Associations Between Unhealed Capsular Quantitative Parameters and Clinical Symptoms After Arthroscopic Surgery in Patients With Femoroacetabular Impingement Syndrome: A Propensity Score–Matched Study
Wei-Xing Li, Hai-Ning Long, Li Sun, Yi-Wen Hu, Lin-Yi Shen, Hong-Yun LiBackground:
Several studies have begun to use magnetic resonance imaging (MRI) to explore the healing status of the joint capsule after femoroacetabular impingement syndrome (FAIS) surgery. However, there is a paucity of studies on unsutured cases as well as quantitative analysis on their postoperative unhealed capsule.
Purpose:
To evaluate the quantitative parameters of postoperative unhealed capsule in patients with FAIS and analyze the associations of these parameters with postoperative clinical symptoms and outcomes.
Study Design:
Case-control study; Level of evidence, 3.
Methods:
Patients with FAIS aged 18 to 70 years who underwent hip arthroscopy with ≥2-year follow-up were included. Capsular healing status was assessed via MRI, measuring unhealed length, cross-sectional area, and volume. Patients were divided into symptomatic and asymptomatic groups using propensity score matching. The propensity score–matched method was used to match patients with symptoms to those without.
Results:
A total of 72 patients with FAIS (74 hips) were included, with 37 hips allocated to the symptomatic group and 37 hips allocated to the asymptomatic group. No significant difference in unhealed rate between the 2 groups was found (
Conclusion:
Patients who underwent FAIS with postoperative symptoms had significantly greater quantitative data (length, section surface, volume) in unhealed joint capsules, which were negatively correlated with some patient-reported outcome measures. The unhealed length, section surface, and volume of unhealed capsules were identified as factors potentially associated with postoperative symptom occurrence.