Real-Time Ultrasound Improves Accuracy of Caudal Block in Children

BACKGROUND: Caudal block, the most common regional anesthetic in children, is predominantly performed using palpation to determine placement. The efficacy of the palpation technique is unknown with respect to block success. While ultrasound has been suggested for use during caudal block, its use is infrequent. METHODS: A single-blinded prospective observational trial was performed evaluating provider success rate of caudal blocks placed by palpation alone. After needle insertion and partial local anesthetic injection, an ultrasound was performed to confirm correct location. RESULTS: A total of 109 caudal blocks were performed during the prospective observational study. Success rate for caudal blocks done by palpation alone was 78.9% as confirmed by ultrasound. In 21.1% of caudal blocks, the provider incorrectly judged the needle to be in the caudal space as confirmed with ultrasound. CONCLUSIONS: Real-time ultrasound visualization of local anesthetic injection provides reliable and immediate confirmation during caudal block in children. Accepted for publication January 8, 2019. Funding: Departmental. The authors declare no conflicts of interest. Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal's website (https://ift.tt/KegmMq). This work was presented in abstract form at the 43rd Annual Regional Anesthesiology and Acute Pain Medicine Meeting, New York, NY, April 21, 2018. Reprints will not be available from the authors. Address correspondence to Adam C. Adler, MD, MS, FAAP, FASE, Texas Children's Hospital, Baylor College of Medicine, 6621 Fannin St, Suite #A3300, Houston, TX 77030. Address e-mail to adam.adler@bcm.edu. © 2019 International Anesthesia Research Society

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