Difference between revisions of "X-ray of Hansson pins"
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| + | Hansson pins are also called LIH pins after its developer Lars Ingvar Hansson, and are widely used in Sweden and the UK.<ref>{{cite journal|title=Lars Ingvar Hansson 1937–1987|journal=Acta Orthopaedica Scandinavica|volume=58|issue=6|year=2009|pages=685–692|issn=0001-6470|doi=10.3109/17453678709146515}}</ref> | ||
==Planning== | ==Planning== | ||
Revision as of 15:10, 14 January 2019
Author:
Mikael Häggström [notes 1]
Hansson pins are also called LIH pins after its developer Lars Ingvar Hansson, and are widely used in Sweden and the UK.[1]
Contents
Planning
Frontal and lateral projections.
Post-operative evaluation
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.[2]
Fracture alignment
"No misalignment" means:[2]
- 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.
