In patients with subcutaneous neck emphysema, ultrasound images of the internal jugular vein are unclear due to air bubbles. Central venous catheterization can be safely achieved by pushing the accumulated air laterally using an ultrasound probe.Reference:
Bae SI, Cho SB, Lee SH, Park KE, Hwang Y, Kim S, Sohn JT. Ultrasound-guided central venous catheterization via internal jugular vein in a patient with subcutaneous neck emphysema: A case report. Clin Case Rep. 2021 Jul 19;9(7):e04452. doi: 10.1002/ccr3.4452. PMID: 34295483; PMCID: PMC8287309.