# K082051: Cosman G4 Radiofrequency Generator, Model RFG-4

- Pathway: 510(k) (Traditional)
- Applicant: Cosman Medical, Inc.
- Decided: Oct 16, 2008 after 90 days
- Product code: GXD (Generator, Lesion, Radiofrequency)
- Device class: 2
- Regulation: 21 CFR 882.4400
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 4 generations back to K870028 (1987). 9 ancestors in all.
7 later devices descend from it; 3 cite it directly.
0 of 17 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K050084: Cosman RF Lesion Generator, Model RFG-1A; Cosman Tew Trigeminal Electrode Kit; Cosman Tic Trigeminal Electrode Kit;, Cosman Medical, Inc. (2005) Summary page 1.
- K052878: NT-1000, Neuro Therm, Inc. (2006) Summary page 1.

## Most influential descendants
- K111576: NT 2000 Lesioning Generator (2011), 3 descendants of its own
- K231675: OneRF Ablation System (2023), 1 descendant of its own
- K251243: OneRF Trigeminal Nerve Radiofrequency Probes (2025), 0 descendants of its own
- K251247: GX1 Radiofrequency Generator Kit (RFG-X1-120V); GX1 Radiofrequency Generator Kit (RFG-X1-220V); GX1 Radiofrequency Generator Kit (RFG-X1-240V); GX1 System Release Rest of World (GX1-SYS-ROW); GX1 Radiofrequency Generator (51779845-01); GX1 Radiofrequency Generator (51779845-02); GX1 Radiofrequency Generator (51779845-03) (2025), 0 descendants of its own
- K232632: Racz Neurostat RF Generator (2024), 0 descendants of its own

## Indications for use
The Cosman G4 Radiofrequency Generator is indicated for use in procedures to create radiofrequency lesions for the treatment of pain, or for lesioning nerve tissue for functional neurosurgical procedures. The Cosman G4 Radiofrequency Generator is used with separately approved Cosman Radiofrequency Probes.

Source page: https://510kreport.com/device/K082051
Methodology: https://510kreport.com/methodology