# K844216: Grass Model NL Facial Nerve Locator & Monitor

- Pathway: 510(k) (Traditional)
- Applicant: Grass Instrument Co.
- Decided: Jan 18, 1985 after 79 days
- Product code: JXE (Device, Nerve Conduction Velocity Measurement)
- Device class: 2
- Regulation: 21 CFR 882.1550
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
3 later devices descend from it; 1 cites it directly.
0 of 4 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
- K970971: Uro Med Nerve Stimulator (1997), 2 descendants of its own
- K993436: Cavermap Surgical Aid (2000), 1 descendant of its own
- K200886: StimSite (2020), 0 descendants of its own

Source page: https://510kreport.com/device/K844216
Methodology: https://510kreport.com/methodology