Low back pain caused by Iliopsoas tendinopathy treated with ultrasound-guided local injection of anesthetic and steroid: a retrospective study
Abstract Background Low back pain is a prevalent symptom that occur in all age of people, whereas the pathogenesis is unknown. Iliopsoas tendinopathy is an increasingly recognized hip disorder that may contribute to low back pain. Our purpose is to reveal the relationship of iliopsoas tendinopathy with low back pain and to evaluate the effect of ultrasound-guided local injection of anesthetic and steroid into iliopsoas tendon in treating low back pain. Methods This retrospective study reviewed 45 patients diagnosed with iliopsoas tendinopathy treated by B-ultrasound guided injection of lidocaine and triamcinolone into the iliopsoas tendon from March 2016 to June 2016. Medical records were collected to analyze the clinical presentation. Visual Analogue scale (VAS) and Harris Hip score (HHS) were administered to determine patient outcomes. Telephone follow-up was conducted, and the mean follow-up was 11 months. Results We observed that most patients with iliopsoas tendinopathy also complain chronic low back pain except for groin pain. After injection of anesthetic and corticosteroid into the iliopsoas tendon, the VAS fell from 7.82±1.35 to 2.73±1.24 immediately after the injection, and 0.8±0.75 at follow-up. The HHS improved from 41.09±17.67 to 97.89±2.79 at follow-up. Statistically significant difference (P<0.001) was observed. All patients returned to their original level of function and only seven patients (15%) presented with mild pain at the follow-up. Conclusions Low back pain is a prevalent presentation for iliopsoas tendinopathy. Diagnosis of iliopsoas tendinopathy should be considered in patients with low back pain with tenderness over the iliopsoas tendon. Ultrasound-guided local injection of anesthetic and steroid lead to satisfactory effect in relieving low back and groin pain and improving joint function.