Diasorin LIAISON 1-84 PTH Assay Recall: False High PTH Results
Diasorin recalls LIAISON 1-84 PTH Assay kits with potential for false high parathyroid hormone results. Affected lots: 134909, 134909A, 134909B. Contact for remedy.
Lower-risk recall
Potential for system to produce falsely elevated parathyroid hormone (PTH) results from patient samples.
Contact the company
What happened, in plain English
Diasorin is recalling LIAISON 1-84 PTH Assay kits that may produce falsely elevated parathyroid hormone results. This could lead to incorrect diagnoses of calcium disorders if used in medical testing. Read more at govinfonow.com/recall/63822-diasorin-liaison-1-84-pth-assay-recall-false-high-pth.
Source Summary by GovInfoNow · govinfonow.com/recall/63822-diasorin-liaison-1-84-pth-assay-recall-false-high-pth · Updated August 19, 2026 · FDA enforcement record: FDA #Z-1342-2021
Cite this page
“Diasorin LIAISON 1-84 PTH Assay Recall: False High PTH Results.” GovInfoNow, updated August 19, 2026. https://govinfonow.com/recall/63822-diasorin-liaison-1-84-pth-assay-recall-false-high-pth. Based on FDA recall #Z-1342-2021 (https://api.fda.gov/device/enforcement.json?search=recall_number:%22Z-1342-2021%22&limit=1).
Why it’s dangerous
The test may give false high readings for parathyroid hormone in patient samples. This could cause incorrect diagnoses of hypercalcemia or hypocalcemia, which are conditions related to calcium metabolism.
Who’s affected
Healthcare providers using the LIAISON 1-84 PTH Assay kits for blood tests. Patients receiving inaccurate calcium disorder diagnoses due to false high PTH results.
How to tell if you have this one
Check for lot numbers 134909, 134909A, or 134909B on the LIAISON 1-84 PTH Assay kits. These were sold with the LIAISON Analyzer family.
- Brand
Diasor: LIAISON- Category
Medical device
What to do — step by step
Check Kit Lot Number
Look for lot numbers 134909, 134909A, or 134909B on the LIAISON 1-84 PTH Assay kits.
Where it went and when
Where it was distributed
Distributed nationwide and abroad; the notice names 5 states.
FDA distribution: “Worldwide distribution - US Nationwide in the states of KY, OH, GA, PA, FL and the countries of Canada, Argentina, Bahrain, Bosnia & Herzegovnia, Iraq, Jordan, Morocco, Nepal, Russia, Serbia, Singapore, Taiwan, Thailand, Tunisia, Dubai,…” States read from FDA’s own wording; “not listed” means the notice does not name it.
Named in the notice: Florida, Georgia, Kentucky, Ohio, Pennsylvania.
Recall timeline
FDA terminated this recall 2.6 years after the firm started it.
- Firm started the recall
- FDA classified it Class II
- Published in FDA’s Enforcement Report
- FDA terminated the recall
Dates from the agency record only; steps without a date are left out.
Questions people ask
Are there any safety risks to users?
The hazard is a potential for false high PTH results, which could affect medical diagnoses but does not pose a direct safety risk to users.
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Where this comes from
The facts (hazard, remedy, dates, manufacturer) are pulled from the official FDA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
- Official source: FDA Recall #Z-1342-2021 (November 23, 2020) — FDA publishes no per-recall page; this is the official machine-readable enforcement record. Search FDA recalls for Z-1342-2021 to see it in context.
- Plain-language summary written by qwen3:4b on August 19, 2026, from the official record above. Not reviewed by a person — if it conflicts with the FDA notice, the notice is correct. Report an error on this page.
- GovInfoNow is an independent service and is not a government agency. We republish official FDA recall data; we don’t issue, amend or administer recalls.