# KHQ: Radioassay, Triiodothyronine Uptake

- Device class: 2; regulation: 21 CFR 862.1715; FDA's rule: 510(k) exempt
- FDA decisions: 93
- Recalls: 0 (0 Class I)
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026; MAUDE to Sep 30, 2026

## Decisions per year (last 10)
- 1989: 5
- 1990: 4
- 1991: 3
- 1992: 2
- 1993: 3
- 1994: 3
- 1995: 2
- 1996: 2
- 1997: 1
- 1998: 2

## Most-cited predicates
- K951586: T-Uptake Eia Test (1995), cited by 1
- K981375: Ace T Uptake Reagent TU Calibrators (1998), cited by 1
- K925257: Ciba Corning Acs T Uptake Immunoassay (1992), cited by 1
- K961488: Elecsys T-Uptake Assay (1996), cited by 1

Source page: https://510kreport.com/product-code/KHQ
Data by year (CSV): https://510kreport.com/product-code/KHQ.csv