECK® Undyttransferase 50-Hour Reagent Kit is for the qualifative determination of galactose-1-phosphate uridyttransferase, EC 2.7.12 (GALT) activity in whole blood saturated filter paper disks (S&S 903 filter paper or equivalent), using the API™ 300 SPOTCHECK® Analyzer or the RFA-300 System. Measurements of galactose-1-phosphate undyttransferase are used in the diagnosis and treatment of the hereditary disease galactosemia. This method is intended for in vitro diagnostic use as an aid in screening for decreased levels of GALT activity in infants. This method is not for monitoring purposes.

The proposed device, Unidyttransferase 50-Hour Reagent Kit, is a set of reagents to be used with the API™ 300 SPOTCHECK® Analyzer or the RFA-300 System for the quantitative determination of the enzyme galactose-1-phosphate uridyttransferase (UT) in whole blood saturated filter paper disks. The amount of unidyltransferase activity is determined by measuring the fluorescent compound produced in the reaction of UT with galactose and UDP Glucose, followed by NADP reduction at 37°C. The excitation wavelength of the reaction product is 450 nm, and it's emission is measured at 550 nm. The method is specific for uridy transferase. The method is designed for mass screening, with enough reagents in each 50-Hour Reagent Kit for 1 week plus start-up (50 hours total) of run time. It is packaged to reduce space and to require a minimum of time to prepare. Each component is packaged with the correct weight to prepare the required volume of reagent. The standard is in a concentrated form, to permit easy dikition to prepare a standard curve.