A Comparison Between Posterior, Lateral and Medial Approaches for Ultrasound-guided Popliteal Block

Methods: In this randomized, controlled clinical trial, one hundred and twenty ASA physical status of class I and II patients undergoing below-knee surgery were involved. These patients were divided into three equal groups at randomly based on the route assigned for the US-guided popliteal block: the posterior, lateral, and medial approach groups. In this study, technical characteristics \[number of attempts to get the proper injection site and block performance time\], anesthetic and analgesic characteristics \[success rate, block onset, potency, and duration, time to ask, and the consumed amount of postoperative analgesia\], discomfort rate in respect to position and needle insertion and the associated complications were recorded.