# K033888: Msi Model S-500 RF Generator

- Pathway: 510(k) (Traditional)
- Applicant: Medsphere International, Inc.
- Decided: Apr 2, 2004 after 108 days
- Product code: GEI (Electrosurgical, Cutting & Coagulation & Accessories)
- Device class: 2
- Regulation: 21 CFR 878.4400
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 1 generation back to K963772 (1996). 1 ancestor in all.
1 later device descends from it; 1 cites it directly.
0 of 3 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K963772: Somnus Model 225 Electro Surgical Generator (Model 225), Somnus Medical Technologies, Inc. (1996) Summary page 1.

## Most influential descendants
- K041980: Msi S-500L RF Generator (2004), 0 descendants of its own

## Indications for use
Indicated for coagulation of soft tissue These devices are intended for use by qualified medical personnel trained in the use of electrosurgery.

Source page: https://510kreport.com/device/K033888
Methodology: https://510kreport.com/methodology