# K940433: Doa Liquid Drugs of Abuse Controls Levls 2,3,& 4,G2,G3,& G4

- Pathway: 510(k) (Traditional)
- Applicant: Medical Analysis Systems, Inc.
- Decided: Jul 20, 1994 after 170 days
- Product code: DIF (Drug Mixture Control Materials)
- Device class: 1
- Regulation: 21 CFR 862.3280
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
9 later devices descend from it; 1 cites it directly.
0 of 10 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA has not posted a summary or statement for it, so its predicates are not known.

## Most influential descendants
- K983807: Lyphochek Tumor Marker Control, Model #580 (1998), 8 descendants of its own
- K992172: Lyphochek Tumor Marker Control, Model 580 (1999), 7 descendants of its own
- K011579: Lyphochek Tumor Marker Control, Levels 1 and 2, 2ML, Model 580 (2001), 6 descendants of its own
- K071675: Liquichek Tumor Marker Control (2007), 2 descendants of its own
- K082036: Lyphochek Tumor Market Plus Control Level 1, 2 and 3 and Minipak (2008), 1 descendant of its own

Source page: https://510kreport.com/device/K940433
Methodology: https://510kreport.com/methodology