IRCT2017011832046N1 IRCT 2017-07-06 Vice Chancellor for Research and Technology Iran University Of Medical Sciences Comparing effectiveness of local steroid injection into carpal tunnel with surgery in the treatment of patients with mild to moderate carpal tunnel syndrome Comparing effectiveness of Local steroid injection versus CTR in the treatment of patients with mild to moderate CTS 2005-02-19 anticipated 94 Complete https://irct.ir/trial/25063 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: Patients and their type of intervention were determined by one person of research team randomly .In fact surgeons were unaware of patients who were admitted and should obey recommended intervention and patients were unaware of type of intervention and type of intervention was recommended by giving odd or even numbers to patients in which odds were CTR and evens local steroid injection and contributor was unaware of this characteristic. N/A Carpal tunnel syndrome. Intervention 1: Injection of 40 mg triamcinolone with 20 gm lidocaine into the carpal tunnel in intervention group. Intervention 2: Carpal tunnel release in control group.