# K172897: Neck Care Therapy, Model: SYK 509B

- Pathway: 510(k) (Traditional)
- Applicant: Shenzhen Osto Technology Co., Ltd.
- Decided: Dec 7, 2018 after 441 days
- Product code: NUH (Stimulator, Nerve, Transcutaneous, Over-The-Counter)
- 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
Longest line of descent: 6 generations back to K940301 (1994). 11 ancestors in all.
3 later devices descend from it; 3 cite it directly.
0 of 15 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K133929: Health Expert Elctronic Stimulator, Shenzhen Osto Technology Company Limited (2014) Summary page 4.

## Most influential descendants
- K210756: Neck Care Therapy, Model: AST-905A, AST-905D, AST-905H (2021), 1 descendant of its own
- K221092: Transcutaneous Electrical Nerve Stimulator Model: ST-304 (2022), 0 descendants of its own
- K200558: Smart Neck Stimulator (2021), 0 descendants of its own

## Indications for use
To be used for temporary relief of pain associated with sore and aching muscles in the shoulder, waist, back of neck, back, arm, and leg, due to strain from exercise or normal household and work activities. - Neck Pad is used in back of neck. - Meridian Pad is used in shoulder, waist, back, and arm.

Source page: https://510kreport.com/device/K172897
Methodology: https://510kreport.com/methodology