# K941577: Dynatron 550

- Pathway: 510(k) (Traditional)
- Applicant: Dynatronics Corp.
- Decided: Sep 1, 1995 after 519 days
- Product code: LIH (Interferential Current Therapy)
- Device class: 2
- Regulation: 21 CFR 882.5890
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
118 later devices descend from it; 2 cite it directly.
0 of 119 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
- K981976: Acutron Mentor Model 961 (1998), 79 descendants of its own
- K990787: TRIO 300 (1999), 78 descendants of its own
- K023231: Elfcare Device, Models 314A Through 314G (2003), 63 descendants of its own
- K031329: Dynatron Solaris Series, Models 705, 706, 708, 709 D880 Infrared Probe (Optional Accessory) (2003), 37 descendants of its own
- K063715: Juniper Cooling Device Xtra (2007), 35 descendants of its own

Source page: https://510kreport.com/device/K941577
Methodology: https://510kreport.com/methodology