Fig. 4From: Fascial plane blocks for cardiothoracic surgery: a narrative review A Patient and probe position. The patient is in the supine position and a high-frequency linear probe is placed just below the tube emergence from the skin. B The local anesthetic injected between the rectus abdominis muscle and its sheath. LRAM, left rectus abdominis muscle; LAMS, left abdominis muscle sheath; N, needleBack to article page