X-ray of Hansson pins
Revision as of 15:30, 12 December 2018 by Mikael Häggström (talk | contribs) (→Fracture alignment: Specified)
Author:
Mikael Häggström [notes 1]
Contents
Planning
Frontal and lateral projections.
Post-operative evaluation
File:X-ray of Hansson pins with contact points.jpg
Support points
The pins should be at least 2 cm apart on frontal projection, and have <10° angle compared to each other.
Support points
For proper support, both pins should have support by the subchondral plate and the lateral cortex. In addition, the middle of the inferior pin should be supported by the medial cortex, and the middle of the posterior pin should have support from the medial cortex, with less than <5 mm distance from subchondral bone.[1]
Fracture alignment
"No misalignment" means:[1]
- Dislocation of less than 2 mm
- 0-15° valgus angle on frontal projection
- Dorsal tilt of <10° on lateral projection
Report
Example: Inserted Hansson pins have proper positions. No fracture misalignment.
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
References
- ↑ 1.0 1.1 Marsel Toplić, Carl Mellner. LIH-spikning (Hansson Pin). ortobas.se.
