Supraclavicular Left Subclavian Vein in Pediatrics

The supraclavicular approach to subclavian vein access employs a long-axis (LAX) view technique. The left subclavian vein is longer than the right. The dynamic needle tracking (DNT) technique is essential to avoid breaching the posterior wall of the subclavian vein, as the pleura is adjacent to this posterior wall. This approach’s anterior-to-posterior puncture direction contrasts with the infraclavicular approach, where the needle orientation is parallel to the pleura. The vein’s diameter is smaller in smaller patients, increasing the risk of transvenous puncture, while in larger patients (typically over approximately 8 years of age), the vein’s diameter is larger, facilitating vessel cannulation with a reduced risk of traversal. It is advisable to avoid puncture near the junction of the left internal jugular and subclavian vein to prevent injury to the thoracic duct. Unlike other subclavian vein access routes (infraclavicular or extrathoracic), this method does not carry the risk of the guidewire deviating toward the ipsilateral jugular vein.