2021 Annual Meeting Knee Access Pass-Sensitivity of Preoperative Imaging for Patellofemoral Instability

Sensitivity of Preoperative Imaging for Patellofemoral Instability

Video Transcription

Video Summary

This study evaluated the sensitivity of MRI and x-ray in detecting osteochondral defects and loose bodies in patients undergoing surgery for patellar instability. Results showed both imaging modalities have poor sensitivity, with MRI slightly better than x-ray but still missing many injuries. Nearly half the patients required chondral interventions during surgery that were not identified on imaging. The findings suggest diagnostic arthroscopy during MPFL reconstruction may be necessary to detect and address chondral pathology missed by preoperative imaging. This supports careful consideration of imaging limitations when deciding on operative treatment for acute patellar dislocations.

Asset Caption

Dr. Hayden Baker

Keywords

MRI sensitivity

x-ray sensitivity

osteochondral defects

patellar instability

diagnostic arthroscopy