# K915856: Sensormedics 4000 Series Sleep System

- Pathway: 510(k) (Traditional)
- Applicant: Sensor Medics Corp.
- Decided: Oct 26, 1992 after 304 days
- Product code: OLZ (Automatic Event Detection Software For Polysomnograph With Electroencephalograph)
- Device class: 2
- Regulation: 21 CFR 882.1400
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
245 later devices descend from it; 5 cite it directly.
0 of 246 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
- K012085: Somno Star & Series Sleep System (2001), 99 descendants of its own
- K030379: Aplab, Model 801D0030 (2003), 98 descendants of its own
- K981034: Silent Night II (1998), 96 descendants of its own
- K000253: Silent Night V (2000), 69 descendants of its own
- K042745: Lifescreen Apnea (2005), 63 descendants of its own

Source page: https://510kreport.com/device/K915856
Methodology: https://510kreport.com/methodology