Continuation of axillary vein
Joins internal jugular vein to form brachiocephalic vein → SVC

subclavian line landmarks

infraclavicular region
around ⅓ mark of clavicle - between medial and middle third
infraclavicular approach: either ⅓ mark or midpoint
advance superomedially toward sternal notch

#anatomy-head-neck

sources/links

https://www.msdmanuals.com/professional/critical-care-medicine/how-to-do-central-vascular-procedures/how-to-do-infraclavicular-subclavian-vein-cannulation#Step-by-Step-Description-of-Procedure_v48804356