# K854903: Gordon Diagnostic System Model I

- Pathway: 510(k) (Traditional)
- Applicant: Clinical Diagnostics, Inc.
- Decided: Jun 2, 1986 after 175 days
- Product code: LQD (Recorder, Attention Task Performance)
- Device class: U
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
8 later devices descend from it; 2 cite it directly.
0 of 9 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
- K020800: Optax System (2002), 6 descendants of its own
- K040894: Qbtest (2004), 5 descendants of its own
- K122149: QBTES (2012), 4 descendants of its own
- K133382: QB Test (2014), 2 descendants of its own
- K173915: Test of Variables of Attention (T.O.V.A.) (2018), 0 descendants of its own

Source page: https://510kreport.com/device/K854903
Methodology: https://510kreport.com/methodology