Regional anesthesia is frequently used in adults and children as part of multimodal analgesia or as a direct anesthesia method. Nowadays, these regional blocks can be applied more safely with the widespread use of ultrasound in daily clinical practice. Also, by identifying individual variations with ultrasound, the risk of block failure and possible complications has been minimized. Femoral nerve block and pericapsular nerve group block are now almost the first techniques used in hip and lower extremity surgeries or different indications. (1) Besides, these methods have become more advantageous in many aspects compared to spinal anesthesia in high-risk patients. However, to apply safe and successful regional anesthesia, both gross anatomy and sonoanatomy of the relevant region must be known well.~There are sufficient clinical and anatomical studies on these anesthesia methods applied in the inguinal region in adults, and there is no anatomical and anthropometric study in children. (2,3) However, well-known anatomic reference points for performing these blocks in adults may be different in children. (4) Therefore, with this study, we planned to develop appropriate anatomic reference points for these blocks in children by evaluating the relationship between sonography and inguinal region structures (such as distance, diameter measurement) in children's age groups.
This study aims to examine the sonoanatomy of the inguinal region in children according to age groups.