Fig. 1From: Utility of erector spinae plane block in thoracic surgeryThe erector spinae plane block (ESP) block is typically performed with the patient in an upright position in the preoperative holding area a. Using a 10 MHz ultrasound probe, the erector spine muscle is identified just above the T5 transverse process b. A plane (arrow) is developed deep to the muscle by injecting ropivacaine c. A wire is then threaded via the needle in this plane d, and confirmed to be in the plane on ultrasound prior to securing itBack to article page