Acid, Lactic, Enzymatic Method（KHP）

VITROS Chemistry Products LAC Slides on VITROS XT 3400 and VITROS XT 7600 Systems are experiencing an increased occurrence of calibration failure related to lots from coating 0130 and above with Condition Code TH4-63J during calibration, causing the delay of lac test results and potentially impact patient management. The issue was identified by QuidelOrtho through an increase in customer complaints compared to the historical baseline with average failure rate of 1% for coating 0130 in 2025 while average of failure rate for other coating was 0.06% in 2025 and average of failure rate for all coatings is 0.03% for 2024.

VITROS Chemistry Products LAC Slides on VITROS XT 3400 and VITROS XT 7600 Systems are experiencing an increased occurrence of calibration failure related to lots from coating 0130 and above with Condition Code TH4-63J during calibration, causing the delay of lac test results and potentially impact patient management. The issue was identified by QuidelOrtho through an increase in customer complaints compared to the historical baseline with average failure rate of 1% for coating 0130 in 2025 while average of failure rate for other coating was 0.06% in 2025 and average of failure rate for all coatings is 0.03% for 2024.

The I-STAT BLUE CHEM8+ and CG4+ cartridges are not FDA cleared and do not have CLIA waived status. CLIA recognizes two types of laboratory tests: waived and non-waived. Different CLIA standards apply to waived and non-waived tests as well as the facilities that perform these types of tests. The i-STAT CHEM8+ cartridge contains nine measured assays (sodium, potassium, chloride, blood urea nitrogen (BUN), ionized calcium, TCO2, glucose, creatinine and hematocrit) and is categorized as a CLIA waived test for venous whole blood samples, meaning this cartridge could be used in a facility with a CLIA Certificate of Waiver as a waived test.

New endogenous interference claims have been established for the following assays used on the cobas c 311 analyzer and the cobas c 501, 502, 701, 702, and Modular Analytics P/D modules which may have potential medical risk. ***Update: Cobas c111 and COBAS INTEGRA 400 plus analyzers are also impacted for BILT3 and LACT2 assays***

Abbott has identified negative interference from the drug N-Acetyl Cysteine (NAC) with the ARCHITECT Lactic Acid reagent (LN 9D89-21).

Ortho Clinical Diagnostics confirmed that N-Acetylcysteine (NAC), a drug used for acetaminophen overdose, mucolytic therapy and is used as nutritional supplement, can interfere with VITROS GLU, LAC, TRIG, and URIC Slides assays.

Some v2.2.2 upgrade kits include a dialysate mode which not cleared/approved for shipment in the United States

Beckman Coulter has identified that Dipyrone (Metamizole) may cause erroneous, false low results in the following assays: Cholesterol OSR6X16, Triglyceride OSR6X118, Uric Acid OSR6X98, Lactate OSR6X93, and Lipase OSR6X30.

N-Acetylcysteine (NAC) present in the blood of patients treated for paracetamol overdose can interfere with the Trinder reaction that uses hydrogen peroxide catalytic on aminoantipyrine and phenol, and can produce falsely low results with the reagents using the Trinder reaction method.

RAPIDPoint 500 measurement cartridge serial numbers 2517102517 through 2519000012, negative sodium bias on both QC and patient results

RAPIDPoint 500 measurement cartridge serial numbers 2517102517 through 2519000012, negative sodium bias on both QC and patient results

RAPIDPoint 500 measurement cartridge serial numbers 2517102517 through 2519000012, negative sodium bias on both QC and patient results

RAPIDPoint 500 measurement cartridge serial numbers 2517102517 through 2519000012, negative sodium bias on both QC and patient results

When both ports (Serial and Ethernet) are configured to transmit data, the data stream from one port could potentially affect the data stream from the other port causing the data management system to include either: duplicate data, missing data, or data from a different patient.

N-Acetyl Cysteine (NAC), when administered in therapeutic concentrations for the treatment of acetaminophen overdose, interferes with the assays for these analytes: Cholesterol OSR6X16, Uric Acid OSR6X98, Lactate OSR6X93, and Lipase OSR6X30. NAC interference may lead to falsely low results.

RAPIDPoint 500 Measurement Cartridges may have an error code one or more electrolyte parameters (e.g., Na+, Ca++, K+, Cl-)

Beckman Coulter has confirmed customer reports of LACT Lot M210077 failing calibration with error condition OCR LOW. The calibration failures appear to be related to improper shipping or storage conditions (frozen reagent). Failed calibration of LACT may cause a delay in reporting results.

Beckman Coulter initiated the recall for the Lactate Assay (LACT) Lot M206209 as they received a customer complaint of error message (RXN RATE HI), i.e. no numerical values reported for samples containing Lactate concentration greater than 6.5 mmol/L.

RADIOMETER became aware that some membranes may have enzyme residue on the outer membrane. The enzyme residue may cause an initial negative bias on the reported Lactate result upon replacement of the Lactate membrane.