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Ultrasound image of the intercostal plane block of the anterior cutaneous branch (ACB) of the third intercostal nerve (ICN) on the left side. Local anesthetic spread (*) between the internal intercostal muscle (IIM) and the innermost intercostal muscle (imm). White arrow: needle. PM, pectoralis major muscle; SC, subcutis; EIM, external intercostal muscle. C3: 3rd rib. C4: 4th rib [Color figure can be viewed at wileyonlinelibrary.com]
