# K161637: Poseidon OCT Spinal Fixation System

- Pathway: 510(k) (Traditional)
- Applicant: Medyssey USA, Inc.
- Decided: Jan 5, 2017 after 205 days
- Product code: NKG (Posterior Cervical Screw System)
- Device class: 2
- Regulation: 21 CFR 888.3075
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 3 generations back to K953076 (1997). 5 ancestors in all.
No later device cites it as a predicate yet.
0 of 6 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K142838: Synapse Occipital-Cervical-Thoracic (OCT) System, Synthes USA Products, LLC (2015) Summary page 4.
- K143471: VERTEX Reconstruction System, Medtronic Sofamor Danek USA, Inc. (2015) Summary page 4.

## Indications for use
The Poseidon OCT Spinal Fixation System is intended to provide immobilization and stabilization of spinal segments as an adjunct to fusion for the following acute and chronic instabilities of the craniocervical junction, the cervical spine (C1 to C7) and the thoracic spine (T1 to T3): traumatic spinal fractures and/or traumatic dislocations; instability or deformity; failed previous fusions (e.g., pseudoarthrosis); tumors involving the cervical/thoracic spine; and degenerative disease, including intractable radiculopathy and/or myelopathy, neck and/or arm pain of discogenic origin as confirmed by radiographic studies, and degenerative disease of the facets with instability. The Poseidon OCT Spinal Fixation System is also intended to restore the integrity of the spinal column even in the absence of fusion for a limited time period in patients with advanced stage tumors involving the cervical spine in whom life expectancy is of insufficient duration to permit achievement of fusion. In order to achieve additional levels of fixation, the Poseidon OCT Spinal Fixation System may be connected to the Medyssey Zenius, Iliad or Kora Spinal Systems using parallel connectors and taper rods.

Source page: https://510kreport.com/device/K161637
Methodology: https://510kreport.com/methodology