A Video of Ultrasound-Guided S1 Transforaminal Epidural Injection Using Color Doppler: Technical Reports

Lumbosacral radicular pain with or without radiculopathy is a fairly common clinical condition. In such cases, lumbosacral transforaminal epidural injection (TFEI) is one of the most commonly performed interventions. Recent studies have explored the effectiveness of ultrasound (US)-guided lumbosacral TFEI. Most of these studies have focused on lumbar TFEI via an in-plane approach. S1 TFEI can also be easily performed, since the S1 foramen is more superficial than the lumbar foramen. However, most studies regarding US-guided sacral TFEI use an out-of-plane technique. Therefore, in this report we present a video of US-guided S1 TFEI via an in-plane approach.