# K173314: LessRay System

- Pathway: 510(k) (Traditional)
- Applicant: Nu Vasive, Incorporated
- Decided: Nov 16, 2017 after 28 days
- Product code: OWB (Interventional Fluoroscopic X-Ray System)
- Device class: 2
- Regulation: 21 CFR 892.1650
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 5 generations back to K013841 (2002). 5 ancestors in all.
4 later devices descend from it; 1 cites it directly.
0 of 10 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K142243: LessRay with Tracking, Saferay Spine, LLC (2014) Summary page 4.
- K170800: NuVasive LessRay with Enhanced Tracking, Nu Vasive, Incorporated (2017) Summary page 4.

## Most influential descendants
- K180038: NuVasive Pulse System (2018), 3 descendants of its own
- K210574: NuVasive Pulse System (2021), 2 descendants of its own
- K243814: NuVasive Pulse System (2025), 0 descendants of its own
- K230989: Rod Registration Frame (2023), 0 descendants of its own

## Indications for use
LessRay® System is intended for use in any application where a fluoroscope is incorporated to aid in diagnosis and treatment of disease.

Source page: https://510kreport.com/device/K173314
Methodology: https://510kreport.com/methodology