Investigation of how different halos influence pin forces.
biomechanical · Level V
Where this comes from
- Record sourced from PubMed, PMID 8029746.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
This study investigated the effect of the size and material of halo rings on the pin force produced at the halo pin-calvarium complex. Loosening of halo pins has been a problem with using the halo-vest apparatus to stabilize cervical spine fractures. One standard halo pin and seven different halo rings were used to test the anterior pin hole of each ring at a constant torque of 8 inch-pounds (0.9 Nm). Pin force fluctuated from halo to halo, and decreased as the nut was tightened. Identical torques applied to different halos will not guarantee the same magnitude of pin force for halo fixation.
Medical subject headings
- Bone Nails
- External Fixators
- Traction
Anatomy
- cervical spine