Access Theophylline Immunoassay Reagents
by Bio-Rad Laboratories, Inc. 510(k)
Active
510(k) K922823
Regulatory status
| Region | Authorization | Number | Date | Status |
|---|---|---|---|---|
| United States | FDA 510(k)SESE | NumberK922823 | Date5 Aug 1992 | StatusActive |
Coverage
- Active
- Expiring
- Withdrawn
- Listed
- Not covered
United States — FDA 510(k) Active
Recalls
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- Terminated Z-0309-2018
- Terminated Z-0308-2018
Potential for minor skin burn if the tool contacts the reagent storage interface board (B79917) when performing a pipettor alignment.
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- Terminated Z-1711-2017
- Terminated Z-1710-2017
- Terminated Z-1709-2017
Beckman Coulter is recalling the Access 2 Family of Immunoassay Systems because a circuit board that controls motor functions can affect device positioning on the pipettor and incubator belt while the instrument is running. The position errors cause the instrument to stop running and cancel tests that are in process.
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- Terminated Z-1956-2016
Due to the lack of updated thermal components, these instruments may be more susceptible to the internal case temperature exceeding the 18 to 36 degrees Celsius operating range, causing SYS flags. The instrument will not report results until the internal case temperature returns to the operating range. This situation may cause a delay in the reporting of patient results.
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- Terminated Z-0984-2014
The Access 2 Immunoassay System Analyzer and the UniCel DxI 600 Access may have been manufactured with non-conforming bushings. Non-conforming bushings have a remote probability of generating incorrect results.
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- Terminated Z-0291-2014
Beckman Coulter is recalling the Access 2 Immunoassay System because they determined that the fuses in the system may be of the wrong amperage.
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- Terminated Z-1032-2013
Beckman Coulter is initiating a recall due to a defective newly released aluminum incubator belt pulley that may rub against the light shield, which causes the formation of debris. Debris that is caused by the incubator belt pulley rubbing against the light shield can fall into the reaction vessels (RVs) and present a risk of erroneous test results.
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- Terminated Z-0612-2013
It has been determined that, in some cases, pulley drive components have broken parts or have become loose, mispositioned, or disconnected from their drive shafts. When these defects occur, the pulley may not turn at all, or may turn at an incorrect speed, resulting in inadequate washing or mixing of the contents of the reaction vessel.
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- Terminated Z-3126-2011
The recall was initiated because certain Access immunoassays can produce inaccurate results when performed within the published UniCel DxI Immunoassay Systems* room temperature operating specification of 18 degrees C to 32 degrees C (64.4 degrees F to 89.6 degrees F). An increase in room temperature causes assay results for some assays to decrease, while results for other assays increase with an i
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- Terminated Z-0607-2011
This recall was initiated because Beckman Coulter has received reports of erroneous test results being reported as a result of assay reagent packs being transferred between systems. Erroneous results will be generated as a result of missing or incorrect assay reagents. In these cases both false positive and false negative results are possible, depending upon the assay configuration.
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- Terminated Z-1372-2012
The recall was initiated because Beckman confirmed a customer report that a timing conflict can occur while aspirating samples for the Access Total BhCG assay.
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- Terminated Z-2384-2008
The field action was initiated after the firm confirmed reports of premature failure of the waste pump tubing in the Access and Access 2 Immunoassay Systems. Premature failure of the waste pump tubing may negatively affect precision.
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- Terminated Z-1183-2008
Electrical grounding failure: During manufacturing, internal testing found one instrument wlth an intermittent failure of the electrical grounding. The source of the problem was traced to inadequate soldering.
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- Terminated Z-0265-05
A rare condition of the Access 2 Immunoassay Systems software versions 2.0, 2.1 and 2.2 could present a risk of an erroneous confirmatory result under a specific set of circumstances. The Chlamydia Blocking results may be affected. The instrument will erroneously perform the blocking calculation on the affected test by using the mean of the diluted and neat results.
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- Terminated Z-1148-03
Defective software media distributed with upgrade software may cause installation failure and systems lock.
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- Terminated Z-0692-03
False results from secondary pour off tubes
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- Terminated Z-0619-03
Spring failure, design defect in component.
Specification
- 510(k) Number
- FDA Product Code
- CGN
- Device Class
- Class II
- Regulation
- 21 CFR Part 862.1295
- Advisory Committee
- Clinical Chemistry
- FDA Decision
- SESE Substantially Equivalent
Overview
AI-generated summary, 20 Sep 2026
The Access Theophylline Immunoassay Reagents are an immunoassay system designed for the quantitative measurement of theophylline in serum or plasma. This device falls under the category of immunoassay reagents, utilising immunochemical techniques to detect and quantify theophylline levels, a medication used to treat respiratory conditions such as asthma and chronic obstructive pulmonary disease (COPD).
These reagents are intended for use in clinical chemistry laboratories, typically within automated immunoassay analysers. They are supplied as a kit containing all necessary components for performing the assay, including reagents, controls, and calibration standards. The device is classified as a Class II medical device under FDA regulations (21 CFR 862.1295) and holds a Traditional 510(k) clearance (K922823) from the FDA, dated August 5, 1992. The reagents are not described as sterile or single-use in the provided data.
From the manufacturer
Cutting-Edge Products to Advance Life Science Research Whether you are advancing novel therapeutics, developing revolutionary medical devices, or transforming our understanding of the environment, Bio-Rad has the consumables, reagents, and instruments you need to advance your research.
Other devices from Bio-Rad Laboratories, Inc.
Questions
AI-generated answers, 20 Sep 2026
What clinical setting or type of laboratory is this immunoassay reagent designed for use in?
The Access Theophylline Immunoassay Reagents are specifically designed for use in clinical chemistry laboratories, particularly those equipped with automated immunoassay analyzers. This system is intended for quantitative measurement of theophylline levels in serum or plasma samples, making it suitable for monitoring patients with respiratory conditions like asthma or COPD who are on theophylline therapy.
How is this reagent system supplied, and what components are included in the kit?
The Access Theophylline Immunoassay Reagents are supplied as a complete kit, containing all necessary components for performing the assay. This includes reagents, calibration standards, and controls required to run the immunoassay on an automated analyzer. The kit is designed to streamline the testing process in clinical chemistry labs.
Is this reagent system intended for single-use or can it be reused across multiple tests?
The provided data does not explicitly state whether the reagents are single-use or reusable. However, immunoassay reagents like these are typically designed for multiple tests within the kit’s shelf life, provided they are stored and handled according to manufacturer guidelines. Always refer to the manufacturer’s instructions for specific usage details.
What regulatory pathway was followed for this device’s clearance, and what does that mean for its use?
The Access Theophylline Immunoassay Reagents received a Traditional 510(k) clearance (K922823) from the FDA under the classification of a Class II medical device (21 CFR 862.1295). This means the device was determined to be substantially equivalent to a legally marketed predicate device, ensuring it meets FDA safety and effectiveness requirements for its intended use in clinical chemistry laboratories.
Are there any specific storage requirements mentioned for this reagent system?
The provided data does not include explicit storage instructions for the Access Theophylline Immunoassay Reagents. Typically, immunoassay reagents require refrigeration or specific temperature conditions to maintain stability and performance. For accurate storage guidelines, consult the manufacturer’s labeling or accompanying documentation.