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MRI Findings Following Arthroscopic Hip Surgery

MRI Findings Following Arthroscopic Hip Surgery

MRI following arthroscopic hip surgery showed most patients experienced obliteration of the paralabral sulcus, whether they were symptomatic or not, according to a study published in Radiology.

Researchers from Switzerland sought to determine and compare the frequency of imaging abnormalities in asymptomatic and symptomatic patients after arthroscopic hip surgery.

Thirty-four patients, 17 asymptomatic and 17 symptomatic patients underwent 1.5-T MR arthrography of the hip one year following arthroscopic treatment of femoroacetabular impingement. All MR arthrographic images were independently analyzed by two readers for the presence of abnormal imaging findings, including:

Capsular adhesions at the femoral neck

Obliteration of the paralabral sulcus

Labral defects

Defects of the hip capsule in several anatomic positions (anterior to posterior)

The researchers compared the postoperative findings with linear and generalized linear mixed-effects regression models.

The results showed that 12 of the 34 patients (35%) had capsular adhesions at the anterior femoral neck, and there were no differences between those who were symptomatic or asymptomatic, or the readers. The paralabral sulcus was obliterated in at least one anatomic location in 94% of patients (reader 1, 32 of 34 patients) and 100% of patients (reader 2, 34 of 34 patients).

Changes that differed according between patient groups included:

 Asymptomatic patientsSymptomatic patients
Residual labral tears35% (6 of 17 pts) – Reader 1
53% (9 of 17 pts) – Reader 2
41% (7 of 17 pts) – Reader 1
53% (9 of 17 pts) – Reader 2
Defects of the hip capsule77% (13 of 17 pts) – Reader 1
53% (9 of 17 pts) – Reader 2
59% (10 of 17 pts) – for Reader 1
47% (8 of 17 pts) – for Reader 2

 

 

 

 

 

 

 

 

The researchers concluded that obliteration of the paralabral sulcus was the most frequent finding after arthroscopic hip surgery in both asymptomatic and symptomatic patients, and capsular adhesions at the anterior femoral neck were present in 35% of patients in both groups.

 
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