# K912938: Rhythm

- Pathway: 510(k) (Traditional)
- Applicant: Stellate Systems
- Decided: Jul 30, 1991 after 25 days
- Product code: GWS (Analyzer, Spectrum, Electroencephalogram Signal)
- Device class: 1
- Regulation: 21 CFR 882.1420
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
31 later devices descend from it; 3 cite it directly.
0 of 32 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA lists a 510(k) statement for it but has not posted the file, so its predicates are not known.

## Most influential descendants
- K974748: Neurometric Analysis System (1998), 29 descendants of its own
- K041263: Neuroguide Analysis System (2004), 21 descendants of its own
- K092039: Identevent, Version 1.0G (2009), 9 descendants of its own
- K092573: Nihon Kohden QP-160AK Eeg Trend Program (2010), 7 descendants of its own
- K161068: Ahead 300 (2016), 6 descendants of its own

Source page: https://510kreport.com/device/K912938
Methodology: https://510kreport.com/methodology