title: Effectiveness of ultrasound-guided corticosteroid injection for the treatment of gluteus medius tendinopathy.
abstract: OBJECTIVE
  The objective of our study was to evaluate the effectiveness of ultrasound-guided corticosteroid injection for the treatment of gluteus medius tendinopathy.
  
  
  METHODS
  We prospectively evaluated 54 consecutive patients (48 women, six men; mean age, 54.7 years; mean body mass index, 26 kg/m2) with a clinical diagnosis of gluteus medius tendinopathy. Pain assessment using a 10-cm visual analog scale (VAS) was obtained as part of the initial clinical evaluation of all patients. A hip ultrasound study was performed followed by a gluteus medius peritendinous ultrasound-guided injection of 30 mg of triamcinolone combined with 3 mL of bupivacaine 0.5% using an anterior oblique coronal plane. One month after treatment, participants were reassessed clinically, and they were asked to quantify their pain using the VAS pain score and their satisfaction with the outcome of the injection using a 4-point rating scale (very satisfied, somewhat satisfied, somewhat dissatisfied, or very dissatisfied). Statistical analysis included a paired Student's t test (comparison of pain levels before and after treatment, p=0.05) and a multivariate analysis of covariance.
  
  
  RESULTS
  There was a 55% average reduction of pain level before versus after treatment (mean VAS pain score, 6.4 vs 2.9 cm, respectively; p<0.001). One month after treatment, 72% of the patients showed a clinically significant improvement in pain level, which was defined as a reduction in the VAS pain score of >or=30%. Seventy percent of patients were satisfied with the results of the intervention. No correlation was shown between treatment outcome and any of the clinical variables or ultrasound findings.
  
  
  CONCLUSIONS
  Our study shows that a peritendinous ultrasound-guided corticosteroid injection may be an effective treatment of gluteus medius tendinopathy.
authors.affiliation: Department of Radiology, Centre Hospitalier de l'Université de Montréal (CHUM), Pavillon Saint-Luc, 1058 rue Saint-Denis, Montréal, QC, Canada H2X 3J4.
authors.forename: Julie M
authors.initials: JM
authors.lastname: Labrosse
authors.forename: Etienne
authors.initials: E
authors.lastname: Cardinal
authors.forename: Bernard E
authors.initials: BE
authors.lastname: Leduc
authors.forename: Jacques
authors.initials: J
authors.lastname: Duranceau
authors.forename: Jean
authors.initials: J
authors.lastname: Rémillard
authors.forename: Nathalie J
authors.initials: NJ
authors.lastname: Bureau
authors.forename: Assia
authors.initials: A
authors.lastname: Belblidia
authors.forename: Paul
authors.initials: P
authors.lastname: Brassard
mesh_terms: D000305:Adrenal Cortex Hormones / Q000008:administration & dosage / Q000627:therapeutic use*; D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D002081:Buttocks / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007267:Injections; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011446:Prospective Studies; D052256:Tendinopathy / Q000000981:diagnostic imaging* / Q000188:drug therapy*; D018084:Ultrasonography, Interventional
chemical_list: D000305:Adrenal Cortex Hormones