# K990697: RS-4V Muscle Stimulator

- Pathway: 510(k) (Traditional)
- Applicant: Rs Medical
- Decided: Jun 18, 1999 after 107 days
- Product code: IPF (Stimulator, Muscle, Powered)
- Device class: 2
- Regulation: 21 CFR 890.5850
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 2 generations back to K926510 (1993). 4 ancestors in all.
No later device cites it as a predicate yet.
0 of 5 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K953136: RS-4M, Rs Medical (1995) Summary page 1.
- K973223: Stellar Model HS-04, Stellar Medical Corp. (1998) Summary page 1.

## Indications for use
Muscle Stimulator Modality Relax muscle spasms Prevent or retard disuse atrophy Maintain or increase range of motion Increase local blood circulation Re-educate muscle Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis Interferential Current Modality Relieve acute pain Relieve and manage chronic pain Relax muscle spasms Maintain or increase range of motion Increase local blood circulation

Source page: https://510kreport.com/device/K990697
Methodology: https://510kreport.com/methodology