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Syndesmotic Injury and Fixation in Supination-External (SE) Ankle Fractures

Trauma Clinical Trial

Official title:
Syndesmotic Injury and Fixation in SE Ankle Fractures: A Prospective Randomized Study

Clinical Trial Summary

The aim of our study was to determine whether transfixation of unstable syndesmosis is necessary in supination-external rotation type ankle fractures. Our hypothesis was that syndesmotic ligaments heal at the proper length after malleolar reduction and that syndesmotic transfixation is not needed in supination-external rotation fracture types.

Clinical Trial Description

A prospective randomized study comparing syndesmotic transfixation to no fixation in AO/OTA Weber B-type ankle fractures was designed. To show a clinically significant difference (Olerud-Molander ankle score 20%, standard deviation (SD) 24 points, from our previous study) between the groups, the sample size was estimated (α=0.05, β=0.2, 20% drop out) to be 30 patients per group.

All skeletally mature patients (≥16 years old) with a unilateral Lauge-Hansen supination-external rotation type 4 ankle fractures treated within one week after injury at our hospital were considered eligible for the present study. Exclusion criteria were bilateral ankle fractures, pathologic fractures, concomitant tibial shaft fractures, previous significant injury or a fracture of either ankle, significant peripheral neuropathy, soft tissue infection in the region on either injured ankle, or inability to complete the study protocol.

After bony fixation, the 7.5-Nm standardized external rotation (ER) stress test for both ankles was performed under fluoroscopy. A positive stress examination was defined as a difference of more than 2 mm side-to-side in the tibiotalar or tibiofibular clear spaces on mortise radiographs. If the stress test was positive, the patient was randomized to either syndesmotic transfixation with 3.5-mm tricortical screws or no syndesmotic fixation.

Clinical outcome was assessed using the Olerud-Molander scoring system, RAND 36-Item Health Survey, and Visual Analogue Scale (VAS) to measure pain and function after a minimum 1-year of follow-up. ;

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT01234493
Study type Interventional
Source University of Oulu
Contact
Status Completed
Phase N/A
Start date June 2007
Completion date August 2010
View Details
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