# K040894: Qbtest

- Pathway: 510(k) (Traditional)
- Applicant: Qbtech AB
- Decided: Jun 22, 2004 after 77 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
Longest line of descent: 2 generations back to K854903 (1986). 2 ancestors in all.
5 later devices descend from it; 1 cites it directly.
0 of 8 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K020800: Optax System, Optax Systems, Inc. (2002) Summary page 1.

## Most influential descendants
- 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
- K143468: QbCheck (2016), 0 descendants of its own
- K141865: DANA (2014), 0 descendants of its own

## Indications for use
QbTest provides clinicians with objective measurements of hyperactivity, impulsivity, and inattention to aid in the clinical assessment of ADHD. QbTest results should be interpreted only by qualified professionals.

Source page: https://510kreport.com/device/K040894
Methodology: https://510kreport.com/methodology