Influence of Knee Alignment and Pelvis Rotation on Accuracy of Radiograph Measurements Before Total Knee Arthroplasty

Valdoltra Orthopedic Hospital

Status: Completed

Conditions: Knee Osteoarthritis

Treatments: Radiation: CT scan

Study type: Observational

Funder types: Other

Identifiers

NCT05277883

Valdoltra - x-ray accuracy

Details and patient eligibility

About

The aim of this study is to determine the accuracy of long leg standing X-rays with respect to coronal alignment of the knee.

Full description

Long leg standing x-ray is a routine examination to measure the femoral valgus angle before a total knee arthroplasty. Newer studies have shown that coronal leg alignment influences the rotation of the distal femoral part. This rotation might influence the measurements obtained with a long leg standing x-ray.

The primary purpose of this study is to determine whether there is a significant difference between 2D measurements taken on the x-ray and 3D measurements obtained with a CT scan.

Enrollment: 112 patients

Sex: All

Ages: 50+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

Knee osteoarthritis scheduled for knee arthroplasty

Exclusion criteria

• previous leg deformities or surgery that changes alignment

Trial design

112 participants in 1 patient group

Group

Description:

All patients scheduled for a total knee arthroplasty without any previous lower limb deformities or previous hip/knee surgery will be enrolled. A long leg standing x-ray and a CT scan of the lower limb will be obtained for every patient.

Treatment:

Radiation: CT scan