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"Because there was no other appropriate route, we decided to insert the cannulation through the right cephalic vein, which was measured at 0.28 cm in diameter under ultrasound" Jiang et al (2022).
Cephalic vein central venous access

Extract:

“Thirteen days after admission, she required to change the right supraclavicular central venous line due to continuous vasopressor support and invasive hemodynamic management for heart failure and ARDS. Because there was no other appropriate route, we decided to insert the cannulation through the right cephalic vein, which was measured at 0.28 cm in diameter under ultrasound. The cannulation was successfully performed guided by ultrasound through the Seldinger technique, with the inserted length of 20 cm suitable for monitoring of central venous pressure (Fig. 1). Daily bedside ultrasound did not detect thrombosis within the cephalic vein.”

Reference:

Jiang S, Shen Y, Zhao X. Central venous catheterization: the cephalic vein access. Crit Care. 2022 Jun 8;26(1):169. doi: 10.1186/s13054-022-04031-y. PMID: 35676729.