Intravenous literature: Hwang, G.S. (2012) Seeing is believing: ultrasound guidance for central venous access in clinical anesthesia. Korean Journal of Anesthesiology. 63(2), p.101-2.
Extract: “For anesthesiologists, central vascular cannulation is a fundamental clinical skill and is a vital component of the management of the hemodynamically unstable patients. Although obtaining central vascular access is generally not found to be a problem in the majority of patients with experienced hands, this procedure can have major and minor complications; its success rate depends highly on patient anatomy, combined disease status, and operator skill.”