Azo Dye, Calcium

Reports per year

Source: FDA adverse event reports by year received, 2012–2026. Reporting paused during the 2026 MAUDE-to-AEMS transition and has since resumed.

Recent recalls

• 2025-08-15Open, ClassifiedUnder Investigation by firm

  VITROS Chemistry Products Ca Slides; Catalog Number: 145 0261;

  Generations 67 and above of VITROS Ca Slides are experiencing an increased occurrence of Condition Code TH4-63J during calibration on VITROS XT 3400 and VITROS XT 7600 Systems, causing calibration failures that delay calcium test results and potentially impact patient management. The imaging reflectometer algorithm detects excessive "spikes" (imperfections) in slide images and generates the TH4-63J condition code when the threshold of 600 spikes is exceeded. Updated analysis revealed a 19-fold increase in failure rates from 0.0043% (2024 baseline) to 0.082% for Generation 67+ slides in 2025, with 100% of calibrator failures occurring at the lowest concentration level. This can result in delayed diagnosis and treatment of conditions such as hypercalcemic crisis, parathyroid disorders, and other calcium-related emergencies requiring urgent intervention.

• 2025-05-27Open, ClassifiedStorage

  ORTHO CLINICAL DIAGNOSTICS INC VITROS CALCIUM (L-SEQUESTER) (300/PK) REAGENT.

  transit delays of certain cold chain products due to severe thunderstorms which may caused the products to be stored outside the recommended labeled storage conditions. This failure could increase the probability of an incorrect test result or a delayed test result.

• 2014-01-14TerminatedDevice Design

  Vital Diagnostics Envoy Calcium Reagent For In-Vitro Diagnostic Use. PN 55285 For the quantitative measurement of calcium in plasma and serum

  High positive calcium bias on plasma sample versus results on serum

• 2014-01-14TerminatedDevice Design

  Consult Diagnostics Eon Calcium Reagent For In-Vitro Diagnostic Use PN: 1429 For the quantitative measurement of calcium in plasma and serum

  High positive calcium bias on plasma sample versus results on serum

• 2013-11-15TerminatedEquipment maintenance

  VITROS Chemistry Products Ca Slides packaged as 300 slides/pack catalog number 1450261 VITROS Ca Slides quantitatively measure calcium (Ca) concentration in serum, plasma, and urine using VITROS 250/350/950/5,1 FS and 4600 Chemistry Systems and the VITROS 5600 Integrated System.

  Ortho Clinical Diagnostics is recalling Slide Dispense cartridges used with some VITROS Chemistry Product Slides due to slide dispense issues.

• 2013-11-07TerminatedDevice Design

  Calcium Arsenazo, CALA-0250, For the Quantitative Determination of Total Calcium in Human Serum. The kit label shows CALCIUM ARSENAZO, CALA-0250, R: 12x20 mL. The vial's label shows CALCIUM ARSENAZO, CALA-5220, 20 mL, . CALCIUM ARSENAZO is intended use for the quantitative in vitro diagnostic determination of total calcium in human serum and plasma on ELITech Clinical Systems Selectra Pro Series Analyzers. Calcium measurements are used in the diagnosis and treatment of parathyroid disease, a variety of bone diseases, chronic renal disease and tetany (intermittent muscular contractions or spasms). It is not intended for use in Point of Care setting.

  Calcium Arsenazo Reagent, reference CALA-0250, is recalled due to complaint of plasma specimens report high results than serum.

• TerminatedDevice Design

  Randox CALCIUM (Ca) Colorimetric Method RX Series Cat. No. CA 3871, R1. Arsenazo Reagent 9 x 51ml GTIN: 05055273200904

  Update to the carryover avoidance technical bulletin to introduce additional steps for reagent carryover avoidance with the Calcium assay on RX instruments. Carryover to the Calcium reagent results may result in falsely elevated or decreased results to both patient and QC samples.

• TerminatedDevice Design

  Randox CALCIUM (Ca) COLORIMETRIC METHOD RX DAYTONA PLUS Cat. No. CA 8309 R1, Arsenazo Reagent 4 x 20 ml GTIN: 05055273208368

  Update to the carryover avoidance technical bulletin to introduce additional steps for reagent carryover avoidance with the Calcium assay on RX instruments. Carryover to the Calcium reagent results may result in falsely elevated or decreased results to both patient and QC samples.

• Open, ClassifiedDevice Design

  Atellica CH Calcium_2 (CA_2), Siemens Material Number 11097644

  Siemens Healthcare Diagnostics Inc. has confirmed the potential for reagent carryover impacting quality control (QC), patient samples, and calibrator results.

• TerminatedNonconforming Material/Component

  VITROS Chemistry Products Ca Slides, GEN 29, REF/Product Code 145 0261, Unique Device Identifier No. 10758750009114 or 20758750009111, IVD -- Sales Unit: 300 slides/pack Product Usage: For in vitro diagnostic use only. VITROS Ca Slides quantitatively measure calcium (Ca) concentration in serum, plasma, and urine. Calcium measurements are used in the diagnosis and treatment of parathyroid disease, a variety of bone disorders, chronic renal disease and tetany (intermittent muscular contractions or spasms).

  Ortho Clinical Diagnostics (OCD) confirmed a potential for biased calcium (Ca) results to be generated when using VITROS Ca Slides, GEN29, and the VITROS 250/350/950/5,1 FS, 4600 Chemistry System or the VITROS 5600 Integrated System. An increase in negatively biased calcium results complaints prompted the investigation that identified this product issue.