Halo fixation system
US4541421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1984 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Apr 3, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F5/055
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Halo fixation system for fixation of a head about an orthopedic jacket with an attached halo assembly with respect to the cervical region such as for spine trauma. The halo fixation system includes eight fixated round ball-socket and rod assemblies, four assemblies affixed to the jacket and four assemblies in twin opposing captured elevation screw assemblies. The halo is adjustable through the twin captured elevation screw assemblies. Rods connected between the ball and socket assemblies of the jacket and of the captured elevation assemblies which support the halo. The halo can be either metal or composite material, and either a closed or open halo. The halo is omni adjustable about the head based on the omni directional adjustable rod in the ball-socket configurations located about the halo head piece and the jacket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.