# K952273: Handmaster NMS1

- Pathway: 510(k) (Traditional)
- Applicant: Neuromusclar Electrical Stimulation Systems, Ltd.
- Decided: May 23, 1996 after 374 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: 1 generation back to K813008 (1981). 3 ancestors in all.
55 later devices descend from it; 4 cite it directly.
0 of 59 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K870947: Dynatron 500, Dynatronics Corp. (1987) Summary page 2.
- K854801: MS-189 Muscle Stimulator, Electro Med Supply, Inc. (1986) Summary page 2.
- K813008: Respond II...Neuromuscular Stimulator, Medtronic Vascular (1981) Summary page 2.

## Cited in the summary but kept off the family tree
- K850414: EMS 250 Electronic Muscle Stimulator. Not in FDA’s 510(k), De Novo or PMA lists as we hold them (a misreading, a typo, or a number FDA does not list), so it is kept off the family tree Summary page 2.

## Most influential descendants
- K982482: Handmaster NMS1 (1998), 54 descendants of its own
- K031900: Handmaster (2003), 35 descendants of its own
- K080950: Stiwell MED4 (2009), 34 descendants of its own
- K110179: Incontrol (2012), 21 descendants of its own
- K022776: Ness System (2002), 17 descendants of its own

## Indications for use
The N.E.S.S. HANDMASTER NMS1 is intended to be used to exercise the lower arm and hand by activating the muscles thereof with electrical stimulation. As a powered muscle stimulator, the HANDMASTER NMS1 is intended to be used for the following indications: Maintenance or increase of range of motion, reduction of spasticity, prevention or retardation of disuse atrophy, facilitation and re-education of voluntary motor function, and influencing local blood circulation.

Source page: https://510kreport.com/device/K952273
Methodology: https://510kreport.com/methodology